Air Fuel Ratio Sensor Relay: Inspection

INSPECT AIR FUEL RATIO SENSOR RELAY

Inspect A/F relay
1. Using an ohmmeter, measure the resistance between the terminals.

Fig 1: Identifying Air Fuel Ratio Sensor Relay Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1F-1 - 1C-6	10 kΩ or higher
1F-1 - 1C-6	Below 1Ω (Apply battery voltage to terminals 1D-5 and 1H-2)

If the result is not as specified, replace the engine room junction block assembly.