For 1990-2009 cars

### Circuit Description

DTC C1282 allows the EBCM to inspect for a calibration malfunction by comparing the calibration value to a known value.

DTC C1282 also acts as a security measure to prevent improper use of calibrations or changes to these calibrations. Improper calibrations may alter the designed function of ABS.

### Conditions for Setting the DTC

DTC C1282 can be set anytime. A malfunction exists if the EBCM internal memory calibration is incorrect.

### Action Taken When the DTC Sets

• | A malfunction DTC stores.

• | The ABS disables.

• | The ABS warning indicator turns ON.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.

• | 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition OFF.

### Diagnostic Aids

An intermittent DTC C1282 is most likely caused by a malfunctioning EBCM that is sensitive to temperature changes. If DTC C1282 occurred more than once, but is intermittent, replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 |

1. Turn the ignition switch to the ON position.

Do not start the engine.

2. Install a Scan Tool .
3. Use the Scan Tool in order to inspect for DTCs.

Is DTC C1282 set as a current DTC?

--

Go to Step 3

Go to Step 4

3 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check - ABS | --
4 | The malfunction is intermittent or is not present at this time. Refer to Diagnostic Aids for more information. Is the action complete? | -- | System OK | --