Cell Phone — Pinpoint Tests

A1: CHECK FOR CELL PHONE SYMBOL ON AUDIO UNIT

1 Check the compatibility of the audio block.

• Does the audio unit have a telephone symbol after the model number?

→ Yes

Go to A2

→ No

INSTALL a new audio unit with a telephone symbol. CHECK the system is working properly.

A2: CHECK THE PHONE SYMBOL ON AUDIO UNIT DISPLAY

1 Drive the ON position.

• INSTALL the cell phone on the handset bracket. When the unit is turned on, does the TELEPHONE SYMBOL appear on the audio unit display?

→ Yes

Go to A3

→ No

Go to B3 Go to PINPOINT TEST B

A3: INSPECT WIRING HARNESS 91S-MD37 FROM AUDIO UNIT TO PORTABLE SUPPORT MODULE

1 Enter the OFF position.

2 Disconnect the Handheld Support Module - C463.

3 Disconnect the Audio Unit - C447.

4 Using a digital multimeter, measure the resistance between pin 4 C447 of the audio unit, circuit 91S - MD37 (black/red), on the wiring side, and pin 11 C463 of the portable operation support module, electrical circuit 91S - MD37 (black/red), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to A4

→ No

Repair the electrical circuit. CHECK the system is working properly.

A4: CHECK THE VOLTAGE IN THE PORTABLE SUPPORT AREA

1 Drive the ON position.

2 Using a DMM, measure the voltage between pin 10 C463 of the handheld support module, circuit 29-MC9 (orange/black), on the wiring harness side, and pin 8 C463 of the handheld support module, circuit 75-MC9 (yellow/green) from the side of the wiring harness and "weight".

• Is the voltage more than 10 V in all cases?

→ Yes

Go to A5

→ No

REPAIR Circuit 29-MC9 (orange/black) or electrical circuit 75-MC9 (yellow/green). CHECK the system is working properly.

A5: CHECK GROUND CIRCUIT 91-MC9 (BLACK/GREEN)

1 Enter the OFF position.

2 Using a digital multimeter, measure the resistance between C463 pin 9 of the handheld support module, circuit 91 - MC9 (black/green), from the wiring side, and "weight".

• Is the resistance less than 5 ohms?

→ Yes

Go to A6

→ No

Repair the electrical circuit. CHECK the system is working properly.

A6: CHECK THE AUDIO UNIT IS FUNCTIONING PROPERLY

1 Substitute with a known-good compatible audio unit.

2 Drive the ON position.

3 Check that the audio unit is working properly.

• Does the message PHONE appear on the audio unit display when a cellular phone is placed on the handset bracket?

→ Yes

INSTALL a new audio unit. CHECK the system is working properly.

→ No

INSTALL the new portable support module. CHECK the system is working properly.

B1: CHECK CELL PHONE DISPLAY WHEN USED OUTSIDE OF VEHICLE

1 Activate the cell phone outside the car.

• Does the cell phone display indicate low battery?

→ Yes

Go to B2 Go to PINPOINT TEST B

→ No

CHECK your cell phone battery. REFER to the instruction manual of the cell phone.

B2: CHECK BATTERY SYMBOL ON CELL PHONE

1 Drive the ON position.

• INSTALL the cell phone on the handset bracket. Is the battery symbol flashing?

→ Yes

The battery is charging correctly. WAIT for the battery to charge. CHECK the system is working properly.

→ No

Go to B3 Go to PINPOINT TEST B

B3: CHECK THE VOLTAGE IN THE PORTABLE SUPPORT AREA

1 Disconnect the Handheld Support Module - C463.

2 Using a DMM, measure the voltage between pin 10 C463 of the handheld support module, circuit 29-MC9 (orange/black), on the wiring harness side, and pin 8 C463 of the handheld support module, circuit 75-MC9 (yellow/green) from the side of the wiring harness and "weight".

• Is the voltage more than 10 V in all cases?

→ Yes

Go to B4 Go to PINPOINT TEST B

→ No

REPAIR Circuit 29-MC9 (orange/black) or electrical circuit 75-MC9 (yellow/green). CHECK the system is working properly.

B4: CHECK 8-MC17 TUBE BRACKET VOLTAGE

1 Disconnect the Tube Bracket - C471.

2 Using a digital multimeter, measure the voltage between pin 10 C471 of tube bracket, circuit 8 - MC17 (white/red), from the wiring side, and "weight".

• Is the voltage over 10 V?

→ Yes

Go to B5 Go to PINPOINT TEST B

→ No

NOTE: If the connector is damaged, install a new wiring harness. REPAIR the electrical circuit. CHECK the system is working properly.

B5: CHECK GROUND CIRCUIT 91-MC9 (BLACK/GREEN)

1 Using a digital multimeter, measure the resistance between C463 pin 9 of the handheld support module, circuit 91 - MC9 (black/green), from the wiring side, and "weight".

• Is the resistance less than 5 ohms?

→ Yes

Go to B6 Go to PINPOINT TEST B

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

B6: CHECK GROUND CIRCUIT 91-MC10 (BLACK/RED)

1 Using a digital multimeter, measure the resistance between pin 9 C471 of tube bracket, circuit 91 - MC10 (black/red), from the wiring side, and "weight".

• Is the resistance less than 5 ohms?

→ Yes

INSTALL the new portable support module. CHECK the system is working properly.

→ No

Repair the electrical circuit. CHECK the system is working properly.

C1: CHECK CELL PHONE SIGNAL WHEN OUTSIDE VEHICLE

NOTE: Make sure you have selected the correct cell phone service network before doing any checks.

1 Use your cell phone while outside the vehicle.

• Does the cell phone provide a good signal outside the car?

→ Yes

Go to C2 Go to PINPOINT TEST C

→ No

TEST the system in an area known to have good signal strength.

C2: CHECK ANTENNA CONNECTION AT HANDLING BRACKET AREA

1 Check the antenna cable connection.

• Is the antenna connected to the handset bracket?

→ Yes

Go to C3 Go to PINPOINT TEST C

→ No

REPAIR the antenna connection. CHECK the system is working properly.

C3: CHECK ANTENNA INSTALLATION

1 Examine the antenna.

• The antenna is correctly installed on the windshield. For more information refer to Antenna - Cell Phone available in this section..

→ Yes

Go to C4 Go to PINPOINT TEST C

→ No

INSTALL the new antenna correctly. For more information refer to Antenna - Cell Phone available in this section. CHECK the system is working properly.

C4: CHECK ANTENNA CABLE FOR SHORT CIRCUIT

1 Using a digital multimeter, measure the resistance between the center conductor of the antenna and "weight" (screen) antennas.

• Is the resistance between 9,000 and 10,000 ohms?

→ Yes

Go to C5 Go to PINPOINT TEST C

→ No

INSTALL a new antenna. For more information refer to Antenna - Cell Phone available in this section. CHECK the system is working properly.

C5: CHECK ANTENNA TO HANDLING BRACKET CONNECTION

1 Using a digital multimeter, measure the resistance between the center conductor of the antenna and "weight" (screen) antennas.

• Is the resistance between 9,000 and 10,000 ohms?

→ Yes

Go to C6 Go to PINPOINT TEST C

→ No

INSTALL a new antenna. For more information refer to Antenna - Cell Phone available in this section. CHECK the system is working properly.

C6: CHECK CONNECTOR CONNECTING HANDSET BRACKET TO CELL PHONE

1 Using a digital multimeter, measure the resistance between C1026 tube bracket pin 2, wiring side, and C1026 tube bracket pin 3, wiring side.

• Is the resistance between 9,000 and 10,000 ohms?

→ Yes

CHECK connection between cell phone and handset bracket. CHECK the system is working properly.

→ No

INSTALL a new tube bracket. For more information, refer to the Tube Bracket available in this section. CHECK the system is working properly.

D1: CHECK IF VOICE IS TRANSMITTED WHEN TALKING OUTSIDE THE VEHICLE

NOTE: Make sure the cell phone is a genuine Ford cell phone. Similar non-Ford branded phones are not compatible with this system. When turned on, the Ford cell phone display shows the Ford logo.

1 Use your cell phone while outside the vehicle.

• Is the cell phone transmitting voice during telephone conversations outside the vehicle?

→ Yes

Go to D2 Go to PINPOINT TEST D

→ No

CONTACT a Motorola Service Center. CHECK the system is working properly.

D2: INSPECT CIRCUIT 3-MC8 (BROWN/RED) ON OPEN

1 Disconnect the Handheld Support Module - C463.

2 Disconnect Microphone - C440.

3 Using a digital multimeter, measure the resistance between C463 pin 2 of the handheld support module, circuit 3 - MC8 (brown/red), wiring side, and microphone pin 1 C440, circuit 3 - MC8 (brown/red), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to D3 Go to PINPOINT TEST D

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

D3: INSPECT CIRCUIT 1-MD26 (WHITE/BLACK) ON OPEN

1 Using a digital multimeter, measure the resistance between C463 pin 3 of the handheld support module, circuit 1 - MD26 (white/black), and pin 1 C440 microphone, electrical circuit 1 - MD26 (white/black), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

INSTALL a new microphone. CHECK the system is working properly.

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

E1: CHECK CELL PHONE OUTSIDE VEHICLE FUNCTIONING

1 PERFORM the audio unit self-test. See Section 415-00 for more information.

2 Use your cell phone while outside the vehicle.

• Does the cell phone function properly outside the vehicle?

→ Yes

Go to E2 Go to PINPOINT TEST E

→ No

CONTACT a Motorola Service Center. CHECK the system is working properly.

E2: CHECK CIRCUIT 1-MD52 FOR OPEN

1 Disconnect the Handheld Support Module - C463.

2 Disconnect the Audio Unit - C447.

3 Using a digital multimeter, measure the resistance between pin 21 C463 of the handheld support module, circuit 1 - MD52 (white/red), on the wiring side, and pin 9 C447 of the audio unit, circuit 1 - MD52 (white/red), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to E3 Go to PINPOINT TEST E

→ No

Repair the electrical circuit. CHECK the system is working properly.

E3: CHECK CIRCUIT 8 - MD52 FOR OPEN

1 Using a digital multimeter, measure the resistance between pin 22 C463 of the handheld support module, circuit 8 - MD52 (white/red), on the wiring side, and pin 8 C447 of the audio unit, electrical circuit 8 - MD52 (white/red), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

INSTALL the new portable support module. CHECK the system is working properly.

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

F1: CHECK CELL PHONE OUTSIDE VEHICLE FUNCTIONING

1 Use your cell phone while outside the vehicle.

• Does the cell phone function properly outside the vehicle?

→ Yes

Go to F2 Go to PINPOINT TEST F

→ No

CONTACT a Motorola Service Center. CHECK the system is working properly.

F2: CHECK 91S-MC19 CIRCUIT FOR OPEN

1 Disconnect the Handheld Support Module - C463.

2 Disconnect the Tube Bracket - C471.

3 Using a digital multimeter, measure the resistance between pin 20 C463 of the handheld support module, circuit 91S - MC19 (black/green), wiring side, and pin 7 C471 of tube bracket, circuit 91S - MC19 (black/green), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to F3 Go to PINPOINT TEST F

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

F3: CHECK 5-MC20 CIRCUIT FOR OPEN

1 Using a digital multimeter, measure the resistance between pin 19 C463 of the handheld support module, circuit 5 - MC20 (blue/yellow), wiring side, and pin 6 C471 of tube bracket, electrical circuit 5 - MC20 (blue/yellow), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to F4 Go to PINPOINT TEST F

→ No

Repair the electrical circuit. CHECK the system is working properly.

F4: CHECK CIRCUIT 4-MC21 FOR OPEN

1 Using a digital multimeter, measure the resistance between pin 18 C463 of the handheld support module, circuit 4 - MC21 (grey/white), wiring side, and pin 5 C471 of tube bracket, circuit 4 - MC21 (grey/white), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to F5 Go to PINPOINT TEST F

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

F5: CHECK CIRCUIT 5-EA10 FOR OPEN

1 Disconnect the Audio Unit - C447.

2 Using a digital multimeter, measure the resistance between pin 13 C463 of the handheld support module, circuit 5 - EA10 (blue/yellow), on the wiring side, and pin 2 C447 of the audio unit, circuit 5 - EA10 (blue/yellow), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to F6 Go to PINPOINT TEST F

→ No

REPAIR the electrical circuit. CHECK the system is working properly.

F6: CHECK CIRCUIT 4-EA10 FOR OPEN

1 Using a digital multimeter, measure the resistance between C463 pin 12 of the handheld support module, circuit 4 - EA10 (gray/black), on the wiring side, and pin 1 C447 of the audio unit, circuit 4 - EA10 (gray/black), from the side of the electrical wiring.

• Is the resistance less than 5 ohms?

→ Yes

Go to A6

→ No

Repair the electrical circuit. CHECK the system is working properly.