Possible DTC

AudioPilot^®2 function is inoperative

Using the M-MDS

U0155:00, U0010:88

Without using M-MDS (On-board diagnostic test mode)

16:Er12

Possible cause

• Audio amplifier malfunction

• Open or short circuit in AudioPilot^®2 signal wiring harness

• Open or short circuit in AudioPilot^®2 microphone signal wiring harness

• Open or short circuit in vehicle speed signal wiring harness (e. g., instrument cluster)

NOTE:

• Inspect the AudioPilot^®2 function while driving the vehicle and playing a CD.

STEP

INSPECTION

ACTION

1

• Turn the AudioPilot^®2 function on.

• Inspect the AudioPilot^®2 function operation while driving the vehicle.

• Does the AudioPilot^®2 system operation properly?

Yes

The system is normal.

Explain the AudioPilot^®2 function to the customer.

No

Go to the next step.

2

• Inspect the connection of the audio amplifier connector (AudioPilot^®2 microphone signal).

• Inspect both the audio amplifier wiring harness-side connector terminal 1H, 1G and 1I for a poor connection (such as damaged/pulled-out pins, corrosion).

• Are all the pins normal?

Yes

Repair or replace the pins and/or the connector.

No

Go to the next step.

3

• Inspect the connection of the AudioPilot^®2 microphone connector (2-pin).

• Inspect the AudioPilot^®2 microphone wiring harness-side connector terminal A and B (2-pin) for poor connection (such as damaged/pulled-out pins, corrosion).

• Are all pins normal?

Yes

Repair or replace the pins and/or the connector.

No

Go to the next step.

4

• Inspect continuity between the following terminals of the audio amplifier connector and body ground.

• Terminal 1H (AudioPilot^®2 microphone+)

• Terminal 1G (AudioPilot^®2 microphone-)

• Terminal 1I (vehicle speed signal)

• Is there continuity?

Yes

Repair or replace the wiring harness for a possible short to ground.

No

Go to the next step.

5

• Inspect continuity between the following terminals of the audio amplifier connector and AudioPilot^®2 microphone/instrument cluster connector.

• Terminal 1H—AudioPilot^®2 microphone terminal B (+)

• Terminal 1G—AudioPilot^®2 microphone terminal A (-)

• Terminal 1I—Instrument cluster terminal O (vehicle speed signal)

• Is there continuity?

Yes

Go to the next step.

No

Repair or replace for open circuit.

6

• Retrieve the DTCs from all vehicle modules using the M-MDS.

• Is there the following DTC displayed?

• Vehicle speed signal

• CAN communication

Yes

Go to the appropriate DTC inspection.

No

Replace the audio amplifier.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)