When the electric parking brake switch is pulled, a lock request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly. When the electric parking brake switch is pushed, a release request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| C060962 | Electric Parking Brake Switch Signal Compare Failure | ·
Open or short detected in parking brake switch circuit for 1 second or more ·
Stuck parking brake switch detected (when parked: 30 seconds, when driving: 1 second, during engine stall: 1 second) ·
Stuck parking brake switch detected 3 times in succession when being operated |
·
Electric parking brake switch assembly ·
Wire harness or connector ·
Skid control ECU (brake actuator assembly) |
DTC stored | An electric parking brake system malfunction is displayed on the multi-information display. |
| Vehicle Condition | |||||||
|---|---|---|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | Pattern 6 | ||
| Diagnosis Condition | Vehicle is stopped | - | - | ○ | - | - | - |
| Vehicle is being driven | - | - | - | ○ | - | - | |
| During initial check | - | - | - | - | ○ | - | |
| Parking brake switch is being operated | - | - | - | - | - | ○ | |
| Malfunction Status | Open detected in parking brake switch circuit | ○ | - | - | - | - | - |
| Short detected in parking brake switch circuit | - | ○ | - | - | - | - | |
| Stuck parking brake switch detected | - | - | ○ | ○ | ○ | ○ | |
| Detection Time | 1 second or more | 1 second or more | 30 seconds or more | 1 second or more | 1 second or more | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | 3 trip | |
DTC will be output when conditions for either of the patterns in the table above are met.
Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Chassis / Brake/EPB / Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| EPB Switch | Electric parking brake switch input | Neutral / Apply / Release / Unknown | Neutral: Lock switch and release switch are off
Apply: Lock switch on Release: Release switch on |
When not normal, electric parking brake switch release side system may be malfunctioning
|
| Tester Display |
|---|
| EPB Switch |
Operate the electric parking brake switch and check that the value of "EPB Switch" in the Data List changes between Apply and Release in accordance with the operation of the switch.
The value of EPB Switch changes between Apply and Release in accordance with switch operation.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Clear the DTCs.
| Proceed to |
|---|
| NEXT |
NEXT
Check for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
A
B
Remove the electric parking brake switch assembly.
Inspect the electric parking brake switch assembly.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the I183 electric parking brake switch assembly connector.
Disconnect the A144 skid control ECU (brake actuator assembly) connector.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A144-31 (SWI1) - I183-7 (SWI1) | Always | Below 1 Ω |
| A144-32 (SWO1) - I183-8 (SWO1) | Always | Below 1 Ω |
| A144-15 (SWI2) - I183-1 (SWI2) | Always | Below 1 Ω |
| A144-16 (SWO2) - I183-2 (SWO2) | Always | Below 1 Ω |
| A144-31 (SWI1) or I183-7 (SWI1) - Body ground | Always | 10 kΩ or higher |
| A144-32 (SWO1) or I183-8 (SWO1) - Body ground | Always | 10 kΩ or higher |
| A144-15 (SWI2) or I183-1 (SWI2) - Body ground | Always | 10 kΩ or higher |
| A144-16 (SWO2) or I183-2 (SWO2) - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Clear the DTCs.
Turn the power switch off.
| Proceed to |
|---|
| NEXT |
NEXT
Check for DTCs.
| Result | Proceed to |
|---|---|
| DTCs are output | A |
| DTCs are not output | B |
A
B