GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Starting and Charging Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Engine Electrical Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Engine Electrical

2

Turn the ignition to the Start position.

Is the Theft indicator flashing?

Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent

Go to Step 3

3

Turn the ignition to the Start position.

Does the starter solenoid click?

Go to Starter Solenoid Clicks, Engine Does Not Crank

Go to Step 4

4

Does the vehicle have an automatic transmission?

Go to Step 5

Go to Step 8

5

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Place the transmission in Park or Neutral.
  4. With a scan tool, observe the TR Sw. parameter in the transmission data list.

Does the scan tool display Park or Neutral?

Go to Step 6

Go to Range Selector Displays Incorrect Range in Automatic Transaxle -5AT or Range Selector Displays Incorrect Range in Automatic Transmission -VT25-E

6

  1. Disconnect the transmission range switch.
  2. Connect a test lamp between the crank voltage circuit of the transmission range switch harness connector and ground.
  3. Turn the ignition to the Start position.

Does the test lamp illuminate?

Go to Step 7

Go to Step 10

7

    Important: You must use 10 AWG wire for the fused jumper. Any smaller wire will cause too high of a resistance and a misdiagnosis will occur.

  1. Connect a 15 A fused jumper wire between the crank voltage circuit of the transmission range switch and the starter solenoid crank voltage circuit of the transmission range switch.
  2. Turn the ignition to the Start position.

Does the engine Crank?

Go to Step 13

Go to Step 11

8

    Important: Place the transmission in neutral and set the parking brake.

  1. Disconnect the clutch pedal position (CCP) switch.
  2. Connect a test lamp between the crank voltage circuit of the CCP switch harness connector and ground.
  3. Turn the ignition to the Start position.

Does the test lamp illuminate?

Go to Step 9

Go to Step 10

9

    Important: You must use 10 AWG wire for the fused jumper. Any smaller wire will cause too high of a resistance and a misdiagnosis will occur.

  1. Connect a 15 A fused jumper wire between the crank voltage circuit of the CCP switch and the starter solenoid crank voltage circuit of the CCP switch.
  2. Turn the ignition to the Start position.

Does the engine Crank?

Go to Step 14

Go to Step 11

10

Test the crank voltage circuit of the transmission range switch or CCP switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 12

11

Test the starter solenoid crank voltage circuit for a short, high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 20

Go to Step 15

12

Inspect for poor connections 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 20

Go to Step 16

13

Inspect for poor connections at the transmission range 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 20

Go to Step 17

14

Inspect for poor connections at the CCP 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 20

Go to Step 18

15

Inspect for poor connections at the starter solenoid. 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 20

Go to Step 19

16

Replace the Ignition Switch. Refer to Ignition and Start Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 20

--

17

Replace the transmission range switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transaxle -5AT or Park/Neutral Position Switch Replacement in Automatic Transmission -VT25-E.

Did you complete the replacement?

Go to Step 20

--

18

Replace the CCP switch. Refer to Clutch Pedal Position Switch Replacement in Clutch.

Did you complete the replacement?

Go to Step 20

--

19

Replace the Starter Motor. Refer to Starter Motor Replacement .

Did you complete the replacement?

Go to Step 20

--

20

Operate the system for which the symptom occurred.

Is the symptom still present?

Go to Step 2

System OK