Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE (ECU-B, MET)
1. Remove the ECU-B fuse from the engine room relay block.
2. Remove the MET fuse from the main body ECU.
3. Measure the resistance.
  Standard Resistance:
  
  Below 1 Ω
4. Reinstall the fuse.
NG: CHECK SHORT CIRCUIT IN COMPONENTS AND WIRES CONNECTED TO FUSE

OK: Go to Next Step

INSPECT COMBINATION METER ASSEMBLY

Disconnect the D1 combination meter connector.

Fig 2: Identifying Combination Meter Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
ET (D1-24) - Body ground	Always	Below 1 Ω

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
IG2 (D1-1) - Body ground	Ignition switch ON	11 to 14V
ECU-B (D1-2) - Body ground	Always	11 to 14V

Reconnect the combination meter connector.

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE COMBINATION METER ASSEMBLY