PINPOINT TEST G240073P1

Pinpoint Tests

PINPOINT TEST G240073p1 : DTC C1459: FORWARD ALERT SWITCH CIRCUIT TESTS

G240073t1 : CHECK THE FORWARD ALERT SWITCH FOR OPEN CIRCUIT
1. Disconnect the battery negative terminal.
2. Disconnect the ACC module connector IP78.
3. Disconnect the forward alert switch connector IP50.
4. Measure the resistance between the ACC module connector IP78, pin 20 (U) and forward alert switch connector IP50, pin 04 (U).

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
GO to Pinpoint Test G240073t8.

G240073t8 : CHECK THE FORWARD ALERT SWITCH FOR SHORT CIRCUIT TO B+
1. Reconnect the battery negative terminal.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between the ACC module connector IP78, pin 20 (U) and GROUND.

- Is the voltage greater than 3 volts?

-> Yes
REPAIR the short to B+. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new forward alert switch. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ACC module.