Inspection Procedure

Engine Room R/B:

ECU-B

Engine Room R/B:

ECU-B

Yaris Fuses

Main Body ECU:

(a) Remove the ECU-B fuse from the engine room relay block.

(b) Remove the MET fuse from the main body ECU.

(c) Measure the resistance. Standard Resistance:

Below 1Q

(d) Reinstall the fuse.

CHECK SHORT CIRCUIT IN COMPONENTS AND WIRES CONNECTED TO FUSE

INSPECT COMBINATION METER ASSEMBLY

Ecu Voltage Resistance

(a) Disconnect the D1 combination meter connector.

(b) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

ET (D1-24) - Body ground

Always

Below 1 Q

(c) Measure the voltage. Standard voltage

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

(d) Reconnect the combination meter connector. NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

REPLACE COMBINATION METER ASSEMBLY

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