DTC 15

Auto-cruise Control Switch Circuit:

Connectors:

CIRCUIT OPERATION
This circuit judges the signals of each switch ("OFF," "SET" "RESUME," "CANCEL" and "MAIN") of the auto-cruise control switch.

The auto-cruise control-ECU detects the state of the auto-cruise control switch by sensing the voltages shown.
- When all switches are "OFF" - 4.5 volts
- When "SET" switch is "ON" - 1.5 volts
- When "RESUME" switch is "ON" - 3.0 volts
- When "CANCEL" switch is "ON" - 0 volt
- When main switch is "ON" - 9.0 volts

DTC SET CONDITIONS
This code is output when the auto-cruise control switch "RESUME" switch, "SET" switch or "CANCEL" switch stays "ON."

TROUBLESHOOTING HINTS
Possible malfunction of the auto-cruise control switch.

DIAGNOSIS

Check the auto-cruise control switch.
1. Disconnect the auto-cruise control switch.







2. Measure the resistance between the terminals when each of the "SET" "RESUME," "CANCEL" and "MAIN" switches is pressed.

If the values measured correspond to those in the table, there is no problem.

Check that diagnostic trouble code 15 is not output.