Checking the automatic transmission gear position signal (Honda Accord 3)

This signal is sent to the control unit when the gearbox is in neutral or PARK position.

Turn on the ignition.

While watching the automatic transmission gear indicator, shift the gear selector through all positions.

If the indicator does not light up properly, then the automatic transmission gear indicator should be checked.

If the indicator is working properly, then you should measure the voltage between 32 (Black (-)) and alternately 14 (Green (+)) and 15 (Green/White (+)) contacts in any gear other than neutral or PARK.

If there is battery voltage, then see point A), if not, then point B).

A) Measure the voltage between terminals 14 (Green (+)) and 32 (Black (-)) in neutral gear.

If the voltage is higher than 3 V, then you should repair the break in the Green wire between the automatic transmission gear indicator switch and terminal 14 of the control unit.

If the voltage is below 3V, then measure the voltage between pins 15 (Green/White (+)) and 32 (Black (-)) on the PARK transmission.

If the voltage is below 3V, the automatic transmission gear position signal is normal.

Otherwise, the break in the Green/White wire between the automatic transmission gear indicator switch and terminal 15 of the control unit should be repaired.

B) Turn off the ignition. Disconnect the connectors from the control unit.

Check for electrical continuity between pins 32 (Black) and 14 (Green) and 15 (Green/White) in turn.

If there is an electrical connection, then the short circuit in the Green or Green/White wire between the automatic transmission gear indicator switch and terminals 14 or 15 of the control unit should be repaired.

If there is no electrical connection, the control unit should be replaced.

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