Starting System: Other Chevrolet Venture I

SYSTEM TESTS

Note. The following tests assume that engine and battery are operating normally and are at operating temperature, battery is charged, there are no engine problems that would cause a no-start condition, and no diagnostic trouble codes are present.

SLOW OR NO CRANK ONLY AFTER EXTENDED PERIODS OF VEHICLE NON-USE

There may be a parasitic load on electrical system. See PARASITIC LOAD EXPLANATION & TEST PROCEDURES article in GENERAL INFORMATION.

ENGINE DOES NOT CRANK, STARTER SOLENOID DOES NOT CLICK

1. Connect scan tool to Data Link Connector (DLC). See «COMPONENT LOCATIONS»(ref-8412-S24600093682000082800000). Turn ignition on. Select PCM DATA LIST. Observe COMMANDED STARTER parameter while turning ignition switch to START position. If scan tool displays ENABLED, go to next step. If scan tool does not display ENABLED, go to step 10.
2. Locate crank relay. Listen for a "click" from crank relay while turning ignition switch to START position. If a "click" sound is heard from crank relay while turning ignition switch to START position, go to step 7. If no "click" sound is heard from crank relay while turning ignition switch to START position, go to next step.
3. Turn ignition off. Disconnect crank relay. Turn ignition on. Connect test light between ground and crank relay coil feed circuit cavity No. 85 (Orange/Black wire). See «WIRING DIAGRAMS»(ref-8412-S08382231532000082800000). If test light illuminates, go to next step. If test light does not illuminate, go to step 5.
4. Connect test light between crank relay coil feed circuit cavity No. 85 (Orange/Black wire) and crank relay control circuit cavity No. 86 (Yellow/Black wire). Turn ignition switch to START position. If test light illuminates, go to step 15. If test light does not illuminate, go to step 12.
5. Turn ignition off. Locate and disconnect Park/Neutral Position (PNP) switch connector. See «COMPONENT LOCATIONS»(ref-8412-S24600093682000082800000). Connect test light between ground and PNP switch connector C1 terminal "G" (Pink wire). Turn ignition switch to START position. If test light illuminates, go to next step. If test light does not illuminate, repair open in PNP switch input circuit (Pink wire) between PNP switch connector C1 terminal "G" and PCM/ABS (10-amp) fuse located in instrument panel fuse block. Retest operation.
6. Connect a 10-amp fused jumper between PNP switch connector C1 terminals "G" (Pink wire) and "E" (Orange/Black wire). Connect test light between ground and crank relay coil feed circuit cavity No. 85 (Orange/Black wire). Turn ignition switch to START position. If test light illuminates, go to step 14. If test light does not illuminate, go to step 21.
7. Turn ignition off. Disconnect crank relay. Connect test light between ground and crank relay switch feed circuit cavity No. 30 (Red wire). See «WIRING DIAGRAMS»(ref-8412-S08382231532000082800000). If test light illuminates, go to next step. If test light does not illuminate, go to step 19.
8. Connect 30-amp fused jumper between crank relay switch feed circuit cavity No. 30 (Red wire) and crank relay switch output circuit cavity No. 87 (Purple wire). If engine cranks, go to step 15. If engine does not crank, go to next step.
9. If 30-amp fuse in jumper goes open, go to step 20. If 30-amp fuse in jumper does not go open, go to step 13.
10. Remove PCM/CRANK fuse, located in instrument panel fuse block. Using test light connected to ground, probe both PCM/CRANK fuse terminals inside instrument panel fuse block. If test light does not illuminate on either terminal, go to next step. If test light illuminates on one terminal, check for open or high resistance in Purple wire between Clear 80-pin PCM connector C2 terminal No. 23 and appropriate PCM/CRANK fuse terminal. (Scheme 2) See «WIRING DIAGRAMS»(ref-8412-S08382231532000082800000). Repair as necessary and retest operation. If Purple wire checks okay, go to step 12.
11. Gain access to Black 48-pin in-line harness connector C201, located near base of steering column. Connect test light (backprobe) between ground and Black 48-pin in-line harness connector C201 terminal D1 (Yellow wire). (Scheme 3) Turn ignition switch to START position. If test light does not illuminate, go to step 16. If test light illuminates, repair open in Yellow wire between Black 48-pin in-line harness connector C201 terminal D1 and appropriate PCM/CRANK fuse terminal. Retest operation.
12. Check for open or high resistance in Yellow/Black wire between crank relay control circuit cavity No. 86 and Clear 80-pin PCM connector C2 terminal No. 76. Repair as necessary and retest operation. If Yellow/Black wire checks okay, go to step 17.
13. Check for open or high resistance in supply voltage circuit to starter solenoid (Purple wire). Repair as necessary and retest operation. If Purple wire checks okay, go to step 18.
14. Check operation and adjustment of PNP switch. See appropriate AUTOMATIC TRANSMISSION SERVICING article in AUTOMATIC TRANSMISSIONS. Check for poor connection to PNP switch. Repair as necessary and retest operation. If PNP switch connection and adjustment are okay, go to step 22.
15. Check for poor connections at crank relay. Repair as necessary and retest operation. If crank relay connections are okay, go to step 23.
16. Check for poor connections at Black 48-pin in-line harness connector C201. Repair as necessary and retest operation. If Black 48-pin in-line harness connector C201 connections are okay, go to step 24.
17. Check for poor connection at Clear 80-pin PCM connector C2. Repair as necessary and retest operation. If PCM connection is okay, go to step 25.
18. Check for poor connections at starter solenoid. Repair as necessary and retest operation. If starter solenoid connections are okay, go to step 26.
19. Repair open or high resistance in Red wire between crank relay cavity No. 30 and fusible link "C" connected to starter solenoid (crank relay switch feed circuit). Retest operation.
20. Repair short to ground in Purple wire between crank relay cavity No. 87 and starter solenoid "S" terminal. Retest operation.
21. Repair open in Orange/Black wire between PNP switch connector C1 terminal "E" and crank relay coil input circuit cavity No. 85. Retest operation.
22. Replace PNP switch and retest operation. See appropriate AUTOMATIC TRANSMISSION SERVICING article in AUTOMATIC TRANSMISSIONS.
23. Replace crank relay and retest operation.
24. Replace ignition switch. See appropriate STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT. Retest operation.
25. Replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. Retest operation.
26. Replace starter assembly. See «STARTER»(ref-8412-S20000944892000082800000) under REMOVAL & INSTALLATION. Retest operation.

Scheme 2

Scheme 3

ENGINE DOES NOT CRANK, SOLENOID CLICKS

1. Inspect engine and drive belt system for mechanical binding. Repair as necessary. If engine moves freely, go to next step.
2. Check for high resistance in positive battery cable between battery and starter solenoid (Black wire). Repair as necessary and retest operation. If positive battery cable checks okay, go to next step.
3. Check for high resistance in ground circuit between battery and starter. Repair as necessary and retest operation. If ground circuit checks okay, go to next step.
4. Check for poor connections at starter solenoid. Repair as necessary and retest operation. If connections to starter solenoid check okay, go to next step.
5. Replace starter. See «STARTER»(ref-8412-S20000944892000082800000) under REMOVAL & INSTALLATION. Retest operation.

PINION CLEARANCE CHECK

Note. Pinion clearance is not adjustable. If clearance is not within specification, replace starter assembly.

1. Secure starter motor in vise with opening in housing accessible for measurement. Disconnect starter field connector from solenoid terminal "M". Insulate starter field connector. Connect battery negative terminal lead to starter frame. Connect 12 volts to starter solenoid terminal "S". Momentarily touch jumper lead from starter solenoid terminal "M" to starter frame, shifting pinion into cranking position. (Scheme 4)
2. Push pinion as far as possible away from retainer. Using a feeler gauge, ensure there is.01-.16" (.25-4.06 mm) clearance between pinion and retainer. (Scheme 5)

Scheme 4

Scheme 5