Time Control Unit: Notes
NOTE:
The Time Control Unit (TCU) operates several different systems. The following circuit test procedures only check circuits that control the intermittent wiper and washer operation.
- When testing time control unit, insert probes into harness side of connector while still plugged into control unit. See Fig 1.
- TCU is located behind driver's side kick panel. Ensure ignition key is in correct position when testing each circuit. Perform tests in order: power circuit, TCU output wiper relay circuit, wiper switch circuit, intermittent wiper volume, and washer switch circuit. See WIPER TIME CONTROL UNIT TESTS table.WIPER TIME CONTROL UNIT TESTS
Symptom Affected Circuit No Power at Connector Power Circuit Intermittent Wiper Inoperative TCU Output Wiper Relay Intermittent Wiper Inoperative Wiper Switch Intermittent Time Not Adjustable Intermittent Wiper Speed Wiper/Washer Do Not Operate Together Washer Switch