Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Important: Verify that the park brake lever is fully released and that there are no leaks or air in the hydraulic brake system. Also, verify that there is proper battery voltage present. | ||||||||||
1 | Did you perform the Hydraulic Brake Diagnostic System Check? | -- | Go to Step 2 | |||||||
2 |
Are all of the modules communicating with the scan tool? | -- | Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Data Line in Wiring Systems | ||||||
3 | Use the scan tool in order to inspect for DTCs in the above listed modules and Instrument Cluster. Are any DTCs present? | -- | Go to the appropriate DTC Diagnostic | Go to Step 4 | ||||||
4 | Use the scan tool to monitor the park brake warning switch input 1 to the BCM. Does the switch change state between set and released during operation of the park brake lever? | -- | Go to Step 8 | Go to Step 5 | ||||||
5 | Disconnect the park brake warning switch. Is the brake warning lamp still ON? | -- | Go to Step 6 | Go to Step 7 | ||||||
6 | Repair the short to ground in CKT 1134 (LT BLU) between the park brake warning switch and the BCM. Is the repair complete? | -- | -- | |||||||
7 | Replace the park brake warning switch. Is the repair complete? | -- | -- | |||||||
8 | Use the scan tool to verify if the brake pressure warning switch state is OK or LOW. Is the brake pressure warning switch state LOW? | -- | Go to Step 9 | Go to Step 12 | ||||||
9 | Disconnect the brake pressure warning switch. Is the brake warning lamp still ON? | -- | Go to Step 10 | Go to Step 11 | ||||||
10 | Repair the short to ground in CKT 680 (PPL) between the brake pressure warning switch and the EBCM. Is the repair complete? | -- | -- | |||||||
11 | Replace the brake pressure warning switch. Is the repair complete? | -- | -- | |||||||
12 | Use the scan tool to turn the brake warning lamp on and off. Does the lamp turn on and off? | -- | Go to Step 13 | |||||||
13 | Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console. Is the repair complete? | -- | -- | |||||||
