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Inspection Of Resistance

NOTE:

Perform the following test only when directed.

Disconnect the HO2S connector.
Measure the resistance between HO2S terminals C and D using an ohmmeter.
- If not as specified, replace the HO2S.
- If HO2S heater is okay, but PID value is out of specification, perform the "Circuit Open/Short Inspection". See CIRCUIT OPEN/SHORT INSPECTION .
Specification
1. 4-20 ohms (Front)
2. 13-45 ohms (Rear)
Fig 1: Identifying Front & Rear Heated Oxygen Sensor [BP, BP With TC] Part Side Connector Terminals
Courtesy of MAZDA MOTORS CORP.
Reconnect the HO2S connector.