B1384

DTC B1382, B1383, or B1384

Circuit Description

The body control module (BCM) monitors the ignition inputs Ignition Off/Run/Crank, Ignition 1 Run/Crank and the Ignition Accessory signals supplied from the ignition switch. The BCM uses the sequence that the signals appear, their voltage levels and the engine run flag (ERF) status to determine the power mode. Battery voltage is supplied to the ignition switch by a fuse in the underhood fuse block. The Ignition Accessory signal also wakes up the powertrain control module (PCM). The following table shows the correct ignition switch signals:





DTC Descriptors

This diagnostic procedure supports the following DTCs:

* 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

Battery voltage is 9-16 volts.

Conditions for Setting the DTC

DTC B1382

The BCM detects that the accessory voltage circuit is open or short to ground for at least 1 second.

DTC B1383

The BCM detects that the accessory voltage circuit 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 determines a fail-safe power mode dependent on the last valid power mode detected and the state of the ERF.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.
* A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

TEST

Step 1 - Step 11:

Step 12 - Step 15: