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Home >> Nissan-Datsun >> 1993 >> Sentra SE-R, Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Testing >> Time Control Unit >> Intermittent Wiper Does Not Operate
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Intermittent Wiper Does Not Operate

  1. Leave TCU harness connector connected. Turn ignition switch to ACC position. With wiper switch in INT or OFF position, measure voltage between TCU connector terminals No. 1 and No. 15. See Figure .
  2. With wiper switch in OFF position, about 12 volts should be present.
  3. If voltage is not as specified, go to next step. If voltage is as specified, check wiper amplifier. See WIPER AMPLIFIER  or WIPER RELAY  under TESTING. If wiper amplifier or wiper relay is okay, repair wiring harness.
  4. With wiper switch in INT or OFF position, measure voltage between TCU connector terminals No. 12 and 15. With wiper switch in OFF position, about 12 volts should be present. With wiper switch in INT position, no voltage should be present.
  5. If voltages are as specified, replace TCU. If voltages are not as specified, check wiper switch. See STEERING COLUMN SWITCHES article in the ACCESSORIES/SAFETY EQUIPMENT section. If wiper switch is okay, repair wiring harness between TCU and wiper switch.
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