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 Starter motor bolts Flexplate Flywheel Battery Battery junction box (BJB) fuse(s): 2 (60A) 14 (15A) Smart junction box (SJB) fuse(s): 10 (30A) 22 (7.5A) - 3.0L and 3.5L vehicles only Wiring harness Starter motor relay - non-serviceable (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.
- 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-291879) 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»(ref-291879) article 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-291879) article. If the network test passes, retrieve and record continuous memory DTCs.
- 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 or the Passive Anti-Theft System (PATS) DTC Chart. For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-291878) article.
- If no DTCs related to the concern are retrieved, go to «Symptom Chart»(ref-291901-S31935607282008073000000) .
| DTC | Description | Source | Action |
|---|---|---|---|
| P0512 | Starter Request Circuit - Circuit has Power With the Ignition in the OFF Position | PCM | CARRY OUT the Ignition Switch Component Test. Refer to 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 Circuit Failure | PCM | Refer to the appropriate Automatic Transmission article for the procedure. |
| P0707 | TR circuit low input | PCM | Refer to the appropriate Automatic Transmission article for the procedure. |
| P0708 | TR circuit high input | PCM | Refer to the appropriate Automatic Transmission article for the procedure. |
| P0704 | Clutch switch input circuit | PCM | REFER to Introduction - Gasoline Engines article. |
| P0830 | Clutch Pedal Switch A Circuit | PCM | REFER to Introduction - Gasoline Engines article. |
| P0833 | Clutch Pedal Switch B Circuit | PCM | REFER to Introduction - Gasoline Engines article. |
PCM DTC CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| B1213 | Anti-Theft Number of Programmed Keys is Below Minimum | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| 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 (IC), MESSAGE CENTER, AND WARNING CHIMES article. |
| B1600 | PATS Key Transponder Signal is Not Received - Damaged Key or Non-PATS Key | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B1601 | PATS Received Incorrect Key-Code From Ignition Key Transponder (Unprogrammed PATS Key) | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B1602 | PATS Received Invalid Format of Key-Code From Ignition Key Transponder (Partial Key Read) | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B1681 | PATS Transceiver Module Signal is Not Received (Damaged, Not Connected or Damaged Wiring) | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B2103 | Defective Transceiver | Instrument Cluster | INSTALL a new PATS transceiver. REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B2141 | NVM Memory Failure (No Target ID Stored in Instrument Cluster) | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| B2431 | Transponder Programming Failed | Instrument Cluster | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
PASSIVE ANTI-THEFT SYSTEM (PATS) - DTC CHART
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| The engine does not crank | Battery Battery junction box (BJB) fuse(s): 2 (60A) 14 (15A) Smart junction box (SJB) fuse(s): 10 (30A) 22 (7.5A) - 3.0L and 3.5L vehicles Starter motor PCM Circuitry Starter motor relay - non-serviceable (part of SJB) Ignition switch Anti-theft system Start diode Transmission range (TR) sensor - automatic transmission Clutch cutoff switch - manual transmission | 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/flexplate ring gear teeth | INSPECT the flywheel/flexplate 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 article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Starting System for schematic and connector information.
Pinpoint Test B: One-Touch Integrated Start (OTIS) Does Not Operate Correctly
Refer to SYSTEM WIRING DIAGRAMS article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Starting System for schematic and connector information.
Pinpoint Test C: Unusual Starter Noise
This pinpoint test is intended to diagnose the following
- Starter motor mounting
- Starter motor mounting bolts
- Starter motor drive
- Flywheel or flexplate ring gear
- Starter motor
- 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 - 2.3L»(ref-291901-S09314276032008073000000) , «Starter Motor - 3.0L»(ref-291901-S16052701762008073000000) or «Starter Motor - 3.5L»(ref-291901-S42180690122008073000000) . TEST the system for normal operation.
- C2 CHECK FOR ENGINE NOISE Turn the ignition switch to the OFF position. Connect a fused jumper wire from the B-terminal to the S-terminal of the starter motor. Engage the starter motor and verify that 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-291856) article to continue the diagnosis.
- C3 CHECK FOR UNUSUAL WEAR Remove the starter motor. Refer to «Starter Motor - 2.3L»(ref-291901-S09314276032008073000000) , «Starter Motor - 3.0L»(ref-291901-S16052701762008073000000) or «Starter Motor - 3.5L»(ref-291901-S42180690122008073000000) . Inspect the ring gear for damaged or worn teeth. Is the noise due to flexplate/flywheel ring gear tooth damage? YES : INSTALL a new flexplate/flywheel ring gear. EXAMINE the starter pinion teeth. If damaged, INSTALL a new starter motor. REFER to «Starter Motor - 2.3L»(ref-291901-S09314276032008073000000) , «Starter Motor - 3.0L»(ref-291901-S16052701762008073000000) or «Starter Motor - 3.5L»(ref-291901-S42180690122008073000000) . TEST the system for normal operation. NO : INSTALL a new starter motor. REFER to «Starter Motor - 2.3L»(ref-291901-S09314276032008073000000) , «Starter Motor - 3.0L»(ref-291901-S16052701762008073000000) or «Starter Motor - 3.5L»(ref-291901-S42180690122008073000000) . TEST the system for normal operation.