DTC C0286 or C086 ABS Indicator Lamp Circuit Shorted to B+ Domestic
Circuit Description
The ABS indicator is illuminated via a normally closed ground circuit in the EBCM. When the ABS indicator is commanded on, the feedback voltage to the EBCM from the ABS failure control circuit is low.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects high feedback voltage from the ABS failure control circuit when the ABS lamp is commanded on.
Action Taken When the DTC Sets
The BRAKE indicator is substituted for the ABS indicator and is commanded on if an ABS disabling DTC sets in EBCM memory.
Conditions for Clearing the DTC
| • | The condition(s) responsible for setting the DTC is no longer present. |
| • | A scan tool is used in order to clear the DTC. |
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Intermittent Conditions and Poor Connections , Connector Repairs and Wiring Repairs in Wiring Systems.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | |||
1 | Did you perform the ABS diagnostic system check? | Go to Step 2 | Go to Diagnostic System Check |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the DTC set? | Go to Step 4 | Go to Step 5 |
4 | Test the ABS failure control 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 9 | Go to Step 7 |
5 | Inspect for poor connections at the harness connector of the instrument panel cluster. 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 9 | Go to Step 6 |
6 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console. Did you complete the replacement? | Go to Step 9 | -- |
7 | 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 9 | Go to Step 8 |
8 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Important: Perform the Tire Size Calibration procedure. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 3 | System OK |
DTC C0286 or C086 ABS Indicator Lamp Circuit Shorted to B+ Export
Circuit Description
The ABS indicator is illuminated via a normally open ground circuit in the EBCM. When the ABS indicator is commanded on, the feedback voltage to the EBCM from the ABS failure control circuit is low.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects high feedback voltage from the ABS failure control circuit when the ABS lamp is commanded on.
Conditions for Clearing the DTC
| • | The condition(s) responsible for setting the DTC is no longer present. |
| • | A scan tool is used in order to clear the DTC. |
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Intermittent Conditions and Poor Connections , Connector Repairs and Wiring Repairs in Wiring Systems.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics | |||
1 | Did you perform the ABS Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the DTC set? | Go to Step 4 | Go to Step 6 |
4 |
Does the DTC set? | Go to Step 5 | Go to Step 7 |
5 | Test the ABS failure control 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 12 | Go to Step 8 |
6 | Inspect for poor connections at the harness connector of the electronic brake control lamp relay. 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 12 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the instrument panel cluster. 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 12 | Go to Step 10 |
8 | 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 12 | Go to Step 11 |
9 | Replace the electronic brake control lamp relay. Did you complete the replacement? | Go to Step 12 | -- |
10 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges, and Console. Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Important: Perform the Tire Size Calibration procedure. Did you complete the replacement? | Go to Step 12 | -- |
12 |
Does the DTC reset? | Go to Step 3 | System OK |
