Diagnosis And Testing: Front: Notes

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, occupant classification system, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.

If the front wiper motor operates, but the wipers do not move on the windshield, replace the ineffective front wiper module. If the washer pump/motor operates, but no washer fluid is dispensed on the glass; or, if the wipers operate, but chatter, lift, or do not clear the glass, clean and inspect the front wiper and washer system components as required. Refer toFRONT and FRONT .

The hard wired front wiper and washer system circuits and components may be diagnosed and tested using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods may not prove conclusive in the diagnosis of the Steering Control Module (SCM), the Front Control Module (FCM), the Integrated Power Module (IPM), the Controller Area Network (CAN) data bus, or the electronic message inputs or outputs used to provide front wiper and washer system service or many of the electronic features of the front wiper and washer systems. The most reliable, efficient, and accurate means to diagnose the SCM, the FCM, the IPM, the CAN data bus and the electronic message inputs and outputs for the front wiper and washer system requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.