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Home >> Suzuki >> 2006 >> Verona Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0030 Through P0175 >> DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Value (s) Yes No
1 Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
Is the system check complete?		 - Go to Step 2. Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
2 Check for DTC P0117 or DTC P0118 with a scan tool.
Is DTC P0117 or P0118 present?		 - Go to applicable DTC Table . Go to Step 3.
3
  1. Measure the actual Engine Coolant Temperature (ECT).
  2. Turn the ignition ON, leaving the engine OFF.
  3. Observe the ECT sensor parameter on the scan tool.

Is the ECT sensor value near the actual coolant temperature?		 - Go to Step 11. Go to Step 4.
4
  1. Disconnect the ECT sensor electrical connector.
  2. Observe the ECT sensor parameter on the scan tool.

Is the ECT below the specified value?		 -30 °C (-22 ° F) Go to Step 5. Go to Step 8.
5
  1. Jumper the ECT sensor input circuit and the ground circuit together at the ECT sensor harness connector.
  2. Observe the ECT sensor parameter on the scan tool.

Is the ECT above the specified value?		 180 °C (356 ° F) Go to Step 13. Go to Step 6.
6
  1. Jumper the ECT sensor input circuit to chassis ground.
  2. Observe the ECT sensor parameter on the scan tool.

Does the ECT above the specified value?		 180 °C (356 ° F) Go to Step 7. Go to Step 8.
7 Repair the open or electrical resistance in the ECT sensor ground circuit.
Is the repair complete?		 - Go to Step 14. Go to Step 9.
8
  1. Turn the ignition OFF.
  2. Disconnect the ECM electrical connector.
  3. Check the ECT sensor input circuit for a short or a high electrical resistance.
  4. Repair as necessary.

Was a repair necessary?		 - Go to Step 14. Go to Step 9.
9
  1. Check for a faulty connection at the ECM and the ECT electrical connectors.
  2. Repair as necessary.

Was a repair necessary?		 - Go to Step 14. Go to Step 10.
10 Replace the ECM.
Is the replace complete?		 - Go to Step 14. -
11
  1. Inspect the engine cooling system for any of the following conditions:
    • A faulty thermostat.
    • A low coolant level.
    • An incorrect coolant.
    • Any faulty cooling system operation.
  2. Repair as necessary.

Was a repair necessary?		 - Go to Step 14. Go to Step 12.
12
  1. Using a scan tool, clear the DTC.
  2. Operate the vehicle within the Freeze Frame conditions as specified.

Does DTC P0116 set?		 - Go to Step 13. Go to Diagnostic Aids .
13 Replace the ECT sensor.
Is the replace complete?		 - Go to Step 14. -
14
  1. Start the engine.
  2. Operate the vehicle within the conditions for setting the DTC as specified in the supporting text or until the DTC P0116 diagnostic test has run.

Does the DTC run and pass?		 - Go to Step 15. Go to Step 2.
15 With a scan tool, observe the stored information.
Does the scan tool display any DTCs that you have not diagnosed?		 - Go to applicable DTC Table . System OK
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