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Pinpoint Test B : DTC U300D:11: Notes

REFER to: Four-Wheel Drive Systems - System Operation and Component Description . Refer to Wiring Diagram Four Wheel Drive Systems for schematic and connector information.

Normal Operation 

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 IPC over the HS-CAN. The ignition switch position status message originates from the BCM which communicates the ignition switch position status over the MS-CAN (medium speed-controller area network). The IPC acts as a gateway module, transferring the ignition switch status message from MS-CAN to HS-CAN. For information regarding network messaging, REFER to: Communications Network .

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
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: 

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