Mazda RX-8 Workshop Manual page 530

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Short to ground in wiring harness between cooling fan relay No.3 terminal E and

PCM terminal 1N

Cooling fan relay No.2/No.3 malfunction

PCM connector or terminals malfunction

Short to power supply in wiring harness between cooling fan relay No.2 terminal E

and PCM terminal 1N

Short to power supply in wiring harness between cooling fan relay No.3 terminal E

and PCM terminal 1N

Open circuit in wiring harness between cooling fan relay No.2 terminal E and PCM

Open circuit in wiring harness between cooling fan relay No.3 terminal E and PCM

PCM malfunction

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Troubleshooting