Circuit Description
DTC C1282 allows the EBCM 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
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 disables. |
| • | The amber ABS warning indicator turn 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. |
Diagnostic Aids
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.
Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual for the procedure.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 |
Do not start the engine. Is DTC C1282 set as a current DTC? | -- | ||
3 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | -- |
4 | The malfunction is intermittent or is not present at this time. Is the action complete? | -- | Go to Diagnostic Aids | -- |
