B2965

DTC B2965

Diagnostic Instructions
^ Perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure. Diagnostic System Check - Vehicle Diagnostic Information
^ Review [Strategy Based Diagnosis] for an overview of the diagnostic approach. Strategy Based Diagnosis
^ [Diagnostic Procedure Instructions - Vehicle Diagnostic Information]. Diagnostic Procedure Instructions - Vehicle Diagnostic Information

DTC Descriptor
DTC B2965 Key In Ignition Circuit Open

Diagnostic Fault Information






Circuit Description
The ignition switch closes, signal circuit is low, when the key is in the ignition and opens, signal circuit is high, when the key is not in the ignition. The body control module (BCM) monitors the key in ignition signal circuit in order to activate an audible warning.

Conditions for Running the DTC
The ignition is ON.

Conditions for Setting the DTC
^ The ignition 1 voltage circuit is active, high signal, and the key in ignition signal circuit is high.
^ The conditions above must be present for more than 0.3 second.

Action Taken When the DTC Sets
The BCM stores DTC B2965 in memory

Conditions for Clearing the DTC
^ The DTC Becomes history when the fault is no longer present.
^ A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ The BCM receives a clear code command from the scan tool.

Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the ignition switch.
2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit and ground.
^ If greater than 1 ohm test the ground circuit for an open/high resistance.

3. Ignition ON, install a 3-amp fused jumper between the signal circuit and ground. Verify the scan tool Key In Ignition parameter displays Yes.
^ If not Yes, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.

4. Ignition ON, engine OFF, verify the Ignition 1 Input parameter displays Off.
^ If not Off, test the ignition 1 voltage circuit for a short to voltage.

5. If all circuits test normal, test or replace the ignition switch.

Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure. Diagnostic Repair Verification - Vehicle Diagnostic Information
^ [Ignition and Start Switch Replacement]
^ [Control Module References] for BCM replacement, setup, and programming Programming and Relearning