LIGHTING (EXT)  LIGHTING SYSTEM  Parking Brake Switch Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the parking brake switch assembly.

WIRING DIAGRAM

E333938E02
1.094,1.073 3.167,1.333 2.073,0.26 10 false Parking Brake Switch Assembly 1.094,0.906 1.51,1.125 0.417,0.219 10 false L17 4.125,1.073 5.74,1.531 1.615,0.458 10 false Instrument Panel Junction Block Assembly 3.792,0.521 4.208,0.74 0.417,0.219 10 false 30 3.781,0.729 4.146,0.938 0.365,0.208 10 false 3E 5.729,0.615 6,0.833 0.271,0.219 10 false 12 5.979,0.719 6.375,0.927 0.396,0.208 10 false PKB 2.406,0.615 2.823,0.833 0.417,0.219 10 false 1 5.427,1.885 5.823,2.094 0.396,0.208 10 false MB 5.427,2.063 7.104,2.542 1.677,0.479 10 false Main Body ECU (Multiplex Network Body ECU)

PROCEDURE

1.READ VALUE USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Data List.


e.

Read the Data List according to the display on the GTS.

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 		-
Body Electrical > Main Body > Data List
Tester Display
Parking Brake SW
50003 123 12
OK:

Normal conditions listed above are displayed.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


NG

2.INSPECT PARKING BRAKE SWITCH ASSEMBLY
2.INSPECT PARKING BRAKE SWITCH ASSEMBLY
a.

Remove the parking brake switch assembly.

Click hereBrake>PARKING BRAKE>PARKING BRAKE SWITCH>REMOVAL


b.

Inspect the parking brake switch assembly.

Click hereBrake>PARKING BRAKE>PARKING BRAKE SWITCH>INSPECTION


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

NG

REPLACE PARKING BRAKE SWITCH ASSEMBLY

Click hereBrake>PARKING BRAKE>PARKING BRAKE SWITCH>REMOVAL


3.CHECK HARNESS AND CONNECTOR (PARKING BRAKE SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3E 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
L17-1 - 3E-30 Always Below 1 Ω
L17-1 or 3E-30 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
E259633C01
4.583,0.167 4.917,0.417 0.333,0.25 1.083,0.167 1.417,0.417 0.333,0.25 3.99,1.417 4.24,0.969 false 0.083,0.083 0.396,0.281 0.313,0.198 10 *a 1.177,0.208 1.49,0.406 0.313,0.198 10 3E 4.656,0.208 4.969,0.406 0.313,0.198 10 MB 3.833,1.438 4.146,1.635 0.313,0.198 10 PKB
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


a.

Remove the instrument panel junction block assembly.

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


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
3E-30 - MB-12 (PKB) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL