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Inspection Procedure 6: Voice guide "Unable to obtain vehicle speed. Please try again or contact your dealer for service" is sent from the speaker
 
 
cautionBefore replacing the hands free module or radio and CD player, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the voice guide "Unable to obtain vehicle speed. Please try again or contact your dealer for service" is sent from the speaker, the vehicle speed signal of hands free module has a problem. At this time, the hands free module, and the vehicle speed signal of radio and CD player may have a problem.
 
 
 
TROUBLESHOOTING HINTS
  • The hands free module may be defective.
  • The radio and CD player may be defective.
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
 
 
DIAGNOSIS
STEP 1. Check the radio and CD player operation.
Check if the speed compensated volume function of radio and CD player works normally during driving.
Is the check result normal?
Go to Step 2
Troubleshoot the radio and CD player (Refer to ).
 
STEP 2. Using scan tool (M.U.T.-III), diagnose the CAN bus line
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 3.
Repair the CAN bus line (Refer to GROUP 54C - Diagnosis ).
 
STEP 3. Using scan tool (M.U.T.-III), read the radio and CD player diagnostic trouble code
Check again if the DTC is set in the radio and CD player.
Is the DTC set?
Troubleshoot the radio and CD player (Refer to ).
Go to Step 4.
 
STEP 4. Check the diagnosis mode
Check if the hands free module can be switched to the diagnosis mode.(Refer to <Vehicles with 1CD audio> or <Vehicles with display audio>.)
Is the check result normal?
Go to Step 5
Perform Inspection Procedure 5: "DIAGNOSIS MODE cannot be made an entry." (Refer to .)
 
STEP 5. Replace the hands free module temporarily, and check the trouble symptom.
Is the check result normal?
Replace the hands free module.
Replace the radio and CD player.