1. Turn the ignition to the OFF position.
2. Disconnect the cellular telephone module connector.
3. Turn the ignition to the RUN position.
4. Use a J 39200 digital multimeter (DMM) set to DC scale in order to measure the voltage between the cellular telephone module connector terminal A and ground.

Is battery voltage present at both of the terminals?

B+

Go to Step 3

Go to Step 2

Is the cellular telephone a fixed type?

--

Go to Step 5

Go to Step 4

Repair the short to ground in CKT 40 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Cellular Telephone System Check

--

Replace the handset-to-cellular telephone handset interface cord using a known good cord.

Is the voice now transmitted?

--

Go to Step 7

Go to Step 6

Replace the handset-to-phone cellular telephone handset interface cord using a known good part.

Is the voice now transmitted?

--

Go to Cellular Telephone System Check

Go to Step 8

Replace the cellular telephone handset interface to the harness connector jumper with a known good part.

Is voice now transmitted?

--

Go to Cellular Telephone System Check

Go to Step 9

Replace the handset.

Is the repair complete?

--

System OK

--

Replace the handset with a known good handset.

Is the voice now transmitted?

--

Go to Cellular Telephone System Check

Go to Step 10

Replace the cellular telephone handset interface with a known good part.

Is the voice now transmitted?

--

Go to Cellular Telephone System Check

Go to Step 10

1. Inspect all of the connectors for the proper terminal contact.
2. If the contact is OK, replace the cellular telephone module.

Is the repair complete?

--

Go to Cellular Telephone System Check

--