Electronic Control Modules - Electrical Diagnostics: Diagnosis Dodge Dakota III

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Test

1. 1) CHECK FOR ANY POWERTRAIN CONTROL MODULES 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 DTC's. Does the scan tool display any active PCM DTC's? Yes «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247609-S03197655732007020100000) «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247616-S40205957772007020100000) «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247617-S33672790772007020100000) for the diagnostic test procedure. No Check the above conditions that can cause a low voltage condition. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .

1. 1) CHECK FOR ANY POWERTRAIN CONTROL MODULES 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 DTC's. Does the scan tool display any active PCM DTC's? Yes «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247609-S03197655732007020100000) «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247616-S40205957772007020100000) «(Refer to ENGINE - DIAGNOSIS AND TESTING)»(ref-247617-S33672790772007020100000) for the diagnostic test procedure. No Check the above conditions that can cause a high voltage condition. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .

Scheme 9

1. 1) REPLACE THE FRONT CONTROL MODULE IF DTC IS ACTIVE With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Replace and program the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . 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.

Scheme 10

1. 1) TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase FCM DTC's. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTC's. 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 wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .
3. 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 in-line connector can eliminate a module or group of modules from the list of possible causes for this fault. Refer to the wring diagrams 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace the module that when disconnected the short together was eliminated, in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .

Scheme 11

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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. 1) VERIFY 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 «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 VERIFICATION TEST. No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «*ABS VERIFICATION TEST - VER 1 (EBC125)»(ref-247655-S36064567962007020100000) or «*ABS VERIFICATION TEST - VER 1 (340)»(ref-247655-S37095554702007020100000) . No Replace/update the module that set this DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «SUPPLEMENTAL RESTRAINTS VERIFICATION TEST»(ref-247645-S32370674682007020100000) . No Replace/update the module that set this DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
3. 3) VERIFY THAT THE OCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the OCM is active on the bus. Is the OCM active on the bus? Yes Go To step 4) . No Refer to the No Response test procedure. Refer to the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 OCM? Yes Replace/update the Occupant Classification Module in accordance with the service information. Perform «SUPPLEMENTAL RESTRAINTS VERIFICATION TEST»(ref-247645-S32370674682007020100000) . No Replace/update the module that set this DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set the DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «SKREEM VERIFICATION»(ref-247620-S39178393472007020100000) . No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set the DTC in accordance with the service information Perform the appropriate VERIFICATION TEST.

1. 1) VERIFY 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 the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
2. 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 Diagnose and repair the DTC. Refer to the Index for a complete list of the symptoms. No Go To step 3) .
3. 3) VERIFY THAT THE HFM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the HFM is active on the bus. Is the HFM active on the bus? Yes Go To step 4) . No Refer to the No Response test procedure. Refer to the «DIAGNOSTIC CODE INDEX»(ref-247630-S08481181372007020100000) .
4. 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 HFM? Yes Replace/update the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Replace/update the module that set this DTC in accordance with the service information. Perform the appropriate VERIFICATION TEST.

1. 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 DTC's. Cycle the ignition from on to off 3 times and read the active FCM DTC's. Does the scan tool display this DTC as active? Yes Retest system and attempt to reconfigure the FCM. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Repair is complete. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .

1. 1) VERIFY DTC IS STORED NOTE: Stored faults may indicate a customer perceived intermittent condition. NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. With the scan tool, read stored DTCs. Is this DTC stored? Yes Go To step 2) . No Diagnose the active DTC. Refer to the Index for a list of the symptoms.
2. 2) CHECK THE ENVIRONMENTAL DATA With the scan tool, read the loss of communication environmental data. Does the loss of communication environmental odometer data match up to any of the previous service procedures listed in the possible causes or are their any stored CAN B or C hardware electrical, battery, ignition voltage, VIN missing/mismatch, FCM configuration DTCs present with matching environmental data? Yes These DTCs may have been the result of other service procedures performed. Clear DTCs. No Go To step 3) .
3. 3) VERIFY INTERMITTENT LOST COMMUNICATION DTC - WIRING CONCERNS Turn the ignition on. With the scan tool, select Network Diagnostics. Is there more than one ECU with stored DTCs "Logged Against" the module and one or more lost communication DTCs stored in the offending module? Yes Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals. Repair as necessary. No Go To step 4) .
4. 4) VERIFY INTERMITTENT LOST COMMUNICATION DTC - OFFENDING MODULE Turn the ignition on. With the scan tool, select Network Diagnostics. Is there more than one ECU with stored DTCs "Logged Against" the module and NO lost communication DTCs stored in the offending module? Yes Check for TSB related to this offending module. No Go To step 5) .
5. 5) VERIFY INTERMITTENT LOST COMMUNICATION DTC - REPORTING MODULE Turn the ignition on. With the scan tool, select Network Diagnostics. Is there ONLY ONE ECU with stored DTCs "Logged Against" the module? Yes Check for TSB related to the module that set this DTC. No Verify if the vehicle was recently in for this type of service. Otherwise, visually inspect the related wiring harness for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals. Repair as necessary.

Scheme 12

1. 1) CHECK THE STATUS OF THE ERROR MESSAGE NOTE: Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be displayed. NOTE: Ensure the scan tool is updated to the latest software. With the scan tool, record the error message. Disconnect the scan tool from the DLC. Cycle the ignition from on to off 3 times. Turn the ignition on. Does the scan tool display this same error message? Yes Go To step 2) . No The conditions that caused this error message to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. 2) (D52) CAN C DIAGNOSTIC (+) CIRCUIT OPEN Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Disconnect the scan tool from the DLC. NOTE: Check the connectors at both the DLC and the FCM. Measure the resistance of the (D52) CAN C Diagnostic (+) circuit between the FCM connector and the DLC. Is the resistance below 5.0 ohms? Yes Go To step 3) . No Repair the (D52) CAN C Diagnostic (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .
3. 3) (D51) CAN C DIAGNOSTIC (-) CIRCUIT OPEN Measure the resistance of the (D51) CAN C Diagnostic (-) circuit between the FCM connector and the DLC. Is the resistance below 5.0 ohms? Yes Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Front Control Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) . No Repair the (D51) CAN C Diagnostic (-) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-247618-S35373433422007020100000) .

Scheme 13