Checking System Inputs

1. Open the glove compartment and connect a voltmeter between terminal for "ETACS" and terminal for ground.
2. Check to be sure that voltage should be output repeatedly in the (A) or (B) pattern shown in the figure at the left when the ignition key is turned to the ON or ACC position.

NOTES:
^ If there is no output of a voltage pattern at all, check the ECU power-supply and ground circuits as described in check chart No. 1.
^ If there is still no output of voltage pattern despite the fact that the power-supply circuit is normal, check for a disconnected or damaged harness of the diagnosis output terminal, or a short-circuit.

3. Check each switch or sensor separately, as described below.






DOOR SWITCHES (ALL DOORS)
1. Turn the ignition key to LOCK.
2. Set the dome light switch to the DOOR position.
3. Check to be sure that the dome light is switched OFF when all doors are closed.

NOTE: If the dome light remains illuminated even though all doors are closed, either there is a short-circuit at one of the door switches, or there is a malfunction of the ECU.

4. With all doors closed, open only the left door.

^ Check to be sure that, at the moment when the door is opened, the dome light lights and the indication of the voltmeter connected to the diagnosis terminal moves by about 2V or more.
^ If it does not, the problem is damaged or disconnected wiring of the left door's door switch input circuit.

5. Check the right door in the same way.

NOTE: If a malfunction is found as a result of the input checking, check according to check chart No. 10.