Ignition System - Electrical Diagnostics: Other Dodge Durango II facelift

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: The Front Control Module will set this DTC if the CAN bus message and the hardwired ignition switch circuit do not match the position of the ignition switch.

Possible Causes

Scheme 5

Scheme 6

Scheme 7

1. 1) CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go to 2) . No If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. 2) INSPECT JUNCTION BLOCK FUSE #18 Turn the ignition off. Remove and inspect Junction Block Fuse #18. Is the fuse open? Yes Replace fuse and retest. If fuse continues to fail inspect the wiring between the Junction Block and the Front Control Module for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) (F941) IGNITION SWITCH OUTPUT CIRCUIT OPEN Turn the ignition on. Measure the voltage of the (F941) Ignition Switch Output circuit at the fuse input terminal. Is the voltage above 10.0 volts? Yes Go to 4) . No Repair the (F941) Ignition Switch Output circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) (F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN Turn the ignition off. Install Fuse #18 in the Junction Block. Remove the FCM from the IPM. Turn the ignition on. Measure the voltage of the (F202) Fused Ignition Switch output circuit. Is the voltage above 10.0 volts? Yes Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Front Control Module in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (F202) Fused Ignition Switch Output circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 8

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module will set this DTC within 500 ms if the (F1) fused ignition switch output circuit voltage is less than the expected value.

1. When Monitored: With the ignition on or off and with the FCM awake.

1. Set Condition: The Front Control Module will set this DTC within 2 seconds if the ignition unlock run/start circuit voltage is not what the expected value should be.

The (F942) Fused Ignition Switch Output circuit supplies the FCM with battery power. The FCM processes the input and sends it out as the (F1) Fused Ignition Switch Output circuit to the Shift Lever assembly (3.7L) or the PCM (except 3.7L).

Scheme 9

Scheme 10

Scheme 11

1. 1) CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 10 seconds then turn the ignition off. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go to 2) . No If the DTC is stored, check for an intermittent condition. Using the wiring diagram/schematic as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. 2) (F1) FUSED IGNITION SWITCH OUTPUT (RUN START) CIRCUIT SHORTED TO VOLTAGE Disconnect the Powertrain Control Module C1 harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Cycle the ignition switch from off to on then back to off. NOTE: The ignition switch must be in the off position when performing the following step. Using a 12-volt test light connected to ground, check the (F1) Fused Ignition Switch Output (Run Start) circuit. Does the test light illuminate brightly? Yes Repair the (F1) Fused Ignition Switch Output (Run Start) circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) POWERTRAIN CONTROL MODULE Turn the ignition on. With the test light still connected from the previous step, check the (F1) Fused Ignition Switch Output (Run Start) circuit. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Does the test light illuminate brightly? Yes Replace the Powertrain Control Module in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) (F1) FUSED IGNITION SWITCH OUTPUT (RUN START) CIRCUIT OPEN Turn the ignition off. Remove the FCM from the Integrated Power Module. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis. Measure the resistance of the (F1) Fused Ignition Switch Output (Run Start) circuit between the Powertrain Control Module C1 connector and the FCM-IPM connector. Is the resistance below 5.0 ohms? Yes Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Front Control Module in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (F1) Fused Ignition Switch Output (Run Start) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 12

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module will set this DTC within 500 ms if the (P305) Accessory Delay Relay Control circuit is open or shorted to ground.

Scheme 13

Scheme 14

1. 1) CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go to 2) . No If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. 2) ACCESSORY DELAY RELAY Turn the ignition off. NOTE: Check the PDC fuses before continuing. Install a substitute relay in place of the original Accessory Delay Relay. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds. With the scan tool, read the active FCM DTC's. Does the scan tool display this DTC as active? Yes Go to 3) . No Replace the original Accessory Delay Relay. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
3. 3) (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT OPEN Turn the ignition off. Remove the FCM from the Integrated Power Module. Remove the Accessory Delay Relay from the Junction Block. Measure the resistance of the (P305) Accessory Delay Relay Control circuit from the Front Control Module IPM connector to the Relay connector. Is the resistance below 10.0 ohms? Yes Go to 4) . No Repair the (P305) Accessory Delay Relay Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (P305) Accessory Delay Relay Control circuit at the relay cavity (85). Is the resistance below 100.0 ohms? Yes Repair the (P305) Accessory Delay Relay Control circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Front Control Module in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module will set this DTC within 500 ms if the (P305) Accessory Delay Relay Control circuit is shorted to voltage.

Scheme 15

1. 1) CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go to 2) . No If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
2. 2) ACCESSORY DELAY RELAY Turn the ignition off. Install a substitute relay in place of the original Accessory Delay Relay. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 90 seconds. With the scan tool, read the active FCM DTC's. Does the scan tool display this DTC as active? Yes Go to 3) . No Replace the original Accessory Delay Relay. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
3. 3) (P305) ACCESSORY DELAY RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Remove the FCM from the Integrated Power Module. Remove the Accessory Delay Relay from the Junction Block. Turn the ignition on. Measure the voltage of the (P305) Accessory Delay Relay Control circuit at the relay connector (cavity 85). Is there any voltage present? Yes Repair the (P305) Accessory Delay Relay Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Front Control Module in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module will set this DTC within 500 ms if the (P305) Accessory Delay Relay Control circuit is open.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module is not configured correctly setting a false DTC that does not apply to this vehicle.