Did you perform the Cellular Telephone System Check ?

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Go to Step 2

Go to Cellular Telephone System Check

Turn on the radio and test the operation of the cellular telephone.

Is the audio noisy when the radio is on also?

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Go to Radio/Audio System Check in Entertainment

Go to Step 3

Using a J 39200 digital multimeter (DMM) set to the ohms scale, check the coaxial cable in both the center conductor and the shield for continuity between the following components:

Is the circuit continuity OK?

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Go to Step 5

Go to Step 4

Replace the coaxial cable.

Is the repair complete?

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Go to Step 12

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Using a DMM, check for continuity between the following terminals:

Is the circuit continuity OK?

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Go to Step 7

Go to Step 6

Repair the open in the following circuits:

Is the repair complete?

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Go to Step 12

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Check the cellular telephone handset-to-harness connector jumper wiring for continuity.

Is the wiring OK?

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Go to Step 9

Go to Step 8

Replace the cellular telephone handset-to-harness connector jumper.

Is the repair complete?

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Go to Step 12

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Test the cellular telephone operation using a known good cellular telephone handset.

Is the sound restored?

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Go to Step 10

Go to Step 11

Replace the cellular telephone handset. Refer to Cellular Telephone Replacement .

Is the repair complete?

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Go to Step 12

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1. Inspect the cellular telephone module connector for poor terminal contact.
2. If OK, replace the cellular telephone module. Refer to Radio Frequency Booster and Bracket Assembly Replacement .

Is the repair complete?

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Go to Step 12

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1. Make sure any components removed during diagnosis are installed in place and that all connectors are connected.
2. Repeat the system check. Refer to Cellular Telephone System Check .

Is the system check complete?

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System OK

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