door switches
Veteran
Joined: Apr 2009
Posts: 251
Likes: 1
Here is a description...
DESCRIPTION
This vehicle has up to four door ajar switches, one for each door. Each switch is concealed within and integral to its respective door latch unit. The switches are momentary leaf contact-type units that are actuated by the mechanisms internal to the door latch. A short pigtail wire and connector on each door latch connects the door ajar switch to the vehicle electrical system through its respective door wire harness.
OPERATION
The door ajar switches are actuated by the mechanisms internal to the door latch. When a door is closed and properly latched, its door ajar switch is an open circuit. When a door is open or only partially latched, the door ajar switch is a closed circuit. The door ajar switches are hard wired in series between a body ground and the Totally Integrated Power Module (TIPM).
The TIPM reads the hard wired door ajar switch inputs through internal pull-ups, then uses these inputs to control many electronic functions and features of the vehicle. The TIPM also sends the proper electronic door ajar switch status messages to other electronic modules in the vehicle over the Controller Area Network (CAN) data bus.
The door ajar switches as well as the hard wired inputs and outputs of the switches may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls or communication between modules related to door ajar switch operation. The most reliable, efficient and accurate means to diagnose the door ajar switches requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
DESCRIPTION
This vehicle has up to four door ajar switches, one for each door. Each switch is concealed within and integral to its respective door latch unit. The switches are momentary leaf contact-type units that are actuated by the mechanisms internal to the door latch. A short pigtail wire and connector on each door latch connects the door ajar switch to the vehicle electrical system through its respective door wire harness.
OPERATION
The door ajar switches are actuated by the mechanisms internal to the door latch. When a door is closed and properly latched, its door ajar switch is an open circuit. When a door is open or only partially latched, the door ajar switch is a closed circuit. The door ajar switches are hard wired in series between a body ground and the Totally Integrated Power Module (TIPM).
The TIPM reads the hard wired door ajar switch inputs through internal pull-ups, then uses these inputs to control many electronic functions and features of the vehicle. The TIPM also sends the proper electronic door ajar switch status messages to other electronic modules in the vehicle over the Controller Area Network (CAN) data bus.
The door ajar switches as well as the hard wired inputs and outputs of the switches may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the electronic controls or communication between modules related to door ajar switch operation. The most reliable, efficient and accurate means to diagnose the door ajar switches requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
Thread Starter
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Champion
Joined: Dec 2007
Posts: 3,563
Likes: 0
From: Ontario, Canada
Now that was informative but I just wanna know how to shut the light off when I have the door open without disconnecting battery. Like I used to stick a piece of wood or something in the jamb to close the switch so I wonder if I just trip the mechanism would it turn off the light and fake the truck into thinking it is closed?
Veteran
Joined: Apr 2009
Posts: 251
Likes: 1
The interior lights will shut off automatically after 10 minutes to save the battery....here is that info...
COURTESY LAMP CIRCUIT
Depending upon the selected vehicle options, the courtesy lamp circuit may include the dome and dome/reading lamps located in the headliner near the windshield as well as between the front and rear seating, the cargo lamps located near the center of the rear roof header, the glove box lamp in the upper glove box bin in the instrument panel, and the vanity lamps located in the sun visors. The lamps in the courtesy lamp circuit are provided with a path to ground at all times. The ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) controls the output of battery voltage for the courtesy lamps in this circuit based upon hard wired inputs from the headlamp switch and electronic message inputs from the ignition switch (also known as the Wireless Ignition Node/WIN) and the TIPM.
After all of the ajar switch inputs to the TIPM transition to open and the EMIC receives the appropriate electronic door ajar switch status messages from the TIPM over the Controller Area Network (CAN) data bus, the EMIC will keep the courtesy lamps illuminated for about 30 seconds, then fade the lamps to OFF (theater dimming) over about 3 seconds. The EMIC also provides courtesy lamp operation based upon a resistor multiplexed input from the interior lighting thumbwheel on the headlamp switch, and provides an Illuminated Entry feature in response to certain electronic ignition switch status message inputs received from the WIN and the Occupant Restraint Controller (ORC) over the CAN data bus. A resistor multiplexed courtesy lamp DEFEAT input from the interior lighting thumbwheel of the headlamp switch will cause the EMIC to override normal courtesy lamp operation.
The EMIC provides a battery saver (load shedding) feature for all courtesy lamps, which will automatically turn these lamps OFF if they are left ON for more than about 10 minutes after the electronic ignition switch status message transitions to OFF, or about 15 minutes in the case of the cargo lamps.
COURTESY LAMP CIRCUIT
Depending upon the selected vehicle options, the courtesy lamp circuit may include the dome and dome/reading lamps located in the headliner near the windshield as well as between the front and rear seating, the cargo lamps located near the center of the rear roof header, the glove box lamp in the upper glove box bin in the instrument panel, and the vanity lamps located in the sun visors. The lamps in the courtesy lamp circuit are provided with a path to ground at all times. The ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) controls the output of battery voltage for the courtesy lamps in this circuit based upon hard wired inputs from the headlamp switch and electronic message inputs from the ignition switch (also known as the Wireless Ignition Node/WIN) and the TIPM.
After all of the ajar switch inputs to the TIPM transition to open and the EMIC receives the appropriate electronic door ajar switch status messages from the TIPM over the Controller Area Network (CAN) data bus, the EMIC will keep the courtesy lamps illuminated for about 30 seconds, then fade the lamps to OFF (theater dimming) over about 3 seconds. The EMIC also provides courtesy lamp operation based upon a resistor multiplexed input from the interior lighting thumbwheel on the headlamp switch, and provides an Illuminated Entry feature in response to certain electronic ignition switch status message inputs received from the WIN and the Occupant Restraint Controller (ORC) over the CAN data bus. A resistor multiplexed courtesy lamp DEFEAT input from the interior lighting thumbwheel of the headlamp switch will cause the EMIC to override normal courtesy lamp operation.
The EMIC provides a battery saver (load shedding) feature for all courtesy lamps, which will automatically turn these lamps OFF if they are left ON for more than about 10 minutes after the electronic ignition switch status message transitions to OFF, or about 15 minutes in the case of the cargo lamps.
Thread Starter
|
Champion
Joined: Dec 2007
Posts: 3,563
Likes: 0
From: Ontario, Canada
The interior lights will shut off automatically after 10 minutes to save the battery....here is that info...
COURTESY LAMP CIRCUIT
Depending upon the selected vehicle options, the courtesy lamp circuit may include the dome and dome/reading lamps located in the headliner near the windshield as well as between the front and rear seating, the cargo lamps located near the center of the rear roof header, the glove box lamp in the upper glove box bin in the instrument panel, and the vanity lamps located in the sun visors. The lamps in the courtesy lamp circuit are provided with a path to ground at all times. The ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) controls the output of battery voltage for the courtesy lamps in this circuit based upon hard wired inputs from the headlamp switch and electronic message inputs from the ignition switch (also known as the Wireless Ignition Node/WIN) and the TIPM.
After all of the ajar switch inputs to the TIPM transition to open and the EMIC receives the appropriate electronic door ajar switch status messages from the TIPM over the Controller Area Network (CAN) data bus, the EMIC will keep the courtesy lamps illuminated for about 30 seconds, then fade the lamps to OFF (theater dimming) over about 3 seconds. The EMIC also provides courtesy lamp operation based upon a resistor multiplexed input from the interior lighting thumbwheel on the headlamp switch, and provides an Illuminated Entry feature in response to certain electronic ignition switch status message inputs received from the WIN and the Occupant Restraint Controller (ORC) over the CAN data bus. A resistor multiplexed courtesy lamp DEFEAT input from the interior lighting thumbwheel of the headlamp switch will cause the EMIC to override normal courtesy lamp operation.
The EMIC provides a battery saver (load shedding) feature for all courtesy lamps, which will automatically turn these lamps OFF if they are left ON for more than about 10 minutes after the electronic ignition switch status message transitions to OFF, or about 15 minutes in the case of the cargo lamps.
COURTESY LAMP CIRCUIT
Depending upon the selected vehicle options, the courtesy lamp circuit may include the dome and dome/reading lamps located in the headliner near the windshield as well as between the front and rear seating, the cargo lamps located near the center of the rear roof header, the glove box lamp in the upper glove box bin in the instrument panel, and the vanity lamps located in the sun visors. The lamps in the courtesy lamp circuit are provided with a path to ground at all times. The ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN) controls the output of battery voltage for the courtesy lamps in this circuit based upon hard wired inputs from the headlamp switch and electronic message inputs from the ignition switch (also known as the Wireless Ignition Node/WIN) and the TIPM.
After all of the ajar switch inputs to the TIPM transition to open and the EMIC receives the appropriate electronic door ajar switch status messages from the TIPM over the Controller Area Network (CAN) data bus, the EMIC will keep the courtesy lamps illuminated for about 30 seconds, then fade the lamps to OFF (theater dimming) over about 3 seconds. The EMIC also provides courtesy lamp operation based upon a resistor multiplexed input from the interior lighting thumbwheel on the headlamp switch, and provides an Illuminated Entry feature in response to certain electronic ignition switch status message inputs received from the WIN and the Occupant Restraint Controller (ORC) over the CAN data bus. A resistor multiplexed courtesy lamp DEFEAT input from the interior lighting thumbwheel of the headlamp switch will cause the EMIC to override normal courtesy lamp operation.
The EMIC provides a battery saver (load shedding) feature for all courtesy lamps, which will automatically turn these lamps OFF if they are left ON for more than about 10 minutes after the electronic ignition switch status message transitions to OFF, or about 15 minutes in the case of the cargo lamps.
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Record Breaker
Joined: Apr 2010
Posts: 1,387
Likes: 1
From: MN
Interestingly, the 10 minute time-out sounds suspiciously like what is happening to the ext. mirror 'puddle lights' after the doors have been opened and closed with no key in the ignition. I timed it the other night and they stayed on for 10 min. and then went out. It's almost like they are erroneously coming on, or they are missing some other, shorter timer. Having them intentionally stay on for 10 minutes after a door open/close seems out of character.
Rob
Rob