Inspection Procedure

NOTE: It is necessary to perform initialization (See INITIALIZATION ) after registration (See REGISTRATION ) of the transmitter IDs into the tire pressure warning ECU, after the ECU has been replaced.

INSPECT FUSE (ECU IG NO. 1)
1. Remove the ECU IG NO. 1 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 IGNITION RELAY NO. 1

Remove the IG1 relay from the instrument panel junction block.

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

Standard resistance

RESISTANCE SPECIFIED CONDITION

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)

Fig 1: Identifying IG1 Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGNITION RELAY NO. 1

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)

Disconnect the E60 ECU connector.

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
E60-7 (IG) - Body ground	Ignition switch on (IG)	10 to 14 V
E60-7 (IG) - Body ground	Ignition switch off	Below 1 V

Fig 2: Identifying E60 ECU Connector

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

Standard resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Specified Condition
E60-9 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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