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: When working on the starter system, make sure the anti-theft system is operational.

Verify the customer concern by operating the starting system to duplicate the conditions.

Inspect to determine if any of the following mechanical or electrical concerns apply.

VISUAL INSPECTION CHART

Mechanical	Electrical
Starter motor Brackets	Battery Bussed electrical center (BEC) fuses: 4 (30A) 64 (20A) Smart junction box (SJB) fuse: 21 (10A) Wiring harness Starter relay Anti-theft system Loose or corroded connections

If the inspection reveals an obvious concern that can be readily identified, repair it as necessary.

NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the data link connector (DLC).

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 VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to MODULE COMMUNICATIONS NETWORK article, No power to the scan tool, to diagnose no communication with the scan tool.
If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).
Clear the continuous DTCs and carry out the self-test diagnostics for the powertrain control module (PCM).
If the DTCs retrieved are related to the concern, go to Starter and Passive Anti-Theft System (PATS)Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
If no DTCs related to the concern are retrieved, go to Symptom Chart .

PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Source	Action
B1213	Anti-Theft Number Of Programmed Keys Is Below Minimum	PCM	REFER to ANTI-THEFT - PATS article.
B1342	ECU is Defective	PCM	CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS article. CLEAR the DTCs. REPEAT the self-test.
B1600	Passive Anti-Theft System (PATS) Key Transponder Is Not Received - Damaged Key Or Non-PATS Key	PCM	REFER to ANTI-THEFT - PATS article.
B1601	Passive Anti-Theft System (PATS) Received Incorrect Key-Code From Key Transponder (Unprogrammed PATS Key)	PCM	REFER to ANTI-THEFT - PATS article.
B1602 or B2431	Passive Anti-Theft System (PATS) Received Invalid Format Of Key-Code From Key Transponder (Partial Key Read)	PCM	REFER to ANTI-THEFT - PATS article.
B1681	Passive Anti-Theft System (PATS) Transceiver Module Signal Is Not Received (Damaged, Not Connected Or Damaged Wiring)	PCM	REFER to ANTI-THEFT - PATS article.
B2103	Internal Transceiver Antenna Damaged	PCM	REFER to ANTI-THEFT - PATS article.
P1260	PCM Disabled - Vehicle Disabled	PCM	REPAIR the PCM. REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.