B1384

DTC B1384

CIRCUIT DESCRIPTION
The body control module (BCM) monitors the ignition inputs Ignition Off/Run/Crank, Ignition 1 Run/Crank and the accessory signals supplied from the ignition switch. The BCM uses the sequence that the signals appear and their voltage levels to determine the power mode called for by the vehicle operator using the ignition switch. The powertrain control module (PCM) also monitors the Ignition Accessory signal. Battery voltage is supplied to the ignition switch by the IGN TRANSD fuse. If the BCM detects that the Ignition Accessory signal circuit is open or shorted, one of the following DTCs will set:

DTC DESCRIPTORS
- DTC B1382 Device Ignition Accessory (ON and ACC) Circuit Low
- DTC B1383 Device Ignition Accessory (ON and ACC) Circuit High

CONDITIONS FOR RUNNING THE DTC
- The BCM detects a change in the ignition switch circuit states.
- Battery voltage is 9.0-18.5 Volts.

CONDITIONS FOR SETTING THE DTC

DTC B1382
The BCM detects that the Ignition Accessory signal is open or shorted to ground for at least 10 seconds.

DTC B1383
The BCM detects that the Ignition Accessory signal is shorted to voltage for at least 10 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The BCM stores DTC B1382 or B1383 in memory.
- The BCM operates in a fail-safe power mode dependent on the last valid power mode detected and the state of the engine run flag data on the class 2 serial data communications circuits.
- The other modules on the vehicle operate in a fail safe power mode dependent on the last valid power mode transmitted by the BCM and the state of the engine run flag on the class 2 serial data communications circuits.

CONDITIONS FOR CLEARING THE DTC
- A current DTC B1382 or B1383 is moved to history when the ignition is cycled.
- A history DTC B1382 or B1383 clears when the ignition has been cycled 100 times, without a repeat of the malfunction.

TEST

Steps 1 - 4:

Steps 5 - 9:

Steps 10 - 14: