need help
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need help
got a 09 avenger and it has a p2441 engine code just wondering if it has anything to with wire harness cause had new wire harness put on and check engine light wasnt on before can anyone help me thanks!
Welcome to DF
P2441-AIR PUMP SWITCH VALVE STUCK CLOSED
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
For 20 seconds following a vehicle cold start, the air injection system delivers a controlled amount of outside air into the exhaust system, upstream of the catalytic converters, in order to help reduce hydrocarbon and carbon monoxide gas emissions.
When Monitored:
After the diagnostics for Airflow Sensor Rationality (P2431) has passed, while the Secondary Air Pump Relay control is active. ECT above 0 C (32 F), ambient air temperature within approximately 2 degrees of ECT, and Secondary Airflow diagnostic counter above 100 (approximately 3.0 seconds).
Set Condition:
During monitoring, the measured secondary airflow threshold is less than a calibrated value (approximately 6 kg/h) and the difference between minimum and maximum airflow is greater than a calibrated value (approximately 3.5 kg/h).
Possible Causes
OBSTRUCTION OR LEAK IN THE SECONDARY AIR SYSTEM
(A929) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
(Z931) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(A161) SECONDARY AIR PUMP CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
(K157) SAF SIGNAL CIRCUIT SHORT TO VOLTAGE
(K157) SAF SIGNAL CIRCUIT SHORT TO GROUND
(K157) SAF SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K957) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
SECONDARY AIR PUMP RELAY
AIRFLOW SENSOR
SECONDARY AIR CHECK VALVE
SECONDARY AIR PUMP
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
1.DTC IS ACTIVE
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
NOTE: Diagnose and repair any Secondary Air system sensor signal or relay control circuit DTCs before proceeding with this procedure.
1. Turn the ignition on.
2. With the scan tool, select View DTCs and review the DTC environmental data for this DTC.
Is the good trip counter greater than 0?
Yes
Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 2
2.AIR INJECTION SYSTEM COMPONENT INSPECTION
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
1. Turn the ignition off.
2. Inspect the Secondary Air Pump Airflow Sensor, the Secondary Air Pump Assembly, the Secondary Air Pump Valve and the connection tubes between them.
3. Look for damage, obstructions, leaks, or any condition that would obstruct or interfere with airflow between the components.
4. Using the wiring diagram/schematic as a guide, inspect the wiring and electrical connectors at the Secondary Air Pump Airflow Sensor, Secondary Air Pump Relay, and the Secondary Air Pump Assembly.
5. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
Were any problems found?
Yes
Repair as necessary.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 3
3.SECONDARY AIR PUMP ACTUATION
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. With the scan tool, actuate the Secondary Air Pump Relay control to on.
3. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 4
4.SECONDARY AIR CHECK VALVE
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
1. Turn the ignition off.
2. Disconnect the air pump outlet tube (3) from the secondary air check valve (1).
3. Turn the ignition on.
4. With the scan tool, actuate the Secondary Air Pump Relay control to on.
5. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Replace the Secondary Air Check Valve in accordance with the Service Information.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 5
5.(Z931) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Secondary Air Pump connector.
3. Using a 12-volt test light connected to 12 volts, check the (Z931) Ground circuit in the Secondary Air Pump harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 6
No
Repair the (Z931) Ground circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
6.SECONDARY AIR PUMP CONTROL OUTPUT
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. With the scan tool, actuate the Secondary Air Pump Relay control to on.
3. Using a 12-volt test light connected to ground, check the (A161) Secondary Air Pump Relay Output circuit in the Secondary Air Pump harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 7
No
Go To 16
7.(F343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Airflow Sensor connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (F343) Fused Main Relay Output circuit in the Airflow Sensor harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 8
No
Repair the (F343) Fused Main Relay Output circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
8.(K157) SAF SIGNAL CIRCUIT VOLTAGE
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. Measure the voltage of the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is the voltage between 4.8 and 50.1 of a volt?
Yes
Go To 9
No
Go To 12
9.(K957) SENSOR GROUND CIRCUIT TEST
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Using a 12-volt test light connected to 12 volts, check the (K957) Sensor Ground circuit in the Airflow Sensor harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 10
No
Go To 14
10.AIRFLOW SENSOR WIRING AND CONNECTORS
--------------------------------------------------------------------------------
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Airflow Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Technical Service Bulletins that may apply.
Were any problems found?
Yes
Repair as necessary.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 11
11.AIRFLOW SENSOR
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Replace the Airflow Sensor.
3. Verify that all Secondary Air Pump Assembly wiring, connectors, tubes, and hoses are connected properly.
4. Turn the ignition on.
5. With the scan tool, actuate the Secondary Air Pump Relay control to on.
6. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Test Complete.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 19
12.(K157) SAF SIGNAL CIRCUIT SHORTED TO VOLTAGE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is there any voltage present?
Yes
Repair the (K157) SAF Signal circuit for a short to voltage.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 13
13.(K157) SAF SIGNAL CIRCUIT SHORTED TO GROUND
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Measure the resistance between ground and the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is the resistance above 100 Ohms?
Yes
Go To 14
No
Repair the (K157) SAF Signal circuit for a short to ground.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
14.(K157) SAF SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
1. Measure the resistance of the (K157) SAF Signal circuit between the Airflow Sensor harness connector and the PCM.
Is the resistance below 5.0 Ohms?
Yes
Go To 20
No
Repair the (K157) SAF Signal circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
15.(K957) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
1. Measure the resistance of the (K957) Sensor Ground circuit between the Airflow Sensor harness connector and the PCM.
Is the resistance below 5.0 Ohms?
Yes
Go To 20
No
Repair the (K957) Sensor Ground for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
16.(A161) SECONDARY AIR PUMP CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Remove the Secondary Air Pump Relay.
3. Measure the resistance of the (A161) Secondary Air Pump Relay Output circuit between the Secondary Air Pump Relay connector and the Secondary Air Pump harness connector.
Is the resistance below 5.0 Ohms?
Yes
Go To 17
No
Repair the (A161) Secondary Air Pump Relay Output circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
17.(A929) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (A929) Fused B+ circuit in the Secondary Air Pump Relay connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Replace the Secondary Air Pump Relay.
Perform the PCM VERIFICATION TEST.
No
Repair the (A929) Fused B+ circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
P2441-AIR PUMP SWITCH VALVE STUCK CLOSED
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
For 20 seconds following a vehicle cold start, the air injection system delivers a controlled amount of outside air into the exhaust system, upstream of the catalytic converters, in order to help reduce hydrocarbon and carbon monoxide gas emissions.
When Monitored:
After the diagnostics for Airflow Sensor Rationality (P2431) has passed, while the Secondary Air Pump Relay control is active. ECT above 0 C (32 F), ambient air temperature within approximately 2 degrees of ECT, and Secondary Airflow diagnostic counter above 100 (approximately 3.0 seconds).
Set Condition:
During monitoring, the measured secondary airflow threshold is less than a calibrated value (approximately 6 kg/h) and the difference between minimum and maximum airflow is greater than a calibrated value (approximately 3.5 kg/h).
Possible Causes
OBSTRUCTION OR LEAK IN THE SECONDARY AIR SYSTEM
(A929) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
(Z931) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(A161) SECONDARY AIR PUMP CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
(K157) SAF SIGNAL CIRCUIT SHORT TO VOLTAGE
(K157) SAF SIGNAL CIRCUIT SHORT TO GROUND
(K157) SAF SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K957) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
SECONDARY AIR PUMP RELAY
AIRFLOW SENSOR
SECONDARY AIR CHECK VALVE
SECONDARY AIR PUMP
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
1.DTC IS ACTIVE
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
NOTE: Diagnose and repair any Secondary Air system sensor signal or relay control circuit DTCs before proceeding with this procedure.
1. Turn the ignition on.
2. With the scan tool, select View DTCs and review the DTC environmental data for this DTC.
Is the good trip counter greater than 0?
Yes
Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 2
2.AIR INJECTION SYSTEM COMPONENT INSPECTION
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
1. Turn the ignition off.
2. Inspect the Secondary Air Pump Airflow Sensor, the Secondary Air Pump Assembly, the Secondary Air Pump Valve and the connection tubes between them.
3. Look for damage, obstructions, leaks, or any condition that would obstruct or interfere with airflow between the components.
4. Using the wiring diagram/schematic as a guide, inspect the wiring and electrical connectors at the Secondary Air Pump Airflow Sensor, Secondary Air Pump Relay, and the Secondary Air Pump Assembly.
5. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
Were any problems found?
Yes
Repair as necessary.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 3
3.SECONDARY AIR PUMP ACTUATION
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. With the scan tool, actuate the Secondary Air Pump Relay control to on.
3. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 4
4.SECONDARY AIR CHECK VALVE
--------------------------------------------------------------------------------
WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
1. Turn the ignition off.
2. Disconnect the air pump outlet tube (3) from the secondary air check valve (1).
3. Turn the ignition on.
4. With the scan tool, actuate the Secondary Air Pump Relay control to on.
5. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Replace the Secondary Air Check Valve in accordance with the Service Information.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 5
5.(Z931) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Secondary Air Pump connector.
3. Using a 12-volt test light connected to 12 volts, check the (Z931) Ground circuit in the Secondary Air Pump harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 6
No
Repair the (Z931) Ground circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
6.SECONDARY AIR PUMP CONTROL OUTPUT
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. With the scan tool, actuate the Secondary Air Pump Relay control to on.
3. Using a 12-volt test light connected to ground, check the (A161) Secondary Air Pump Relay Output circuit in the Secondary Air Pump harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 7
No
Go To 16
7.(F343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Airflow Sensor connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, check the (F343) Fused Main Relay Output circuit in the Airflow Sensor harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 8
No
Repair the (F343) Fused Main Relay Output circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
8.(K157) SAF SIGNAL CIRCUIT VOLTAGE
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. Measure the voltage of the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is the voltage between 4.8 and 50.1 of a volt?
Yes
Go To 9
No
Go To 12
9.(K957) SENSOR GROUND CIRCUIT TEST
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Using a 12-volt test light connected to 12 volts, check the (K957) Sensor Ground circuit in the Airflow Sensor harness connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Go To 10
No
Go To 14
10.AIRFLOW SENSOR WIRING AND CONNECTORS
--------------------------------------------------------------------------------
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Airflow Sensor and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Technical Service Bulletins that may apply.
Were any problems found?
Yes
Repair as necessary.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 11
11.AIRFLOW SENSOR
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Replace the Airflow Sensor.
3. Verify that all Secondary Air Pump Assembly wiring, connectors, tubes, and hoses are connected properly.
4. Turn the ignition on.
5. With the scan tool, actuate the Secondary Air Pump Relay control to on.
6. With the scan tool, monitor the Secondary Air MAF Sensor value.
CAUTION: Do not allow the Air Pump actuation to run for more than 30 seconds at a time. Pump damage may occur. Allow the pump to cool down for at least 10 minutes between actuations.
Is the Secondary Air MAF Sensor value greater than 25 kg/h with the pump actuated on?
Yes
Test Complete.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 19
12.(K157) SAF SIGNAL CIRCUIT SHORTED TO VOLTAGE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Turn the ignition on.
4. Measure the voltage of the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is there any voltage present?
Yes
Repair the (K157) SAF Signal circuit for a short to voltage.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
Go To 13
13.(K157) SAF SIGNAL CIRCUIT SHORTED TO GROUND
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Measure the resistance between ground and the (K157) SAF Signal circuit in the Airflow Sensor harness connector.
Is the resistance above 100 Ohms?
Yes
Go To 14
No
Repair the (K157) SAF Signal circuit for a short to ground.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
14.(K157) SAF SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
1. Measure the resistance of the (K157) SAF Signal circuit between the Airflow Sensor harness connector and the PCM.
Is the resistance below 5.0 Ohms?
Yes
Go To 20
No
Repair the (K157) SAF Signal circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
15.(K957) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
1. Measure the resistance of the (K957) Sensor Ground circuit between the Airflow Sensor harness connector and the PCM.
Is the resistance below 5.0 Ohms?
Yes
Go To 20
No
Repair the (K957) Sensor Ground for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
16.(A161) SECONDARY AIR PUMP CONTROL OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition off.
2. Remove the Secondary Air Pump Relay.
3. Measure the resistance of the (A161) Secondary Air Pump Relay Output circuit between the Secondary Air Pump Relay connector and the Secondary Air Pump harness connector.
Is the resistance below 5.0 Ohms?
Yes
Go To 17
No
Repair the (A161) Secondary Air Pump Relay Output circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
17.(A929) FUSED B+ CIRCUIT OPEN OR HIGH RESISTANCE
--------------------------------------------------------------------------------
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (A929) Fused B+ circuit in the Secondary Air Pump Relay connector.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
Replace the Secondary Air Pump Relay.
Perform the PCM VERIFICATION TEST.
No
Repair the (A929) Fused B+ circuit for an open circuit or high resistance.
Perform the PCM VERIFICATION TEST.
