B1382

DTC B1382

CIRCUIT DESCRIPTION




Normal vehicle class 2 communication will not commence until the system power mode has been identified. The BCM communicates the system power mode to all the modules connected to the class 2 serial data circuit. The BCM monitors the state of the ignition 1 voltage circuit, accessory voltage circuit and the engine run flag (ERF) in order to determine the present system power mode. The ERF is a serial data message from the engine controller.

CONDITIONS FOR RUNNING THE DTC
Anytime the BCM receives an input or message. The ignition is in the START position.

CONDITIONS FOR SETTING THE DTC
The BCM has detected the accessory voltage circuit is open or shorted to ground for greater than 1 minute when the ignition 1 voltage circuit is high and the engine run flag is true.

ACTION TAKEN WHEN THE DTC SETS
- There is no cluster illumination during bulb check.
- DTC B1382 is set in the BCM.
- BTSI/BCM/MIRROR fuse will open with a short to ground present.

CONDITIONS FOR CLEARING THE MIL/DTC
- A current DTC clears and the MIL is turned OFF when the fault is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault.

DIAGNOSTIC AIDS

Device Power Moding:

Refer to Diagnostic Aids for Circuit Testing and Wiring Repair Procedures.

TEST DESCRIPTION

Steps 1-7:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests the inactive signal circuit for an open or a high resistance.