Test Description
The number below refers to the step number on the diagnostic table.
- 2: This step determines if the fault is present.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Connect a scan tool. Turn ON the ignition, with the engine OFF. Monitor the stop lamp signal parameter in the cruise control data list. Do not depress the brake pedal. Does the stop lamp signal parameter indicate ON? | Go to Step 3 | Go to Diagnostic Aids |
| 3 | Test for a short to ground or an open in the stop lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the body control module (BCM). Refer to Control Module References for replacement, setup and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Use a scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC P0572
The number below refers to the step number on the diagnostic table.
- 2: This step determines if the fault is present.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Connect a scan tool. Turn ON the ignition, with the engine OFF. Monitor the stop lamp signal parameter in the cruise control data list while depressing the brake pedal. Does the stop lamp signal parameter indicate OFF? | Go to Step 3 | Go to Diagnostic Aids |
| 3 | Test for a short to voltage in the brake pedal position sensor signal circuit. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 5 | Go to Step 4 |
| 4 | Replace the body control module (BCM). Refer to Control Module References for replacement, setup and programming. Did you complete the replacement? | Go to Step 5 | |
| 5 | Use a scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC P0573
| IMPORTANT | The following steps must be completed before using the symptom tables. |
- Perform «Diagnostic System Check - Vehicle»(ref-241670-S16610990062006081100000) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules are operating properly.
- Review the system description and operation in order to familiarize yourself with the system functions. Refer to «Exterior Lighting Systems Description and Operation»(ref-241674-S30597271222006081100000) or «Interior Lighting Systems Description and Operation»(ref-241674-S06473241032006081100000) .
Courtesy Lamps Manual Operation
The courtesy lamps, may be manually operated by the I/P dimmer switch. When the I/P dimmer switch is placed in the ON position, the BCM receives a ground signal from the courtesy lamps ON switch signal circuit. Upon receiving the courtesy lamp switch signal, the BCM then applies battery positive voltage to the courtesy lamp high control circuit, which illuminates the courtesy lamps. The interior lamp switch will override any BCM operation of the interior lamps, such as entry illumination.