Inspection Procedure

1. Remove the MPX-B from the engine room No. 1 relay block.
2. Measure the resistance of the fuses.

   Standard: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

Fig 1: Identifying Cowl Side Junction Block LH Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the PL and PA J/B connectors.
2. Measure the resistance and voltage of the wire harness side connectors.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   PA-14 (GND) - Body ground	Below 1 Ω

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   PL-1 (MPX-B) - Body ground	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Cowl Side Junction Block LH And Position Control ECU And Switch Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the V3 ECU connector.
2. Disconnect the LC J/B connector.
3. Disconnect the b7 switch connector.
4. Measure the resistance of the wire harness side connectors.

Standard Resistance 

Result 

B: REPLACE COWL SIDE JUNCTION BLOCK LH AND WIRE HARNESS CONNECTOR 

C: REPAIR OR REPLACE HARNESS AND CONNECTOR 

A: REPLACE COWL SIDE JUNCTION BLOCK LH