Pinpoint Test G239843P8

PINPOINT TEST G239843p8 : CHECK THE SUPPLIES AND GROUNDS TO THE CELLULAR PHONE MODULE

G239843t53 : CHECK THE PERMANENT SUPPLY TO THE PHONE MODULE
1. Disconnect the phone module electrical connector, TL07.
2. Measure the voltage between TL07, pins 12 and 13 (RW) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the phone module and battery. This circuit includes the primary junction box (fuse 30). TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t54.

G239843t54 : CHECK THE ACCESSORY SUPPLY TO THE PHONE MODULE
1. Turn the ignition switch to the ACC position.
2. Measure the voltage between TL07, pin 14 (YU) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the phone module and battery. This circuit includes the primary junction box (fuse 20) and the ignition switch. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t55.

G239843t55 : CHECK THE IGNITION SUPPLY TO THE PHONE MODULE
1. Turn the ignition switch to the ON position.
2. Measure the voltage between TL07, pin 29 (WR) and GROUND.

- Is the voltage less than 10 volts?

-> YES
REPAIR the circuit between the phone module and battery. This circuit includes the primary junction box (fuse 32) and the ignition switch. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G239843t56.

G239843t56 : CHECK THE GROUND TO THE PHONE MODULE
1. Measure the resistance between TL07, pins 09 and 25 (BK) 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 wake-up circuit or optical ring fault. REFER to the DTC index.