CHEROKEE 2.5L & WRANGLER 2.5L
Note. For additional trouble shooting, see TROUBLE SHOOTING article in GENERAL INFORMATION.
Starter motor shims can be added or removed to correct starter noise. Shim thickness is .015" (.381 mm). Shims may be stacked if additional thickness is necessary. Identify symptom and repair as necessary.
High Frequency Whine Before Engine Starts; Engine Starts Okay
Probable cause is excessive distance between pinion gear and flywheel/drive plate gear. To repair, move starter motor toward flywheel/drive plate by removing starter shim(s), if possible.
High Frequency Whine After Engine Starts With Ignition Key Released; Engine Starts Okay
Probable cause is insufficient distance between pinion gear and flywheel/drive plate gear. Noise may be intermittent. To repair, move starter motor away from flywheel/drive plate by adding starter shim(s). Inspect for damage, excessive wear and excessive runout. Replace flywheel/drive plate as necessary.
CIRCUIT RESISTANCE TESTS
Note. If excessive resistance is not found in circuits being tested, remove starter and proceed to BENCH TESTING .
Note. A voltmeter accurate to one tenth of a volt will be needed for the following tests.
Ensure battery is fully charged. Ensure A/T is in Park or M/T is in Neutral and parking brake is applied. Disconnect Automatic Shut Down (ASD) relay so engine will not start. ASD relay is located in Power Distribution Center (PDC). Refer to PDC cover for proper relay location. Clutch pedal must be depressed on M/T models. Perform all listed tests in the order given.
PARK/NEUTRAL POSITION SWITCH
- Place gear selector lever in Park. Disconnect negative battery cable. Raise and support vehicle. Disconnect Park/Neutral switch connector. Using an ohmmeter, check for continuity between switch center terminal and good ground. If continuity exists, go to next step. If continuity does not exist, replace faulty switch.
- Place gear selector lever in Reverse. Check for continuity between switch center terminal and good ground. If continuity does not exist, switch is okay. If continuity exists, replace faulty switch.
Note. Also refer to TEST NTC-10A in appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
CLUTCH PEDAL POSITION SWITCH
| WARNING | Deactivate air bag system before performing any service operation involving steering column components. See appropriate AIR BAG RESTRAINT SYSTEMS article in ACCESSORIES & EQUIPMENT. |
- Disconnect negative battery cable. Disconnect clutch pedal position switch connector. Switch is located on clutch pedal push rod. Using an ohmmeter, check for continuity between the two cavities in switch half of connector with clutch pedal released. If continuity does not exist, switch is okay. If continuity exists, replace faulty switch.
- Depress clutch pedal. Check for continuity between the two cavities in switch half of connector. If continuity does not exist, replace faulty switch. If continuity exists, switch is okay, check ignition switch. See «IGNITION SWITCH TEST»(ref-669-S10554619852000031300000) .