DTC P0117:00 [MZR-CD 2.2]

id0102f3701600

DTC P0117:00

Engine coolant temperature (ECT) sensor circuit low input
DETECTION CONDITION
•  The PCM monitors the input signal from the ECT sensor. If the voltage from the ECT sensor is less than 0.13 V, the PCM determines that there is a malfunction in the ECT sensor circuit.
Monitoring condition
•  Battery voltage: 8—20 V
Diagnostic support note
•  The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.
•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the PCM memory.
•  Engine overheating (cooling system malfunction)
POSSIBLE CAUSE
•  Engine overheating (Cooling system malfunction)
•  ECT sensor connector or terminal malfunction
•  Short to ground in wiring harness between ECT sensor terminal A and PCM terminal 1BF
•  ECT sensor malfunction
•  PCM connector or terminal malfunction
•  PCM malfunction

Diagnostic procedure

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 SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform the repair or diagnosis according to the available Service 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 M-MDS to the DLC-2.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the PENDING CODE for this DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
(See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4
VERIFY ENGINE CONDITION
•  Is the engine overheating.
Yes
Perform the symptom troubleshooting No.19 Cooling system concerns-Overheating procedure.
(See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)
No
Go to the next step.
5
INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to 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.
6
INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Switch the ignition to off.
•  Disconnect the ECT sensor connector.
•  Inspect for continuity between ECT sensor terminal A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
No
Go to the next step.
7
INSPECT ECT SENSOR
•  Inspect the ECT sensor.
•  Is there any malfunction?
Yes
Replace the ECT sensor, then go to Step 8.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to 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.
9
VERIFY TROUBLESHOOTING OF DTC P0117:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
No
DTC troubleshooting completed.