Engine Cranks But Does Not Run. Saturn L300/LW300 2005

For 1990-2009 cars only

Makes 🢒 Saturn 🢒 2005 🢒 L300/LW300 🢒 Engine 🢒 Engine Electrical 🢒 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. 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.

•	The engine cranking speed is acceptable.

•	There is adequate fuel in the fuel tank.

Step

Action

Value(s)

Yes

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Does the scan tool display any U-XXX DTCs ?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

Go to Step 3

Turn ON the ignition, with the engine OFF.
Observe the DTC Information with a scan tool.

Does the scan tool display DTCs P0102, P0103, P0201-P0206, P0335, P601, P0602, P0603, P0604, P0606, P0628, P0629, P1630, P1631, P1632?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

Go to Step 4

Does the scan tool display any body control module (BCM) vehicle theft deterrent (VTD) DTCs?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

Go to Step 5

Turn ON the ignition with the engine OFF.
Probe the BCM/ECM/Cruise fuse with a test lamp that is connected to a good ground.

Does the test lamp illuminate on at least one side of the fuse?

Go to Step 6

Go to Step 7

With the ignition switch in the CRANK position, probe the BCM/ECM/Cruise fuse with a test lamp that is connected to a good ground.

Does the test lamp illuminate on at least one side of the fuse while cranking the engine?

Go to Step 9

Go to Step 8

Caution: Refer to Battery Disconnect Caution in the Preface section.

Turn the ignition OFF.
Remove the battery feed wire from the fuse block.
Push in the tabs at the end of the fuse block case. Roll back the fuse block to gain access to the fuse block connectors.
Jumper the battery feed to the fuse block. Turn ON the ignition with the engine OFF.
Probe the ignition 1 voltage circuit at the underhood fuse block connector C3 E9 with a test lamp that is connected to a good ground. Refer to Power and Grounding Connector End Views in Wiring Systems.

Does the test lamp illuminate?

Go to Step 14

Go to Step 13

Caution: Refer to Battery Disconnect Caution in the Preface section.

Turn OFF the ignition.
Remove the battery feed wire from the fuse block.
Push in the tabs at the end of the fuse block case. Roll back the fuse block to gain access to the fuse block connectors.
Jumper the battery feed to the fuse block.
With the ignition switch in the crank position, probe the ignition 1 voltage circuit at the underhood fuse block connector C3 E9 with a test lamp that is connected to a good ground. Refer to Power and Grounding Connector End Views in Wiring Systems.

Does the test lamp illuminate while cranking the engine?

Go to Step 14

Go to Step 13

Command the fuel pump ON with a scan tool.

Does the fuel pump operate?

Go to Step 10

Go to Fuel Pump Electrical Circuit Diagnosis

Turn OFF the ignition.
Remove both ignition control modules, keeping the ignition control module assembly connected to the harness connector. Refer to Ignition Control Module Replacement - Bank 1 and Ignition Control Module Replacement - Bank 2 .
Install a J 26792 (SA9199Z) Spark Tester on the #1 spark plug boot. Ensure the clamp end of the spark tester is connected to a good engine ground.
Perform the ignition coil cylinder 1 test with a scan tool.
Repeat steps 3 and 4 for the remaining cylinders

Does the spark tester spark on all cylinders?

Go to Step 11

Go to Electronic Ignition (EI) System Diagnosis

Turn OFF the ignition.
Install a SA9127E Gage Bar Set. Refer to Fuel Pressure Gage Installation and Removal .
Turn ON the ignition, with the engine OFF.
Command the fuel pump ON with a scan tool.

Is the fuel pressure within the specified range while the fuel pump is operating?

268-338 kPa (39-49 psi)

Go to Step 12

Go to Fuel System Diagnosis

Inspect for the following conditions:

•	A collapsed air intake duct

•	A restricted air filter element--Refer to Air Cleaner Assembly Replacement .

•	The spark plugs for being gas or coolant fouled--Refer to Spark Plug Inspection . If the spark plugs are fouled, determine what caused the condition.

•	Any engine mechanical conditions, worn timing chain and gears, or low compression--Refer to Engine Compression Test in Engine Mechanical.

•	A restricted exhaust system--Refer to Restricted Exhaust in Engine Exhaust.

•	An engine coolant temperature (ECT) sensor that has shifted in value--Refer to Temperature Versus Resistance .

Did you complete the action?

Go to Step 18

Test the affected circuit between the underhood fuse block and the ignition switch for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 15

Test for an intermittent and for a poor connection at the underhood block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

Test for an intermittent and for a poor connection at the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 17

Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.