Circuit Opening Relay: Inspection

INSPECT CIRCUIT OPENING RELAY

Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (Apply battery voltage between terminals 1 and 2)

If the result is not as specified, replace the relay.

Fig 1: Identifying A/F Sensor Heater Relay