Mazda RX-8 Workshop Manual page 2467

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2011 - RX-8 - HVAC
DTC 15
DTC 15 ECT sensor system inspection
POSSIBLE
CAUSE
Diagnostic Procedure
STEP
VERIFY THAT THE DTC OF THE PCM
1
Connect the M-MDS to the DLC-2.
Verify that the DTC of the PCM.
(See ON-BOARD DIAGNOSTIC TEST
Is displayed P0117 or P0118?
2 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
Disconnect the A/C amplifier connector (16-pin) and the PCM connector
(60-pin).
Is there an open circuit in the wiring harness between A/C amplifier
connector (16-pin) terminal 2O and PCM connector terminal 1AN?
3 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO
GROUND
Is there a short circuit to ground in the wiring harness between A/C
amplifier connector (16-pin) terminal 2O and PCM connector terminal
1AN?
ECT sensor malfunction
PCM malfunction
Open or short circuit in wiring harnesses between ECT sensor connector and PCM connector
Open circuit in wiring harness between A/C amplifier connector terminal 2O and PCM connector terminal
1AN
Short to ground in wiring harness between A/C amplifier connector terminal 2O and PCM connector
terminal 1AN
INSPECTION
[13B-MSP].)
ACTION
YesPerform troubleshooting according to the
corresponding DTC inspection.
No Go to the next step.
YesRepair the wiring harness.
No Go to the next step.
YesRepair the wiring harness.
No The system is normal at present. (Clear
the past malfunction from memory.)