Visual Inspection Chart

VISUAL INSPECTION CHART

Mechanical	Electrical
Starter Motor Flywheel Ring Gear Engine Seized	Battery condition, state of charge Starter Motor Fuse 3 of the EMS fuse box High power protection module Starter relay Ignition switch Wiring harness(es) Damaged, loose or corroded connectors Body processor module (BPM) Engine Control Module (ECM)

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the concern is not visually evident, refer to the DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result in damage to the vehicle.

NOTE: When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.

NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PROBLEM SYMPTOM CHART

Symptom (general)	Symptom (specific)	Possible Source	Action
Non-Start	Engine does not crank	Engine siezed Battery and/or cables Inhibitor circuit Starter motor Starter relay Ignition switch ECM relay Body processor module	Check that the engine turns. Check the battery condition and state of charge. For starter motor and cable tests, GO to Pinpoint Test G222859p2 .
Non-Start	Engine cranks too fast/slow	Battery and/or cables Starter motor Cylinder compression	Check the battery condition and state of charge. For starter motor and cable tests, GO to Pinpoint Test G222859p2 . Check compressions.