Starting System: Diagnosis — Starting System — Starter

Inspection and Verification

WARNING

Always disconnect the battery ground cable at the battery before disconnecting the starter motor battery terminal lead. If a tool is shorted at the starter motor battery terminal, the tool can quickly heat enough to cause a skin burn. Failure to follow this instruction may result in serious personal injury.

Note. The anti-theft system must be functioning correctly before a logical starting system diagnosis can be carried out. Address anti-theft system concerns before continuing. Refer to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) .

Verify the customer concern by operating the starting system to duplicate the conditions.
Remove the accessory drive belt. Refer to «ACCESSORY DRIVE»(ref-356599) . Verify the crankshaft and each of the components driven by the accessory drive belt rotate and are not seized or damaged.
Inspect to determine if any of the following mechanical or electrical concerns apply. VISUAL INSPECTION TABLE Mechanical Electrical Starter motor Starter motor bolts Flexplate Battery Open fuse Battery Junction Box (BJB) fuse 10 (30A) Damaged wiring harness Starter relay Anti-theft system Loose or corroded connections
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 cause is not visually evident, connect the scan tool to the Data Link Connector (DLC). NOTE: Make sure to use the latest scan tool software release.
If the scan tool does not communicate with the VCM : check the VCM connection to the vehicle. check the scan tool connection to the VCM . refer to «MODULE COMMUNICATIONS NETWORK»(ref-356606) , No Power To The Scan Tool, to diagnose no power to the VCM . NOTE: The Vehicle Communication Module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM .
If the scan tool does not communicate with the vehicle: verify the ignition is ON. The air bag warning indicator prove-out (other indicators may NOT prove ignition is ON) confirms ignition ON. If ignition does not turn ON, refer to «STEERING COLUMN SWITCHES»(ref-356610) to diagnose no power in RUN. refer to «MODULE COMMUNICATIONS NETWORK»(ref-356606) Inspection and Verification to establish a scan tool session (without the ignition ON). verify the scan tool operation with a known good vehicle.
Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(ref-356606) . If the network test passes, retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Carry out the self-test diagnostics for the PCM.
Turn the ignition OFF. The ignition must be OFF to perform a RFA module self-test.
Carry out the self-test diagnostics for the RFA module (disregard RFA DTC B10D7:31 if 2 Intelligent Access (IA) keys are not in the vehicle during on-demand self test).
If the DTCs retrieved are related to the concern, GO to the PCM DTC Table or GO to RFA Remote Function Actuator (RFA) module DTC Table (Vehicles With a Push-Button Start System). If no DTCs related to the concern are retrieved, GO to «SYMPTOM TABLE»(ref-356636-S01027500782010022500000) .

DTC Tables

Note. Refer to Description and Operation, Intelligent Access with Push Button Start in ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) , to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON, ignition START).

PCM DTC Table

DTC	Description	Action
P0512	Starter Request Circuit - Circuit has Power With the Ignition in the OFF Position	Go To PINPOINT TEST C .
P1260	Theft Detected, Vehicle Immobilized	REFER to the DTC Table in ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) .
All other DTCs		REFER to the Master DTC Table in MULTIFUNCTION ELECTRONIC MODULES .

PCM DTC TABLE

Remote Function Actuator (RFA) Module DTC Table

Note. This module utilizes a 5-character DTC followed by a 2-character failure type code. The failure type code provides information about specific fault conditions such as opens or shorts to ground. CMDTCs have an additional 2-character DTC status code suffix to assist in determining DTC history.

DTC	Description	Action
P0615:11	Start Relay Circuit: Short to Ground	Go To PINPOINT TEST E .
P0615:12	Start Relay Circuit: Short to Battery	Go To PINPOINT TEST E .
P0615:13	Start Relay Circuit: Circuit Open	Go To PINPOINT TEST E .
All other DTCs		REFER to the DTC Table in MULTIFUNCTION ELECTRONIC MODULES .

DTC DESCRIPTION TABLE