Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: It is necessary to register an ID code after replacing the tire pressure monitor valve and/or the tire pressure warning ECU (see REGISTRATION ).

INSPECT FUSE (ECU-IG1)
1. Remove the ECU-IG1 fuse from the instrument panel junction block.
2. Measure the resistance of the fuse.
  Standard resistance: Below 1 Ω
  
  NG: REPLACE FUSE
  
  OK: GO TO NEXT STEP.

INSPECT IG1 RELAY

Remove the IG1 relay from the instrument panel junction block.

Measure the resistance of the relay.

Standard resistance

Fig 1: Identifying IG1 Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL CHECK CHART

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

NG: REPLACE IG1 RELAY

OK: GO TO NEXT STEP.

INSPECT WIRE HARNESS (ECU - BATTERY AND BODY GROUND)

Disconnect the E56 ECU connector.

Measure the voltage of the wire harness side connector.

Standard voltage

Fig 2: Identifying Wire Harness (ECU - Battery And Body Ground) Connector Terminals

TERMINAL VOLTAGE CHART

Tester Connection	Switch Condition	Specified Condition
E56-2 (IG) - Body ground	Ignition switch ON	10 to 14 V
E56-2 (IG) - Body ground	Ignition switch OFF	Below 1 V

Measure the resistance of the wire harness side connector.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Specified Condition
E56-11 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

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