Circuit Description
The ignition key alarm 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.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2965 Key In Ignition Circuit Open
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
| • | The ignition 0 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 seconds. |
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. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Audible Warnings Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the Key In Ignition parameter display Yes? | Go to Step 3 | Go to Step 4 |
3 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 8 |
4 | Test the key in ignition switch signal circuit for an open, high resistance, or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 5 |
5 | Test the ground circuit of the ignition key alarm switch for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
6 | Test the ignition 0 voltage circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
9 | Replace the ignition switch. Refer to Ignition and Start Switch Replacement . Did you complete the replacement? | Go to Step 11 | -- |
10 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 11 | -- |
11 |
Does the DTC reset? | Go to Step 2 | System OK |
