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 DMM in order to set to DC scale and measure the voltage between the cellular telephone module connector terminal A and ground.

Is battery voltage present at both of the terminals?

--

Go to Step 3

Go to Step 2

Is the cellular telephone the fixed type?

--

Go to Step 5

Go to Step 4

Repair the short to ground in CKT 40 (ORN).

Is the repair complete?

--

System OK

--

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

Is 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 voice now transmitted?

--

Go to Step 9

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 Step 11

Go to Step 10

System OK.

Is the repair complete?

--

System OK

--

Replace the handset with a known good handset.

Is voice now transmitted?

--

Go to Step 13

Go to Step 12

System OK

Is the repair complete?

--

System OK

--

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

Is voice now transmitted?

--

Go to Step 14

Go to Step 15

System OK

Is the repair complete?

--

System OK

--

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

Is the repair complete?

--

System OK

--

System OK.

Is the repair complete?

--

System OK

--

System OK.

Is the repair complete?

--

System OK

--

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

Is the repair complete?

--

System OK

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