Circuit Description
DTC C1282 allows the 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/ETS.
Conditions for Setting the DTC
DTC C1282 can set any time after the ignition is turned to the ON 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/ETS disables. |
| • | The amber ABS/ETS warning indicators 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 DTCs 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 EBTCM.
If the malfunction is not current, use wiggle test on the wiring harness to pinpoint an intermittent malfunction in the motor circuitry or connections. Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:
| • | Backed out terminals |
| • | Improper mating |
| • | Improperly formed or damaged terminals |
| • | Poor terminal-to-wiring connections |
| • | Physical damage to the wiring harness |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 |
Do not start the engine. Is DTC C1282 set as a current DTC? | -- | ||
3 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the repair complete? | -- | -- | |
4 | Is the malfunction intermittent or is not present at this time? | -- | Go to Diagnostic Aids | -- |
