Mazda RX-8 Manual page 542

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Table of Contents

Front HO2S Heater Resistance Inspection

1. Disconnect the front HO2S connector.

2. Measure the resistance between front HO2S terminals C and D.

If not within the specification, replace the front HO2S. (See FRONT HEATED OXYGEN

SENSOR (HO2S) REMOVAL/INSTALLATION .)

Front HO2S heater resistance

2.162.90 ohms [20 °C {68 °F}]

Circuit Open/Short Inspection

1. Disconnect the PCM connector.

2. Disconnect the front HO2S connector.

3. Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Engine Specifications

Troubleshooting