Parking Brake Switch Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch on (IG).
3. Turn Techstream on.
4. Select the following menu items: Body Electrical / Main Body / Data List.
5. Read the display on Techstream.
   MAIN BODY:
   
   

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

   OK

   Normal conditions listed above are displayed.

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE 

NG: Go to next step 

1. Remove the parking brake switch assembly.
   Fig 1: Inspecting Parking Brake Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   1 - Switch body	Shaft is pushed in	10 kΩ or higher
   1 - Switch body	Shaft is not pushed in	Below 1 Ω

NG → REPLACE PARKING BRAKE SWITCH ASSEMBLY 

OK: Go to next step 

1. Check the vehicle condition.

   Result

   Condition	Proceed to
   with Pedal Type Parking Brake	A
   with Lever Type Parking Brake	B

B → See step   5 

A: Go to next step 

1. Disconnect the IC instrument panel J/B assembly connector.
   Fig 2: Identifying IC Instrument Panel J/B Assembly Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A18 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   IC-14 - A18-1	Always	Below 1 Ω
   IC-14 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE 

1. Disconnect the IM instrument panel J/B assembly connector.
   Fig 3: Checking Harness And Connector (Switch -- Instrument Panel J/B Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E33 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   IM-2 - E33-1	Always	Below 1 Ω
   IM-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE