6. Sound Volume Is Not Changed If the Vehicle Speed Is Changed

Multi-Center Display To Vehicle Speed Sensor Circuit:

Connectors:

CIRCUIT OPERATION
If the vehicle speed signal is transmitted via the multi-center display to the radio, tape player, CD player and CD auto changer, sound volume will be changed.

TECHNICAL DESCRIPTION (COMMENT)
If the multi-center display operates normally, the cause is probably a faulty multi-center display to vehicle speed sensor circuit.

NOTE: The vehicle speed signal is shared by the MFI system, automatic transaxle, combination meter. If a problem is not resolved, observe the troubleshooting. (Refer to Diagnosis (Computers/Testing) Automatic Transaxle Diagnosis.)

TROUBLESHOOTING HINTS
- Damaged harness wire or connector.
- Malfunction of the vehicle speed sensor.
- Malfunction of the multi-center display.
- Malfunction of the radio, tape player, CD player or CD auto changer.

DIAGNOSIS
Required Special Tool:
MB991223: Harness set

STEP 1. Does the combination meter (speedometer) operate normally?
If no, refer to Symptom Chart.
If yes, go to Step 2.

STEP 2. Does the multi-center display operate normally?
If no, refer to Inspection Procedure 5.
If yes, go to Step 3.

2.4L Engine:

3.0L Engine:

STEP 3. Check the multi-center display connector C-09 and vehicle speed sensor connector B-36 or B-39 for damage.
If multi-center display connector C-09 and vehicle speed sensor connector B-36 or B-39 are damaged, repair or replace it. Refer to Harness Connector Inspection.
The sound volume should depend on vehicle speed.

If the connectors are in good condition, go to Step 4.

2.4L Engine:

3.0L Engine:

STEP 4. Check the harness wires between multi-center display connector C-09 and vehicle speed sensor connector B-36 or B-39 .

NOTE: After inspecting intermediate connector C-28 and joint connector C-77, inspect the wires. If intermediate connector C-28 and joint connector C-77 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between multi-center display connector C-09 and vehicle speed sensor connector B-36 or B-39 are damaged, repair them.
The sound volume should depend on vehicle speed.

If the harness wires are in good condition, repair or replace the multi-center display or radio, tape player, CD player or CD auto changer.
The sound volume should depend on vehicle speed.