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 - PATS - HYBRID .
- Verify the customer concern by operating the starting system to duplicate the conditions.
- Remove the accessory drive belt. Refer to «ACCESSORY DRIVE - 2.5L»(ref-344110) for 2.5L engines or «ACCESSORY DRIVE - 3.0L (4V)»(ref-344111) for 3.0L (4V) engines. 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 CHART Mechanical Electrical Starter motor Starter motor bolts Flexplate Flywheel Battery Battery Junction Box (BJB) fuses: 11 (30A) 125 A MIDI Smart Junction Box (SJB) fuse 27 (20A) 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).
- 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-344076) , No Power To The Scan Tool, to diagnose no power to 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»(ref-344076) to diagnose no response from the PCM.
- Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(ref-344076) . If the network test passes, retrieve and record CMDTCs.
- Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
- If the DTCs retrieved are related to the concern, go to «PCM DTC CHART»(ref-344115-S17579104562009101600000) . For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-344077) .
- If no DTCs related to the concern are retrieved, GO to «SYMPTOM CHART»(ref-344115-S39943101892009101600000) .
PCM DTC Chart
| DTC | Description | Action |
|---|---|---|
| P0512 | Starter Request Circuit - Circuit has Power With the Ignition in the OFF Position | CARRY OUT the Ignition Switch Component Test. Refer to SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER for component testing. If necessary, INSTALL a new ignition switch. If the ignition switch passed the component test, REPAIR circuit CDC35 (BU/WH) for a short to power. |
| P0706 | TR sensor A circuit range/performance | |
| P0707 | TR sensor A circuit low | |
| P0708 | TR sensor A circuit high | |
| P1260 | Theft detected, vehicle immobilized | REFER to the DTC Chart in ANTI-THEFT - PATS - HYBRID . |
| P1702 | TR sensor A circuit failure | |
| P1705 | TR Not indicating PARK/NEUTRAL during Self-Test |
PCM DTC CHART
Symptom Chart
Note. For hybrid starting system diagnostics, refer to the INTRODUCTION - GASOLINE MODELS .
| Condition | Possible Sources | Action |
|---|---|---|
| The engine does not crank | Battery Fuse(s) Starter motor Circuitry PCM Starter motor relay Anti-theft system Ignition switch Start diode Clutch cutoff switch Transmission Range (TR) sensor | GO to PINPOINT TEST A . |
| One-Touch Integrated Start (OTIS) does not operate correctly | Circuitry PCM | GO to PINPOINT TEST B . |
| The engine cranks slowly | Battery Starter motor Circuitry | CARRY OUT the Starter Motor Component Test. |
| Unusual starter noise | Starter motor mounting Starter motor Incorrect starter drive engagement | GO to PINPOINT TEST C . |
| The starter spins but the engine does not crank | Starter motor | INSPECT the starter motor mounting and engagement. REPAIR as necessary. |
| Damaged flywheel/ring gear teeth | INSPECT the flywheel/ring gear for damaged, missing or worn teeth. REPAIR as necessary. |
SYMPTOM CHART
Pinpoint Test A: The Engine Does Not Crank
Refer to SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER , Starting System for schematic and connector information .
Pinpoint Test B: One-Touch Integrated Start (OTIS) Does Not Operate Correctly
Refer to SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER , Starting System for schematic and connector information.
Pinpoint Test C: Unusual Starter Noise
This pinpoint test is intended to diagnose the following
- Loose starter motor mounting bolts or brackets
- Worn or damaged flexplate or flywheel ring gear
- Worn or damaged starter motor drive gear
Scheme 18
- C1 CHECK THE STARTER MOUNTING Inspect the starter motor mounting bolts for looseness. Is the starter motor mounted correctly? Yes: GO to C2 . No: INSTALL the starter motor correctly. REFER to «STARTER MOTOR - 2.5L»(ref-344115-S10365805232009101600000) or «STARTER MOTOR - 3.0L»(ref-344115-S34452857682009101600000) . TEST the system for normal operation.
- C2 CHECK FOR ENGINE NOISE Ignition OFF. Connect a remote starter switch between the starter solenoid B-and S-terminals. Engage the starter motor and verify the noise is due to the starter operation. Is the noise due to the starter motor engagement? Yes: GO to C3 . No: REFER to «ENGINE SYSTEM-GENERAL INFORMATION»(ref-344060) to continue diagnosis.
- C3 CHECK FOR UNUSUAL WEAR Remove the starter motor. Refer to «STARTER MOTOR - 2.5L»(ref-344115-S10365805232009101600000) or «STARTER MOTOR - 3.0L»(ref-344115-S34452857682009101600000) . Inspect the ring gear for damaged or worn teeth. Is the noise due to flexplate or flywheel ring gear tooth damage? Yes: INSTALL a new flexplate or flywheel. EXAMINE the starter pinion teeth. If damaged, INSTALL a new starter motor. REFER to «STARTER MOTOR - 2.5L»(ref-344115-S10365805232009101600000) or «STARTER MOTOR - 3.0L»(ref-344115-S34452857682009101600000) . TEST the system for normal operation. No: INSTALL a new starter motor. REFER to «STARTER MOTOR - 2.5L»(ref-344115-S10365805232009101600000) or «STARTER MOTOR - 3.0L»(ref-344115-S34452857682009101600000) . TEST the system for normal operation.