GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Cavalier (CNG) 🢒 Engine 🢒 Engine Controls - 2.2L (LN2) 🢒 Engine Cranks But Does Not Run

Description

The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start on either fuel system. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis.

The Engine Cranks but Does Not Run diagnostic table assumes the following:

    • The battery is completely charged. Refer to Battery Inspection/Test in Engine Electrical in the J Platform Service Manual.
    • The engine cranking speed is within specifications. Refer to Engine Cranks Slowly in Engine Electrical in the J Platform Service Manual.
    • There is adequate fuel in both of the fuel tanks.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check Alternative Fuels - Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Alternative Fuels (Engine Controls)

2
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the Diagnostic Trouble Code (DTC) Information from the following control modules with a scan tool:
    3. • Alternative Fuels ECM
    • PCM

Does the scan tool display DTCs P0336, P0601, P0602, P1202, P1621, P1626, P1630, P1631 or P1632?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3

Observe the engine speed with a scan tool while you crank the engine.

Does the scan tool indicate engine speed while the engine is cranking?

Go to Step 4

Go to Electronic Ignition (EI) System Diagnosis

4
  1. Turn OFF the ignition.
  2. Disconnect a spark plug wire from a spark plug.
  3. Install the J 26792 Spark Tester to the spark plug wire.
  4. Attempt to start the engine.

Does the spark tester spark and is the spark consistent?

Go to Step 5

Go to Electronic Ignition (EI) System Diagnosis

5

Does the scan tool display DTC P1215?

Go to Alternative Fuel (AF) Fuel Pump Relay Diagnosis

Go to Step 6

6

Inspect for the following conditions:

    • Collapsed air intake duct
    • Restricted air filter element--Refer to Air Cleaner Element Replacement in Engine Controls 2-2L in the J Platform Service Manual.
    • Spark plugs for being gas or coolant fouled. Refer to Spark Plug Inspection in Engine Controls 2-2L in the J Platform Service Manual. If the spark plugs are fouled, determine what caused the condition.
    • Engine mechanical condition, for example, broken timing chain, low compression. Refer to Symptoms - Engine Mechanical in Engine Mechanical-2.2L in the J Platform Service Manual.
    • Restricted exhaust system. Refer to Restricted Exhaust in Engine Exhaust in the J Platform Service Manual.
    • The engine coolant temperature (ECT) sensor is not close to the actual engine temperature. Refer to Temperature Versus Resistance in Engine Controls 2-2L in the J Platform Service Manual.
    • Compare MAP parameter to another vehicle. The parameters should be close in value. Refer to DTC P0106 .
    • TP sensor for being stuck in range.

Did you find and correct the condition?

Go to Step 7

Go to Intermittent Conditions

7
  1. With a scan tool, clear the DTCs.
  2. Attempt to start the engine.

Does the engine start and continue to operate?

Go to Step 8

Go to Step 2

8
  1. Idle the engine.
  2. Allow the engine to reach operating temperature.
  3. With a scan tool, observe the DTC information.

Are any DTCs displayed?

Go to Diagnostic Trouble Code (DTC) List

System OK