Inspection and Verification

WARNING: When servicing the starter motor or carrying out other underhood work in the vicinity of the starter motor, be aware that the heavy gauge battery input lead at the starter solenoid is "electrically hot" at all times. A protective cap or boot is provided over the terminal of this lead and must be installed after servicing. Failure to follow these instructions may result in personal injury.

WARNING: When working in the area of the starter motor, be careful to avoid touching hot exhaust components. Failure to follow these instructions may result in personal injury.

NOTE: When working on the starter system, make sure the anti-theft system is deactivated, if equipped.

Verify the customer concern by operating the starting system.

Visually inspect for obvious signs of mechanical and electrical damage. Refer to the following chart:

VISUAL INSPECTION CHART

Mechanical	Electrical
Starter motor Brackets	Battery Smart junction box (SJB) fuse: 21 (10A) Bussed electrical center (BEC) fuse: 4 (30A) Anti-theft system Damaged wiring harness 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.

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 , 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 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 .
- 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 Passive Anti-Theft System (PATS) Diagnostic Trouble Code (DTC) Chart. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
If no DTCs related to the concern are retrieved, go to Symptom Chart .

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

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