Pinpoint Test G: U300D:11
WARNING: This page is about a different variant/trim than selected.
- Refer to FOUR WHEEL DRIVE SYSTEMS
for schematic and connector information.
Normal Operation and Fault Conditions
The TCCM receives ignition switch position status from the hardwired run/start input to TCCM and the ignition switch position status message communicated by the GWM over the FD-CAN. The ignition switch position status message originates from the BCM which communicates the ignition switch position status over the HS-CAN1. For information regarding network messaging, REFER to: Controller Area Network (CAN) Module Communications Network - System Operation and Component Description
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition TCCM U300D:11 Ignition Input On/Start: Circuit Short To Ground This DTC sets when the ignition switch position status message broadcast by the BCM over the HS-CAN does not match the hardwired run/start input circuit voltage signal at the TCCM. Possible Sources
- VPWR Short to Ground
- VPWR Open circuit
- VPWR Short to voltage
- BCM
- G1 CHECK THE TCCM (TRANSFER CASE CONTROL MODULE) IGNITION CIRCUIT FUSE
- Inspect BCMC Fuse 13 (10A).
Is the fuse OK?
Yes GO to G2 No REPAIR short to ground. INSTALL new fuse. - G2 CHECK THE TCCM (TRANSFER CASE CONTROL MODULE) IGNITION CIRCUIT FOR VOLTAGE
- Ignition OFF.
- Disconnect TCCM C2371A .
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C2371A-7 Ground
Is the voltage greater than 10v?
Yes GO to G3 No REPAIR open circuit between BCMC and TCCM - G3 CHECK THE TCCM (TRANSFER CASE CONTROL MODULE) IGNITION CIRCUIT FOR SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect TCCM C2371A .
- Measure:
Positive Lead Measurement / Action Negative Lead C2371A-7 Ground
Is any voltage present?
Yes REPAIR the short to voltage. No The TCCM is receiving the correct Ignition status. VERIFY BCM is broadcasting correct ignition status. INSTALL a new BCM. Refer to the appropriate REMOVAL AND INSTALLATION procedure. - G4 CHECK THE TCCM (TRANSFER CASE CONTROL MODULE) IGNITION CIRCUIT FOR SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect TCCM C2371A .
- Measure:
Positive Lead Measurement / Action Negative Lead C2371A-7 Ground
Is any voltage present?
Yes REPAIR the short to voltage. No The TCCM is receiving the correct Ignition status. VERIFY BCM is broadcasting correct ignition status. INSTALL a new BCM. Refer to the appropriate REMOVAL AND INSTALLATION procedure.