Inspection Procedure

1. Remove the SECURITY fuse from the cowl side J/B LH.
2. Measure the resistance of the fuse.

   Standard resistance: 

   Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step. 

1. Disconnect the P33 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   +B1 (P33-1) - Body ground	Always	10 to 14 V

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Specified Condition
   E (P33-17) - Body ground	Below 1 ohms

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 1: Identifying Certification ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step. 

1. Disconnect the P33, RJ and M7 ECU connectors.
2. Measure the resistance between the specified terminals on the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Specified Condition
   MPX1 (P33-27) - MPX1 (RJ-21)	Below 1 ohms
   MPX2 (P33-28) - MPX2 (M7-8)	Below 1 ohms

   Result 

   RESULT DESCRIPTION TABLE
   
   

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

B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE CERTIFICATION ECU 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Main Body ECU RH Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE CERTIFICATION ECU