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 operating correctly.

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	Battery Battery junction box (BJB) fuses: 23 (60A) 14 (15A) Smart junction box (SJB) fuses: 10 (30A) 22 (7.5A) - 3.0L and 3.5L vehicles only Wiring harness Starter relay (part of SJB) 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.

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 instrument cluster, refer to INSTRUMENT CLUSTER .
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	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B1342	ECU is Faulted	Instrument Cluster	CLEAR the DTCs. CARRY OUT the instrument cluster self-test. If DTC B1342 is retrieved, INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER .
B1600	PATS Key Transponder Signal is Not Received - Damaged Key or Non-PATS Key	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B1601	PATS Received Incorrect Key-Code From Ignition Key Transponder (Unprogrammed PATS Key)	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B1602	PATS Received Invalid Format of Key-Code From Ignition Key Transponder (Partial Key Read)	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B1681	PATS Transceiver Module Signal is Not Received (Damaged, Not Connected or Damaged Wiring)	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B2103	Defective Transceiver	Instrument Cluster	INSTALL a new PATS transceiver. REFER to ANTI-THEFT - PATS .
B2141	NVM Memory Failure (No Target ID Stored in Instrument Cluster)	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B2431	Transponder Programming Failed	Instrument Cluster	REFER to ANTI-THEFT - PATS .
B2477	Module Configuration Failure	Instrument Cluster	CONFIGURE the instrument cluster. REFER to MODULE CONFIGURATION . CLEAR the DTCs. REPEAT the self-test. If DTC B2477 is retrieved, INSTALL a new instrument cluster, REFER to INSTRUMENT CLUSTER .
U1900	CAN Communication BUS Fault	Instrument Cluster	DTCs B2141 and U2510 should be present along with U1900. REFER to ANTI-THEFT - PATS . If not, REFER to MULTIFUNCTION ELECTRONIC MODULES .
U2510	CAN - Invalid data for Vehicle Security	Instrument Cluster	REFER to ANTI-THEFT - PATS .
U2511	CAN - Data Mis-Match (Receive data does not match expected)	Instrument Cluster	REFER to ANTI-THEFT - PATS .