Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

Crank the engine for up to 30 seconds.
Observe the Engine DTC information with a scan tool.
- If any of the following DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle to diagnose those DTCs P0201-P0208, P0230, P0335, P0336, P0340, P0403, P0404, P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, P0641, P0651, P0685, P0689, P0690, P1516, P2610.
Install a spark tester.
Crank the engine for 15 seconds. Spark should be observed from the Spark Tester.
- If spark is not observed refer to Electronic Ignition (EI) System Diagnosis .

IMPORTANT: Additional DTCs may set when using the fuel pump output control.

Command the fuel pump ON and OFF. Fuel pump should energize when commanded ON and De-energize when commanded OFF
- If the fuel pump does not respond refer to Fuel System Diagnosis .
Turn OFF the ignition.
Install the CH-48027 Fuel Pressure Gage. Turn ON the ignition and command the fuel pump ON while observing the CH-48027 . Refer to Fuel Pressure Gage Installation and Removal . The fuel pressure should be between 384-425 kPa (55-61 psi).
- If the fuel pressure is not within 384-425 kPa (55-61 psi), refer to Fuel System Diagnosis .
Inspect for the following conditions:
- Compare the actual engine coolant temperature to the ECT parameter.
- Air filter and air intake system for restrictions and obstructions
- Test the fuel for contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
- Inspect the spark plugs. Refer to Spark Plug Inspection .
- Test the exhaust system for restrictions. Refer to Restricted Exhaust .
- Engine mechanical conditions such as worn timing chain gears, low compression, etc.-Refer to Engine Compression Test .