Caravan Help Needed
#1
03-21-2005, 11:58 PM
Caravan Help Needed
I have a Dodge Grand Caravan that the batary went bad and the LED Lights on the heating control system keeps flashing and after you drive for a while and then turn off, after a couple days the SRS ligh some time turn off when you turn the engine on and some times stays on constantly.
Is there any thing that I can do to re-set the computer or what is causing this issue to occur?
I really appreciate any advise that you can give me.
The Dodge Grand Caravan is V6, Year: 1998.
Thanks,
THX.
Is there any thing that I can do to re-set the computer or what is causing this issue to occur?
I really appreciate any advise that you can give me.
The Dodge Grand Caravan is V6, Year: 1998.
Thanks,
THX.
#3
03-24-2005, 09:38 PM
Veteran
Join Date: Feb 2005
Location: USA the greatest country
Posts: 304
Likes: 0
Received 0 Likes
on
0 Posts
RE: Caravan Help Needed
I dunno what the problems might be.....did you try to discontect the negitive terminal to your battery wait for 30 seconds & then put it back on.Kinda like a reboot.If that don't work maybe you're PCM might need to be recalibrated or reprogramed.
That's my guess.
I wish you luck Im in the same boat I too have a question & it get's hit's but no reply's either no one want's to help or nobody give's a ****!or Heck maybe both!
It's kinda sad, right now Im in the Market to buy a brand new truck & I like the new 05 Dakotas I want to get one and after doing some research it seems there not worth it.I want to do the right thing & stay with Domestic Cars & trucks but if there's problems with them & nobody wants to help,**** I might as well support the Friggin Nips & buy one of there Trucks and never have a problem!
THX I wish you luck with your Van.
That's my guess.
I wish you luck Im in the same boat I too have a question & it get's hit's but no reply's either no one want's to help or nobody give's a ****!or Heck maybe both!
It's kinda sad, right now Im in the Market to buy a brand new truck & I like the new 05 Dakotas I want to get one and after doing some research it seems there not worth it.I want to do the right thing & stay with Domestic Cars & trucks but if there's problems with them & nobody wants to help,**** I might as well support the Friggin Nips & buy one of there Trucks and never have a problem!
THX I wish you luck with your Van.
#4
03-24-2005, 11:24 PM
#6
03-24-2005, 11:59 PM
Veteran
Join Date: Feb 2005
Location: USA the greatest country
Posts: 304
Likes: 0
Received 0 Likes
on
0 Posts
#7
03-26-2005, 03:10 PM
Champion
RE: Caravan Help Needed
This may help.....it tells you how to run a HVAC control test and what the results mean....
ACTUATOR CALIBRATION/DIAGNOSTICS AND COOLDOWN TEST
GENERAL INFORMATION
If the HVAC control module is replaced, the Calibration Diagnostic and Cooldown tests will need to be performed. Once this group of tests have successfully passed, they can be performed individually. The engine must be running during the test to provide hot coolant for the heater, A/C compressor operation and to assure that the actuators are calibrated correctly. The HVAC control module is capable of troubleshooting the system in approximately 120 seconds. If a condition is detected, an error code is displayed. The error code cannot be erased until the condition is repaired and the diagnostic test is preformed. Check wire before replacing components, Refer to Wiring diagrams
CAUTION: Do not remove the actuators from the Heater-A/C unit assembly with power applied. Removal should only be done with the Ignition OFF. The actuators have no mechanical stops to limit the travel. If the actuator rotates and is not connected to the unit assembly, it will become out of calibration.
ACTUATOR CALIBRATION
Mode, Blend and Zone (if equipped) door calibration compensates for mechanical variations in the actuators, HVAC control module and its linkages. In-vehicle calibration can be entered from the control's front panel. If the REAR WIPE and INTERMITTENT LED's flash simultaneously when Ignition is cycled ON, the actuators have not been calibrated or during the previous calibration a failure occurred Radio Bezel and HVAC Control and Radio Bezel and HVAC Control, Rear Blower Motor Switch and Zone Control Diagnostics will always occur during Calibration Diagnostic and Cooldown test.
DIAGNOSTICS
During the Actuator calibration, diagnostics are performed on the actuators and evaporator temperature Fin Sensor. Once diagnostics are completed the REAR WIPER and INTERMITTENT LED's will flash to indicate either a successful calibration or the appropriate fail code(s) At this time manual testing of the Blend, Mode and Driver (if equipped) potentiometers can be performed. If a failure is detected during Diagnostics a fault will be set in the control. When Ignition is cycled OFF and then ON or Diagnostics is aborted, the REAR WIPER and INTERMITTENT LED's will flash simultaneously showing that a failure has occurred. The control will not indicate the fail code, but only that a failure had occurred during the last diagnostics test. The only way to clear the failure codes is repeat the Calibration Diagnostic and Cooldown test, after all repairs are completed.
COOLDOWN TEST
This test has been designed for performance testing of the A/C system at the manufacturing facility. If the HVAC control module is replaced, the Cooldown test will occur during Calibration test. Cooldown will not occur on Heater Only units. During the Cooldown test the control will monitor the temperature of the Fin Sensor. The A/C system must be able to bring the evaporator temperature down to predetermined minimum temperature in less than 2 minutes.
CALIBRATION/COOLDOWN LED DISPLAY CODES
See chart for definition of LED's. If no problems are found, the control functions normally.
LED'S PASS/FAIL CORRECTIVE ACTION
NO LED'S FLASHING-NORMAL OPERATION PASSED CALIBRATION, DIAGNOSTICS AND COOLDOWN NONE
REAR WIPER AND INTERMITTENT LED'S FLASH SIMULTANEOUSLY FAILED CALIBRATION DIAGNOSTICS RUN CALIBRATION TEST
A/C AND RECIRC LED'S FLASH SIMULTANEOUSLY FAILED COOLDOWN RUN COOLDOWN TEST
REAR WIPER AND INTERMITTENT LED'S ARE FLASHING SIMULTANEOUSLY A/C AND RECIRC LED'S ARE FLASHING SIMULTANEOUSLY FAILED CALIBRATION, DIAGNOSTICS AND FAILED COOLDOWN TEST RUN CALIBRATION TEST
CALIBRATION/DIAGNOSTICS TEST ENTRY
TO INITIATE TESTS:
Set Blower motor ON HIGH
Set Mode position to Panel
Set Temperature to Cold (Both slide pots if equipped)
Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light)
RESULTS:
All LED's will turn on for 5 Seconds
Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cooldown test is running if A/C and RECIRC are alternately flashing.
Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.
After all tests have passed, Calibration Diagnostics and Cooldown can be run separately.
COOLDOWN TEST ENTRY
TO INITIATE TESTS:
Set Blower motor ON HIGH
Set Mode position to Panel
Set Temperature to Cold (Both slide pots if equipped)
Depress WASH and A/C simultaneously for 5 Seconds
NOTE: If the evaporator is already cold, operate system with A/C OFF and the blower motor ON high for three minutes prior to starting test.
RESULTS:
All LED's will turn on for 5 Seconds (Until all LED's light)
Cooldown Test is running when A/C and RECIRC. are alternately flashing. If A/C and RECIRC. are flashing simultaneously, Cooldown has failed. Make sure that the Blower motor is ON high, and temperature is ON full Cold, abort test and repeat Calibration Diagnostic and Cooldown test again.
Calibration Test is running when REAR WIPER and INTERMITTENT LED's are alternately flashing.
After all tests have passed, Cooldown test can be run separately.
Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.
CALIBRATION DIAGNOSTICS AND COOLDOWN ABORT
Test can be aborted by doing one of the following:
Depressing Rear Window Defogger, RECIRC and Rear Wiper buttons.
Cycling Ignition OFF and then ON.
Control will automatically abort after 15 minutes from the time Calibration Diagnostics and Cooldown was entered.
The HVAC control module will return to normal operation or may indicate unsuccessful Calibration Diagnostics or Cooldown test by LED's flashing simultaneously.
EEPROM DATA
Calibration Diagnostics, Cooldown Status and evaporator temperature Fin Sensor values are stored in an EEPROM memory internal to the control. The microcomputer within the HVAC control module uses this information:
To determine if Cooldown needs to run
For proper position of the Heater-A/C unit assembly doors
ACTUATOR CALIBRATION AND DIAGNOSTICS
NOTE: Do not run actuators unless they are properly mounted on the HVAC control module.
Actuator end point calibration takes approximately 60 seconds. The REAR WIPER and INTERMITTENT LED's will flash alternately during the test. The control will cycle the Blend actuator(s) to the Heat stop first then back to Cold. After the Blend actuator(s) have been calibrated the Mode actuator will be cycled to Defrost and then to Panel. Successful calibration is defined as actuator travel falling within their minimum and maximum limits.
BLEND/PASSENGER ACTUATOR BACKGROUND
The Blend/Passenger Actuator can move the temperature door in two directions. When the voltage at pin 12 of the control module is high, about 11.5V, and the voltage at pin 17 is low, about 1.5V, the door will move towards the Heat position. When pin 17 is High and pin 12 is Low the door will move towards the Cold position. When both pins are high or both pins are low, the actuator will not move. The Blend/Passenger feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.0 volts in the Heat position and 1.0 volt in the Cold position. As the position of the Blend/Passenger actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the temperature door.
DRIVER ACTUATOR BACKGROUND
The Driver Actuator can move the temperature door in two directions. When the voltage at pin 15 of the control module is high, about 11.5V, and the voltage at pin 13 is low, about 1.5V the door will move towards the Cold position. When pin 13 is High and pin 15 is Low the door will move towards the Heat position. When both pins are high or when both pins are low, the actuator will not move. The Driver feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.0 volts in the Heat position and 1.0 volt in the Cold position. As the position of the Driver Actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the temperature door.
MODE ACTUATOR BACKGROUND
The Mode actuator can move the mode door in two directions. When the voltage at pin 18 of the control module is high, about 11.5V, and the voltage at pin 12 is low, about 1.5V the door will move towards the Panel position. When pin 12 is High and pin 18 is Low the door will move towards the Defrost position. When both pins are high or when both pins are low, the actuator will not move. The Mode door feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.5 volts in the Panel position and.5 volts in the Defrost position. As the position of the Mode actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the mode door.
FAIL CODES/LEVEL DISPLAY
Fail Codes/Level are displayed using the REAR WIPER and INTERMITTENT LED's flashing in the sequence indicated below. The REAR WIPER LED represents the Level and the INTERMITTENT LED represents the Value. After Calibration/Diagnostics is completed, the control will begin flashing Level 1 codes. Depressing the WASH button will cycle to Level 2, depressing WASH again will cycle to Level 3. Each time the WASH button is depressed will cycle to the next level. After Level 5 is reached, you will cycle back to Level 1. If the Control is a Heater Only you will only cycle from Levels 1 to 3.
LEVEL DISPLAY
1 FAIL CODES
2 MODE POTENTIOMETER TEST
3 BLEND/PASS. POTENTIOMETER TEST
4 EVAPORATOR TEMPERATURE FIN SENSOR (A/C AND ZONE UNITS ONLY)
5 DRIVER POTENTIOMETER (ZONE UNITS ONLY)
CODE DEFINITION
0 PASSED ALL TESTS
1 MODE ACTUATOR DID NOT REACH DEFROST POSITION
2 MODE ACTUATOR DID NOT REACH PANEL POSITION
3 BLEND/PASS. ACTUATOR DID NOT REACH COLD STOP
4 BLEND PASS. ACTUATOR DID NOT REACH HEAT STOP
5 EVAPORATOR TEMPERATURE FIN SENSOR OPEN
6 EVAPORATOR TEMPERATURE FIN SENSOR SHORTED
7 DRIVER ACTUATOR DID NOT REACH COLD STOP
8 ZONE/DRIVER ACTUATOR DID NOT REACH HEAT STOP
9 CONTROL HEAD INTERNAL FAILURE
TEMPERATURE AND MODE POTENTIOMETER DIAGNOSTICS
The Temperature and Mode Potentiometer can be tested after calibration is complete by pressing the WASH button and cycling to Levels 2, 3 or 5 as displayed by the REAR WIPER LED. On Heater Only units you can only cycle to Levels 2 and 3. In each individual test the INTERMITTENT LED flash rate will change as the Temperature or Mode potentiometer is moved from one end to the other, see Potentiometer vs. Position and Flash Rate table.
POTENTIOMETER INTERMITTENT LED FASTER FLASH RATE INTERMITTENT LED SLOWER FLASH RATE
MODE PANEL DEFROST
BLEND/PASS. HEAT COLD
DRIVER HEAT COLD
EVAPORATOR TEMPERATURE FIN SENSOR TEMPERATURE DIAGNOSTICS
The evaporator temperature Fin Sensor can be tested by using the INTERMITTENT LED to display the actual temperature the sensor is reading. The HVAC control module can only display temperatures from 1 to 99 degrees. To read the temperature, perform the following:
Set Blower motor to any speed other than OFF
Set A/C to ON, if A/C Clutch does not engage make sure Fail Codes 5 and 6 are cleared.
Run Diagnostics (Depress REAR WIPER and REAR WASH)
When Diagnostics is complete, Cycle to Level 4.
To clear the error code 5 and 6 the evaporator temperature Fin sensor and/or the wiring repair needs to be completed. The Calibration Diagnostic Cooldown test ran, then press and hold the intermittent button for 5 seconds.
Display Sequence is as follows:
REAR WIPER LED will display the Level
INTERMITTENT LED will display ten's digit
Short Pause
INTERMITTENT LED will display the one's digit.
The HVAC control module will continue to cycle the Level and then Temperature until the level is changed or Calibration Diagnostics and Cooldown test is exited. If a condition is detected, the control will not return to normal operation until the condition is repaired, and the Calibration Diagnostic and Cooldown test is repeated.
ACTUATOR CALIBRATION/DIAGNOSTICS AND COOLDOWN TEST
GENERAL INFORMATION
If the HVAC control module is replaced, the Calibration Diagnostic and Cooldown tests will need to be performed. Once this group of tests have successfully passed, they can be performed individually. The engine must be running during the test to provide hot coolant for the heater, A/C compressor operation and to assure that the actuators are calibrated correctly. The HVAC control module is capable of troubleshooting the system in approximately 120 seconds. If a condition is detected, an error code is displayed. The error code cannot be erased until the condition is repaired and the diagnostic test is preformed. Check wire before replacing components, Refer to Wiring diagrams
CAUTION: Do not remove the actuators from the Heater-A/C unit assembly with power applied. Removal should only be done with the Ignition OFF. The actuators have no mechanical stops to limit the travel. If the actuator rotates and is not connected to the unit assembly, it will become out of calibration.
ACTUATOR CALIBRATION
Mode, Blend and Zone (if equipped) door calibration compensates for mechanical variations in the actuators, HVAC control module and its linkages. In-vehicle calibration can be entered from the control's front panel. If the REAR WIPE and INTERMITTENT LED's flash simultaneously when Ignition is cycled ON, the actuators have not been calibrated or during the previous calibration a failure occurred Radio Bezel and HVAC Control and Radio Bezel and HVAC Control, Rear Blower Motor Switch and Zone Control Diagnostics will always occur during Calibration Diagnostic and Cooldown test.
DIAGNOSTICS
During the Actuator calibration, diagnostics are performed on the actuators and evaporator temperature Fin Sensor. Once diagnostics are completed the REAR WIPER and INTERMITTENT LED's will flash to indicate either a successful calibration or the appropriate fail code(s) At this time manual testing of the Blend, Mode and Driver (if equipped) potentiometers can be performed. If a failure is detected during Diagnostics a fault will be set in the control. When Ignition is cycled OFF and then ON or Diagnostics is aborted, the REAR WIPER and INTERMITTENT LED's will flash simultaneously showing that a failure has occurred. The control will not indicate the fail code, but only that a failure had occurred during the last diagnostics test. The only way to clear the failure codes is repeat the Calibration Diagnostic and Cooldown test, after all repairs are completed.
COOLDOWN TEST
This test has been designed for performance testing of the A/C system at the manufacturing facility. If the HVAC control module is replaced, the Cooldown test will occur during Calibration test. Cooldown will not occur on Heater Only units. During the Cooldown test the control will monitor the temperature of the Fin Sensor. The A/C system must be able to bring the evaporator temperature down to predetermined minimum temperature in less than 2 minutes.
CALIBRATION/COOLDOWN LED DISPLAY CODES
See chart for definition of LED's. If no problems are found, the control functions normally.
LED'S PASS/FAIL CORRECTIVE ACTION
NO LED'S FLASHING-NORMAL OPERATION PASSED CALIBRATION, DIAGNOSTICS AND COOLDOWN NONE
REAR WIPER AND INTERMITTENT LED'S FLASH SIMULTANEOUSLY FAILED CALIBRATION DIAGNOSTICS RUN CALIBRATION TEST
A/C AND RECIRC LED'S FLASH SIMULTANEOUSLY FAILED COOLDOWN RUN COOLDOWN TEST
REAR WIPER AND INTERMITTENT LED'S ARE FLASHING SIMULTANEOUSLY A/C AND RECIRC LED'S ARE FLASHING SIMULTANEOUSLY FAILED CALIBRATION, DIAGNOSTICS AND FAILED COOLDOWN TEST RUN CALIBRATION TEST
CALIBRATION/DIAGNOSTICS TEST ENTRY
TO INITIATE TESTS:
Set Blower motor ON HIGH
Set Mode position to Panel
Set Temperature to Cold (Both slide pots if equipped)
Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light)
RESULTS:
All LED's will turn on for 5 Seconds
Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cooldown test is running if A/C and RECIRC are alternately flashing.
Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.
After all tests have passed, Calibration Diagnostics and Cooldown can be run separately.
COOLDOWN TEST ENTRY
TO INITIATE TESTS:
Set Blower motor ON HIGH
Set Mode position to Panel
Set Temperature to Cold (Both slide pots if equipped)
Depress WASH and A/C simultaneously for 5 Seconds
NOTE: If the evaporator is already cold, operate system with A/C OFF and the blower motor ON high for three minutes prior to starting test.
RESULTS:
All LED's will turn on for 5 Seconds (Until all LED's light)
Cooldown Test is running when A/C and RECIRC. are alternately flashing. If A/C and RECIRC. are flashing simultaneously, Cooldown has failed. Make sure that the Blower motor is ON high, and temperature is ON full Cold, abort test and repeat Calibration Diagnostic and Cooldown test again.
Calibration Test is running when REAR WIPER and INTERMITTENT LED's are alternately flashing.
After all tests have passed, Cooldown test can be run separately.
Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.
CALIBRATION DIAGNOSTICS AND COOLDOWN ABORT
Test can be aborted by doing one of the following:
Depressing Rear Window Defogger, RECIRC and Rear Wiper buttons.
Cycling Ignition OFF and then ON.
Control will automatically abort after 15 minutes from the time Calibration Diagnostics and Cooldown was entered.
The HVAC control module will return to normal operation or may indicate unsuccessful Calibration Diagnostics or Cooldown test by LED's flashing simultaneously.
EEPROM DATA
Calibration Diagnostics, Cooldown Status and evaporator temperature Fin Sensor values are stored in an EEPROM memory internal to the control. The microcomputer within the HVAC control module uses this information:
To determine if Cooldown needs to run
For proper position of the Heater-A/C unit assembly doors
ACTUATOR CALIBRATION AND DIAGNOSTICS
NOTE: Do not run actuators unless they are properly mounted on the HVAC control module.
Actuator end point calibration takes approximately 60 seconds. The REAR WIPER and INTERMITTENT LED's will flash alternately during the test. The control will cycle the Blend actuator(s) to the Heat stop first then back to Cold. After the Blend actuator(s) have been calibrated the Mode actuator will be cycled to Defrost and then to Panel. Successful calibration is defined as actuator travel falling within their minimum and maximum limits.
BLEND/PASSENGER ACTUATOR BACKGROUND
The Blend/Passenger Actuator can move the temperature door in two directions. When the voltage at pin 12 of the control module is high, about 11.5V, and the voltage at pin 17 is low, about 1.5V, the door will move towards the Heat position. When pin 17 is High and pin 12 is Low the door will move towards the Cold position. When both pins are high or both pins are low, the actuator will not move. The Blend/Passenger feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.0 volts in the Heat position and 1.0 volt in the Cold position. As the position of the Blend/Passenger actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the temperature door.
DRIVER ACTUATOR BACKGROUND
The Driver Actuator can move the temperature door in two directions. When the voltage at pin 15 of the control module is high, about 11.5V, and the voltage at pin 13 is low, about 1.5V the door will move towards the Cold position. When pin 13 is High and pin 15 is Low the door will move towards the Heat position. When both pins are high or when both pins are low, the actuator will not move. The Driver feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.0 volts in the Heat position and 1.0 volt in the Cold position. As the position of the Driver Actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the temperature door.
MODE ACTUATOR BACKGROUND
The Mode actuator can move the mode door in two directions. When the voltage at pin 18 of the control module is high, about 11.5V, and the voltage at pin 12 is low, about 1.5V the door will move towards the Panel position. When pin 12 is High and pin 18 is Low the door will move towards the Defrost position. When both pins are high or when both pins are low, the actuator will not move. The Mode door feedback signal is a voltage signal that is supplied by the actuator to the control. The signal will be about 4.5 volts in the Panel position and.5 volts in the Defrost position. As the position of the Mode actuator changes, so will the feedback signal. The feedback signal is necessary for the correct positioning of the mode door.
FAIL CODES/LEVEL DISPLAY
Fail Codes/Level are displayed using the REAR WIPER and INTERMITTENT LED's flashing in the sequence indicated below. The REAR WIPER LED represents the Level and the INTERMITTENT LED represents the Value. After Calibration/Diagnostics is completed, the control will begin flashing Level 1 codes. Depressing the WASH button will cycle to Level 2, depressing WASH again will cycle to Level 3. Each time the WASH button is depressed will cycle to the next level. After Level 5 is reached, you will cycle back to Level 1. If the Control is a Heater Only you will only cycle from Levels 1 to 3.
LEVEL DISPLAY
1 FAIL CODES
2 MODE POTENTIOMETER TEST
3 BLEND/PASS. POTENTIOMETER TEST
4 EVAPORATOR TEMPERATURE FIN SENSOR (A/C AND ZONE UNITS ONLY)
5 DRIVER POTENTIOMETER (ZONE UNITS ONLY)
CODE DEFINITION
0 PASSED ALL TESTS
1 MODE ACTUATOR DID NOT REACH DEFROST POSITION
2 MODE ACTUATOR DID NOT REACH PANEL POSITION
3 BLEND/PASS. ACTUATOR DID NOT REACH COLD STOP
4 BLEND PASS. ACTUATOR DID NOT REACH HEAT STOP
5 EVAPORATOR TEMPERATURE FIN SENSOR OPEN
6 EVAPORATOR TEMPERATURE FIN SENSOR SHORTED
7 DRIVER ACTUATOR DID NOT REACH COLD STOP
8 ZONE/DRIVER ACTUATOR DID NOT REACH HEAT STOP
9 CONTROL HEAD INTERNAL FAILURE
TEMPERATURE AND MODE POTENTIOMETER DIAGNOSTICS
The Temperature and Mode Potentiometer can be tested after calibration is complete by pressing the WASH button and cycling to Levels 2, 3 or 5 as displayed by the REAR WIPER LED. On Heater Only units you can only cycle to Levels 2 and 3. In each individual test the INTERMITTENT LED flash rate will change as the Temperature or Mode potentiometer is moved from one end to the other, see Potentiometer vs. Position and Flash Rate table.
POTENTIOMETER INTERMITTENT LED FASTER FLASH RATE INTERMITTENT LED SLOWER FLASH RATE
MODE PANEL DEFROST
BLEND/PASS. HEAT COLD
DRIVER HEAT COLD
EVAPORATOR TEMPERATURE FIN SENSOR TEMPERATURE DIAGNOSTICS
The evaporator temperature Fin Sensor can be tested by using the INTERMITTENT LED to display the actual temperature the sensor is reading. The HVAC control module can only display temperatures from 1 to 99 degrees. To read the temperature, perform the following:
Set Blower motor to any speed other than OFF
Set A/C to ON, if A/C Clutch does not engage make sure Fail Codes 5 and 6 are cleared.
Run Diagnostics (Depress REAR WIPER and REAR WASH)
When Diagnostics is complete, Cycle to Level 4.
To clear the error code 5 and 6 the evaporator temperature Fin sensor and/or the wiring repair needs to be completed. The Calibration Diagnostic Cooldown test ran, then press and hold the intermittent button for 5 seconds.
Display Sequence is as follows:
REAR WIPER LED will display the Level
INTERMITTENT LED will display ten's digit
Short Pause
INTERMITTENT LED will display the one's digit.
The HVAC control module will continue to cycle the Level and then Temperature until the level is changed or Calibration Diagnostics and Cooldown test is exited. If a condition is detected, the control will not return to normal operation until the condition is repaired, and the Calibration Diagnostic and Cooldown test is repeated.
Trending Topics
#8
04-08-2005, 01:40 AM
#9
11-27-2006, 02:10 AM
RE: Caravan Help Needed
Seems as if I have a semi-relative problem. Yesterday, my wife was cleaning out the van (1997 Dodge Grand Caravan Sport). She had all of the doors open for about 2 hours, I suppose the lights ran down the battery. She called me because with the ignition key was off and a ticking sound was coming from behind the dash. The first thing I did was turn the key to start the van. No, click or anything, other than the click sounds she was talking about. Jumpstarted the van. All was fine, next morning, dead battery again. Jumpstarted the van, its been fine for the rest of the day. At this point, this is the only time I noticed the rear wiper and the intermitten rear wiper LED were flashing at a consistent rate which was non-stop. I bought a new battery just to eliminate the possibility, installed the battery. It was about 2 minutes between battery changes because I wanted to clean the battery terminals. So, it appears Im here to learn more about the 2 little blinking LEDs myself. Oh, I read the related procedures and all....but, it seams that all my actuators, heat selector, a/c selectors, zone control, ect....are all working just fine...although the LEDs for the zone control, a/c, and elemental widow defroster will not illuminate. .....whats up with that?
#10
12-02-2008, 11:18 PM
Hi All - not sure if my experience will help but I got a good result, finally...
My symptoms were that the heat slide and zone **** did nothing. I tried to run the diagnostics and got lots of different codes. It took me several hours to figure it all out because it was so new to me.
In the end, that was fun and entertaining but in my case a distraction because I eventually discovered that the circuit board that controls all that stuff was fried. Short story is that I went to the wrecker and bought a new one for $65 plus tax, and my heat was back after that.
Longer story is that it took a careful look with a bright white light to see that the circuit board was actually the problem. I eventually saw where the circuit was burned just a bit and thought I would try a replacement. I'm so happy it worked because I didn't want to try to take any more stuff apart and deal with relays, fuses, actuators, etc.
My symptoms were that the heat slide and zone **** did nothing. I tried to run the diagnostics and got lots of different codes. It took me several hours to figure it all out because it was so new to me.
In the end, that was fun and entertaining but in my case a distraction because I eventually discovered that the circuit board that controls all that stuff was fried. Short story is that I went to the wrecker and bought a new one for $65 plus tax, and my heat was back after that.
Longer story is that it took a careful look with a bright white light to see that the circuit board was actually the problem. I eventually saw where the circuit was burned just a bit and thought I would try a replacement. I'm so happy it worked because I didn't want to try to take any more stuff apart and deal with relays, fuses, actuators, etc.