Time Control Unit

NOTE: The Time Control Unit is used only on Maxima, 240SX and 300ZX models. Control unit operates many different systems for each vehicle. The following circuit test procedures only check the circuits that control the wiper delay operation.

Fig 1: Harness Connectors On Time Control Unit

Courtesy of NISSAN MOTOR CO., U.S.A.

When testing time control unit, insert probes into harness side of connector while still plugged into control unit. See Fig 1 . Ensure ignition key is in correct position when testing each circuit. Perform tests in order listed.

Power Circuit
TCU Output Wiper Relay Circuit
Wiper Switch Circuit
Intermittent Wiper Volume