Pinpoint Test G239843P12

PINPOINT TEST G239843p12 : CHECK THE SUPPLIES AND GROUNDS TO THE ICE HEAD UNIT

G239843t66 : CHECK THE PERMANENT SUPPLY TO THE HU
1. Disconnect the HU electrical connector, CC08.
2. Measure the voltage between CC08, pin 11 (NW) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the NU and battery. This circuit includes the primary junction box (fuse 38). TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t67.

G239843t67 : CHECK THE ACCESSORY SUPPLY TO THE HU
1. Turn the ignition switch to the ACC position.
2. Measure the voltage between CC08, pin 02 (YR) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the HU and battery. This circuit includes the primary junction box (fuse 11) and the ignition switch. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t68.

G239843t68 : CHECK THE GROUND TO THE HU
1. Measure the resistance between CC08, pin 01 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. TEST the system for normal operation.

-> NO
CHECK for DTCs indicating a network or module fault. REFER to the DTC index.