Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Inspect for the following conditions:
- Fuel smell or leak-Refer to Fuel Leaks .
- A plugged air filter collapsed air intake duct-Refer to Air Cleaner Element Replacement .
- A restricted exhaust system-Refer to Symptoms - Engine Exhaust .
- Contaminants in fuel-Refer to Contaminants-in-Fuel Diagnosis .
- Observe that the Ignition 1 signal parameter is B+.
- If the ignition 1 signal is not B+ test the ignition 1 voltage circuit of the ECM for a short to ground, high resistance an open, or a faulty ECM.
- With the ignition ON and the engine OFF observe that the Actual Fuel Rail Pressure parameter is 1.2-1.9 MPa.
- If the Actual Fuel Rail Pressure parameter is not 1.2-1.9 MPa, refer to DTC P0191 - P0193 .
- Crank the engine for 15 seconds.
- If the Actual Fuel Rail Pressure parameter is less than 10 MPa while cranking the engine, refer to Fuel System Diagnosis .
- Perform the Engine Compression Test. Refer to Engine Compression Test
.
- If any fuel vapor was emitted during the engine compression test, replace the affected fuel injector. Refer to Fuel Injector Replacement (Left) or Fuel Injector Replacement (Right) .
- If no fuel vapor was emitted during the compression test and the compression tested normal refer to Fuel System Diagnosis - High Pressure Side
IMPORTANT: During the replacement of the injectors, inspect the inlet and outlet fittings for corrosion or contamination. Refer to Contaminants-in-Fuel Diagnosis .