DTC C123D-14: IG2 Circuit Short to Ground or Open [11/2020 - ]: Description
If a malfunction is detected in the power supply circuit, the No. 2 skid control ECU (brake actuator assembly) power source voltage drops, or there is insufficient voltage to operate the main relay, the No. 2 skid control ECU (brake actuator assembly) will store a DTC.
If the auxiliary battery voltage is temporarily low, this DTC may be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|
| C123D-14 | IG2 Circuit Short to Ground or Open | When communication with the EV control ECU is normal or the vehicle speed exceeds 10 km/h, no voltage (below 3.0 V and either PT1 is on or PT2 is on) is applied to the IG2 terminal and the power source voltage (exceeding 9.5 V) is applied to the IG1 terminal continuously for 4 seconds or more. |
|
Brake/EPB | A | Output ECU: No. 2 skid control ECU (brake actuator assembly) |
C123D-14 DTC DETECTION CONDITIONS
| Vehicle Condition | |||||
|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | ||
| Diagnosis Condition | When communication with the EV control ECU is normal | ◦ | ◦ | - | - |
| The vehicle speed is exceeds 10 km/h (6 mph) | - | - | ◦ | ◦ | |
| Malfunction Status | No voltage (below 3.0 V and either PT1 is on) is applied to the IG2 terminal and the power source voltage (exceeding 9.5 V) is applied to the IG1 terminal continuously | ◦ | - | ◦ | ◦ |
| No voltage (below 3.0 V and either PT2 is on) is applied to the IG2 terminal and the power source voltage (exceeding 9.5 V) is applied to the IG1 terminal continuously | - | ◦ | - | ◦ | |
| Detection Time | 4 seconds or more. | 4 seconds or more. | 4 seconds or more. | 4 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.