Inspection Procedure 6
Sound Volume Is Not Changed If the Vehicle Speed Is Changed.
Connectors:
CIRCUIT OPERATION
If the vehicle speed signal is transmitted to the radio and CD player, sound volume will be changed.
TECHNICAL DESCRIPTION (COMMENT)
If the radio and CD player normally, the cause is probably a faulty radio and CD player 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 Automatic Transaxle/Testing.
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 Tools:
- MB991223: Harness set
STEP 1. Check the combination meter.
Q: Does the combination meter (speedometer) operate normally?
YES: Go to Step 2.
NO: Refer to "Inspection Procedure 1: Speedometer does not work".
STEP 2. Check the multi-center display
Q: Does the multi-center display operate normally?
YES: Go to Step 3.
NO: Refer to "Multi-Center Display/Trouble Symptom Chart.
STEP 3. Check the multi-center display connector C-09 and vehicle speed sensor connector B-39 for damage.
Q: Are multi-center display connector C-09 and vehicle speed sensor connector B-39 in good condition?
YES: Go to Step 4.
NO: Repair or replace it. Refer to Harness Connector Inspection. The sound volume should depend on vehicle speed.
STEP 4. Check the harness wires between multi-center display connector C-09 and vehicle speed sensor connector B-39.
NOTE: After inspecting intermediate connector B-36
Q: Are the harness wires between multi-center display connector C-09 and vehicle speed sensor connector B-39 in good condition?
YES: Repair or replace the radio and CD player. The sound volume should depend on vehicle speed.
NO: Repair them. The sound volume should depend on vehicle speed.