Mazda 3 - Dtc P0118 [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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4
INSPECT ECT SENSOR SIGNAL
CIRCUIT FOR SHORT TO GND
• Turn the ignition switch off.
• 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 7.
No
Go to the next step.
5
INSPECT ECT SENSOR
• Inspect the ECT sensor.
(See ENGINE COOLANT TEMPERATURE
(ECT) SENSOR INSPECTION [Z6].)
• Is there any malfunction?
Yes
Replace the ECT sensor, then go to Step 7.
(See ENGINE COOLANT TEMPERATURE
(ECT) SENSOR REMOVAL/INSTALLATION
[Z6].)
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition 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.
7
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.
(See PCM REMOVAL/INSTALLATION [Z6].)
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR PROCEDURE [Z6].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [Z6].)
No
DTC troubleshooting completed.
DTC P0118 [Z6]
B3E010200100W07
DTC P0118
ECT sensor circuit high input