Inspection Procedure

1. Disconnect the D13 combination switch connector.
2. Measure the voltage according to the value(s) in the table below.

   Voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   D13-1 (B) - Body ground	Always	10 to 14 V
   D13-2 (IG) - Body ground	Ignition switch off → on (IG)	0 V → 10 to 14 V

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

   Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   D13-5 (E) - Body ground	Always	Below 1 Ω

Fig 1: Identifying D13 Combination Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the D13, D6, and D39*¹ or D37*² ECU connectors.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   D13-6 (MPX1) - D6-21 (MPX2)	Always	Below 1 Ω
   D13-7 (MPX2) - D39-27 (MPX1) *1		Below 1 Ω
   D13-7 (MPX2) - D37-30 (MPX+) *2		Below 1 Ω
   HINT: *1 : w/ Smart key system *2 : w/o Smart key system

   Result 

   RESULT
   
   

   Result	Proceed to
   Both are OK	A
   One is OK	B
   Both are NG	C

Fig 2: Identifying D13, D6, D39 And D37 Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: REPLACE COMBINATION SWITCH AND REPAIR OR REPLACE HARNESS OR CONNECTOR 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: REPLACE COMBINATION SWITCH