DTC C1203/53 ECM Communication Circuit Malfunction: Description
The circuit is used to send TRAC control information (engine revolution signal) from the skid control ECU to the ECM (TRC+, TRC-), and engine control information from the ECM to the skid control ECU (ENG+, ENG-).
DTC REFERENCE TABLE
| DTC No. |
DTC Detection Condition |
Trouble Area |
| C1203/53 |
When any of the following (1 to 3) is detected:
- All the following conditions continue for at least 5 seconds.
- IG1 terminal voltage is 9.5 V or more.
- Cannot send data to ECM.
- All the following conditions continue for at least 5 seconds.
- IG1 terminal voltage is more than 9.5 V.
- Engine speed is 500 rpm or more.
- Cannot receive data from ECM.
- All the following conditions repeat 10 times in a series.
- Cannot send data to ECM.
- Cannot receive data from ECM.
- Both of the above occur at least once within 5 seconds.
|
- TRC+ or TRC- circuit
- ENG+ or ENG- circuit
- ECM
|