GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 Body and Accessories 🢒 Entertainment 🢒 Cellular Telephone - Audio Inoperative During Hands-Free

Step

Action

Value(s)

Yes

No

1

Did you perform the Cellular Telephone System Check ?

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Go to Step 2

Go to Cellular Telephone System Check

2
  1. Turn the ignition switch to OFF.
  2. Disconnect the cellular telephone handset connector.
  3. Disconnect the radio connector.
  4. Using a J 39200 digital multimeter (DMM) set to the ohms scale, check for continuity between the following terminals:
    5. • Cellular telephone handset jumper connector terminal C.
    • Radio connector terminal E9.

Is the circuit continuity OK?

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Go to Step 4

Go to Step 3

3

Repair the open in CKT 372 (BLK/WHT)

Is the repair complete?

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Go to Step 13

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4

Using a DMM set to the ohms scale, check for continuity between the following terminals:

    • Cellular telephone handset jumper connector terminal G.
    • Radio connector terminal E10.

Is the circuit continuity OK?

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Go to Step 6

Go to Step 5

5

Repair the open in CKT 367 (BRN/WHT)

Is the repair complete?

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Go to Step 13

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6

Using a DMM set to the ohms scale, check for continuity between the following terminals:

    • Cellular telephone handset jumper connector terminal A.
    • Radio connector terminal E11.

Is the circuit continuity OK?

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Go to Step 8

Go to Step 7

7

Repair the open in CKT 368 (DK GRN/WHT)

Is the repair complete?

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Go to Step 13

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8

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

Is the wiring OK?

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Go to Step 10

Go to Step 9

9

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

Is the repair complete?

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Go to Step 13

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10

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

Is the sound restored?

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Go to Step 11

Go to Step 12

11

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

Is the repair complete?

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Go to Step 13

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12
  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 13

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13
  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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