Audio System Information Does Not Display On The Multi-Information Display (Without Navigation)

Audio System Symptom Troubleshooting - Audio system information does not display on the multi-information display

Audio system information does not display on the multi-information display

NOTE:
* Check the vehicle battery condition first Component Tests and General Diagnostics.
* Check the connectors for poor connections or loose terminals.
* The climate control unit 32P (black) connector and the HFL control unit 32P (grey) connector are the same shape. Make sure the correct connector is connected to the applicable unit.

1. Determine possible failure area (audio system, others):

-1. Turn the ignition switch to ON (II).

-2. Check if any MID information appears on the multi-information display unit.

Is there any information displayed?
-YES- Go to step 2.
-NO- Go to Multi-information display unit does not work troubleshooting.

2. Problem verification:

-1. Turn on the audio unit, and check the audio information on the multi-information display unit.

Does the audio information display properly?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 3.

3. Shorted wire check (DUET CONT line):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connectors.






-3. Check for continuity between test points 1 and 2.










Is there continuity?
-YES- Repair a short to body ground in the wire between the multi-information display unit and the audio unit.
-NO- The DUET CONT wire is not shorted to ground. Go to step 4.

4. Open wire check (DUET CONT line):

-1. Check for continuity between test points 1 and 2.










Is there continuity?
-YES- The DUET CONT wire is OK. Go to step 5.
-NO- Repair an open in the wire between the audio unit and the multi-information display unit.

5. Shorted wire check (DUET RX line, DUET TX line):

-1. Check for continuity between test points 1 and 2.














Is there continuity?
-YES- There is a short to body ground in the wire(s) between the audio unit and the multi-information display unit. Replace the affected shielded harness.
-NO- The DUET RX and the DUET TX wires are not shorted to ground. Go to step 6.

6. Shorted wire check (DUET RX line to DUET TX line):

-1. Check for continuity between test points 1 and 2.










Is there continuity?
-YES- There is a short in the wires between the audio unit and the multi-information display unit. Replace the affected shielded harness.
-NO- The DUET RX and the DUET TX wires are not shorted. Go to step 7.

7. Shorted wire check (SH DUET line to another lines):

-1. Check for continuity between test points 1 and 2.














Is there continuity?
-YES- There is a short in the wires between the audio unit and the multi-information display unit. Replace the affected shielded harness.
-NO- The SH DUET wire is OK. Go to step 8.

8. Open wire check (DUET RX line, DUET TX line):

-1. Check for continuity between test points 1 and 2.














Is there continuity?
-YES- The DUET RX and the DUET TX wires are OK. Go to step 9.
-NO- There is an open in the wire(s) between the audio unit and the multi-information display unit. Replace the affected shielded harness.

9. Audio unit check:

-1. Substitute a known-good multi-information display unit Service and Repair, and recheck.

Does the symptom go away?
-YES- Replace the original multi-information display unit.
-NO- Replace the audio unit Audio Unit Removal and Installation.