Circuit/System Verification

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This diagnostic assumes the following:

The battery is completely charged. Refer to Battery Inspection/Test .
The engine cranking speed is acceptable. Refer to Engine Cranks Slowly .
There is adequate fuel in the fuel tank.

Engine cranking for 15 seconds, observe the DTC information with a scan tool. Verify that DTC P0117, P0118, P0122, P0123, P0222, P0223, P0335, P0336, P0513, P0562, P0563, P0601, P0602, P0603, P0604, P0606, P062F, P0633, P0685, P0689, P0690, P1516, P1631, P1682, P16F3, P2101, P2119, or P2610 is not set.
- If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition ON, observe the Theft Deterrent LED located in the DIC/Clock. The LED should be OFF.
- If the LED is ON, or blinking, refer to Symptoms - Theft Deterrent .
Engine cranking, observe the scan tool Engine Speed parameter. The scan tool should indicate an engine speed greater than 0 RPM.
- If the engine speed is 0 RPM, refer to DTC P0335 or P0336 for further diagnosis.

NOTE: It may be necessary to secure the J 36012-A to the spark plug boots with electrical tape.

Install the J 36012-A to the spark plug boots.
Connect the J 26792 between the boot of a spark plug wire and ground.
Connect the remaining wires to the appropriate cylinders.

NOTE: An erratic or weak spark is considered a no spark condition.

Engine cranking, verify the spark tester sparks.
- If there is no spark, refer to Electronic Ignition System Diagnosis .
Ignition ON, command the fuel pump ON with a scan tool. You should hear the fuel pump turn ON.
- If the fuel pump does not turn ON, refer to Fuel Pump Electrical Circuit Diagnosis .
Ignition OFF, disconnect the harness connector at a fuel injector.
Connect a J 34730-405 between the control circuit and the ignition voltage circuit. Engine cranking, the injector test lamp should flash.
- If the injector test lamp does not flash, refer to DTC P0201, P0202, P0203, or P0204 .
Ignition OFF, install the CH-48027 . Refer to FUEL PRESSURE GAUGE INSTALLATION AND REMOVAL .

NOTE:

The fuel pump may need to be commanded ON a few times, in order to obtain the highest possible fuel pressure.
Do NOT start the engine for this test.

Ignition ON, command the fuel pump ON with a scan tool. The fuel pressure should be between 365-414 kPa (53-60 psi).
- If not within the specified range, refer to Fuel System Diagnosis .
Verify the following conditions do not exist:
- Collapsed air intake duct to the throttle body
- Restricted air filter element
- Spark plugs for being gas or coolant fouled
- A skewed manifold absolute pressure (MAP) sensor-Refer to DTC P0106 .
- A skewed engine coolant temperature (ECT) sensor-Refer to DTC P0116 .
- Exhaust system restricted-Refer to Restricted Exhaust .
- Fuel contamination-Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
- Engine mechanical condition, for example, worn timing belt or low compression-Refer to Symptoms - Engine Mechanical or Timing Belt Replacement .
- If you find any of the above conditions, repair as necessary.