Brake Warning Indicator Inoperative Without DRLs
Circuit Description
The brake warning indicator illuminates when ground is applied to the brake warning indicator control circuit.
Test Description
The number below refers to the step number on the diagnostic table:
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Brake Warning System Schematics | |||
1 | Did you review the Brake Warning System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 | Verify a fault is present. Does the brake warning indicator function normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the brake warning indicator illuminate for 3 seconds and then turn OFF? | Go to Step 5 | Go to Step 4 |
4 |
Does the scan tool display DTC C0288? | Go to Diagnostic Trouble Code (DTC) List in Antilock Brakes | Go to Step 10 |
5 | Apply the park brake. Does the brake warning indicator illuminate? | Go to Step 16 | Go to Step 6 |
6 |
Does the brake warning indicator illuminate? | Go to Step 8 | Go to Step 7 |
7 | Repair the open in the brake warning indicator control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 23 | -- |
8 | Inspect for poor connections at the harness connector of the park brake warning 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 23 | Go to Step 9 |
9 | Replace the park brake warning switch. Refer to Parking Brake Indicator Switch Replacement in Park Brake. Did you complete the replacement? | Go to Step 23 | -- |
10 |
Does the brake warning indicator illuminate? | Go to Step 21 | Go to Step 11 |
Does the test lamp illuminate for 3 seconds and then turn OFF? | Go to Step 13 | Go to Step 12 | |
12 | Repair the open in the brake warning indicator control circuit or the ABS pressure differential sensor signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 23 | -- |
13 | Inspect the brake warning indicator lamp for an open (burned out) filament. Did you find and correct the condition? | Go to Step 23 | Go to Step 14 |
14 | Inspect for poor connections at the harness connector of the IPC. 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 23 | Go to Step 15 |
15 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 23 | -- |
16 |
Does the brake warning indicator illuminate? | Go to Step 18 | Go to Step 17 |
17 | Repair the open in the ABS pressure differential sensor signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 23 | -- |
18 | Test the ground circuit of the brake pressure differential switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 19 |
19 | Inspect for poor connections at the harness connector of the brake pressure differential 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 23 | Go to Step 20 |
20 | Replace the brake pressure differential switch. Refer to Combination Valve Replacement . Did you complete the replacement? | Go to Step 23 | -- |
21 | Inspect for poor connections at the harness connector of the EBCM. 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 23 | Go to Step 22 |
22 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement in Antilock Brake System. Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Did you complete the replacement? | Go to Step 23 | -- |
23 | Verify the system is repaired. Does the brake warning indicator function normally? | System OK | Go to Step 3 |
Brake Warning Indicator Inoperative DRL Equipped
Circuit Description
The brake warning indicator illuminates when ground is applied to the brake warning indicator control circuit.
Test Description
The numbers below refer to the step numbers on the diagnostic table:
-
This step tests for an open in the ABS pressure differential sensor signal circuit or the brake warning indicator control circuit by substituting the brake warning indicator lamp and the IPC with a test lamp.
-
This step tests the ABS pressure differential sensor signal circuit for an open.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Brake Warning System Schematics | |||
1 | Did you review the Brake Warning System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 | Verify a fault is present. Does the brake warning indicator function normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the brake warning indicator illuminate for 3 seconds and then turn OFF? | Go to Step 5 | Go to Step 4 |
4 |
Does the scan tool display DTC C0288? | Go to Diagnostic Trouble Code (DTC) List in Antilock Brakes | Go to Step 10 |
5 | Set the park brake. Does the brake warning indicator illuminate? | Go to Step 13 | Go to Step 6 |
6 |
Does the brake warning indicator illuminate? | Go to Step 8 | Go to Step 7 |
7 | Test for an open in the park brake switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 24 |
8 | Inspect for poor connections at the harness connector of the park brake warning 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 25 | Go to Step 9 |
9 | Replace the park brake warning switch. Refer Parking Brake Indicator Switch Replacement in Park Brake. Did you complete the replacement? | Go to Step 25 | -- |
10 |
Does the brake warning indicator illuminate? | Go to Step 21 | Go to Step 11 |
Does the test lamp illuminate for 3 seconds and then turn OFF? | Go to Step 14 | Go to Step 12 | |
12 | Test the brake warning indicator control circuit and the ABS pressure differential sensor signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 23 |
Does the brake warning indicator illuminate? | Go to Step 18 | Go to Step 17 | |
14 | Inspect the brake warning indicator lamp for an open (burned out) filament. Refer to Instrument Cluster Bulb Replacement in Instrument Panel, Gauges, and Console. Did you find and correct the condition? | Go to Step 25 | Go to Step 15 |
15 | Inspect for poor connections at the harness connector of the IPC. 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 25 | Go to Step 16 |
16 | Replace the instrument panel cluster. Refer to In Instrument Cluster Replacement in Instrument Panel, Gauges, and Console. Did you complete the replacement? | Go to Step 25 | -- |
17 | Repair the open in the ABS pressure differential sensor signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 25 | -- |
18 | Test the ground circuit of the brake pressure differential switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 19 |
19 | Inspect for poor connections at the harness connector of the brake pressure differential 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 25 | Go to Step 20 |
20 | Replace the brake pressure differential switch. Refer to Combination Valve Replacement . Did you complete the replacement? | Go to Step 25 | -- |
21 | Inspect for poor connections at the harness connector of the EBCM. 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 25 | Go to Step 22 |
22 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement in Antilock Brake System. Important: Use the scan tool in order to perform the Tire Size Calibration procedure. Did you complete the replacement? | Go to Step 25 | -- |
23 | Inspect for poor connections at the harness connector of the DRL control module circuit board. 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 25 | Go to Step 24 |
24 | Replace the DRL control module circuit board. Refer to Daytime Running Lights (DRL) Control Module Replacement in Lighting Systems. Did you complete the replacement? | Go to Step 25 | -- |
25 | Verify the system is repaired. Does the brake warning indicator function normally? | System OK | Go to Step 3 |
