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 at ABS initialization. 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 DTC(s) 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 EBCM.

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 Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check
2 |

1. Turn the ignition switch to the RUN 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. Is the repair complete? | -- | Go to Diagnostic System Check | --
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 | --