B3924

DTC B3924

CIRCUIT DESCRIPTION
After as the ignition switch is turned to the ON position, the body control module (BCM) sends an encrypted security code to the powertrain interface module (PIM). The PIM compares the received security code with its own security code, and if it is valid, the PIM via the Engine Control Module (ECM) enables the vehicle to be started. If the security code received by the PIM is incorrect, DTC B3924 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3924 Wrong Environment Identifier Received From BCM

CONDITIONS FOR RUNNING THE DTC
Conditions for running the DTC are:
- The ignition is switched ON.
- The ignition voltage is 10-16 V.
- The PIM does not receive a valid response from the BCM.

CONDITIONS FOR SETTING THE DTC
The PIM detects the traction control switch is activated for 60 seconds or more.

ACTION TAKEN WHEN THE DTC SETS
- The vehicle will not start during the current ignition cycle.
- A Immobilizer Failed message is displayed on the instrument cluster multifunction display.

CONDITIONS FOR CLEARING THE DTC
Refer to Diagnostic General Descriptions for information on the conditions for clearing DTCs.

DIAGNOSTIC AIDS
Refer to Cruise Control Description and Operation for cruise control switch description, operation and inspection procedures. Refer to Cruise Control Schematics, Cruise Control Component Views, and Cruise Control Connector End Views. Refer to Testing for Intermittent Conditions and Poor Connections for intermittent fault conditions.

TEST DESCRIPTION

Step 1 - Step 8:

3. This step verifies if the PIM and ECM have been linked together.
4. This step ensures there are no problems within the BCM system that may cause DTC B3924 to set.
6. This step tests the PIM ground circuits and supply voltage.
7. This step tests the PIM harness connector for serviceability.