DTC C1377/43 Capacitor Malfunction: Description
The brake control power supply (capacitor) is used as auxiliary power for brake control when battery voltage is low.
DTC DETECTION CONDITION
| DTC Code |
Information Code |
DTC Detection Condition |
Trouble Area |
| C1377/43 |
101 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Brake control power supply is deteriorated (indicates a need to replace)
|
Brake control power supply |
| ↑ |
102 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Self-discharge (current leak) is excessive (internal malfunction)
|
↑ |
| ↑ |
103 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Overvoltage (16 4 V or more) continues to be applied from the battery to the brake control power supply voltage input (+BC) for 10 seconds or more
|
Positive battery circuit (Apply high voltage) |
| ↑ |
105 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Circuit inside the power back up unit (charge) is malfunctioning
|
Brake control power supply |
| ↑ |
106 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Circuit inside the power back up unit (back up output circuit) is malfunctioning
|
↑ |
| ↑ |
108 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Circuit inside the power back up unit (voltage monitor circuit) is malfunctioning
|
↑ |
| ↑ |
109 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- Open circuit between battery (12 V) and brake control power supply power input (+BC terminal)
|
- ABS MAIN4 fuse
- Harness or connector
|
| ↑ |
110 |
When both conditions below are met
- IG1 terminal voltage is 9 5 V or more, and malfunction signal (not capacitor communication malfunction) reception condition continues for 3 seconds or more
- When either of the following is detected
- Open or short circuit between battery (12 V) and brake control power supply output 1 (OUT1)
- Open or short circuit between battery (12 V) and brake control power supply output 2 (OUT2)
|
- ABS MAIN4 fuse
- Harness or connector
|