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Home >> Suzuki >> 2005 >> Verona EX >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P1668 Engine Coolant Temperature Output Circuit >> DTC Troubleshooting
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DTC Troubleshooting

DIAGNOSIS PROCEDURE - DTC P1668 ENGINE COOLANT TEMPERATURE OUTPUT CIRCUIT

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD) System Check.
Is the system check complete?		 - Go to Step 2. Go to "ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK ".
2
  1. Turn the ignition switch to LOCK.
  2. Connect the scan tool to the DLC.
  3. Turn the ignition switch to ON.

Are any Diagnostic Trouble Codes (DTCs) displayed?		 - Go to Step 3. Try with another scan tool
3 Refer to the applicable DTC TABLE . Start with the DTC with the lowest numerical value and move up.
Is the DTC identified as valid trouble code P1668?		 - Go to Step 4. Go to applicable DTC TABLE 
4
  1. Disconnect the cluster connector.
  2. Turn the ignition switch to LOCK.
  3. Check for an open or short to ground in the wire between the ECM connector 85 and cluster connector terminal C8.
 - Go to Step 6. Go to Step 5.
5
  1. Turn the ignition switch to LOCK.
  2. Check for short to battery in the wire between the ECM connector 85 and cluster connector terminal C8.

Is the problem found?		 - Go to Step 6. Go to Step 7.
6 Repair the wire or the connector terminal as needed.
Is the repair complete?		 - Go to Step 9. -
7 Replace the cluster.
Is the replace complete?		 - Go to Step 9. -
8 Replace the ECM.
Is the replace complete?		 - Go to Step 9. -
9
  1. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic has run and passed?		 - Go to Step 10. Go to Step 2.
10 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC TABLE . System OK
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