Toyota Camry (XV70): Parking Brake Switch Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
Click here .gif)
- *: w/ Smart Key System
PROCEDURE
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1. | READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Parking Brake SW | Parking brake switch signal |
OFF or ON | OFF: Parking brake switch off ON: Parking brake switch on |
- |
|
Tester Display |
|---|
|
Parking Brake SW |
OK:
Normal conditions listed above are displayed.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
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2. | INSPECT PARKING BRAKE SWITCH ASSEMBLY |
(a) Remove the parking brake switch assembly.
Click here
(b) Inspect the parking brake switch assembly.
Click here
| NG | |
REPLACE PARKING BRAKE SWITCH ASSEMBLY
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|
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3. | CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 3C instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
A4-1 - 3C-18 | Always |
Below 1 Ω |
|
A4-1 or 3C-18 - Body ground |
Always | 10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. | INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
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*a | Component without harness connected (Instrument Panel Junction Block Assembly) |
- | - |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
3C-18 - MB-12 (PKB) |
Always | Below 1 Ω |
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
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