Mazda 6 - Dtc P0118

ON-BOARD DIAGNOSTIC
F2–75
F2
Diagnostic procedure
End Of Sie
DTC P0118
B6E407000100112
STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related service repair information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes Go to the next step.
No Intermittent concern exists.
Perform the “INTERMITTENT CONCERNS
TROUBLESHOOTING”.
4 INSPECT ECT SENSOR CONNECTOR FOR
POOR CONNECTION
• Turn the engine switch off.
• Disconnect the ECT sensor connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes Repair or replace the terminal, then go to Step 8.
No Go to the next step.
5 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR
SHORT TO GND
• Turn the engine switch off.
• Disconnect the ECT sensor connector.
• Inspect for continuity between ECT sensor
terminal A (wiring harness-side) and body
GND.
• Is there continuity?
Yes Repair or replace the wiring harness for a possible short to
GND, then go to Step 8.
No Go to the next step.
6 INSPECT ECT SENSOR
• Inspect the ECT sensor.
• Is there any malfunction?
Yes Replace the ECT sensor, then go to Step 8.
No Go to the next step.
7 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the engine switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes Repair or replace the terminal, then go to the next step.
No Go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P0117
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes Replace the PCM, then go to the next step.
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
(See F2–39 OBD DRIVE MODE.)
• Are any DTCs present?
Yes Go to the applicable DTC inspection.
(See F2–40 DTC TABLE.)
No DTC troubleshooting completed.
DTC P0118 Engine coolant temperature (ECT) sensor circuit high input
DETECTION
CONDITION
• The PCM monitors the input signal from the engine coolant temperature sensor. If the voltage from the
engine coolant temperature sensor is more than 4.92 V, the PCM determines that there is a malfunction in
the engine coolant temperature sensor circuit.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.