Front Control Module (Fcm) - Electrical Diagnostics: Other Dodge Dakota III рестайлинг

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: When the Front Control Module (FCM) does not detect voltage on the (C115) Defogger Relay Control circuit.

Possible Causes

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Scheme 23

Scheme 24

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Operate the Rear Window Defogger and the HVAC controls. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B106B-REAR DEFROST CONTROL CIRCUIT LOW? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. CHECK FOR OPEN IPM FUSE #59 Inspect IPM Fuse #59. Is the fuse open? Yes Go to step 3 No Go to step 6
3. REPLACE AND RECHECK IPM FUSE #59 Turn the ignition off. Install a new IPM Fuse #59. Turn the ignition on. Operate the Rear Window Defogger and the HVAC controls. Inspect IPM Fuse #59. Is the fuse open? Yes Go to step 4 No Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors for the cause of the open fuse and repair as necessary. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. CHECK FOR A SHORTED REAR WINDOW DEFOGGER RELAY Turn the ignition off. Install a known good relay in place of the Rear Window Defogger Relay. Install a new IPM Fuse #59. Turn the ignition on. Operate the Rear Window Defogger and the HVAC controls. Inspect IPM Fuse #59. Is the fuse open? Yes Go to step 5 No Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
5. CHECK (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove IPM Fuse #59. Remove the replacement Rear Window Defogger Relay. Disconnect the IPM C5 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (F504) Fused Ignition Switch Output (Run) circuit between ground and the IPM Fuse #59 connector. Is the resistance below 10K Ohms? Yes Replace the Integrated Power Module (IPM) and Fuse #59 in accordance with the Service Information. Reinstall the original Rear Window Defogger Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (F504) Fused Ignition Switch Output (Run) Circuit to the HVAC controls for a short to ground. Replace IPM Fuse #59. Reinstall the original Rear Window Defogger Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
6. CHECK (F921) IGNITION SWITCH OUTPUT (RUN) CIRCUIT FOR AN OPEN If not done previously, turn the ignition off, and then remove IPM Fuse #59. Turn the ignition on. Using a 12-volt test light connected to ground, check the (F921) Ignition Switch Output (Run) circuit at IPM Fuse #59 connector. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to step 7 No Repair the (F921) Ignition Switch Output (Run) circuit for an open. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
7. CHECK (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT FOR AN OPEN Turn the ignition off. Remove the Rear Window Defogger Relay. Reinstall IPM Fuse #59. Turn the ignition on. Using a 12-volt test light connected to ground, check the (F504) Fused Ignition Switch Output (Run) circuit at the Rear Window Defogger Relay connector. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to step 8 No Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
8. CHECK FOR AN OPEN REAR WINDOW DEFOGGER RELAY Turn the ignition off. Install a known good relay in place of the Rear Window Defogger Relay. Turn the ignition on. Using a scan tool, erase DTCs. Operate the Rear Window Defogger several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display the same DTC? Yes Go to step 9 No Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
9. CHECK (C115) DEFOGGER RELAY CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Remove the replacement Rear Window Defogger Relay. Disconnect the FCM from the Front Control Module IPM 49-way connector. Measure the resistance of the (C115) Defogger Relay Control circuit between the Rear Window Defogger Relay connector and the Front Control Module IPM 49-way connector. Is the resistance below 5.0 Ohms? Yes Go to step 10 No Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
10. CHECK (C115) DEFOGGER RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C115) Defogger Relay Control circuit between ground and the Rear Window Defogger Relay connector. Is the resistance below 10K Ohms? Yes Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on, during defogger operation.

1. Set Condition: When the Front Control Module (FCM) detects a short to voltage on the (C115) Defogger Relay Control circuit.

Scheme 25

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Operate the Rear Window Defogger switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B106C-REAR DEFROST CONTROL CIRCUIT HIGH? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. CHECK FOR A SHORTED REAR WINDOW DEFOGGER RELAY Turn the ignition off. Install a known good relay in place of the Rear Window Defogger Relay. Turn the ignition on. Using a scan tool, erase DTCs. Operate the Rear Window Defogger Switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B106C-REAR DEFROST CONTROL CIRCUIT HIGH? Yes Go to step 3 No Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. CHECK (C115) DEFOGGER RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Remove the replacement Rear Window Defogger Relay. Disconnect the FCM from the Front Control Module IPM 49-way connector. Turn the ignition on. Measure the voltage of the (C115) Defogger Relay Control circuit between the Rear Window Defogger Relay connector and ground. Is there any voltage present? Yes Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 26

Scheme 27

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all CCN DTCs. Actuate the Hazard Lamps. With the scan tool, read the DTC information. Does the scan tool read: B160D-TURN/HAZARD SWITCH INPUT CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. MULTIFUNCTION SWITCH Disconnect the Multifunction Switch connector. Turn the ignition on. Measure the voltage of the (G902) MUX Return circuit. Does the voltage read 5.0 volts? Yes Go to step 3 No Replace the Multifunction Switch in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. (G902) MUX RETURN CIRCUIT Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the Instrument Cluster C2 connector. Measure the resistance of the (G902) MUX Return circuit to ground. Is the resistance below 5.0 Ohms? Yes Repair the (G902) MUX return circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 28

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all CCN DTCs. Actuate the Hazard Lamps. With the scan tool, read the DTC information. Does the scan tool read: B160E-TURN/HAZARD SWITCH INPUT CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. MULTIFUNCTION SWITCH Disconnect the Multifunction Switch connector. Turn the ignition on. Measure the voltage between the (G902) MUX Return circuit and (L12) Turn Signal Input MUX circuit. Does the voltage read 0.0 volts? Yes Replace the Multifunction Switch in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go To 3
3. (G902) MUX RETURN CIRCUIT Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the Instrument Cluster C2 connector. Measure the resistance of the (G902) MUX Return circuit. Is the resistance below 5.0 Ohms? Yes Go to step 4 No Repair the (G902) MUX Return circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. INSTRUMENT CLUSTER Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the Instrument Cluster C2 connector. Measure the resistance of the (L12) Turn Signal Input MUX circuit. Is the resistance below 5.0 Ohms? Yes Replace the instrument Cluster in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L12) Turn Signal Input MUX circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 29

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 30

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B162B-LEFT LOW BEAM CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L43) LEFT LOW BEAM CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance between ground and the (L43) Left Low Beam Control circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L43) Left Low Beam Control circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 31

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 32

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B162F-RIGHT LOW BEAM CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L44) RIGHT LOW BEAM CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance between ground and the (L44) Right Low Beam Control circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L44) Right Low Beam Control circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 33

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 34

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B1630-RIGHT LOW BEAM CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L44) RIGHT LOW BEAM CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance of the (L44) Right Low Beam Control circuit. Is the resistance above 5.0 Ohms? Yes Repair the (L44) Right Low Beam Control circuit for a short to battery condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 35

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 36

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the High beam Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B1633-LEFT HI BEAM CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L33) LEFT HIGH BEAM OUTPUT CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance between ground and the Left High beam Output circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L33) Left High beam Output circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 37

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a high condition.

Scheme 38

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B1634-LEFT HI BEAM CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L33) HIGH BEAM CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance of the (L33) High Beam Control circuit. Is the resistance above 5.0 Ohms? Yes Repair the (L33) High Beam Control circuit for a short to battery condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 39

1. When Monitored: With the High beam Headlamps activated.

1. Set Condition: When the FCM detects a High condition.

Scheme 40

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the High beam Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B1637-RIGHT HI BEAM CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L34) RIGHT HIGH BEAM OUTPUT CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance between ground and the Right High beam Output circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L34) Right High beam Output circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 41

1. When Monitored: With the Headlamps activated.

1. Set Condition: When the FCM detects a high condition.

Scheme 42

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Headlamps on. With the scan tool read the DTC information. Does the scan tool read: B1638-RIGHT HI BEAM CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L34) HIGH BEAM CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance of the (L34) High Beam Control circuit. Is the resistance above 5.0 Ohms? Yes Repair the (L34) High Beam Control circuit for a short to battery condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 43

Scheme 44

1. INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTCs. Turn the Left Turn Signals on. With the Scan Tool read the DTC information. Does the Scan Tool read: B163B-FRONT LEFT TURN CONTROL CIRCUIT LOW? Yes Go To 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. L61 FRONT LEFT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 connector. Measure the resistance between ground and the (L61) Front Left Turn Signal Control circuit. Is the resistance below 5.0 ohms? Yes Go to step 3 No Repair the (L61) Front Left Turn Signal Control circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the FCM C2 connector. Measure the resistance between ground and the (L61) Front Left Turn Signal Control circuit in the FCM. Is the resistance below 5.0 ohms? Yes Replace the Power Distribution Center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 45

1. When Monitored: Continuously

1. Set Condition: When the Front Control Module detects a short to battery on the Control circuit.

Scheme 46

1. INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTCs. Turn the Right Turn Signals on. With the Scan Tool read the DTC information. Does the Scan Tool read: B163F-FRONT RIGHT TURN CONTROL CIRCUIT LOW? Yes Go To 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. L60 FRONT RIGHT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 harness connector. Measure the resistance between ground and the (L60) Front Turn Signal Control circuit. Is the resistance below 5.0 ohms? Yes Go to step 3 No Repair the (L60) Front Right Turn Signal Control circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the FCM connector. Measure the resistance between ground and the (L60) Front Right Turn Signal Control circuit in the FCM. Is the resistance below 5.0 ohms? Yes Replace the Power Distribution Center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 47

1. When Monitored: Continuously

1. Set Condition: When the Front Control Module (FCM) detects a short to battery on the Control circuit.

Scheme 48

1. INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all FCM DTCs. Turn the Left Turn Signals on. With the Scan Tool read the DTC information. Does the Scan Tool read: B1643-REAR LEFT TURN CONTROL CIRCUIT LOW? Yes Go To 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. L63 LEFT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM PDM connector. Measure the resistance between ground and the (L63) Rear Left Turn Signal Control circuit. Is the resistance below 5.0 ohms? Yes Go to step 3 No Repair the (L63) Rear Left Turn Signal Control circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the FCM connector. Disconnect the PDM connector. Measure the resistance between ground and the (L63) Left Turn Signal Control circuit in the PDM. Is the resistance below 5.0 ohms? Yes Replace the Module Power Distribution Center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 49

1. When Monitored: Continuously

1. Set Condition: When the Front Control Module detects a short to battery on the Control circuit.

Scheme 50

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Right Turn Signals on. With the scan tool read the DTC information. Does the scan tool read: B1647-REAR RIGHT TURN CONTROL CIRCUIT LOW? Yes Go To 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. L62 RIGHT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM PDM connector. Measure the resistance between ground and the (L62) Rear Turn Signal Control circuit. Is the resistance below 5.0 Ohms? Yes Go to step 3 No Repair the (L62) Rear Right Turn Signal Control circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the FCM connector. Disconnect the PDM connector. Measure the resistance between ground and the (L62) Right Turn Signal Control circuit in the PDM. Is the resistance below 5.0 Ohms? Yes Replace the Module Power Distribution Center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: Continuously

1. Set Condition: When the Front Control Module detects a short to battery on the Control circuit.

1. When Monitored: With the Fog Lamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 51

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Fog Lamps on. With the scan tool read the DTC information. Does the scan tool read: B1659-FRONT FOG LAMP CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L139) FOG LAMP CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM PDM harness connector. Measure the resistance between ground and the (L139) Fog Lamp Control circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L139) Fog Lamp Control circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 52

1. When Monitored: With the Park Lamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 53

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Park Lamps on. With the scan tool read the DTC information. Does the scan tool read: B165C-PARK LAMP CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L779) PARK LAMP CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM PDM harness connector. Measure the resistance between ground and the (L779) Park Lamp Control circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L779) Park Lamp Control circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the Front Fog Lamps activated.

1. Set Condition: When the FCM detects a high condition.

Scheme 54

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Actuate the Park Lamps. With the scan tool read the DTC information. Does the scan tool read: B165D-PARK LAMP CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. PARK LAMP RELAY Turn the ignition off. Remove and install a known good relay in place of the Park Lamp Relay. Do the Front Fog Lamps operate normally? Yes Replace the Park Lamp Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Park Lamp Relay from the MPD. Remove the FCM from the Module Power Distribution. Measure the voltage of the (L779) Park Lamp Relay Output circuit and ground. Is the voltage above 1.0 volts? Yes Replace the Module Power Distribution center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Module Front Control in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the Front Fog Lamps activated.

1. Set Condition: When the FCM detects a high condition.

Scheme 55

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Actuate the Front Fog Lamps. With the scan tool read the DTC information. Does the scan tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. FRONT FOG LAMP RELAY Turn the ignition off. Remove and install a known good relay in place of the Front Fog Lamp Relay. Do the Front Fog Lamps operate normally? Yes Replace the Front Fog Lamp Relay in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Front Fog Lamp Relay from the MPD. Remove the FCM from the Module Power Distribution. Measure the voltage of the (L139) Front Fog Lamp Relay Output circuit and ground. Is the voltage above 1.0 volts? Yes Replace the Module Power Distribution center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Module Front Control in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 56

1. When Monitored: With the Trailer Tow Lamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 57

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Trailer Tow Lamps on. With the scan tool read the DTC information. Does the scan tool read: B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. (L655) TRAILER TOW CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM PDM harness connector. Measure the resistance between ground and the (L655) Left Trailer Tow Control circuit. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (L655) Left Trailer Tow Control circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the Trailer Tow Lamps activated.

1. Set Condition: When the FCM detects a low condition.

Scheme 58

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Actuate the Trailer Tow Lamps. With the scan tool read the DTC information. Does the scan tool read: B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. LEFT TRAILER TOW RELAY Turn the ignition off. Remove and install a known good relay in place of the Left Trailer Tow Relay. Do the Trailer Tow Lamps operate normally? Yes Replace the Left Trailer Tow Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Left Trailer Tow Relay from the MPD. Remove the FCM from the Module Power Distribution. Measure the voltage of the (L655) Left Trailer Tow Relay Output circuit and ground. Is the voltage above 1.0 volts? Yes Replace the Module Power Distribution center in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Module Front Control in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 59

1. When Monitored: Continuously

1. Set Condition: When the Front Control Module does not detect voltage on the Trailer Tow Relay Control circuit.

Scheme 60

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs Actuate the Trailer Tow Lamps. With the scan tool, read DTCs. Does the scan tool read: B166F-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT LOW? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. PDM FUSE 21 Using a 12-volt test light connected to ground, check the IPM Fuse 21. Does the test light illuminate and was the fuse OK? No Replace the IPM Fuse 21 if open and check for a short to ground on the Relay Output circuit or correct the open B(+) circuit to the fuse. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 3
3. OPEN FUSED B(+) TO RELAY Remove the Trailer Tow Relay from the IPM. Using a 12-volt test light connected to ground, check the Fused B(+) circuit at the relay connector. Does the test light illuminate? No Replace the IPM. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 4
4. RIGHT TRAILER TOW RELAY Install a known good relay in place of the Trailer Tow Relay. With the scan tool erase DTCs Cycle the ignition from on to off 3 times and leave on. With the scan tool, read DTCs. Does the scan tool display the same DTC? No Replace the original Trailer Tow Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 5
5. (L656) TRAILER TOW RELAY CONTROL SHORTED Remove the Right Trailer Tow Relay. Disconnect the Front Control Module from the IPM 49-way connector. Measure the resistance between ground and the (L656) Trailer Tow Relay Control circuit at the relay. Is the resistance below 1000.0 Ohms? Yes Replace the IPM. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 6
6. (L656) TRAILER TOW RELAY CONTROL OPEN Measure the resistance of the (L656) Trailer Tow Relay Control circuit from the relay connector to FCM connector. Is the resistance below 3.0 Ohms? Yes Replace the Front Control Module. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the IPM. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the Trailer Tow Lamps activated.

1. Set Condition: When the FCM detects a high condition.

1. When Monitored: With the Fog Lamps on.

1. Set Condition: When the CCN detects a Fog Lamp Switch Stuck message on the BUS.

Scheme 61

Scheme 62

1. TEST FOR INTERMITTENT CONDITION NOTE: Prior to testing, check and inspect that all applicable fuses are functional and working properly. With the scan tool, record and erase DTCs Operate the Fog Lamp Switch several times. Turn the ignition on and wait 30 seconds. With the scan tool, read DTCs. Does the scan tool display: B168F-FRONT FOG LAMP SWITCH STUCK? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. HEADLAMP SWITCH SHORTED With the scan tool, erase DTCs. Disconnect the Headlamp Switch connector. With the scan tool, read DTCs. Does the scan tool display: B168F-FRONT FOG LAMP SWITCH STUCK? No Replace the Headlamp Switch in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 3
3. (L307) HEADLAMP SWITCH MUX CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the Cluster C2 connector. Measure the resistance between ground and the (L307) Headlamp Switch MUX circuit. Is the resistance below 10000.0 Ohms? Yes Repair the (L307) Headlamp Switch MUX circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. (L307) SWITCH MUX CIRCUIT SHORT TO (L900) SWITCH RETURN CIRCUIT Disconnect the Cluster C2 connector. Measure the resistance between the (L307) Switch MUX circuit and the (L900) Switch Return circuit. Is the resistance below 10000.0 Ohms? Yes Repair the (L307) Switch MUX circuit for a short to the (L900) Switch Return circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Instrument Cluster. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 63

1. When Monitored: Continuously

1. Set Condition: When the FCM senses 12 volts on the Hood Ajar Switch Sense circuit for over 10 seconds, this code will set.

Scheme 64

Scheme 65

Scheme 66

1. TEST FOR INTERMITTENT CONDITION NOTE: Open the hood and ensure the Hood Ajar Switch is connected before proceeding With the scan tool, record and erase DTCs Close the hood. Cycle the ignition from on to off. Turn the ignition on. Open then close the hood. With the scan tool, read DTCs. Does the scan tool display B1820-HOOD AJAR INPUT CIRCUIT HIGH? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. INCORRECT HOOD SECURITY SWITCH INSTALLED Inspect the retainer ring on the hood ajar switch. A dark brown retainer ring identifies the hood ajar switch used for certain export applications, while a white retainer ring identifies the remote starter system application. Is the correct switch installed? Yes Go to step 3 No Replace the Hood Ajar Switch. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. HOOD AJAR SWITCH OPEN Disconnect the Hood Ajar Switch harness connector. Depress the plunger of the hood ajar switch and measure the resistance between the two terminals of the switch. Is the resistance approximately 1k Ohms? Yes Go to step 4 No Replace the Hood Ajar Switch. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. (Z384) GROUND CIRCUIT OPEN Using a 12-volt Test Light connected to 12-volts, check the (Z384) Ground circuit. Does the test light illuminate? Yes Go to step 5 No Repair the (Z384) Ground circuit for an open. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
5. (G70) HOOD AJAR SWITCH SENSE CIRCUIT SHORT TO VOLTAGE Disconnect the FCM 49-way connector. Turn the ignition on. Measure the voltage between the (G70) Hood Ajar Switch Sense circuit and ground. Is there any voltage present? Yes Repair the (G70) Hood Ajar Switch Sense circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 6
6. (G70) HOOD AJAR SWITCH SENSE CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (G70) Hood Ajar Switch Sense circuit between the FCM 49-way connector and the Hood Ajar Switch connector. Is the resistance below 2.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (G70) Hood Ajar Switch Sense circuit for an open. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 67

1. When Monitored: With the ignition on.

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

Scheme 68

1. CHECK FOR ACTIVE DTC NOTE: With the scan tool, verify communication with the SKREEM/WCM. Diagnose any loss of communication faults. NOTE: Diagnose any SKREEM/WCM DTCs present before proceeding with test. With the scan tool, read the active DTCs. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 30 seconds. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. VERIFY IGNITION SWITCH STATUS USING SCAN TOOL Using the scan tool, read the Ignition Switch status in the SKREEM/WCM, and the FCM. This information is located in the "Data Display" part for each module. Does the "Data Display" information on the scan tool match with the status of the Ignition Switch? Yes Go to step 3 No Using «SYSTEM WIRING DIAGRAMS»(ref-313023) and Service Information, diagnose any Ignition Switch faults. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. (F20) IGNITION SWITCH SENSE INPUT CIRCUIT OPEN Turn the ignition off. Disconnect the IPM C1 harness connector. Disconnect the Ignition Switch harness connector. Measure the resistance of the (F20) Ignition Switch Sense Input circuit between the IPM C1 and Ignition Switch harness connectors. Is the resistance above 10K ohms? Yes Repair the (F20) Ignition Switch Sense Input circuit for an open. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: With the ignition on.

1. Set Condition: Battery voltage less than 9 volts for more than 15 seconds.

1. When Monitored: With the ignition on.

1. Set Condition: Battery voltage greater than 16 volts for more than 15 seconds.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) detects the (T103) 5 volt supply circuit voltage below 0.3 volts.

Scheme 69

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. A/C PRESSURE TRANSDUCER Turn the ignition off. Disconnect the A/C Pressure Transducer harness connector. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the A/C Pressure Transducer in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. SHIFT MOTOR/MODE SENSOR ASSEMBLY (IF EQUIPPED) Turn the ignition off. Disconnect the Shift Motor/Mode Sensor Assembly harness connector. NOTE: If the vehicle is not equipped with this assembly, answer yes to the question. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 4 No Replace the Shift Motor/Mode Sensor Assembly in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
4. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the FCM C1 harness connector. Measure the resistance between ground and the (T103) 5 Volt Supply circuit. Is the resistance below 1000.0 ohms? Yes Repair the (T103) 5 Volt Supply circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) 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 the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) detects the (T103) 5 volt supply circuit voltage above 5.0 volts.

Scheme 70

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. A/C PRESSURE TRANSDUCER Turn the ignition off. Disconnect the A/C Pressure Transducer harness connector. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the A/C Pressure Transducer in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. SHIFT MOTOR/MODE SENSOR ASSEMBLY (IF EQUIPPED) Turn the ignition off. Disconnect the Shift Motor/Mode Sensor Assembly harness connector. NOTE: If the vehicle is not equipped with this assembly, answer yes to the question. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 4 No Replace the Shift Motor/Mode Sensor Assembly in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
4. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the FCM C1 harness connector. Turn the ignition on. Measure the voltage of the (T103) 5 Volt Supply circuit. Is the voltage above 5.5 volts? Yes Repair the (T103) 5 Volt Supply circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) 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 the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 71

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this DTC within 2 seconds if the Ignition Run-Acc Relay Control circuit is shorted to ground.

Scheme 72

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. IGNITION RUN-ACC RELAY Turn the ignition off. Install a substitute relay in place of the original Ignition Run-Acc Relay. Turn the ignition on. With the scan tool, read the active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the original Ignition Run-Acc Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. IGNITION RUN-ACC RELAY CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Remove the FCM from the IPM. Remove the Ignition Run-Acc Relay from the PDC. Measure the resistance between ground and the Ignition Run-Acc Relay Control circuit at the relay cavity (85). Is the resistance below 100.0 Ohms? Yes Replace the IPM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this DTC within 2 seconds if the (F981) Ignition Run-Acc Relay Control circuit is shorted to voltage.

Scheme 73

1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTCs. 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. IGNITION RUN-ACC RELAY Turn the ignition off. Install a substitute relay in place of the original Ignition Run-Acc Relay. Turn the ignition on. With the scan tool, read the active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the original Ignition Run-Acc Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. IGNITION RUN-ACC RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Remove the FCM from the IPM. Remove the Ignition Run-Acc Relay from the PDC. Turn the ignition on. Measure the voltage of the Ignition Run-Acc Relay Control Circuit at the relay connector (cavity 85). Is there any voltage present? Yes Replace the IPM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 74

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this if the Left Trailer Tow Brake Lamp Relay Control circuit is shorted to ground for greater than 2 seconds.

1. When Monitored: With the ignition off.

1. Set Condition: The Front Control Module (FCM) will set this if the Left Trailer Tow Brake Lamp Relay Control circuit is shorted to voltage for greater than 0.1 of a second.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this DTC within 500ms if the (K617) Run/Start Relay Control circuit is shorted to ground.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this DTC within 500ms if the (K617) Run/Start Relay Control circuit is shorted to voltage.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module will (FCM) set this DTC within 500ms if the Ignition Run Relay Control circuit is shorted to ground.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this if the (F924) Fused Ignition Switch Output (Start) circuit is shorted to ground for greater than 2 seconds.

Scheme 75

Scheme 76

1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. STARTER RELAY Turn the ignition off. Install a substitute relay in place of the original Starter 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the original Starter Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. INTEGRATED POWER MODULE (IPM) Turn the ignition off. Disconnect the IPM C2 harness connector. Using an ohmmeter, measure the resistance between the (F924) Fused Ignition Switch Output (Start) circuit and ground. Is the resistance below 5.0 ohms? Yes Go to step 4 No Replace the IPM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. (F924) FUSED IGNITION SWITCH OUTPUT (START) CIRCUIT SHORTED TO GROUND Disconnect the FCM C1 harness connector. Using an ohmmeter, measure the resistance between the (F924) Fused Ignition Switch Output (Start) circuit and ground. Is the resistance below 5.0 ohms? Yes Repair the (F924) Fused Ignition Switch Output (Start) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this if the (F924) Fused Ignition Switch Output (Start) circuit is shorted to voltage for greater than 2 seconds.

Scheme 77

1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go to step 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. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. STARTER RELAY Turn the ignition off. Install a substitute relay in place of the original Starter 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 DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the original Starter Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. (F924) FUSED IGNITION SWITCH OUTPUT (START) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the IPM C2 harness connector. Disconnect the FCM C1 harness connector. Turn the ignition on. Using a voltmeter, measure the voltage of the (F924) Fused Ignition Switch Output (Start) circuit and ground. Is voltage present? Yes Repair the (F924) Fused Ignition Switch Output (Start) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 78

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this if the Left Trailer Tow Brake Lamp Relay Control circuit is shorted to ground for greater than 2 seconds.

Scheme 79

1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No If the DTC is stored, check for an intermittent condition. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. POWERTRAIN CONTROL MODULE INTERNALLY SHORTED Turn the ignition off. Disconnect the Powertrain Control Module C1 harness connector. Turn the ignition on. With the scan tool, read DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Replace the Powertrain Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. (F1) FUSED IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the IPM C5 harness connector. Measure the resistance between ground and the (F1) Fused Ignition Switch Output (Unlock-Run-Start) circuit at the IPM C5 harness connector. Is the resistance below 10K ohms? Yes Repair the (F1) Fused Ignition Switch Output (Unlock-Run-Start) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 4
4. CHECK FCM AND IPM FOR A SHORT TO GROUND Disconnect the Front Control Module from the IPM. Measure the resistance to ground at the male terminal of the IPM C5 connector. Is the resistance below 10K ohms? Yes Replace the IPM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) will set this if the Left Trailer Tow Brake Lamp Relay Control circuit is shorted to ground for greater than 2seconds.

Scheme 80

Scheme 81

1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, read the active DTCs. Cycle the ignition switch from off to on, leaving the ignition on for a minimum of 30 seconds. With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No If the DTC is stored, check for an intermittent condition. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. (F1) FUSED IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the IPM C5 harness connector. Disconnect the PCM C1 harness connector. Turn the ignition on. Measure the voltage of the (F1) Fused Ignition Switch Output (Unlock-Run-Start) circuit at the IPM C5 harness connector. Is voltage present? Yes Repair the (F1) Fused Ignition Switch Output (Unlock-Run-Start) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 3
3. POWERTRAIN CONTROL MODULE INTERNALLY SHORTED Reconnect the Powertrain Control Module C1 harness connector. Measure the voltage of the (F1) Fused Ignition Switch Output (Unlock-Run-Start) circuit at the IPM C5 harness connector. Is voltage present? Yes Replace the Powertrain Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 4
4. CHECK FCM AND IPM FOR A SHORT TO VOLTAGE Disconnect the Front Control Module from the IPM. Measure the voltage at the male terminal of the IPM C5 connector. Is voltage present? Yes Replace the IPM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the FCM in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously.

1. Set Condition: The Front Control Module detects an internal fault.

1. When Monitored: With the ignition on.

1. Set Condition: When the Instrument Cluster detects a short/HIGH condition.

Scheme 82

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all CCN DTCs. Turn the Wipers ON then OFF. With the scan tool, read the Wiper DTCs. Does the scan tool read: B2301-WIPER MODE SWITCH INPUT CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. MULTIFUNCTION SWITCH Turn the ignition off. Disconnect the Multifunction Switch harness connector. Make sure the switch is in the OFF position. Measure the internal resistance of the Multifunction Switch between the G902 and W52 circuits. Does the Switch measure more than 5.0 Ohms? Yes Replace the Multifunction Switch in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. INSTRUMENT CLUSTER Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the Instrument Cluster C1 harness connector. Measure the resistance of the (W52) MUX circuit to ground. Is the resistance below 5.0 Ohms? Yes Repair the (W52) MUX circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: When the Instrument Cluster detects a short/HIGH condition.

Scheme 83

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Wipers on. With the scan tool, read the Wiper DTCs. Does the scan tool read: B2304-WIPER PARK SWITCH INPUT CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. MULTIFUNCTION SWITCH Turn the ignition off. Disconnect the Multifunction Switch connector. Measure the internal resistance of the Multifunction Switch between cavity 1 and 4 of the switch. Is the resistance above 5.0 Ohms? Yes Replace the Multifunction Switch in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the FCM C1 harness connector. Measure the resistance between ground and the (W7) Front Wiper Park Switch Sense circuit. Is the resistance below 5.0 Ohms? Yes Repair the (W7) Front Wiper Park Switch Sense circuit for a short condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: When the Instrument Cluster detects a short condition.

Scheme 84

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all CCN DTCs. Turn the Washers ON then OFF. With the scan tool, read the Washer DTCs. Does the scan tool read: B2301-WIPER MODE SWITCH INPUT CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. MULTIFUNCTION SWITCH Turn the ignition off. Disconnect the Multifunction Switch harness connector. Make sure the switch is in the OFF position. Measure the internal resistance of the Multifunction Switch between the G902 and G194 circuits. Does the Switch measure more than 5.0 Ohms? Yes Replace the Multifunction Switch in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. INSTRUMENT CLUSTER Turn the ignition off. Disconnect the Multifunction Switch connector. Disconnect the Instrument Cluster C2 harness connector. Measure the resistance of the (G194) MUX circuit to ground. Is the resistance below 5.0 Ohms? Yes Repair the (G194) MUX circuit for a short to ground condition. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 85

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a short/low condition.

Scheme 86

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Wipers ON then OFF. With the scan tool, read the Wiper DTCs. Does the scan tool read: B2313-WIPER ON/OFF CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. WIPER ON/OFF RELAY Turn the ignition off. Install a substitute relay in place of the Wiper On/Off Relay. Turn the ignition on. With the scan tool, read the DTCs. Does the scan tool read: B2313-WIPER ON/OFF CONTROL CIRCUIT LOW? Yes Go to step 3 No Replace the Wiper On/Off Relay in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Wiper On/Off Relay. Disconnect the FCM IPM harness connector. Measure the resistance between ground and the (W5) Wiper On/Off Relay Control circuit in the IPM. Is the resistance below 5.0 Ohms? Yes Replace the IPM in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a short/high condition.

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a short/low condition.

Scheme 87

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Wipers from High to Low. With the scan tool, read the Wiper DTCs. Does the scan tool read: B2317-WIPER HI/LOW CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. WIPER HI/LOW RELAY Turn the ignition off. Install a substitute relay in place of the Wiper Hi/Low Relay. Turn the ignition on. With the scan tool, read the DTCs. Does the scan tool read: B2317-WIPER HI/LOW CONTROL CIRCUIT LOW? Yes Go to step 3 No Replace the Wiper Hi/Low Relay in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Wiper Hi/Low Relay. Disconnect the FCM C3 harness connector. Measure the resistance between ground and the Wiper Hi/Low Relay Control circuit in the IPM. Is the resistance below 5.0 Ohms? Yes Replace the IPM in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a short/high condition.

1. When Monitored: With the ignition on.

1. Set Condition: When the FCM detects a short/low condition on the washer Pump Motor Control circuit.

Scheme 88

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Washers on. With the scan tool, read the Wiper/Washers DTCs. Does the scan tool read: B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW? Yes Go to step 2 No The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. WASHER PUMP MOTOR Turn the ignition off. Disconnect the Washer Pump Motor connector. Turn the ignition on. With the scan tool, read the DTCs. Does the scan tool read: B231F-FRONT/REAR WASHER MOTOR CONTROL CIRCUIT LOW? Yes Replace the Washer Pump Motor in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. WASHER PUMP MOTOR CONTROL CIRCUIT Turn the ignition off. Disconnect the Washer Pump Motor harness connector. Disconnect the FCM C3 harness connector. Measure the resistance between ground and the (W10) Washer Pump Motor Control circuit in the. Is the resistance below 5.0 ohms? Yes Repair the Washer Pump Motor Control circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. FRONT CONTROL MODULE Turn the ignition off. Disconnect the FCM from the integrated power module (IPM). Measure the resistance between ground and the (W10) Washer Pump Motor Control circuit. Is the resistance below 5.0 ohms? Yes Replace the IPM in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the service information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: With the ignition on.

1. Set Condition: The FCM detects an open condition.

1. When Monitored: Continuously.

1. Set Condition: When the Front Control Module (FCM) does not detect voltage on the (X4) Horn Relay Control circuit.

Scheme 89

Scheme 90

Scheme 91

Scheme 92

Scheme 93

Scheme 94

Scheme 95

Scheme 96

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Operate the Horn Switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B2336-HORN CONTROL CIRCUIT LOW? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. CHECK FOR OPEN HORN FUSE Inspect the Horn Fuse. Is the fuse open? Yes Go to step 3 No Go to step 9
3. REPLACE AND RECHECK HORN FUSE Turn the ignition off. Install a new Horn Fuse. Turn the ignition on. Operate the Horn Switch several times. Inspect the Horn Fuse. Is the fuse open? Yes Go to step 4 No Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors for the cause of the open fuse and repair as necessary. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. CHECK (A950) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove the Horn Fuse. Remove the Horn Relay. Measure the resistance of the (A950) Fused B(+) circuit between ground and the Horn Relay connector. Is the resistance below 10K Ohms? Yes Replace the Integrated Power Module (IPM) and the Horn Fuse in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 5
5. CHECK (X2) HORN RELAY OUTPUT CIRCUIT FOR A SHORT TO GROUND Disconnect the Horn 1 and Horn 2 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (X2) Horn Relay Output circuit between ground and the Horn Relay connector. Is the resistance below 10K Ohms? Yes Go to step 6 No Go to step 7
6. CHECK (X2) HORN RELAY OUTPUT CIRCUIT IN IPM FOR A SHORT TO GROUND Disconnect the IPM C3 connector. NOTE: Check connectors. Clean and repair as necessary. Measure the resistance of the (X2) Horn Relay Output circuit between ground and the Horn Relay connector. Is the resistance below 10K Ohms? Yes Replace the Integrated Power Module (IPM) and the Horn Fuse in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the (X2) Horn Relay Output circuit for a short to ground. Replace the Horn Fuse. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
7. CHECK FOR A SHORTED HORN RELAY Reconnect the Horn 1 and Horn 2 connector. Install a known good relay in place of the Horn Relay. Install a new Horn Fuse. Turn the ignition on. Operate the Horn Switch several times. Inspect the Horn Fuse. Is the fuse open? Yes Go to step 8 No Replace the original Rear Horn Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
8. CHECK FOR A SHORTED HORN Turn the ignition off. Disconnect the Horn 1 connector. Install a new Horn Fuse. Turn the ignition on. Operate the Horn Switch several times. Inspect the Horn Fuse. Is the fuse open? Yes Replace Horn 2 and the Horn Fuse in accordance with the Service Information. Reinstall the original Horn Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace Horn 1 in accordance with the Service Information. Reinstall the original Horn Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
9. CHECK (A1) B(+) CIRCUIT FOR AN OPEN If not done previously, turn the ignition off, and then remove the Horn Fuse. Turn the ignition on. Using a 12-volt test light connected to ground, check the (A1) B(+) circuit at the Horn Fuse connector. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to step 10 No Repair the (A1) B(+) circuit for an open. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
10. CHECK (A950) FUSED B(+) CIRCUIT FOR AN OPEN Turn the ignition off. Remove the Horn Relay. Reinstall the Horn Fuse. Turn the ignition on. Using a 12-volt test light connected to ground, check the (A950) Fused B(+) circuit at the Horn Relay connector. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to step 11 No Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
11. CHECK FOR AN OPEN HORN RELAY Turn the ignition off. Install a known good relay in place of the Horn Relay. Using a scan tool, erase DTCs. Operate the Horn Switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display the same DTC? Yes Go to step 12 No Replace the original Horn Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
12. CHECK (X4) HORN RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove the replacement Horn Relay. Disconnect the FCM from the Front Control Module IPM 49-way connector. Measure the resistance of the (X4) Horn Relay Control circuit between ground and the Horn Relay connector. Is the resistance below 10K Ohms? Yes Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 13
13. CHECK (X4) HORN RELAY CONTROL CIRCUIT FOR AN OPEN Measure the resistance of the (X4) Horn Relay Control circuit between the Relay connector and the Front Control Module IPM 49-way connector. Is the resistance below 5.0 Ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. When Monitored: During horn operation.

1. Set Condition: When the Front Control Module (FCM) detects a short to voltage on the (X4) Horn Relay Control circuit.

Scheme 97

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs). Operate the Horn Switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B2337-HORN CONTROL CIRCUIT HIGH? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
2. CHECK FOR A SHORTED HORN RELAY Turn the ignition off. Install a known good relay in place of the Horn Relay. Turn the ignition on. Using a scan tool, erase DTCs. Operate the Horn Switch several times. Cycle the ignition from on to off three times and leave on. Using a scan tool, read DTCs. Does the scan tool display: B2337-HORN CONTROL CIRCUIT HIGH? Yes Go to step 3 No Replace the original Horn Relay in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. CHECK (X4) HORN RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Remove the replacement Horn Relay. Disconnect the FCM from the Front Control Module IPM 49-way connector. Turn the ignition on. Measure the voltage of the (X4) Horn Relay Control circuit between the Horn Relay connector and ground. Is there any voltage present? Yes Replace the Integrated Power Module (IPM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 98

1. When Monitored: Ignition on. Battery voltage between 9 and 16 volts. No Range Position Sensor low or high voltage conditions present.

1. Set Condition: During a blocked shift attempt, motor current indicates motor movement, but the sensor value change is less than a specified value.

Scheme 99

Scheme 100

Scheme 101

Scheme 102

Scheme 103

Scheme 104

Scheme 105

Scheme 106

1. DTC IS ACTIVE Ignition on, engine not running. NOTE: Repair any system undervoltage or overvoltage DTCs that are set in this module before proceeding. With the scan tool, select View DTCs in the Front Control Module. Is the DTC status Active at this time? Yes Go to step 2 No Go to step 10
2. (T103) 5 VOLT SUPPLY CIRCUIT VOLTAGE Turn the ignition off to the lock position. Disconnect the Shift Motor/Mode Sensor harness connector. Ignition on, engine not running. Measure the voltage between ground and the (T103) Drivetrain 5-volt Supply circuit at the Shift Motor/Mode Sensor harness connector. Select the displayed voltage reading: Voltage greater than 5.5 volts. Repair the (T103) Drivetrain 5-volt Supply circuit for a short to voltage. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Voltage between 4.5 and 5.5 volts. Go to step 5 Voltage less than 4.5 volts. Go to step 3
3. (T103) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT HIGH RESISTANCE Turn the ignition off to the lock position. Disconnect the FCM C1 harness connector. Measure the resistance of the (T103) Drivetrain 5-volt Supply circuit between the FCM C1 harness connector and the Shift Motor/Mode Sensor harness connector. Is the resistance above 5.0 ohms? Yes Repair the high resistance in the (T103) Drivetrain 5-volt Supply circuit. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. (T103) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T103) 5-volt Supply circuit. Is the resistance below 5.0 ohms? Yes Repair the (T103) Drivetrain 5-volt Supply circuit for a short to ground. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
5. TRANSFER CASE MOTOR Turn the ignition off to the lock position. Connect a jumper wire between the (D201) Mode Sensor Signal circuit and the (G180) Drivetrain Sensor Return circuit. Ignition on, engine not running. With the scan tool under Data Display, read the T-Case Position Sensor voltage. The displayed voltage should be approximately 0 volts with the jumper wire in place. Does the voltage read 0.0 (± 0.02 volts)? Yes Replace the Transfer Case Motor in accordance with the Service Information. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 6
6. (D201) MODE SENSOR SIGNAL CIRCUIT HIGH RESISTANCE Turn the ignition off to the lock position. Disconnect the FCM C1 harness connector. Measure the resistance of the (D201) Mode Sensor Signal circuit between the FCM C1 harness connector and the Shift Motor/Mode Sensor harness connector. Is the resistance above 5.0 ohms? Yes Repair the high resistance in the (D201) Mode Sensor Signal circuit. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 7
7. (D201) MODE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (D201) Mode Sensor Signal circuit. Is the resistance below 5.0 ohms? Yes Repair the (D201) Mode Sensor Signal circuit for a short to ground. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 8
8. (D201) MODE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE Ignition on, engine not running. Measure the voltage between ground and the (D201) Mode Sensor Signal circuit. Is there any voltage present? Yes Repair the (D201) Mode Sensor Signal circuit for a short to voltage. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 9
9. (G180) FRONT CONTROL MODULE (FCM) SENSOR RETURN CIRCUIT HIGH RESISTANCE Turn the ignition off to the lock position. Measure the resistance between ground and the (G180) FCM Sensor Return circuit. Is the resistance below 5.0 ohms? Yes Replace the Front Control Module (FCM) in accordance with the Service Information. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Repair the high resistance in the (G180) Drivetrain Sensor Return circuit. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
10. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times. Look for the data to change other than as expected or for the DTC to reset. Were any problems found? Yes Repair as necessary. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

Scheme 107

1. When Monitored: Ignition on. Battery voltage between 9 and 16 volts.

1. Set Condition: FCM detects a short to ground on the Transfer Case Position Sensor signal circuit for 2 seconds.

Scheme 108

Scheme 109

Scheme 110

Scheme 111

Scheme 112

1. CHECK THE T-CASE POSITION SENSOR VOLTAGE Ignition on, engine not running. With the scan tool under Data Display, read the T-Case Position Sensor voltage. Is the voltage below 0.2 of a volt? Yes Go to step 2 No Go to step 8
2. CHECK THE (T103) 5 VOLT SUPPLY CIRCUIT VOLTAGE Turn the ignition off to the lock position Disconnect the Shift Motor/Mode Sensor harness connector. Ignition on, engine not running. Measure the voltage of the (T103) 5 Volt Supply circuit. Is the voltage below 0.2 of a volt? Yes Go to step 3 No Go to step 5
3. (T103) 5 VOLT SUPPLY CIRCUIT OPEN Turn the ignition off to the lock position Disconnect the FCM C1 harness connector. Measure the resistance of the (T103) 5 Volt Supply circuit between the FCM C1 harness connector and the Shift Motor/Mode Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T103) 5 Volt Supply circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T103) 5 Volt Supply circuit. Is the resistance below 5.0 Ohms? Yes Repair the (T103) 5 Volt Supply circuit for a short to ground. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
5. SHIFT MOTOR/MODE SENSOR ASSEMBLY With the scan tool under Data Display, read the T-Case Position Sensor voltage. Is the voltage above 4.5 volts? Yes Replace the Shift Motor/Mode Sensor Assembly in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 6
6. (D201) MODE SENSOR A CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (D201) Mode Sensor A circuit. Is the resistance below 5.0 Ohms? Yes Repair the (D201) Mode Sensor A circuit for a short to ground. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 7
7. (D201) MODE SENSOR A CIRCUIT SHORTED TO (G180) FCM SENSOR RETURN CIRCUIT Measure the resistance between the (D201) Mode Sensor A circuit and the (G180) FCM Sensor Return circuit. Is the resistance below 5.0 Ohms? Yes Repair the (D201) Mode Sensor A circuit for a short to the (G180) FCM Sensor Return circuit. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
8. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

1. When Monitored: Ignition on. Battery voltage between 9 and 16 volts

1. Set Condition: FCM detects 5 volts on the Transfer Case Range Position Sensor signal circuit for 2 seconds

Scheme 113

Scheme 114

Scheme 115

Scheme 116

Scheme 117

1. CHECK THE T-CASE POSITION SENSOR VOLTAGE ABOVE 4.8 VOLTS NOTE: If both DTCs C140B and C1405 are present, check fuse 8 and fuse 42 in the Integrated Power Module (IPM) before continuing with diagnosis. Ignition on, engine not running. With the scan tool under Data Display, read the T-Case Position Sensor voltage. Is the voltage above 4.8 volts? Yes Go to step 2 No Go to step 8
2. (T103) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position Disconnect the Shift Motor/Mode Sensor connector. Ignition on, engine not running. Measure the voltage of the (T103) 5 Volt Supply circuit. Is the voltage above 5.5 volts? Yes Repair the (T103) 5 Volt Supply circuit for a short to voltage. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. (D201) MODE SENSOR A CIRCUIT SHORTED TO VOLTAGE Measure the voltage of the (D201) Mode Sensor A circuit. Is the voltage above 5.5 volts? Yes Repair the (D201) Mode Sensor A circuit for a short to voltage. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. SHIFT MOTOR/MODE SENSOR ASSEMBLY Turn the ignition off to the lock position Connect a jumper wire between the (G180) FCM Sensor Return circuit and the (D201) Mode Sensor A circuit in the Shift Motor/Mode Sensor harness connector. Ignition on, engine not running. With the scan tool under Data Display, read the T-Case Position Sensor voltage. NOTE: Remove the jumper wire before continuing. Is the voltage below 0.2 of a volt? Yes Replace the Shift Motor/Mode Sensor assembly in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 5
5. (D201) MODE SENSOR A CIRCUIT OPEN Turn the ignition off to the lock position Disconnect the FCM C1 harness connector. Measure the resistance of the (D201) Mode Sensor A circuit between the FCM C1 harness connector and the Shift Motor/Mode Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (D201) Mode Sensor A circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 6
6. (G180) FCM SENSOR RETURN CIRCUIT OPEN Measure the resistance of the (G180) FCM Sensor Return circuit between the Shift Motor/Mode Sensor harness connector and the FCM IPM harness connector. Is the resistance above 5.0 Ohms? Yes Go to step 7 No Replace the Front Control Module in accordance with the Service information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
7. (G180) FCM SENSOR RETURN CIRCUIT OPEN (IPM) Disconnect the Integrated Power Module C1 harness connector. Measure the resistance of the (G180) FCM Sensor Return circuit between the Shift Motor/Mode Sensor harness connector and the Integrated Power Module C1 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (G180) FCM Sensor Return circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Integrated Power Module in accordance with the Service information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
8. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

Scheme 118

1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Control Module detects that the Transfer Case Motor Lock circuit diagnostic input is low when output is off.

Scheme 119

Scheme 120

Scheme 121

1. DTC IS ACTIVE Start the engine and allow it to idle. Move the Transfer Case Selector Switch to each position several times. With the scan tool, select View DTCs in the FCM. Is the status Active for this DTC? Yes Go to step 2 No Go to step 6
2. (T313) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off to the lock position. Disconnect the Transfer Case Motor harness connector. Disconnect the Front Control Module IPM harness connector. Measure the resistance between ground and the (T313) Transfer Case Motor Lock Signal circuit. Is the resistance below 5.0 Ohms? Yes Repair the (T313) Transfer Case Motor Lock Signal circuit for a short to ground. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. ACTUATE T-CASE MOTOR Reconnect the Front Control Module IPM harness connector. Ignition on, engine not running. With the scan tool, actuate the T-Case Motor Solenoid Lock. Using a 12-volt test light connected to 12-volts, check the (T313) Transfer Case Motor Lock Signal circuit with the circuit actuated. NOTE: Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to step 5 No Go to step 4
4. (T313) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT OPEN Turn the ignition off to the lock position. Disconnect the Front Control Module IPM harness connector. Measure the resistance of the (T313) Transfer Case Motor Lock Signal circuit between the Front Control Module IPM harness connector and the Transfer Case Motor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T313) Transfer Case Motor Lock Signal circuit for an open circuit or high resistance. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 5
5. FRONT CONTROL MODULE Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
6. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

1. When Monitored: With the ignition on and no undervoltage or overvoltage condition present.

1. Set Condition: The Front Control Module detects that the Transfer Case Motor Lock Circuit diagnostic input is high when the output is on.

Scheme 122

Scheme 123

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, Clear DTCs. Move the Shift control to each position. With the scan tool, select View DTCs in the FCM. Does the DTC reset? Yes Go to step 2 No Go to step 5
2. (T313) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position Disconnect the Transfer Case Motor harness connector. Disconnect the Front Control Module IPM harness connector. Ignition on, engine not running. Measure the voltage of the (T313) Transfer Case Motor Lock Signal circuit. Is there any voltage present? Yes Repair the (T313) Transfer Case Motor Lock Signal circuit for a short to voltage. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. (T313) TRANSFER CASE MOTOR LOCK SIGNAL CIRCUIT SHORTED TO THE (A924) FUSED BATTERY SUPPLY CIRCUIT Measure the resistance between the (T313) Transfer Case Motor Brake Signal circuit and the (A924) Fused Battery Supply circuit. Is the resistance below 5.0 ohms? Yes Repair the (T313) Transfer Case Motor Brake Signal circuit for a short to the Fused Battery Supply circuit. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. TRANSFER CASE MOTOR Turn the ignition off to the lock position Reconnect the Front Control Module IPM harness connector. Ignition on, engine not running. With the scan tool, Clear the DTCs in the FCM. With the scan tool, select View DTCs in the FCM. Does the DTC P1407-Transfer Case Brake Control Circuit Low set? Yes Replace the Transfer Case Motor assembly in accordance with service Information. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
5. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

1. When Monitored: Ignition on. Battery voltage between 9 and 16 volts.

1. Set Condition: FCM detects low voltage on the Transfer Case Motor Control Circuit for 0.5 seconds.

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

Scheme 129

Scheme 130

Scheme 131

1. DTC IS ACTIVE NOTE: If both DTCs C140B and C1405 are present, check fuse 8 and fuse 42 in the Integrated Power Module (IPM) before continuing with diagnosis. Ignition on, engine not running. With the scan tool, read the FCM DTCs. Is the status Active for this DTC? Yes Go to step 2 No Go to step 16
2. SHIFT MOTOR CIRCUIT RESISTANCE Turn the ignition off to the lock position Remove the Front Control Module (FCM) from the Integrated Power Module (IPM). Measure the resistance between the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the FCM connector in the IPM. Is the resistance between 40 and 100 Ohms? Yes Go to step 15 No Go to step 3
3. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance of the (T315) Shift Motor Control A circuit between the Shift Motor/Mode Sensor Assembly harness connector and the FCM IPM harness connector. Is the resistance above 5.0 Ohms? Yes Go to step 4 No Go to step 5
4. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance of the (T315) Shift Motor Control A circuit between the Shift Motor/Mode Sensor Assembly harness connector and the Integrated Power Module C5 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T315) Shift Motor Control A circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 14
5. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN Measure the resistance of the (T316) Shift Motor Control B circuit between the Shift Motor/Mode Sensor Assembly harness connector and the FCM harness connector in the IPM. Is the resistance above 5.0 Ohms? Yes Go to step 6 No Go to step 7
6. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance of the (T316) Shift Motor Control B circuit between the Shift Motor/Mode Sensor Assembly harness connector and the Integrated Power Module C5 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T316) Shift Motor Control B circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 14
7. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T315) Shift Motor Control A circuit. Is the resistance below 5.0 Ohms? Yes Go to step 8 No Go to step 9
8. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO GROUND (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance between ground and the (T315) Shift Motor Control A circuit. Is the resistance below 5.0 Ohms? Yes Repair the (T315) Shift Motor Control A circuit for a short to ground. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 14
9. (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (T316) Shift Motor Control B circuit. Is the resistance below 5.0 Ohms? Yes Go to step 10 No Go to step 11
10. (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO GROUND (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance between ground and the (T316) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance below 5.0 Ohms? Yes Repair the (T316) Shift Motor Control B circuit for a short to ground. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 14
11. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT Measure the resistance between (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance below 5.0 Ohms? Yes Go to step 12 No Go to step 13
12. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance between (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance below 5.0 Ohms? Yes Repair the (T315) Shift Motor Control A circuit for a short to the (T316) Shift Motor Control B circuit. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 14
13. SHIFT MOTOR/MODE SENSOR ASSEMBLY Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Shift Motor/Mode Sensor assembly in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
14. INTEGRATED POWER MODULE Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Integrated Power Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
15. FRONT CONTROL MODULE Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
16. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

1. When Monitored: Ignition on. Battery voltage between 9 and 16 volts.

1. Set Condition: The FCM detects high voltage on the Transfer Case Motor Control Circuit for 2 seconds.

Scheme 132

Scheme 133

1. DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read the FCM DTCs. Is the status Active for this DTC? Yes Go to step 2 No Go to step 14
2. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO VOLTAGE Turn the ignition off to the lock position Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Remove the Front Control Module (FCM) from the Integrated Power Module (IPM). Ignition on, engine not running. Measure the voltage of the (T315) Shift Motor Control A circuit. Is there any voltage present? Yes Repair the (T315) Shift Motor Control A circuit for a short to voltage. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 3
3. (T316) SHIFT MOTOR CONTROL B CIRCUIT SHORTED TO VOLTAGE Measure the voltage of the (T316) Shift Motor Control B circuit. Is there any voltage present? Yes Repair the (T316) Shift Motor Control B circuit for a short to voltage. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 4
4. SHIFT MOTOR CIRCUIT RESISTANCE AT FCM CONNECTOR Turn the ignition off to the lock position Reconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance between the (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit in the FCM harness connector of the IPM. Is the resistance between 40 and 100 Ohms? Yes Go to step 13 No Go to step 5
5. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN Disconnect the Shift Motor/Mode Sensor Assembly harness connector. Measure the resistance of the (T315) Shift Motor Control A circuit between the Shift Motor/Mode Sensor Assembly harness connector and the FCM harness connector in the IPM. Is the resistance above 5.0 Ohms? Yes Go to step 6 No Go to step 7
6. (T315) SHIFT MOTOR CONTROL A CIRCUIT OPEN (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance of the (T315) Shift Motor Control A circuit between the Shift Motor/Mode Sensor Assembly harness connector and the Integrated Power Module C5 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T315) Shift Motor Control A circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 12
7. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN Measure the resistance of the (T316) Shift Motor Control B circuit between the Shift Motor/Mode Sensor Assembly harness connector and the FCM harness connector in the IPM. Is the resistance above 5.0 Ohms? Yes Go to step 8 No Go to step 9
8. (T316) SHIFT MOTOR CONTROL B CIRCUIT OPEN (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance of the (T316) Shift Motor Control B circuit between the Shift Motor/Mode Sensor Assembly harness connector and the Integrated Power Module C5 harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (T316) Shift Motor Control B circuit for an open. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 12
9. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT Measure the resistance between (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance below 5.0 Ohms? Yes Go to step 10 No Go to step 11
10. (T315) SHIFT MOTOR CONTROL A CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B CIRCUIT (IPM) Disconnect the Integrated Power Module C5 harness connector. Measure the resistance between (T315) Shift Motor Control A circuit and the (T316) Shift Motor Control B circuit at the Shift Motor/Mode Sensor Assembly harness connector. Is the resistance below 5.0 Ohms? Yes Repair the (T315) Shift Motor Control A circuit for a short to the (T316) Shift Motor Control B circuit. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Go to step 12
11. SHIFT MOTOR/MODE SENSOR ASSEMBLY Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Shift Motor/Mode Sensor assembly in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
12. INTEGRATED POWER MODULE Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Integrated Power Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
13. FRONT CONTROL MODULE Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and connectors that pertain to this circuit. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module in accordance with the Service Information. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
14. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors. Look for the data to change or for the DTC to reset during the wiggle test. Were any problems found? Yes Repair as necessary. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Test complete.

1. When Monitored: With the ignition on and no system undervoltage or overvoltage condition present.

1. Set Condition: The Front Control Module (FCM) is unable to engage the requested range.

1. When Monitored: With the ignition on.

1. Set Condition: The Front Control Module (FCM) detects a short in either CAN C Bus circuit.

Scheme 134

Scheme 135

Scheme 136

Scheme 137

Scheme 138

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. ANTILOCK BRAKE MODULE - INTERNAL SHORT Turn the ignition off. Disconnect the Antilock Brake Module harness connector. Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 3 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Antilock Brake Module in accordance with the Service Information. Perform the ABS VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure»(ref-352635-S25485935042010010600000)
3. POWERTRAIN CONTROL MODULE - INTERNAL SHORT Turn the ignition off. Disconnect the Powertrain Control Module C1 harness connector. Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 4 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Powertrain Control Module in accordance with the Service Information. Perform the (NGC) POWERTRAIN VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure»(ref-352681-S03115589192010010600000)
4. OCCUPANT RESTRAINT CONTROLLER- INTERNAL SHORT Turn the ignition off. WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. Disconnect the Occupant Restraint Controller harness connectors. Turn the ignition on. WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 5 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Occupant Restraint Controller in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
5. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Turn the ignition on. Measure the voltage between the (D65) CAN C Bus (+) circuit and ground. Is there any voltage present? Yes Repair the (D65) CAN C Bus (+) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 6
6. (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE Measure the voltage between the (D64) CAN C Bus (-) circuit and ground. Is there any voltage present? Yes Repair the (D64) CAN C Bus (-) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 7
7. (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Measure the resistance between ground and the (D65) CAN C Bus (+) circuit. Is any resistance present? Yes Repair the (D65) CAN C Bus (+) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 8
8. (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (D64) CAN C Bus (-) circuit. Is any resistance present? Yes Repair the (D64) CAN C Bus (-) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 9
9. (D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT Measure the resistance between the (D65) CAN C Bus (+) circuit and the (D64) CAN C Bus (-) circuit. Is any resistance present? Yes Repair the (D65) CAN C Bus (+) circuit for a short to the (D64) CAN C Bus (-) circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Inspect the wiring and connectors for damage or shorted circuits. Ensure both CAN C Bus circuits are not open at the FCM. If OK, replace and program the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 139

1. When Monitored: With the ignition on and battery voltage between 10 and 16 volts.

1. Set Condition: The Front Control Module (FCM) detects the (D55) CAN B Bus (+) circuit is open.

Scheme 140

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. ATTEMPT TO ISOLATE THE OPEN CONDITION Turn the ignition on. Verify that all CAN B Bus modules are communicating with the scan tool. NOTE: A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network. NOTE: If any module is not communicating, perform the appropriate no response test procedure before proceeding. Turn the ignition off. Gain access to the Front Control Module C1 harness connector, but do not disconnect. Using a fused jumper wire, connect one end to ground and with the other end backprobe the CAN B Bus (-) circuit at the FCM C1 harness connector. Turn the ignition on. With the scan tool monitor the network status screen and document all modules that display a red X. Are there any red "X's" displayed next to the modules? Yes Go to step 3 No Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. ATTEMPT TO ISOLATE THE OPEN CONDITION - MULTIPLE RED X'S With the scan tool continue monitoring the network status screen. Are there multiple red "X's" displayed next to the modules? Yes The most likely cause of this condition is an open CAN B Bus (+) circuit between a common CAN B Bus splice and the modules that display the red X next to them. Use «SYSTEM WIRING DIAGRAMS»(ref-313023) will help you determine where open condition exists. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 4
4. (D55) CAN B BUS (+) CIRCUIT OPEN - SINGLE RED X Turn the ignition off. Disconnect the module that has the red "X" displayed next to it. Turn the ignition on. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground. Is there any voltage present? Yes Inspect the connector and terminal for damage, inspect for spread terminals, or push out terminals. If OK, replace the module that displayed the red "X" next to it in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Repair the (D55) CAN B Bus (+) circuit for an open between the next common splice and the module that has the red "X" displayed next to it. Use «SYSTEM WIRING DIAGRAMS»(ref-313023) will help you determine where open condition exists. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously.

1. Set Condition: The Front Control Module (FCM) detects the (D55) CAN B Bus (+) circuit is shorted to ground.

Scheme 141

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Measure the resistance between ground and the (D55) CAN B Bus (+) circuit. Is resistance below 1000.0 ohms? Yes Go to step 3 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. (D55) CAN B BUS (+) CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (D55) CAN B Bus (+) circuit. While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time. NOTE: This is to determine if the short to ground is internal within a module or if the circuit is shorted. NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to «SYSTEM WIRING DIAGRAMS»(ref-313023) to assist in diagnosis. Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected? Yes Repair the (D55) CAN B Bus (+) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the module that when disconnected the short to ground was eliminated, in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously

1. Set Condition: The Front Control Module (FCM) detects the (D55) CAN B Bus (+) circuit is shorted to voltage.

Scheme 142

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Turn the ignition on. Measure the voltage between the (D55) CAN B Bus (+) circuit and ground. Is voltage above 10.0 volts? Yes Go to step 3 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. (D55) CAN B BUS (+) CIRCUIT SHORTED TO VOLTAGE Measure the voltage between the (D55) CAN B Bus (+) circuit and ground. While monitoring the voltmeter, disconnect each CAN B Bus module one at a time. NOTE: When performing the above step, turn the ignition off (wait one minute) before disconnecting any module. When the module is disconnected turn the ignition on to check for a short to voltage. NOTE: This is to determine if the short to voltage is internal within a module or if the circuit is shorted. NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to «SYSTEM WIRING DIAGRAMS»(ref-313023) to assist in diagnosis. Is the voltage above 10.0 volts with all the CAN B Bus modules disconnected? Yes Repair the (D55) CAN B Bus (+) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the module that when disconnected the short to voltage was eliminated, in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: With the ignition on and battery voltage between 10 and 16 volts.

1. Set Condition: The Front Control Module (FCM) detects the (D54) CAN B Bus (-) circuit is open.

Scheme 143

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. ATTEMPT TO ISOLATE THE OPEN CONDITION Turn the ignition on. Verify that all CAN B Bus modules are communicating with the scan tool. NOTE: A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network. NOTE: If any module is not communicating, perform the appropriate no response test procedure before proceeding. Turn the ignition off. Gain access to the Front Control Module C1 harness connector, but do not disconnect. Using a fused jumper wire, connect one end to ground and with the other end backprobe the CAN B Bus (+) circuit at the FCM C1 harness connector. Turn the ignition on. With the scan tool monitor the network status screen and document all modules that display a red "X". Are there any red "X's" displayed next to the modules? Yes Go to step 3 No Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. ATTEMPT TO ISOLATE THE OPEN CONDITION - MULTIPLE RED X'S With the scan tool continue monitoring the network status screen. Are there multiple red "X's" displayed next to the modules? Yes The most likely cause of this condition is an open CAN B Bus (-) circuit between a common CAN B Bus splice and the modules that display the red "X" next to them. Use «SYSTEM WIRING DIAGRAMS»(ref-313023) will help you determine where open condition exists. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Go to step 4
4. (D54) CAN B BUS (-) CIRCUIT OPEN - SINGLE RED X Turn the ignition off. Disconnect the module that has the red "X" displayed next to it. Turn the ignition on. Measure the voltage between the (D54) CAN B Bus (-) circuit and ground. Is there any voltage present? Yes Inspect the connector and terminal for damage, inspect for spread terminals, or push out terminals. If OK, replace the module that displayed the red "X" next to it in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Repair the (D54) CAN B Bus (-) circuit for an open between the next common splice and the module that has the red "X" displayed next to it. Use «SYSTEM WIRING DIAGRAMS»(ref-313023) will help you determine where open condition exists. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously

1. Set Condition: The Front Control Module (FCM) detects the (D54) CAN B Bus (-) circuit is shorted to ground.

Scheme 144

Scheme 145

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Measure the resistance between ground and the (D54) CAN B Bus (-) circuit. Is resistance below 1000.0 ohms? Yes Go to step 3 No Go to step 4
3. (D54) CAN B BUS (-) CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (D54) CAN B Bus (-) circuit. While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time. NOTE: This is to determine if the short to ground is internal within a module or if the circuit is shorted. NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to «SYSTEM WIRING DIAGRAMS»(ref-313023) to assist in diagnosis. Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected? Yes Repair the (D54) CAN B Bus (-) circuit for a short to ground. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the module that when disconnected the short to ground was eliminated, in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
4. CHECK THE (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO THE (D54) CAN B BUS (-) CIRCUIT Measure the resistance between the (D55) CAN B Bus (+) circuit and (D54) CAN B Bus (-) circuit. Is resistance below 1000.0 ohms? Yes Go to step 5 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
5. (D55) CAN B BUS (+) CIRCUIT SHORTED TO THE (D54) CAN B BUS (-) CIRCUIT Measure the resistance between the (D55) CAN B Bus (+) circuit and (D54) CAN B Bus (-) circuit. While monitoring the ohmmeter, disconnect each CAN B Bus module one at a time. NOTE: This is to determine if the short together is internal within a module or if the circuits are shorted together. NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to «SYSTEM WIRING DIAGRAMS»(ref-313023) to assist in diagnosis. Is resistance below 1000.0 ohms with all the CAN B Bus modules disconnected? Yes Repair the (D55) CAN B Bus (+) circuit for a short to the (D54) CAN B Bus (-) circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the module that when disconnected the short to ground was eliminated, in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously

1. Set Condition: The Front Control Module (FCM) detects the (D54) CAN B Bus (-) circuit is shorted to voltage.

Scheme 146

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTCs. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The conditions that caused this code to set are not present at this time. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect the wiring and connectors.
2. CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Turn the ignition on. Measure the voltage between the (D54) CAN B Bus (-) circuit and ground. Is voltage above 10.0 volts? Yes Go to step 3 No Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
3. (D54) CAN B BUS (-) CIRCUIT SHORTED TO VOLTAGE Measure the voltage between the (D54) CAN B Bus (-) circuit and ground. While monitoring the voltmeter, disconnect each CAN B Bus module one at a time. NOTE: When performing the above step, turn the ignition off (wait one minute) before disconnecting any module. When the module is disconnected turn the ignition on to check for a short to voltage. NOTE: This is to determine if the short to voltage is internal within a module or if the circuit is shorted. NOTE: Disconnecting an inline connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to «SYSTEM WIRING DIAGRAMS»(ref-313023) to assist in diagnosis. Is the voltage above 10.0 volts with all the CAN B Bus modules disconnected? Yes Repair the (D54) CAN B Bus (-) circuit for a short to voltage. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the module that when disconnected the short to voltage was eliminated, in accordance with the Service Information. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. When Monitored: Continuously

1. Set Condition: The Front Control Module (FCM) detects the (D55) CAN B Bus (+) circuit is shorted to the (D54) CAN B Bus (-) circuit.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the ECM/PCM for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the TCM for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Antilock Brake Module for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Front Control Module for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Occupant Restraint Controller for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Cluster/CCN for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Electronic Overhead Module (EOM) for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the A/C Heater Control (HVAC) for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Sentry Key remote Entry Module (SKREEM) also known as the Wireless Control Module (WCM) for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Radio for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Amplifier for approximately 2 to 5 seconds.

1. When Monitored: With the ignition on. Battery voltage between 10 and 16 volts. IOD fuse installed. Front Control Module (FCM) is configured correctly.

1. Set Condition: Bus messages not received from the Satellite Receiver (SDAR) for approximately 2 to 5 seconds.

1. When Monitored: Continuously with the ignition on, one valid CAN ID received at least once, and no U0002-CAN Bus Off Performance DTC present.

1. Set Condition: When the Front Control Module (FCM) detects an incorrect CAN ID is sent from the CLUSTER/CCN.

1. When Monitored: Continuously.

1. Set Condition: The Front Control Module (FCM) detects an additional CAN B module and requires a reconfiguration.