Test 24A - Diagnosing Washer Pump Problem
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
in this article. For wiring diagrams, see WIRING DIAGRAMS
in this article.
CAUTION:
Always turn ignition off prior to disconnecting or connecting any module connector.
- Check washer fluid level. Add fluid if necessary. Perform TEST VER-1B . If fluid level is okay, go to next step.
- Ensure washer fluid lines and nozzles are undamaged and unrestricted. Repair lines and nozzles as necessary. Perform TEST VER-1B. If lines and nozzles are okay, go to next step.
- Disconnect washer pump motor connector. Using DRB in voltmeter mode, check voltage on washer pump control switch output circuit (Brown wire) at washer pump connector. Engage washers while observing DRB voltage. If voltage is more than 10 volts while engaging washers, go to step 5). If voltage is less than 10 volts while engaging washers, go to next step.
- Gain access to multifunction switch connector. Check voltage on washer pump control switch output circuit (Brown wire) at multifunction switch connector terminal No. 3. With probe connected, engage washers. If voltage is more than 10 volts while engaging washers, repair open Brown wire. Perform TEST VER-1B. If voltage is less than 10 volts while engaging washers, replace multifunction switch. Perform TEST VER-1B.
- Turn ignition off. Using DRB in ohmmeter mode, check resistance of ground circuit (Black wire) at washer pump connector. If resistance is more than 5 ohms, repair open Black wire. Perform TEST VER-1B. If resistance is less than 5 ohms, replace washer pump motor. Perform TEST VER-1B.