For 1990-2009 cars

### Circuit Description

DTC C1282 allows the EBCM/EBTCM to inspect for a calibration malfunction by comparing the calibration value to a known value (checksum). The EEPROM stores the checksum. 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/TCS.

### Conditions for Setting the DTC

DTC C1282 can set any time after the ignition is turned to the RUN position. A malfunction exists if the program identifier is incorrect or the memory checksum is incorrect.

### Action Taken When the DTC Sets

• | A malfunction DTC stores.

• | The ABS/TCS disables.

• | The amber ABS/TCS warning indicators turn on.

### Conditions for Clearing the DTC

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

• | 100 drive cycles pass with no DTC detected.

### Diagnostic Aids

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual or Scan Tool Diagnostics located in this section for the procedure. A bad cell in the EEPROM that is sensitive to temperature changes may cause an intermittent DTC C1282. If DTC C1282 sets more than once but is intermittent replace EBCM/EBTCM. Refer to Electronic Brake and Traction Control Module Replacement .

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

1. Install a scan tool.
2. Turn the ignition switch to the RUN position, engine off.
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/EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | --
4 | The malfunction is intermittent or not present at this time? Is a concern still present? | -- | Go to Diagnostic Aids | Go to Diagnostic System Check