Inspection Procedure

1. Remove the D MPX-B1 fuse from the main body ECU.
2. Remove the P IG2 fuse from the passenger side junction block.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specified Condition
   D MPX-B1 fuse	Always	Below 1 Ω
   P IG2 fuse

NG: REPLACE FUSE 

OK: Go to next step 

1. Disconnect the L10 ECU connector.
2. Measure the resistance and voltage according to the value(s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specified Condition
   L10-17 (E2) - Body ground	Always	Below 1 Ω
   L10-18 (ES) - Body ground

   Standard voltage 

   STANDARD VOLTAGE TABLE
   
   

   Tester Connection	Switch Condition	Specified Condition
   L10-14 (IG2) - Body ground	Engine switch on (IG)	11 to 14 V
   L10-13 (B) - Body ground	Always

   Fig 1: Identifying L10 ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE NO. 1 METER ECU  (See DISASSEMBLY  )