DTC C13A3: Open or Short Circuit in Lock Switch Circuit; DTC C13AB: Lock Switch Circuit Comparison [10/2020 - 10/2023]: Description
When the electric parking brake switch assembly is pushed to the lock side, a lock request signal is output to the parking brake ECU assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| C13A3 | Open or Short Circuit in Lock Switch Circuit | Detection Condition 1:
Detection Condition 2:
HINT: *: This value is based on the assumption that the BECU terminal voltage is 11 V. The threshold changes according to the BECU terminal voltage. For details, refer to "Threshold Changes According to BECU Terminal Voltage". |
|
Yes | An electric parking brake system malfunction is displayed on the multi-information display. |
| C13AB | Lock Switch Circuit Comparison |
|
|
Yes | An electric parking brake system malfunction is displayed on the multi-information display. |
| Vehicle Condition | |||||
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | ||
| Diagnosis Condition | Electric parking brake switch assembly is operated to lock side with power switch off | ◦ | ◦ | - | - |
| Power switch on (IG) | - | - | ◦ | ◦ | |
| Malfunction Status | LCK1 terminal voltage is below 2.3 V | ◦ | - | ◦ | - |
| LCK1 terminal voltage is 4.35 V or more | - | ◦ | - | ◦ | |
| Detection Time | Approximately 1 second | Approximately 1 second | Approximately 1 second | Approximately 1 second | |
| Trip Count | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
If the conditions match either of these patterns, a DTC will be output.
| Vehicle Condition | |||||
| Pattern 5 | Pattern 6 | Pattern 7 | Pattern 8 | ||
| Diagnosis Condition | Electric parking brake switch assembly is operated to lock side with power switch off | ◦ | ◦ | - | - |
| Power switch on (IG) | - | - | ◦ | ◦ | |
| Malfunction Status | LCK2 terminal voltage is below 1.4 V (*) | ◦ | - | ◦ | - |
| LCK2 terminal voltage is above 9 V (*) | - | ◦ | - | ◦ | |
| Detection Time | Approximately 1 second | Approximately 1 second | Approximately 1 second | Approximately 1 second | |
| Trip Count | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
- If the conditions match either of these patterns, a DTC will be output.
- *: This value is based on the assumption that the BECU terminal voltage is 11 V.
The threshold changes according to the BECU terminal voltage.
For details, refer to "Threshold Changes According to BECU Terminal Voltage".
Threshold Changes According to BECU Terminal Voltage
| *a | BECU Terminal Voltage (V) |
| *b | LCK2 Terminal Voltage (V) |
| *c | Normal Range |
| *d | DTC Detection Range |
| Vehicle Condition | |||
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | Electric parking brake switch assembly is operated to lock side with power switch off | ◦ | - |
| Power switch on (IG) | - | ◦ | |
| Malfunction Status | Lock 1 switch and lock 2 switch ON/OFF evaluations do not match | ◦ | ◦ |
| Detection Time | Repeats 5 times | Repeats 5 times | |
| Trip Count | 1 trip | 1 trip | |
HINT:
If the conditions match either of these patterns, a DTC will be output.