Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.VISUAL INSPECTION CHART
Electrical - Battery Junction Box (BJB) fuse(s):
- 12 (20A) (no communication with the ABS module)
- 13 (15A) (no communication with the C-CM)
- 22 (30A) (no communication with the DCSM)
- 23 (7.5A) (no communication with the PCM)
- 32 (30A) (no communication with the DSM)
- 36 (20A) (no communication with the C-CM)
- 37 (10A) (no communication with the PCM)
- 47 (20A) (no communication with the PCM)
- Smart Junction Box (SJB) fuse(s):
- 5 (10A) (no communication with the SJB)
- 11 (10A) (no communication with the 4X4 control module)
- 12 (7.5A) (no communication with the RFA module)
- 13 (5A) (no communication with the DDM)
- 14 (10A) (no communication with the APIM, FDIM, GPSM, DSM)
- 15 (10A) (no communication with the HVAC module)
- 16 (15A) (no communication with the FCIM, ILCM)
- 19 (25A) (no communication with the audio DSP module)
- 20 (15A) (no power to scan tool)
- 26 (10A) (no communication with the HUD module, IPC)
- 27 (20A) (no communication with the RFA module)
- 29 (5A) (no communication with the HUD module, IPC)
- 32 (10A) (no communication with the RCM)
- 34 (5A) (no communication with the ABS module, PSCM)
- 35 (10A) (no communication with the 4X4 control module, PAM, SOD-L, SOD-R)
- 39 (20A) (no communication with the ACM)
- 43 (10A) (no communication with the HCM-2)
- 46 (7.5A) (no communication with the OCSM)
- Data Link Connector (DLC)
- Wiring harness
- Wiring, terminals or connectors
- Battery Junction Box (BJB) fuse(s):
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the DLC.
If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- GO to PINPOINT TEST AE , to diagnose no power to the scan tool.
- Establish a scan tool session.
- If an IDS session cannot be established with the vehicle, (IDS may state "No communication can be established with the PCM"):
- Choose "NO" when the scan tool prompts whether or not to retry communication.
- Enter either a PCM part number, tear tag or calibration number to identify the vehicle and start a session (the PCM part number and 4-character tear tag are printed on the PCM label).
- GO to PINPOINT TEST A , to diagnose The PCM Does Not Respond To The Scan Tool.
NOTE: The scan tool will first attempt to communicate with the PCM, after establishing communication with the PCM, the scan tool will then attempt to communicate with all other modules on the vehicle. - If an IDS session cannot be established with the vehicle, (IDS may state "No communication can be established with the PCM"):
- Carry out the network test.
- If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 7.
- If the network test fails, GO to SYMPTOM CHART to identify the module not communicating.
- If the DTCs retrieved are related to the concern, go to DTC CHARTS . For all other DTCs, refer to the DIAGNOSTIC TROUBLE CODE (DTC) CHART Diagnostic Trouble Code (DTC) Chart .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
NOTE:
During the network test, the scan tool first attempts to communicate with the PCM, after establishing communication with the PCM, the scan tool then attempts to communicate with all other modules on the vehicle.