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4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS 6E–255 DIAGNOSTIC TROUBLE CODE (DTC) P1173 (SYMPTOM CODE 3) (FLASH CODE 22) FUEL REDUCTION CAUSED BY HIGH COOLANT TEMPERATURE DIAGNOSTIC TROUBLE CODE (DTC) P1173 (SYMPTOM CODE 7) (FLASH CODE 22) FUEL REDUCTION CAUSED BY HIGH FUEL TEMPERATURE DIAGNOSTIC TROUBLE CODE (DTC) P1173 (SYMPTOM CODE A) (FLASH CODE 22) FUEL REDUCTION CAUSED BY LOW TEMPERATURE Condition for setting the DTC and action taken when the DTC sets Circuit Description The engine coolant temperature (ECT) sensor is Diagnostic Aids An intermittent may be caused by the following: • Poor connections. • Misrouted harness. • Rubbed through wire insulation. • Broken wire inside the insulation. • Poor connection at ECM and PSG-Inspect harness connectors for backed out terminals, improper • Damaged harness-Inspect the wiring harness for damage. If the harness appears to be OK, observe Diagnostic Trouble Code (DTC) P1173 (Symptom Code 3) (Flash Code 22) Fuel Reduction Caused By High Coolant Temperature Flash Code Code Symptom Code MIL DTC Name DTC Setting Condition Fail-Safe (Back Up) 22 P1173 3 OFF Fuel Reduction Caused By Excessive high engine cool- No fail-safe function. 7 OFF Fuel Reduction Caused By Fuel temperature is more than PSG (pump control unit) con- A OFF Fuel Reduction Caused By Excessive low fuel tempera- No fail-safe function. Step Action Value(s) Yes No 1 Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to On Board Diagnostic (OBD) System Check 2 1. Connect the Tech 2. 2. Review and record the failure information. 3. Select “F0: Read DTC Infor As Stored By ECU” in “F0: Diagnostic Trouble Codes”. Is the DTC P1173 (Symptom Code 3) stored as — Go to Step 3 Refer to Diagnostic Aids and Go to Step 3 |