| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026CP8 |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (for HV Model): C060962; Electric Parking Brake Switch Signal Compare Failure; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
C060962 |
Electric Parking Brake Switch Signal Compare Failure |
DESCRIPTION
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 |
|
|
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 |
|
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the electric parking brake switch is held near the lock position but not fully in the lock position for 1 second or more, a DTC may be stored due to one of the two contacts being ON while the other is OFF. (This is not a system malfunction.)
PROCEDURE
|
1. |
READ VALUE USING GTS (EPB SWITCH) |
(a) Connect the GTS to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Chassis / Brake/EPB / Data List.
Chassis > Brake > 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 HINT: EPB stands for electric parking brake. |
Chassis > Brake > Data List
|
Tester Display |
|---|
|
EPB Switch |
(d) 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.
OK:
The value of EPB Switch changes between Apply and Release in accordance with switch operation.
| NG |
|
|
|
2. |
CLEAR DTC |
(a) Clear the DTCs.
Chassis > Brake > Clear DTCs
|
|
3. |
CHECK DTC |
(a) Check for DTCs.
Chassis > Brake > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are output |
A |
|
DTCs are not output |
B |
| A |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| B |
|
|
4. |
INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY |
(a) Remove the electric parking brake switch assembly.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; PARKING BRAKE: ELECTRIC PARKING BRAKE SWITCH: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the electric parking brake switch assembly.
Click here
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) |
(a) Disconnect the I159 electric parking brake switch assembly connector.
(b) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A51-31 (SWI1) - I159-7 (SWI1) |
Always |
Below 1 Ω |
|
A51-32 (SWO1) - I159-8 (SWO1) |
Always |
Below 1 Ω |
|
A51-15 (SWI2) - I159-1 (SWI2) |
Always |
Below 1 Ω |
|
A51-16 (SWO2) - I159-2 (SWO2) |
Always |
Below 1 Ω |
|
A51-31 (SWI1) or I159-7 (SWI1) - Body ground |
Always |
10 kΩ or higher |
|
A51-32 (SWO1) or I159-8 (SWO1) - Body ground |
Always |
10 kΩ or higher |
|
A51-15 (SWI2) or I159-1 (SWI2) - Body ground |
Always |
10 kΩ or higher |
|
A51-16 (SWO2) or I159-2 (SWO2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CLEAR DTC |
(a) Clear the DTCs.
Chassis > Brake > Clear DTCs
(b) Turn the power switch off.
|
|
7. |
CHECK DTC |
(a) Check for DTCs.
Chassis > Brake > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are output |
A |
|
DTCs are not output |
B |
| A |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| B |
|
|
|