• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
The EBCM monitors the number of Key On and Key Off cycles. When it detects that a Key Off cycle was incomplete or non-existent this fault will set. This means the fault reports a problem that occurred at the end of the previous ignition cycle. If this occurs during an EBCM service operation, any calibrations or offsets learned during that service operation may not be properly stored in memory.
• | Ignition ON. |
• | The ignition voltage is greater than 10 volts. |
• | The EBCM is initializing. |
A Key Off cycle was interrupted before completion, or power was removed from the module with the key in the ON or Accessory position.
• | The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
• | A DIC message and/or a warning indicator may be displayed. |
• | The condition for the DTC is no longer present. |
• | The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles. |
This DTC can set if battery voltage drops below 8 volts with ignition ON.
Antilock Brake System Schematics
• | Circuit Testing |
• | Wiring Repairs |
Control Module References for scan tool information
Cycle ignition, verify DTC C0552 or C121D is not set.
⇒ | If DTCs are set, replace the EBCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming