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

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Scheme 1

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Clear all FCM DTCs. Turn the Left Turn Signal on. With the scan tool, read DTCs. Does the scan tool read: B163C-FRONT LEFT TURN 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. L61 LEFT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the FCM C2 connector. Measure the resistance of the (L61) Front Left Turn Signal Control circuit. Is the resistance above 5.0 Ohms? No Repair the (L61) Turn Signal Control circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the Front Control Module from the IPM 49-way connector. Measure the voltage between (L61) Front Left Turn Signal Control circuit and ground. Is there any voltage present? 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 2

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Clear all FCM DTCs Turn the Right Turn Signal on. With the scan tool, read DTCs. Does the scan tool read: B1640-FRONT RIGHT TURN 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. L60 RIGHT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the IPM connector from the FCM. Measure the resistance of the (L60) Front Right Turn Signal Control circuit. Is the resistance above 5.0 ohms? No Repair the (L60) Turn Signal Control circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) Yes Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the Front Control Module from the IPM 49 way connector. Measure the voltage between (L60) Front Right Turn Signal Control circuit and ground. Is there any voltage present? Yes Replace the Power Distribution Center. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Replace the Front Control Module. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 3

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Clear all FCM DTCs. Turn the Left Turn Signal on. With the scan tool, read DTCs. Does the scan tool read: B1644-REAR LEFT TURN 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. L63 LEFT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the PDM connector from the FCM. Measure the resistance of the (L63) Left Rear Turn Signal Control circuit. Is the resistance above 5.0 Ohms? No Repair the (L63) Turn Signal Control circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the Front Control Module from the PDM 49 way connector. Measure the voltage between (L63) Left Rear Turn Signal Control circuit and ground. Is there any voltage present? Yes Replace the Power Distribution Center. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 4

1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. Clear all FCM DTCs. Turn the Right Turn Signal on. With the scan tool, read DTCs. Does the scan tool read: B1648-REAR RIGHT TURN 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. L62 RIGHT TURN SIGNAL CONTROL CIRCUIT Turn the ignition off. Disconnect the PDM connector from the FCM. Measure the resistance of the (L62) Right Rear Turn Signal Control circuit. Is the resistance above 5.0 Ohms? No Repair the (L62) Turn Signal Control circuit. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . Yes Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Disconnect the Front Control Module from the PDM 49 way connector. Measure the voltage between (L62) Right Rear Turn Signal Control circuit and ground. Is there any voltage present? Yes Replace the Power Distribution Center. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) . No Replace the Front Control Module. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 5

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: B1670-RIGHT 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. TRAILER TOW RELAY Turn the ignition off. Remove and install a known good relay in place of the Right Trailer Tow Relay. Do the Trailer Tow Lamps operate normally? Yes Replace the Right 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 Right Trailer Tow Relay from the MPD. Remove the FCM from the Module Power Distribution. Measure the voltage of the (L656) Right 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 6

1. CHECK FOR ANY POWERTRAIN CONTROL MODULE (PCM) DTCS NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing. NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output. NOTE: Make sure the generator drive belt is in good operating condition. NOTE: Inspect the fuses in the IPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage. Turn the ignition on. With the scan tool, read active PCM DTCs. Does the scan tool display any active PCM DTCs? Yes Go to and perform the appropriate diagnostic procedure. No Check the above conditions that can cause a low voltage condition. Repair as necessary. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

1. CHECK FOR ANY POWERTRAIN CONTROL MODULE (PCM) DTCS NOTE: Make sure the Battery is in good condition. Using the Midtronics Battery Tester, test the Battery before continuing. NOTE: Inspect the vehicle for after market accessories that may exceed the Generator System output. NOTE: Make sure the generator drive belt is in good operating condition. NOTE: Inspect the fuses in the IPM. If an open fuse is found, use the wire diagram/schematic as a guide, inspect the wiring and connectors for damage. Turn the ignition on. With the scan tool, read active PCM DTCs. Does the scan tool display any active PCM DTCs? Yes Go to and perform the appropriate diagnostic procedure. No Check the above conditions that can cause a high voltage condition. Repair as necessary. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)

Scheme 7

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. LEFT TRAILER TOW RELAY Turn the ignition off. Install a substitute relay in place of the original Left Trailer Tow 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 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) . No Replace the original Left Trailer Tow Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

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. LEFT TRAILER TOW RELAY Turn the ignition off. Install a substitute relay in place of the original Left Trailer Tow 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 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) . No Replace the original Left Trailer Tow Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

Scheme 8

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. RUN/START RELAY Turn the ignition off. NOTE: Check the PDC fuses before continuing. Install a substitute relay in place of the original Run/Start 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 Run/Start Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. (K617) RUN/START RELAY CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Remove the FCM from the Integrated Power Module (IPM). Remove the Run/Start Relay. Measure the resistance between ground and the (K617) Run/Start Relay Control circuit at the relay cavity (85). Is the resistance below 100.0 Ohms? Yes Repair the (K617) Run/Start Relay 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) . 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. 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. RUN/START RELAY Turn the ignition off. Install a substitute relay in place of the original Run/Start 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 Run/Start Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. (K617) RUN/START RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Remove the FCM from the Integrated Power Module (IPM). Remove the Run/Start Relay. Turn the ignition on. Measure the voltage of the (K617) Run/Start Relay Control circuit at the relay connector (cavity 85). Is there any voltage present? Yes Repair the (K617) Run/Start Relay Control 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 (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 9

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 RELAY Turn the ignition off. NOTE: Check the fuses before continuing. Install a substitute relay in place of the original Ignition Run 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 Ignition Run Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. BLOWER MOTOR RELAY Turn the ignition off. NOTE: Check the IPM fuses before continuing. Install a substitute relay in place of the original Blower Motor 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 4 No Replace the original Blower Motor Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. IGNITION RUN RELAY CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Remove the FCM from the IPM. Remove the Blower Motor Relay and the Ignition Run Relay. Measure the resistance between ground and the Ignition Run 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. 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 RELAY Turn the ignition off. NOTE: Check the fuses before continuing. Install a substitute relay in place of the original Ignition Run 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 Ignition Run Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
3. BLOWER MOTOR RELAY Turn the ignition off. NOTE: Check the IPM fuses before continuing. Install a substitute relay in place of the original Blower Motor 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 4 No Replace the original Blower Motor Relay. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. IGNITION RUN RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Remove the FCM from the IPM. Remove the Blower Motor Relay and the Ignition Run Relay. Measure the voltage of the Ignition Run Relay Control circuit at a relay cavity 85. 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 10

1. REPLACE THE FRONT CONTROL MODULE IF DTC IS ACTIVE With the scan tool, read the active DTCs. Does the scan tool display this DTC as active? Yes 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) . 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) .

Scheme 11

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: B2302-WIPER MODE 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 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. Is the resistance above 5.0 Ohms? Yes Repair the (W52) MUX circuit for an open 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 12

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Front Wipers on. With the scan tool, read the Front Wiper DTCs. Does the scan tool read: B2305-WIPER PARK 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 Turn the ignition off. Disconnect the Multifunction Switch connector. Measure the internal resistance of the Multifunction Switch between cavity 2 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 of the (W7) Front Wiper Park Switch Sense circuit. Is the resistance above 5.0 Ohms? Yes Repair the (W7) Front Wiper Park Switch Sense circuit for an open 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) .

Scheme 13

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: B2314-WIPER ON/OFF 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. WIPER ON/OFF RELAY Turn the ignition off. Remove the Wiper On/Off Relay. Turn the ignition on. Activate the Wiper Switch to all speed positions. With the scan tool, read the DTCs. Does the scan tool read: B2314-WIPER ON/OFF CONTROL CIRCUIT HIGH? Yes 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) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Wiper On/Off Relay. Disconnect the FCM IPM harness connector. Measure the voltage between ground and the (W5) Wiper On/Off Relay Control circuit in the IPM. 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 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 14

1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all FCM DTCs. Turn the Wipers to Low then High. With the scan tool, read the Wiper DTCs. Does the scan tool read: B2318-WIPER HI/LOW 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. WIPER HIGH/LOW RELAY Turn the ignition off. Remove the Wiper Hi/Low Relay. Turn the ignition on. Activate the Wiper Switch to all speed positions. With the scan tool, read the DTCs. Does the scan tool read: B2318-WIPER HI/LOW CONTROL CIRCUIT HIGH? Yes 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) . No Go to step 3
3. FRONT CONTROL MODULE Turn the ignition off. Remove the Wiper Hi/Low Relay. Disconnect the FCM C3 harness connector. Measure the voltage between ground and the (W2) Wiper Hi/Low Relay Control circuit in the IPM. Is there any voltage present? 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 15

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: B2320-FRONT/REAR WASHER MOTOR 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. (W10) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE Turn the ignition off. Disconnect the IPM C4 harness connector. Disconnect the Washer Pump Motor harness connector. Turn the ignition on. Measure the voltage of the (W10) Washer Pump Motor Control circuit. Is the voltage above 5.0 volts? Yes Repair the (W10) Washer Pump Motor Control 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. (W20) WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO VOLTAGE Disconnect the IPM C5 harness connector. Measure the Voltage of the (W20) Washer Pump Motor Control circuit. Is the voltage above 5.0 volts? Yes Repair the (W20) Washer Pump Motor Control 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 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 16

1. DTC IS ACTIVE Ignition on, engine off. With the scan tool, read the Front Control Module (FCM) DTCs. Is the status Active for this DTC? Yes Go to step 2 No Go to step 5
2. TRANSFER CASE INTERNAL CONDITION Turn the ignition off to the lock position. Inspect the Transfer Case in accordance with the Service Information to determine if there are any mechanical conditions that are preventing the Shift Motor from engaging the requested range. Are any mechanical conditions preventing the Shift Motor from engaging the requested range? Yes Repair or replace the Transfer Case 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 3
3. TRANSFER CASE MOTOR Turn the ignition off to the lock position. Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and harness connectors that pertain to this circuit. If any problems are found, repair as necessary and retest. If no other problems are found, replace the Transfer Case Motor in accordance with the Service Information. Ignition on, engine off. Cycle the Transfer Case Selector Switch to each position several times during a test drive. With the scan tool, read the Front Control Module (FCM) DTCs. Is the DTC status Active? Yes Go to step 4 No Test complete. Perform the TRANSFER CASE VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .
4. FRONT CONTROL MODULE (FCM) Using the «SYSTEM WIRING DIAGRAMS»(ref-313023) as a guide, inspect all wiring and harness 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 (FCM) 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. 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 17

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 THE (D54) CAN B BUS (-) CIRCUIT Turn the ignition off. Disconnect the Front Control Module C1 harness connector. 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 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 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 together 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)

Scheme 18

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE ECM/PCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the ECM/PCM is active on the bus. Is the ECM/PCM active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ECM/PCM? Yes Replace/update the ECM/PCM in accordance with the Service Information. Perform the appropriate VERIFICATION TEST. No Replace/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE TCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the TCM is active on the bus. Is the TCM active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the TCM? Yes Replace/update the TCM (PCM) in accordance with the Service Information. Perform the appropriate POWERTRAIN VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure»(ref-352681-S03115589192010010600000) No Replace/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE ABS IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the ABS is active on the bus. Is the ABS active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ABS? Yes Replace/update 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) No Replace/update the module that set this DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE FCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the FCM is active on the bus. Is the FCM active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the FCM? Yes Replace/update 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) No Replace/update the module that set this DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE ORC IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the ORC is active on the bus. Is the ORC active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the ORC? Yes Replace/update the Occupant Restraint Controller in accordance with the Service Information. Perform the ORC VERIFICATION TEST. Refer to «DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure»(ref-352673-S08486427102010010600000) No Replace/update the module that set this DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE CCN IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the CCN is active on the bus. Is the CCN active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the CCN? Yes Replace/update the Cluster (CCN) 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/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read all active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE EOM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the EOM is active on the bus. Is the EOM active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the EOM? Yes Replace/update the Electronic Overhead Module (EOM) 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/update the module that set this DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE HVAC IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the HVAC is active on the bus. Is the HVAC active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the HVAC? Yes Replace/update the A/C Heater 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) No Replace/update the module that set the DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE WCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the WCM is active on the bus. Is the WCM active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the WCM? Yes Replace/update the Sentry Key Remote Entry Module in accordance with the Service Information. Perform the WCM VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure»(ref-352678-S27815392192010010600000) No Replace/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE RADIO IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the Radio is active on the bus. Is the Radio active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the Radio? Yes Replace/update the Radio 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/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE AMPLIFIER IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the Amplifier is active on the bus. Is the Amplifier active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the Amplifier? Yes Replace/update the Amplifier 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/update the module that set this DTC in accordance with the Service Information. Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Refer to the Stored Lost Communication test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. VERIFY THAT THE SATELLITE RECEIVER IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the SDARS is active on the bus. Is the SDARS active on the bus? Yes Go to step 4 No Refer to the No Response test procedure. Refer to «Non-DTC Diagnostics/Communication - Diagnosis and Testing»(ref-352682-S21760282022010010600000)
4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the SDARS? Yes Replace/update the Satellite Receiver 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/update the module that set the DTC in accordance with the Service Information Perform the appropriate VERIFICATION TEST.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read active DTCs. Is this DTC active? Yes Go to step 2 No Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS With the scan tool, read active DTCs from all modules. NOTE: Check for FCM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs. Does the scan tool display any active DTCs to the conditions listed above? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 3
3. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs "Logged Against" the Front Control Module? Yes Go to and perform the appropriate diagnostic procedure. No Go to step 4
4. RESET/RECONFIGURE THE FRONT CONTROL MODULE Turn the ignition on. With the scan tool, select ECU View. This will list the modules on the vehicle. Read and record the listed modules. NOTE: A Scan Report will list all the modules on the vehicle. With the scan tool, select the FCM and then press Miscellaneous Functions. Press Reset ECU. Cycle the ignition from on to off 3 times and read the active FCM DTCs. Does the scan tool display this DTC as active? Yes Retest the system and attempt to reset the FCM. If the DTC remains active 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) . No Repair is complete. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. RECONFIGURE THE FRONT CONTROL MODULE Turn the ignition on. With the scan tool, select network view and press the gateway button. This will list the CAN modules on the vehicle. Read and record the listed modules. With the scan tool, select FCM, miscellaneous functions then add/remove ECUs. With the scan tool, add or remove the module that was not configured in the FCM. With the scan tool, erase DTCs. Cycle the ignition from on to off 3 times and read the active FCM DTCs. Does the scan tool display this DTC as active? Yes Retest system and attempt to reconfigure the FCM. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Repair is complete. Perform the BODY VERIFICATION TEST. See «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) .

1. PERFORM BODY VERIFICATION TEST NOTE: If the Sentry Key remote Entry Module (SKREEM) also known as the Wireless Control Module (WCM), Powertrain Control Module (PCM) or Totally Integrated Power Module (TIPM) was replaced, refer to the Service Information for proper programming procedures. Disconnect all jumper wires and reconnect all previously disconnected components and connectors. Ensure that all accessories are turned off. Ensure that the battery is fully charged. If the Instrument Cluster was replaced, disconnect the negative battery cable for 5 seconds to power down the TIPM. Then, reconnect the battery negative cable and turn the ignition on for 15 seconds to allow the Instrument Cluster to learn the VIN. If the Instrument Cluster was replaced and the vehicle is equipped with VTSS, cycle the key in the driver door cylinder lock switch to enable VTSS. Program the tire size, the country code, the radio EQ setting, all of the RKE transmitters (if WCM was replaced), and all other options as necessary. With the scan tool, record and erase all DTCs from ALL modules. Turn the ignition off, wait 5 seconds, then turn the ignition on. If repairs were made to any of the HVAC door actuator circuits, with the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. The test must pass before proceeding to the next step. If repairs were made to any of the HVAC doors, linkage, door actuators, or door actuator circuits, with the scan tool in HVAC, select System Tests and then select Actuator Calibration Test. The test must pass before proceeding to the next step. Start and run the engine for 2 minutes while operating all functions of the system that caused the original concern. With the scan tool, select ECU View and check for DTCs in the modules. Are DTCs present in any module or is the original condition still present? Yes The repair is not complete. Go to and perform the appropriate diagnostic procedure. No The repair is complete.

TRANSFER CASE VERIFICATION TEST

1. Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
2. With the scan tool, select clear Stored DTCs.
3. Make sure that all accessories are turned off and that the battery is fully charged.
4. Test drive the vehicle in each Transfer Case range and verify proper operation in each range. To select or deselect 2WD, AWD or 4HI mode, vehicle speed must be below 88 Kmh (55 mph) with all wheels at vehicle speed. Shifts will not take place with a wheel speed difference of greater than 21 Kmh (13 mph) between the front and rear wheels. To select or deselect 4LO (if equipped), vehicle speed must be below 5 Kmh (3 mph) with the ignition ON and the transmission in neutral (auto trans) or the clutch pedal pressed (man trans). To select or deselect Transfer Case Neutral, vehicle speed must be 0 Kmh (0 mph) with the ignition ON, engine OFF, the brake pedal applied, and the transmission in neutral (auto trans) or the clutch pedal pressed (man trans). Press the Neutral button (if equipped) on the Transfer Case Selector Switch until the Neutral Indicator is illuminated. WARNING: Apply the parking brake. The vehicle may roll with the Transfer Case in neutral. To verify that the Transfer Case is in Neutral, shift the automatic transmission into reverse and release the brake pedal for three seconds or shift the manual transmission into gear and slowly release the clutch pedal. There should be no vehicle movement if the Transfer Case is in Neutral.
5. With the scan tool, read DTCs in the Front Control Module (FCM) and in the Instrument Cluster. Are there any DTCs present in the Front Control Module (FCM) or in the Instrument Cluster? Yes Return to the symptom list and perform the appropriate diagnostic test. No Repair is complete.