Diagnostic Function

Input Signal Inspection Points:

When Using the Scan Tool (MUT-II)
Using the scan tool, check whether or not the input signals from each switch are being input to the ETACS unit.
1. Connect the scan tool to the data link connector located at the right side of the junction block.

CAUTION: Connection and disconnection of the scan tool should always be made with the ignition switch in the OFF position.

2. Check if the buzzer of the scan tool sounds when each switch noted below is operated.

If the buzzer sounds, the input signals are being input to the ETACS unit, so that switch can be considered to be functioning normally. If not, the switch or switch input circuit is faulty. Check the switch and the switch input circuit.

Input Signal Inspection Points:

When Using the Voltmeter
Using voltmeter, check whether or not the input signals from each switch are being input to the ETACS unit.
1. Connect the voltmeter between the ETACS terminal and the ground terminal which belong to data link connector.
2. Check if the needle of the voltmeter moves when each switch noted below is operated.

If the needle moves, the input signals are being input to the ETACS unit, so that switch can be considered to be functioning normally. If not, the switch or switch input circuit is faulty. Check the switch and the switch input circuit.