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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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 |
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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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READ NEXT:
SEE MORE:
Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: Make sure to record any output Vehicle Control History codes before clearing them and checking the Vehicle Control History again.
CHECK VEHICLE CONTROL HISTORY (ROAD SIGN ASSIST SYSTEM) (a) Read the Vehicle Control History (RoB) according to the display on the Techs
Freeze Frame Data
FREEZE FRAME DATA CHECK FREEZE FRAME DATA HINT:
The ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored.
(a) Enter the following menus: Powertrain / Radar Cruise1*1 or Radar Cruise2*2 / Trouble Codes.
*1: Output from the ECM
*2: Output f
