Toyota Camry (XV70): Parking Brake Switch Circuit
DESCRIPTION
This circuit is from the parking brake switch assembly*1 or skid control ECU (Brake Actuator Assembly)*2 to the radio and display receiver assembly.
- *1: w/o Electric Parking Brake System
*2: w/ Electric Parking Brake System
WIRING DIAGRAM
w/o Electric Parking Brake System
w/ 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 |
.gif) | GO TO STEP 4 |
|
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| 2. |
CHECK BRAKE WARNING LIGHT |
(a) Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.
OK:
The brake warning light operates as specified above.
| NG | | GO TO BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS
|
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|
| 3. |
CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the K2 radio and display receiver assembly connector.
(b) Disconnect the A4 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 |
|---|---|---|
|
K2-20 (PKB) - A4-1 | Always |
Below 1 Ω |
|
K2-20 (PKB) or A4-1 - 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 |
| 4. |
CHECK BRAKE WARNING LIGHT |
(a) Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.
OK:
The brake warning light operates as specified above.
| NG | | GO TO BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS
|
|
| 5. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the K2 radio and display receiver assembly connector.
(b) Disconnect the A34 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 |
|---|---|---|
|
K2-20 (PKB) - A34-33 (PKB) |
Always | Below 1 Ω |
|
K2-20 (PKB) or A34-33 (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 |
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SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT BRAKE CYLINDER AND PISTON
(a) Check the rear disc brake cylinder bore and rear disc brake piston for rust and scoring. If necessary, replace the rear disc brake cylinder and rear disc brake piston.
2. INSPECT PAD LINING THICKNESS
(a) Using a ruler, measure t
Installation
INSTALLATION CAUTION / NOTICE / HINT
NOTICE:
Immediately after installing the brake pads, the braking performance may be reduced. Always perform a road test in a safe place while paying attention to the surroundings.
After replacing the rear disc brake pads, the brake pedal may feel soft
