DTC C1377: Capacitor Malfunction [10/2020 - 10/2023]: Description
The brake control power supply with bracket assembly is used as auxiliary power for brake control when the auxiliary battery voltage is low.
| DTC No. | Detection Item | INF Code | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|---|
| C1377 | Capacitor Malfunction | 101 102 103 105 106 108 109 110 |
|
|
Does not come on | - |
DTC DETECTION CONDITIONS: C1377 INF CODE: 101
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Brake control power supply with bracket assembly is deteriorated (replacement necessary). | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 102
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Self discharge (current leak) is excessive (internal malfunction). | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 103
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Overvoltage (16.4 V or more) continues to be applied from the auxiliary battery to the brake control power supply with bracket assembly voltage input (+BC) for 10 seconds or more. | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 105
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Circuit inside the power back up unit (charge) is malfunctioning. | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 106
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Circuit inside the power back up unit (back up output circuit) is malfunctioning. | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 108
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Circuit inside the power back up unit (voltage monitor circuit) is malfunctioning. | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 109
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - |
| Open circuit between auxiliary battery (12 V) and brake control power supply with bracket assembly power input (+BC terminal). | - | ◦ | |
| Detection Time | 3 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS: C1377 INF CODE: 110
| Vehicle Condition | ||||||
|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | ||
| Diagnosis Condition | IG1 terminal voltage is 9.5 V or more | ◦ | - | - | - | - |
| Malfunction Status | A malfunction signal (not communication malfunction) is received from the brake control power supply with bracket assembly | ◦ | - | - | - | - |
| Open between auxiliary battery (12 V) and brake control power supply with bracket assembly output 1 (OUT1) | - | ◦ | - | - | - | |
| Short circuit between auxiliary battery (12 V) and brake control power supply with bracket assembly output 1 (OUT1) | - | - | ◦ | - | - | |
| Open between auxiliary battery (12 V) and brake control power supply with bracket assembly output 2 (OUT2) | - | - | - | ◦ | - | |
| Short circuit between auxiliary battery (12 V) and brake control power supply with bracket assembly output 2 (OUT2) | - | - | - | - | ◦ | |
| Detection Time | 3 seconds or more | - | - | - | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |