Parking Brake Switch Circuit [12/2012 - ]: Procedure

1. Using the Techstream, read the Data List.

   Refer to DATA LIST / ACTIVE TEST [12/2012 - ]

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Parking Brake SW	Parking brake switch signal	ON or OFF	ON: Parking brake switch on OFF: Parking brake switch off	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Parking Brake SW

   OK

   The display is as specified in the normal condition column.

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE: 

Refer to PROBLEM SYMPTOMS TABLE [12/2012 - 10/2015] to PROBLEM SYMPTOMS TABLE [10/2015 - ] .

Result: 

NG 

See step  2

1. Remove the parking brake switch assembly.

   Refer to REMOVAL [12/2012 - ] .

2. Inspect the parking brake switch assembly.

   Refer to INSPECTION [12/2012 - ] .

Result: 

NG 

REPLACE PARKING BRAKE SWITCH ASSEMBLY. Refer to  REMOVAL [12/2012 - ]  . 

Result: 

OK 

See step  3

1. Disconnect the G37 parking brake switch assembly connector.
2. Disconnect the 3D instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G37-1 - 3D-34	Always	Below 1 Ω
   G37-1 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [12/2012 - ] .

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-12 (PKB) - 3D-34	Always	Below 1 Ω

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [12/2012 - ]  . 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2012 - ]  .