Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Starting and Charging Schematics | |||
1 | Did you perform the Vehicle Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Turn the ignition switch to the START position. Does the engine crank? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 | Turn the ignition switch to the START position. Does the starter relay click? | Go to Step 9 | Go to Step 4 |
4 |
Does the scan tool display that the Crank Request Signal parameter is Yes? | Go to Step 5 | Go to Step 12 |
5 |
Does the test light illuminate? | Go to Step 22 | Go to Step 6 |
6 |
Does the test light illuminate? | Go to Step 7 | Go to Step 18 |
7 |
Does the test light illuminate? | Go to Step 8 | Go to Step 16 |
8 |
Does the starter motor crank? | Go to Step 23 | Go to Step 17 |
9 |
Does the test lamp illuminate? | Go to Step 10 | Go to Step 19 |
10 | Connect a 10-amp fused jumper between the battery positive voltage circuit and the starter solenoid crank voltage circuit of the starter relay. Does the engine crank? | Go to Step 22 | Go to Step 11 |
11 | Does the fuse in the jumper open? | Go to Step 21 | Go to Step 20 |
12 |
Does the test lamp illuminate? | Go to Step 27 | Go to Step 13 |
13 | Connect a test lamp between the battery positive voltage circuit of the ignition switch and a good ground. Does the test lamp illuminate? | Go to Step 14 | Go to Step 15 |
14 | Test the Off/Run/Crank voltage circuit of the ignition switch for an open, a high resistance and a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 34 | Go to Step 25 |
15 | Repair the battery positive voltage circuit of the ignition switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
16 | Repair the ignition 1 voltage circuit of the PNP switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
17 | Repair the starter relay coil supply voltage circuit of the PNP switch. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
18 | Test the starter relay coil control circuit of the starter relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 34 | Go to Step 24 |
19 | Repair the battery positive voltage circuit of the starter relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 34 | -- |
20 | Test the starter solenoid crank voltage circuit of the starter relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 34 | Go to Step 26 |
21 | Test the starter solenoid crank voltage circuit of the starter relay for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 34 | Go to Step 26 |
22 | Inspect for poor connections at the starter relay. 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 34 | Go to Step 28 |
23 | Inspect for poor connections at the harness connector of the PNP. 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 34 | Go to Step 29 |
24 | Inspect for poor connections at the harness connector of the powertrain control module (PCM). 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 34 | Go to Step 30 |
25 | Inspect for poor connections at the harness connector of the ignition switch harness connector. 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 34 | Go to Step 31 |
26 | Inspect for poor connections at the harness connector of 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 34 | Go to Step 32 |
27 | Inspect for poor connections at the harness connector of the body control module (BCM). 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 34 | Go to Step 33 |
28 | Replace the starter relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 34 | -- |
29 | Replace the PNP switch. Refer to Park/Neutral Position Switch Replacement in Automatic Transmission - 4T40-E/4T45-E. Did you complete the replacement? | Go to Step 34 | -- |
30 |
Important: The replacement PCM must be programmed. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 2.2 (L61) or Powertrain Control Module Replacement in Engine Controls - 3.5L (LX9). Did you complete the replacement? | Go to Step 34 | -- |
31 | Replace the ignition switch. Refer to Ignition Switch Lock Cylinder Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement? | Go to Step 34 | -- |
32 | Replace the starter. Refer to Starter Motor Replacement . Did you complete the replacement? | Go to Step 34 | -- |
33 |
Important: The replacement BCM must be programmed. Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems. Did you complete the replacement? | Go to Step 34 | -- |
34 | Operate the system for which the symptom occurred. Did you correct the condition? | System OK | Go to Step 2 |
