Circuit Description
1MZ, 3MZ
The circuit is used to send TRAC & VSC control information from the skid control ECU to the ECM (TRC+, TRC-), and engine control information from the ECM to the skid control ECU (ENG+, ENG-).
2AZ
The ECM signal circuit is used for the CAN communication system.
ECM COMMUNICATION CIRCUIT MALFUNCTION
| DTC No. |
DTC Detecting Condition |
Trouble Area |
| C1203/53 |
When any of the following (1 to 4) is detected: 1MZ, 3MZ When the following (4) is detected: 2AZ
- 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 sec.
- Destination information from ECM does not much stored value.
|
- TRC+ or TRC- circuit (1MZ, 3MZ)
- ENG+ or ENG- circuit (1MZ, 3MZ)
- ECM
- CAN communication system (2AZ)
|