ON-BOARD DIAGNOSTIC
F2–111
F2
DTC P0117
A6E407001082214
Diagnostic procedure
DTC P0117 ECT sensor circuit low input
DETECTION
CONDITION
• PCM monitors input voltage from ECT sensor while engine is running. If input voltage from ECT sensor is
below 0.1 V, PCM determines ECT sensor circuit low input.
POSSIBLE
CAUSE
• ECT sensor malfunction
• Connector or terminal malfunction
• Short to GND in wiring between ECT sensor terminal A and PCM terminal 87
• ECT sensor signal and GND circuits short each other
• PCM malfunction
ECT SENSOR
A
B
5 6
2
5
4
6
2
87
91
B
A
PCM
91
87
ECT SENSOR
HARNESS SIDE CONNECTOR
PCM
HARNESS SIDE CONNECTOR
STEP INSPECTION ACTION
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform “DTC Confirmation Procedure”.
(See F2–85 DTC CONFIRMATION
PROCEDURE)
• Is same DTC present during KOEO or KOER
self-test?
Yes Go to next step.
No Intermittent concern exists. Go to “Intermittent Concern
Troubleshooting”.
(See F2–227 INTERMITTENT CONCERN
TROUBLESHOOTING)
2 INSPECT POOR CONNECTION OF ECT
SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
Yes Repair or replace suspected terminal, go to Step 7.
No Go to next step.
3 CLASSIFY ECT SENSOR MALFUNCTION OR
HARNESS MALFUNCTION
• Turn engine switch to ON (Engine OFF).
• Disconnect ECT sensor connector.
• Access ECT PID using WDS or equivalent.
• Is ECT PID below 0.1 V?
Yes Go to next step.
No Replace ECT sensor, go to Step 7.
(See F2–76 ENGINE COOLANT TEMPERATURE (ECT)
SENSOR REMOVAL/INSTALLATION)
4 INSPECT ECT SENSOR SIGNAL CIRCUIT FOR
SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between ECT sensor
terminal A and body GND.
• Is there continuity?
Yes Repair or replace harness for short to GND, go to Step 7.
No Go to next step.
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