DTC C1377/43: Capacitor Malfunction: Description
The brake control power supply (capacitor) is used as auxiliary power for brake control when the auxiliary battery voltage is low.
| DTC Code |
INF Code |
DTC Detection Condition |
Trouble Area |
| C1377/43 |
101 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Brake control power supply is deteriorated (replacement necessary).
|
Brake control power supply |
| ↑ |
102 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Self discharge (current leak) is excessive (internal malfunction).
|
↑ |
| ↑ |
103 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Overvoltage (16.4 V or more) continues to be applied from the auxiliary battery to the capacitor voltage input (+BC) for 10 seconds or more.
|
Positive battery circuit (High voltage) |
| ↑ |
105 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Circuit inside the power back-up unit (charge) is malfunctioning.
|
Brake control power supply |
| ↑ |
106 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Circuit inside the power back-up unit (back-up output circuit) is malfunctioning.
|
↑ |
| ↑ |
108 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Circuit inside the power back-up unit (voltage monitor circuit) is malfunctioning.
|
↑ |
| ↑ |
109 |
Either of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Open circuit between auxiliary battery (12 V) and capacitor power input (+BC terminal).
|
- CAPACITER fuse
- Brake control power supply circuit
|
| ↑ |
110 |
Any of the following is detected:
- IG1 terminal voltage is 9.5 V or more and a malfunction signal (not capacitor communication malfunction) is received for 3 seconds or more.
- Open or short circuit between auxiliary battery (12 V) and capacitor output 1 (OUT1).
- Open or short circuit between auxiliary battery (12 V) and capacitor output 2 (OUT2).
|
Brake control power supply circuit |