Z31/voicewarningsystem php

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Z31 Voice Warning System

In 1983, the Nissan 200ZG and 300ZX models received a voice warning system, which ran through the 1986 model year. In the US market, it was available only in 1984–1986 GL and GLL models. SF models in Canada and all 1987–1989 Z31s did not have the voice warning system.

The system works by stopping the signal going to the front left speaker(s) and replacing it with a signal of its own. As long as the stock wiring to the front speakers is still connected, the voice warning system will function. It does not use the amp or head unit for power. The voice warning unit is located above and behind the ECU in the passenger kick panel, hidden by insulation.

USDM Voice Warning Messages

The voice warning system has five (5) different messages. They are as follows:

| Message | Reason For Warning | |---|---| | Left door is open | This message will play when you are moving more than 3mph and the left door is open. This message will also play when the trunk lock sensor has come loose or fallen off. | | Right door is open | This message will play when you are moving more than 3mph and the right door is open. | | Lights are on | This message will play when the car is off, the marker lights are on, and the left door is open. | | Fuel level is low | This message is played if the low fuel light has been on for about 30 seconds. It is repeated two or three times and then no longer sounds until the car has been restarted or the light has been off for more than a few seconds. | | Parking brake is on | This message will play if the parking brake has been pulled up enough to turn on the instrument cluster warning light and the car is moving more than a few miles per hour. This message will continue to play until the parking brake has been pushed all the way down and the light has turned off. It will not play if the warning light comes on because of low brake fluid in the master cylinder. |

Common Repairs

The only real problem people run into with this system is when it says the left door is open and it clearly is not. First, ensure the left door light is not on and none of the dome or floor lights are on.

• Remove spare tire cover via the two plastic screws.
• Remove tail light cover via the four plastic retainers (1/4 turn each).
• Look for the lock cylinder sensor (see fig.1).
• Reattach it to the lock cylinder (see fig.2).
• If the warning system still won't be quiet, unplug the unit to test (see fig.3).

Sources Used

1984-1988 Nissan 300ZX Factory Service Manual

• Written by: Paul Hillman (AZ-ZBUM)
• Video by:

VICNASTY1989