Time Control Unit Test
NOTE: The Time Control Unit (TCU) is used on Maxima, Stanza, 240SX and 300ZX models. Control unit operates many different systems for each vehicle. The following circuit test procedures only check circuits that control the wiper delay operation.
When testing time control unit, insert probes into harness side of connector while still plugged into control unit. See Figure and Figure . 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