Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Cellular Telephone System
Check performed?
| --
|
Go to Step 2
| Go to
Cellular Telephone System Check
|
2
|
- Make sure the telephone is on and that the handset is docked.
- Press the PHONE button on the LH side steering wheel controls.
Does a beep sound through the audio system speakers?
| --
|
Go to Step 5
|
Go to Step 3
|
3
| Check the telephone volume display
on the driver information center (DIC).
Is the phone volume adjusted to more than 5 bars on the display?
| --
|
Go to Step 7
|
Go to Step 4
|
4
| Increase the phone volume, as indicated
on the DIC.
Is the adjustment complete?
| --
|
Go to Step
15
| --
|
5
| Observe the telephone handset display.
Is the MUTE message illuminated (indicating that the hands free microphone
is muted)?
| --
|
Go to Step 6
|
Go to Step 7
|
6
|
- Press the keys FCN and STO at the same time on the handset keypad.
- Press the PHONE button on the LH side steering wheel control.
Does a beep sound from the audio speakers?
| --
|
Go to Step 7
|
Go to Step
8
|
7
| Diagnose the audio system under hands free operation. Refer
to
Cellular Telephone - Audio Inoperative During Hands-Free
Is the repair complete?
| --
|
Go to Step
15
| --
|
8
|
- Turn the ignition switch to OFF.
- Disconnect the cellular telephone module connector.
- Disconnect the cellular telephone microphone connector.
- Using a DMM set to DC volts scale, check the voltage between cellular
telephone module connector terminals 14 and 15.
Is the measured voltage in the range shown?
| Above 0.5 Volts
|
Go to Step 9
|
Go to Step
10
|
9
| Repair short to battery positive voltage on CKT 655 (GRY).
Is the circuit repair complete?
| --
|
Go to Step
15
| --
|
10
|
- Connect fused jumpers from cellular telephone microphone connector
terminal A to ground and terminal B to ground.
- Using a DMM set to ohms scale, measure the resistance from cellular
telephone module connector terminal 14 to ground, then terminal 15 to ground.
Is the measured resistance in the range shown for each measurement?
| Less
than 2ohms
|
Go to Step 12
|
Go to Step 11
|
11
| Repair open or high resistance in CKT 655 (GRY) or in the microphone
return circuit.
Is the circuit repair complete?
| --
|
Go to Step
15
| --
|
12
|
- Replace the cellular telephone microphone with a known good microphone.
Refer to
Hands-Free Microphone Replacement
.
- Reconnect the cellular telephone module connector.
- Attempt to establish hands free operation.
Is the hands free operation OK?
| --
|
Go to Step
13
|
Go to Step 14
|
13
|
- Check the cellular telephone microphone connector for poor terminal
contact.
- If OK, the cellular telephone microphone (replaced in step 12)
is faulty.
Is the replacement complete?
| --
|
Go to Step
15
| --
|
14
|
- Check cellular telephone module connector for poor terminal contact.
- If OK, replace the cellular telephone module. Refer to
Radio Frequency Booster and Bracket Assembly Replacement
.
Is the replacement complete?
| --
|
Go to Step
15
| --
|
15
|
- Make sure any components removed during diagnosis are installed
in place and that all connectors are connected.
- Repeat the system check. Refer to
Cellular Telephone System Check
.
Is the system check complete?
| --
| System OK
| --
|
