Inspection Procedure

1. Remove the P-IG1-1, P MPX-B and P-ACC fuses from passenger side junction block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   FUSE (P-IG1-1, P MPX-B AND P-ACC)
   
   

   Tester Connection	Condition	Specified Condition
   P-IG1-1 fuse	Always	Below 1 Ω
   P MPX-B fuse	Always	Below 1 Ω
   P-ACC fuse	Always	Below 1 Ω

NG: REPLACE FUSE 

OK: GO TO NEXT STEP 

Fig 1: Identifying Terminals Of L90 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the L90 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   ECU - BATTERY AND BODY GROUND RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   L90-4(GND1)-Body ground	Always	Below 1 Ω

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

   Standard voltage 

   ECU - BATTERY AND BODY GROUND VOLTAGE
   
   

   Tester Connection	Switch Condition	Specified Condition
   L90-1 (IG) - Body ground	Always	11 to 14 V
   L90-6 (+B) - Body ground	Engine switch on (IG)	11 to 14 V
   L90-14(ACC)-Body ground	Engine switch on (ACC)	11 to 14 V

B: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE