Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
DTC Descriptor
DTC B2961 : Key In Ignition CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Key In Ignition 5V Reference | 1 | 1 | 1 | -- |
Key In Ignition Signal | 1 | B2961 | B2961 | -- |
1. Chime Malfunction. | ||||
Circuit/System Description
The body control module (BCM) monitors the ignition switch. When the key is in the ignition, the ignition switch is closed and the signal circuit is low. When the key is not in the ignition, the ignition switch is open and the signal circuit is high.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
| • | The ignition 1 voltage circuit is active and the key in ignition switch signal circuit is active and the signal circuit is high. |
| • | The above condition is present for greater than 5 seconds. |
Action Taken When the DTC Sets
The BCM stores DTC B2961 in memory.
Conditions for Clearing the DTC
| • | The DTC becomes history when the conditions for setting the DTC are no longer present. |
| • | The history DTC clears after 100 malfunction-free warm-up cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Audible Warnings Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify that the Key In Ignition Cylinder Switch parameter is Yes when the key is in the ignition and No when the key is out of the ignition.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the ignition switch.
- Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal 6 and ground.
- Verify the BCM scan tool Key In Ignition Cylinder Switch parameter is No.
- Install a 3A fused jumper wire between the signal circuit terminal 5 and the 5V reference circuit terminal 6. Verify the scan tool Key In Ignition Cylinder Switch parameter displays Yes.
- If all circuits test normal, test or replace the ignition switch.
| ⇒ | If less than the specified range, test the 5V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
| ⇒ | If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
