| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GL62 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 11/2022] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): Parking Brake Switch Circuit; 2020 - 2023 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 11/2022] | ||
|
Parking Brake Switch Circuit |
DESCRIPTION
This circuit is from the skid control ECU (brake actuator assembly)*1 or parking brake switch assembly*2 to the radio and display receiver assembly.
- *1: w/ Electric Parking Brake System
- *2: w/o Electric Parking Brake System
WIRING DIAGRAM
w/ Electric Parking Brake System
w/o Electric Parking Brake System
PROCEDURE
|
1. |
CHECK MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/o Electric Parking Brake System |
A |
|
w/ Electric Parking Brake System |
B |
| B |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the I56 radio and display receiver assembly connector.
(b) Disconnect the I122 parking brake switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I56-20 (PKB) - I122-1 (+) |
Always |
Below 1 Ω |
|
I56-20 (PKB) or I122-1 (+) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT PARKING BRAKE SWITCH ASSEMBLY |
(a) Inspect the parking brake switch assembly.
Click here
![2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; PARKING BRAKE: PARKING BRAKE SWITCH: INSPECTION](/t3Portal/stylegraphics/info.gif)
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
| NG |
|
REPLACE PARKING BRAKE SWITCH ASSEMBLY
|
|
4. |
CHECK PARKING BRAKE INDICATOR |
(a) Check that the parking brake indicator comes on when the parking brake is applied and goes off when it is released.
OK:
The parking brake indicator operates as specified above.
| NG |
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the I56 radio and display receiver 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 |
|---|---|---|
|
I56-20 (PKB) - A51-35 (PKB) |
Always |
Below 1 Ω |
|
I56-20 (PKB) or A51-35 (PKB) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|