Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-P073000

Condition
The anti-lock brake system module monitors the speed on the driven wheels and compares it with the actual vehicle speed. If the Brake control module (BCM) detects that the vehicle speed is greater than the speed at the driven wheels, the vehicle is considered to be slipping on the surface. To prevent slippage, the Brake control module (BCM) requests more torque to the driven wheels. The request is sent to the Engine control module (ECM) via the CAN network.
In vehicles with automatic transaxle, the Engine control module (ECM) receives information via the CAN network about the current torque amplification from the Transmission control module (TCM). The current wheel torque can be calculated using this information.
The Engine control module (ECM) checks the actual circumstances and evaluates the received signals before any torque increases are carried out.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The signal about current torque amplification, received from the Transmission Control Module (TCM), deviates too much from the own calculated torque amplification factor.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Engine running for at least 3 seconds.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute value
- None.

Possible source
- Trace the cause of the fault in the Transmission Control Module (TCM).

Fault symptom[s]
- Text window and warning symbol/Text message