Circuit Description
Battery voltage is supplied to the antilock brake system (ABS) warning lamp with the ignition switch in the ON position. The warning lamp can be activated only by the electronic brake control module (EBCM) internally supplying ground to terminal 20 or by the shorting bar in the EBCM connector when it is disconnected from the module.
Conditions for Running the DTC
The ABS indicator is turned off after 4 seconds when the ignition is turned ON. If the battery voltage is not applied to the EBCM connector at this time, the EBCM may make the fault code.
Conditions for Setting the DTC
The ABS (Amber) indicator is shorted to ground.
Action Taken When the DTC Sets
The warning lamp illuminates continuously.
This is a critical operational fault. The ABS is disabled and the ABS warning lamp is turned ON. The proportioning is operation.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Schematic Reference: Antilock Brake System Connector End Views | ||||
1 |
Is the ABS indicator on? | -- | Go to Step 11 | Go to Step 2 |
2 |
Is the test light on? | -- | Go to Step 5 | Go to Step 3 |
3 |
Is the fuse open? | -- | Go to Step 5 | Go to Step 4 |
4 | Replace the fuse F1. Is the repair complete? | -- | System OK | -- |
5 |
Is the resistance below the specified value? | 20 ohms | Go to Step 7 | Go to Step 6 |
6 | Replace the ABS indicator bulb. Is the repair complete? | -- | System OK | -- |
7 |
Is the resistance below the specified value? | 1 ohms | Go to Step 9 | Go to Step 8 |
8 | Repair the open or high resistance between terminal B5 the I/P cluster harness connector and terminal 8 of the connector C206. Is the repair complete? | -- | System OK | -- |
9 | Use a DVM to measure the resistance between terminal 8 of the connector C206 and terminal 20 of the EBCM harness connector. Is the resistance below the specified value? | 1 ohms | Go to Step 11 | Go to Step 10 |
10 | Repair the open or high resistance between terminal 20 of the EBCM harness connector and terminal 8 of the connector C206. Is the repair complete? | -- | System OK | -- |
11 |
Is the resistance above the specified value? | ∞ | Go to Step 13 | Go to Step 12 |
12 | Repair the shorted to ground resistance between terminal 8 of the connector C206 and terminal B5 of the I/P cluster connector. Is the repair complete? | -- | System OK | -- |
13 |
Is the resistance above the specified value? | ∞ | Go to Step 15 | Go to Step 14 |
14 | Repair the shorted to ground resistance between terminal 8 of the connector C206 and terminal 20 of the EBCM connector. Is the repair complete? | -- | System OK | -- |
15 | Replace the EBCM. Is the repair complete? | -- | System OK | -- |
