DTC C1203: ECM Communication Circuit Malfunction [12/2017 - 09/2018]: Description
The circuit is used to send TRAC and VSC control information from the skid control ECU (brake actuator assembly) to the ECM, and engine control information from the ECM to the skid control ECU (brake actuator assembly) through the CAN communication system.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| C1203 | ECM Communication Circuit Malfunction | Either of the following is detected:
|
|
- |
- *: w/ Variable Gear Ratio Steering System
C1203 DTC DETECTION CONDITIONS
| Vehicle Condition | |||||||
|---|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | Pattern 6 | ||
| Diagnosis Condition | - | - | - | - | - | - | - |
| Malfunction Status | Engine, drive source and destination information sent from the ECM does not match the information of the skid control ECU or there is no information in memory. | ◦ | - | - | - | - | - |
| The vehicle information (DRS availability, VGRS type information and active stabilizer suspension system coordinated control availability information) sent from the VGRS ECU (front steering control ECU) does not match the information stored in the skid control ECU.* | - | ◦ | - | - | - | - | |
| The VGRS setting availability information for the steering sensor does not match the information stored in the skid control ECU. | - | - | ◦ | - | - | - | |
| No system information stored in the skid control ECU. | - | - | - | ◦ | - | - | |
| Incorrect installation of the skid control ECU or ECM | - | - | - | - | ◦ | - | |
| When the skid control ECU is malfunctioning. | - | - | - | - | - | ◦ | |
| Detection Time | - | - | - | - | - | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |
- *: w/ Variable Gear Ratio Steering System
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.