Circuit Description
The body control module (BCM) controls the courtesy lamps through the courtesy lamp supply voltage circuit. The BCM grounds the courtesy lamp low control circuit which completes the courtesy lamps ground circuit, and the courtesy lamps illuminate.
Conditions for Running the DTC
The BCM must be commanding the interior lamp control circuit OFF.
Conditions for Setting the DTC
| • | The BCM detects that the output for the interior lamp control circuit is low when it is expected to be high. |
| • | The condition above must be present for more than 0.3 seconds. |
Action Taken When the DTC Sets
The BCM stores DTC B2617 in memory.
Conditions for Clearing the DTC
| • | A current DTC B2617 will clear if the short to ground or open in the interior lamp control circuit is no longer detected by the BCM. |
| • | A history DTC B2617 will clear after 100 consecutive ignition cycles if the condition for the condition is no longer present nor any other condition in the BCM is detected. |
| • | The BCM receives the Clear Code command from the scan tool. |
Diagnostic Aids
| • | If the DTC B2617 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
| • | The following conditions may cause an intermittent condition to occur: |
| - | An intermittent short to ground or open in the interior lamp control circuit. |
| - | Any courtesy lamp is intermittently shorted to ground. |
| - | The BCM is intermittently shorted to ground or open. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Interior Lights Schematics | |||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | |
Do the courtesy lamps turn ON and OFF with each command? | Go to Diagnostic Aids | Go to Step 3 | |
3 | Are the courtesy lamps ON at all times? | Go to Step 6 | Go to Step 4 |
4 | Is only one courtesy lamp inoperative? | Go to Step 7 | Go to Step 5 |
5 | Test the BCM courtesy lamps low control circuit for an open or 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 9 |
6 | Test the courtesy lamps low control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 |
7 | Inspect for a for an open or high resistance in the inoperative courtesy lamp low control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 8 |
8 | Replace the inoperative courtesy lamp. Did you complete the repair? | Go to Step 11 | -- |
9 | Inspect for poor connections at the harness connector of the body control module. 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 |
10 |
Important: Perform the set up procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 10 | -- |
11 |
Does the DTC set again? | Go to Step 2 | System OK |
