Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
VISUAL INSPECTION CHARTElectrical - Battery Junction Box (BJB) fuse(s):
- 5 (40A) (ABS module)
- 7 (30A) (Liftgate/Trunk Module (LTM))
- 23 (30A) (Driver Seat Module (DSM))
- 28 (30A) (HVAC module Electronic Manual Temperature Control (EMTC) or Dual Automatic Temperature Control (DATC))
- 43 (30A) (ABS module)
- 56 (15A) (Transmission Control Module (TCM))
- 79 (5A) (Cruise-Control Module (C-CM))
- 86 (7.5A) (PCM)
- 89 (5A) (Headlamp Control Module (HCM))
- 90 (10A) (PCM, TCM)
- 91 (10A) (C-CM)
- 92 (10A) (ABS module)
- Body Control Module (BCM) fuse(s):
- 6 (5A) (TPM module)
- 7 (7.5A) (DSM)
- 9 (10A) (LTM)
- 11 (10A) (Instrument Panel Cluster (IPC), Head Up Display (HUD) module)
- 18 (10A) (BCM)
- 19 (20A) (Audio Digital Signal Processing (DSP) module)
- 23 (15A) (FLM, Remote Function Actuator (RFA) module, SCCM)
- 24 (15A) (no power to DLC, Steering Column Control Module (SCCM))
- 26 (5A) (Global Positioning System Module (GPSM))
- 27 (20A) (RFA module)
- 29 (20A) (Accessory Protocol Interface Module (APIM), Audio Front Control Module (ACM), Front Controls Interface Module (FCIM), Front Control/Display Interface Module (FCDIM))
- 34 (10A) (Parking Aid Module (PAM), Side Obstacle Detection Control Module - Left (SOD-L), Side Obstacle Detection Control Module - Right (SOD-R))
- 35 (5A) (Head Up Display (HUD) module)
- 36 (10A) (Heated Steering Wheel Module (HSWM))
- 41 (7.5A) (Occupant Classification System Module (OCSM), Restraints Control Module (RCM))
- 46 (10A) (HVAC module EMTC or DATC)
- Data Link Connector (DLC)
- Wiring, terminals or connectors
- Connect the scan tool to the DLC.
- If the Integrated Diagnostic System (IDS) does not communicate with the VCM:
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.- 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"):
NOTE: 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.- 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. If the PCM part number cannot be found, a base part number search on the HVBOM application (under the OASIS tab on the technician service publication website) retrieves the PCM part number.
- GO to Pinpoint Test A , to diagnose The PCM Does Not Respond To The Scan Tool.
- Carry out the network test.
- If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6.
- If the network test fails, GO to Symptom Chart to diagnose the failed communication network.
- If a module fails to communicate during the network test, GO to Symptom Chart .
- Retrieve and review the DTCs.
- If the DTCs retrieved are related to the concern, go to DTC Charts . Follow the non-network DTC diagnostics (B-codes, C-codes, P-codes) prior to the network DTC diagnostics (U-codes).
- If no DTCs related to the concern are retrieved, GO to Symptom Chart .