DTC P0117[AJ (3.0L Duratec)]

id0102a4804000

DTC P0117

ECT circuit low input
DETECTION CONDITION
•  PCM monitors input voltage from ECT sensor when engine is running. If input voltage at PCM terminal 38 is below 0.2 V, PCM determines that ECT circuit has a malfunction.
POSSIBLE CAUSE
•  ECT sensor malfunction
•  Connector or terminal malfunction
•  Open circuit in wiring between ECT sensor terminal A and PCM terminal 38
•  Short to ground in wiring between ECT sensor terminal A and PCM terminal 38
•  Open circuit in wiring between ECT sensor terminal B and PCM terminal 91
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Check for related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
•  If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect the ECT sensor connector.
•  Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
•  Is there any malfunction?
Yes
Repair or replace terminals, then go to Step 7.
No
Go to next step.
4
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch off.
•  Disconnect PCM connector.
•  Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
•  Is there any malfunction?
Yes
Repair terminal, then go to Step 7.
No
Go to next step.
5
INSPECT ECT SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Disconnect PCM connector.
•  Inspect for continuity between ECT sensor terminal A (harness-side) and PCM terminal 38 (harness-side).
•  Is there any continuity?
Yes
Go to next step.
No
Repair or replace suspected harness, then go to Step 7.
6
INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Inspect for continuity between ECT sensor terminal A (harness-side) and body ground
•  Is there any continuity?
Yes
Repair or replace suspected harness, then go to next step.
No
Replace ECT sensor, then go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P0117 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from memory using M-MDS.
•  Start engine.
•  Perform “KOEO/KOER self-test”
•  Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
•  Perform "AFTER REPAIR PROCEDURE".
•  Is there any DTC present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE[AJ (3.0L Duratec)].)
No
Troubleshooting completed.