Radio & CD Player - Lancer Evolution: Diagnosis Mitsubishi Lancer X рестайлинг

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to TROUBLESHOOTING CONTENTS .

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Scheme 55

1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON" position. NOTE: When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7. Start the scan tool system on the personal computer. NOTE: Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

Note. If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool MB991958 does not display.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "System select" from the start-up screen.
4. Select "From 2006 MY" of "Model Year." When the "Vehicle Information" is displayed, check the contents.
5. Select "Meter" from "System List," and press the "OK" button. NOTE: When the "Loading Option Setup" list is displayed, check the applicable item.
6. Select "Diagnostic Trouble Code." to read the DTC.
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.

HOW TO DIAGNOSE THE CAN BUS LINES

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it matches the vehicle being diagnosed. If they match, go to Step 8 . If not, go to Step 5.
5. Select the "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again that it matches the vehicle being diagnosed. If they match, go to Step 8. If not, go to Step 5 .
8. Select the "OK" button.
9. When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

DIAGNOSTIC TROUBLE CODE CHART

DIAGNOSTIC TROUBLE CODE CHART

TROUBLE JUDGMENT

When the radio and CD player is returned from the bus off state, or when the bus error is indicated to the radio and CD player state, the DTC U0019 (CAN-B) is set.

COMMENTS ON TROUBLE SYMPTOM

The radio and CD player, power supply for the radio and CD player, ground circuit, or CAN bus line may have a problem.

DIAGNOSIS

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) .) On completion, go to Step 2.
2. STEP 2. Check whether the scan tool MB991958 can communicate with the radio and CD player. Q: Is the check result normal? YES: Erase the diagnostic trouble code. The procedure is complete. NO: Check the power supply circuit of the radio and CD player, and repair if necessary.

DIAGNOSTIC FUNCTION

If the signal from ETACS-ECU cannot be received, the radio and CD player sets the DTC U0141.

TROUBLESHOOTING HINTS

1. The CAN bus line may be defective
2. The radio and CD player may be defective
3. The ETACS-ECU may be defective

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the ETACS diagnostic trouble code. Check if DTC is set to the ETACS-ECU. Q: Is the DTC set? YES: Diagnose the ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592588-S03824957682014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the combination meter diagnostic trouble code. Check if DTC U0141 is set to the combination meter. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the ETACS-ECU. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the ETACS-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the ETACS-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the signal from SRS-ECU cannot be received, the radio and CD player sets DTC U0151.

1. The CAN bus line may be defective
2. The radio and CD player may be defective
3. The SRS-ECU may be defective

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the SRS-ECU diagnostic trouble code Check again if the DTC is set to the SRS-ECU. Q: Is the DTC set? YES: Troubleshoot the SRS (Refer to «TROUBLESHOOTING»(ref-592595-S26035912682014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the combination meter diagnostic trouble code. Check if the DTC U0151 is set to the combination meter. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the SRS-ECU. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the SRS-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the SRS-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

When the signals from occupant classification-ECU cannot be received, the radio and CD player sets DTC U0154.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.
3. The occupant classification-ECU may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the occupant classification-ECU diagnostic trouble code. Check if DTC is set to the occupant classification-ECU. Q: Is the DTC set? YES: Troubleshoot the SRS (Refer to «DIAGNOSIS»(ref-592595-S02457228182014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the combination meter diagnostic trouble code. Check if the DTC U0154 is set to the combination meter. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the occupant classification-ECU. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the occupant classification-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the occupant classification-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

When the signals from combination meter cannot be received, the radio and CD player sets DTC U0155.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.
3. The combination meter may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958 read the combination meter diagnostic trouble code. Check whether a combination meter DTCs are set or not. Turn the ignition switch to the "ON" position. Check for combination meter DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the combination meter (Refer to «DIAGNOSIS»(ref-592598-S42095597642014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check if the DTC U0155 is set to the ETACS-ECU. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the combination meter. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the combination meter and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the combination meter and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the signal from A/C-ECU cannot be received, the radio and CD player sets DTC U0164.

1. The CAN bus line may be defective.
2. The A/C-ECU may be defective.
3. The radio and CD player may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the A/C-ECU diagnostic trouble code. Check if DTC is set to the A/C-ECU. Q: Is the DTC set? YES: Troubleshoot the A/C-ECU (Refer to «MANUAL A/C DIAGNOSIS»(ref-592583-S22899019132014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the ETACS diagnostic trouble code. Check if the DTC U0164 is set to the ETACS-ECU. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the A/C-ECU. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the A/C-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the A/C-ECU and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the signal from KOS-ECU or WCM cannot be received, the radio and CD player sets DTC U0168.

1. Malfunction of CAN bus line may be defective.
2. Malfunction of the KOS-ECU may be defective.
3. Malfunction of the WCM may be defective.
4. Malfunction of radio and CD player may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicles Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the KOS-ECU or WCM diagnostic trouble code. Check again if the DTC is set to the KOS-ECU or WCM . Q: Is the DTC set? YES: Troubleshoot the KOS or WCM (Refer to «DIAGNOSIS»(ref-592599-S30396047812014011000000) or «DIAGNOSIS»(ref-592600-S38912740882014011000000) ). NO: Go to Step 3.
3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

When the signals from satellite radio tuner cannot be received, the radio and CD player sets DTC U0195.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.
3. The satellite radio tuner may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958 read the satellite radio tuner diagnostic trouble code. Check whether a satellite radio tuner DTCs are set or not. Turn the ignition switch to the "ON" position. Check for satellite radio tuner DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the satellite radio tuner. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592602-S18973957812014011000000) ). NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the SRS-ECU diagnostic trouble code. Check if the DTC U0195 is set to the SRS-ECU. Q: Is the DTC set? YES: Go to Step 4. NO: Go to Step 5 .
4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the satellite radio tuner. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the satellite radio tuner and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction such as a poor connection or open circuit in the CAN bus lines between the satellite radio tuner and the radio and CD player (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

When the vehicle information data is not registered to the audio unit, the radio and CD player sets the diagnostic trouble code No.U1415.

1. Malfunctions of radio and CD player
2. Malfunction of the ETACS-ECU
3. Malfunction of CAN bus line wiring harness and connector

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Using scan tool MB991958, read the other system DTC. Check if the diagnostic trouble code relating to the coding error is set to the ETACS-ECU. Turn the ignition switch to the "ON" position. Check for DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the ETACS-ECU (Refer to «DIAGNOSIS»(ref-592588-S03824957682014011000000) ), and then go to Step 3. NO: Go to Step 3.
3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the radio and CD player continuously apply the voltage of two volts or more to the speakers for one minute or more, it is determined that the offset voltage is exceeded, and then the diagnostic trouble code is set.

The radio and CD player or CAN bus line may have a problem.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) .) On completion, go to Step 2.
2. STEP 2. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the communication cannot be established consecutively for 10 times between the incorporated tuner of radio and CD player and the microcomputer, the diagnostic trouble code is set.

The radio and CD player or CAN bus line may have a problem.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) .) On completion, go to Step 2.
2. STEP 2. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

During the use of the radio and CD player , if any of the ERROR, ERROR01, ERROR02, ERROR03, ERROR DC or ERROR HOT continues for 1 minute, the diagnostic trouble code is set.

The radio and CD player or CAN bus line may have a problem.

1. The radio and CD player may be defective.< CD changer built-in type>
2. The CAN bus line may be defective.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. CD check Playback a clean and unscratched CD for one minute, and recheck if the diagnostic trouble code is set to the radio and CD player. Erase the diagnostic trouble code. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Playback the clean, unscratched CD for one minute. Check if diagnostic trouble code is set. Q: Is the DTC set? YES: Go to Step 3. NO: Clean the CD, use a CD without scratches and burrs, or remove the CD burrs, and then reinsert the CD.
3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

During the use of the radio and CD player, if any of the ERROR, ERROR01, ERROR02, ERROR03, ERROR DC or ERROR HOT continues for 1 minute, the diagnostic trouble code is set.

The radio and CD player or CAN bus line may have a problem.

Required Special Tools

1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. CD check Playback a clean and unscratched CD for one minute, and recheck if the diagnostic trouble code is set to the radio and CD player. Erase the diagnostic trouble code. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Playback the clean, unscratched CD for one minute. Check if diagnostic trouble code is set. Q: Is the DTC set? YES: Go to Step 3. NO: Clean the CD, use a CD without scratches and burrs, or remove the CD burrs, and then reinsert the CD.
3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).

If the radio and CD player cannot establish the communication with center panel assembly for 1 minute or more, the diagnostic trouble code is set.

The radio and CD player, center panel assembly, or CAN bus line may have a problem.

1. The CAN bus line may be defective.
2. The radio and CD player may be defective.
3. The center panel unit may be defective.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958 Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827 M.U.T.-III USB Cable MB991910 M.U.T.-III Main Harness A

Scheme 56

Scheme 57

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Check center panel unit connector C-124 and radio and CD player connector C-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are center panel unit connector C-124 and radio and CD player connector C-109 in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
3. STEP 3. Check the wiring harness between center panel unit connector C-124 (terminal 1, 2) and radio and CD player connector C-109 (terminal 8, 18). Check the wiring harness for open circuit and short circuit. Q: Is the wiring harness between center panel unit connector C-124 (terminal 1, 2) and radio and CD player connector C-109 (terminal 8, 18) in good condition? YES: Go to Step 4. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
4. STEP 4. Check the ground circuit to the center panel unit. Measure the resistance at center panel unit connector C-124. Disconnect the connector, and measure at the wiring harness side. Measure resistance between terminal 9 and ground. OK: The resistance should be 2 ohm or less. Q: Is the measured resistance 2 ohms or less? YES: Go to Step 6 . NO: Go to Step 5.
5. STEP 5. Check the wiring harness between center panel unit connector C-124 (terminal 9) and ground. Check the ground wires for open circuit. Q: Is the wiring harness between center panel unit connector C-124 (terminal 9) and ground in good condition? YES: Go to Step 8 . NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
6. STEP 6. Check the power supply circuit to the center panel unit. Measure the voltage at center panel unit connector C-124. Disconnect the connector, and measure at the harness side connector. Measure voltage between terminal 7 and ground. OK: Battery positive voltage Q: Is the measured voltage battery voltage? YES: Go to Step 8 . NO: Go to Step 7.
7. STEP 7. Check the wiring harness between center panel unit connector C-124 (terminal 7) and fusible link 36. Check the power supply line for open circuit and short circuit. NOTE: Also ETACS-ECU connector C-307, C-317 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector ETACS-ECU connector C-307, C-317 are damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between center panel unit connector C-124 (terminal 7) and fusible link 36 in good condition? YES: Go to Step 8. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
8. STEP 8. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Go to Step 9. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
9. STEP 9. Recheck for diagnostic trouble code. Temporarily replace the center panel unit, and recheck that the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: Replace the center panel unit.

If the radio and CD player consecutively receive the display trouble signal from the center panel assembly for 1 minute, the diagnostic trouble code is set.

1. Malfunction of center panel assembly
2. Malfunction of CAN bus line wiring harness and connector

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-592601-S37903206552014011000000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) ).
2. STEP 2. Recheck for diagnostic trouble code. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if the DTC is set. Q: Is the DTC set? YES: Go to Step 3. NO: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ).
3. STEP 3. Replace the center panel assembly temporarily, and check whether the diagnostic trouble code is set. Check again if the DTC is set to the radio and CD player. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is set. Q: Is the DTC set? YES: Replace the radio and CD player. NO: Replace the center panel assembly.

TROUBLE SYMPTOM CHART

TROUBLE SYMPTOM CHART

Note. For the troubleshooting of the USB box, refer to TROUBLESHOOTING . For the troubleshooting of the hands free module, refer to TROUBLE SYMPTOM CHART . For the troubleshooting of the steering wheel audio remote control switch, refer to DIAGNOSIS .

Inspection Procedure 1: Power Is Not Turned ON When The Power Switch Is Turned ON

Scheme 58

Provided that the audio diagnostic trouble code is not set, if the power for radio and CD player cannot be turned ON, the radio and CD player, or power supply circuit for radio and CD player may have a problem, or the option coding information may be inconsistent.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

Scheme 59

Scheme 60

1. STEP 1. ETACS-ECU coding data check. Operate scan tool MB991958 to read the ETACS-ECU option coding information (Refer to «CODING TABLE»(ref-592586-S01387040712014011000000) ). Check that the "AUDIO" is set to "Present." Q: Is the check result normal? YES: Go to Step 2. NO: Operate scan tool MB991958 to set the option coding "AUDIO" to "Present", and check the trouble symptom.
2. STEP 2. Using scan tool MB991958, diagnose the CAN bus line. Use scan tool MB991958 to diagnose the CAN bus lines. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result normal? YES: Go to Step 3. NO: Repair the CAN bus line. (Refer to «DIAGNOSIS»(ref-592596-S42814782062014011000000) .) On completion, go to Step 3.
3. STEP 3. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check if the diagnostic trouble code is set to the ETACS-ECU. Q: Is the DTC set? YES: Troubleshoot the ETACS-ECU (Refer to «DIAGNOSIS»(ref-592588-S03824957682014011000000) ). NO: Go to Step 4.
4. STEP 4. Using scan tool MB991958, check data list. Check the input signal of ACC relay. Turn the ignition switch to the ACC position. ITEM CHART Item No. Item name Normal conditions Item 288 ACC switch ON OK: Normal condition is displayed. Q: Is the check result normal? YES: Go to Step 5. NO: Refer to «INSPECTION PROCEDURE 1 "THE IGNITION SWITCH (ACC) SIGNAL IS NOT RECEIVED"»(ref-592588-S32730940172014011000000) .
5. STEP 5. Check ETACS-ECU connector C-317 and radio and CD player connector C-107 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are ETACS-ECU connector C-317 and radio and CD player connector C-107 in good condition? YES: Go to Step 6. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ). The steering remote control switch should work normally.
6. STEP 6. Check the wiring harness between ETACS-ECU connector C-317 (terminal 1) and radio and CD player connector C-107 (terminal 30). Check the power supply lines (battery power supply) for open circuit and short circuit. Q: Is the wiring harness between ETACS-ECU connector C-317 (terminal 1) and radio and CD player connector C-107 (terminal 30) in good condition? YES: Go to Step 7. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
7. STEP 7. Check the power supply circuit to the ETACS-ECU. Measure the voltage at ETACS-ECU connector C-307. Disconnect the connector, and measure at the wiring harness-side connector. Measure the voltage between terminal 2 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage battery voltage? YES: Go to Step 9 . NO: Go to Step 8.
8. STEP 8. Check the wiring harness between ETACS-ECU connector C-307 (terminal 2) and fusible link (36) Check the power supply line for open circuit and short circuit. Q: Is the wiring harness between ETACS-ECU connector C-307 (terminal 2) and fusible link (36) in good condition? YES: Go to Step 9. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
9. STEP 9. Check that the radio and CD player is correctly grounded The radio and CD player should be connected to the ground with an assembling screw. Q: Is the radio and CD player correctly grounded? YES: Go to Step 10. NO: Securely install and ground the radio and CD player.
10. STEP 10. Retest the system Check if the radio and CD player power is turned ON. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO: Replace the radio and CD player.

Inspection Procedure 2: No Sound Is Heard

Scheme 61

Scheme 62

If the audio sound is not output, the radio and CD player, audio amplifier, or power supply circuit of audio amplifier may have a problem, or the option coding information may be inconsistent.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

Scheme 63

Scheme 64

Scheme 65

Scheme 66

Scheme 67

Scheme 68

1. STEP 1. Check the ETACS-ECU coding data. Operate the scan tool MB991958 to read the ETACS-ECU option coding information (Refer to «CODING TABLE»(ref-592586-S01387040712014011000000) ). Check that the "Number of speaker" is set to "Premium." Q: Is the check result normal? YES: Go to Step 2. NO: Operate scan tool MB991958 to set the option coding "Number of speaker" to "Premium," and check the trouble symptom.
2. STEP 2. Check audio amplifier connector D-29 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is audio amplifier connector D-29 in good condition? YES: Go to Step 3. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
3. STEP 3. Check the ground circuit to the audio amplifier. Measure the resistance at audio amplifier connector D-29. Disconnect audio amplifier connector D-29, and measure the resistance available at the wiring harness side of the connector. Measure the resistance between terminal 24 and ground. OK: The resistance should be 2 ohms or less Measure the resistance between terminal 31 and ground. OK: The resistance should be 2 ohms or less Measure the resistance between terminal 32 and ground. OK: The resistance should be 2 ohms or less Q: Is the measured resistance 2 ohms or less? YES: Go to Step 5 . NO: Go to Step 4.
4. STEP 4. Check the wiring harness between audio amplifier connector D-29 (terminal 24, 31, 32) and ground. Check the ground wires for open circuit. Q: Is the wiring harness between audio amplifier connector D-29 (terminal 24, 31, 32) and ground in good condition? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
5. STEP 5. Check the power supply circuit to the audio amplifier. Measure the voltage at audio amplifier connector D-29. Disconnect audio amplifier connector D-29, and measure the voltage available at the wiring harness-side connector. Measure the voltage between terminal 25 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Measure the voltage between terminal 35 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Measure the voltage between terminal 36 and ground. OK: The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage battery voltage? YES: Go to Step 7 . NO: Go to Step 6.
6. STEP 6. Check the wiring harness between audio amplifier connector D-29 (terminal 25, 35, 36) and fusible link (36). Check the power supply line for open circuit and short circuit. NOTE: Also check intermediate connector C-47 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-47 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between audio amplifier connector D-29 (terminal 25, 35, 36) and fusible link (36) in good condition? YES: Go to Step 7. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
7. STEP 7. Check radio and CD player connector C-109 and audio amplifier connector D-30 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are radio and CD player connector C-109 and audio amplifier D-30 in good condition? YES: Go to Step 8. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
8. STEP 8. Check the wiring harness between radio and CD player connector C-109 (terminal 17) and audio amplifier connector D-30 (terminal 3), and between radio and CD player connector C-109 (terminal 7) and audio amplifier connector D-29 (terminal 34). Check the communication lines for open circuit and short circuit. NOTE: Also check intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between radio and CD player connector C-109 (terminal 17) and audio amplifier connector D-30 (terminal 3), and between radio and CD player connector C-109 (terminal 7) and audio amplifier connector D-29 (terminal 34)? YES: Go to Step 9. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
9. STEP 9. Retest the system Replace the audio amplifier, then check that the audio sound is output. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO: Replace the radio and CD player.

Inspection Procedure 3: No Sound Is Heard From One Of The Speakers

Scheme 69

Scheme 70

If the sound is not output from one of the speakers, the speaker, radio and CD player, communication line from the radio and CD player to the speakers may have a problem.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. ETACS-ECU coding data check. Operate the scan tool to read the ETACS-ECU option coding information (Refer to «CODING TABLE»(ref-592586-S01387040712014011000000) ). Check that the "Number of speaker" is set to "6 speakers". Q: Is the check result normal? YES: Go to Step 2. NO: Operate the scan tool to set the option coding "Number of speaker" to "6 speakers", and check the trouble symptom.
2. STEP 2. Checking with audio speaker check Perform the audio speaker check, and check which speaker does not output the sound (Refer to «ON-VEHICLE SERVICE»(ref-592604-S17546460852014011000000) ). NOTE: In the following procedure, check the speaker or tweeter that is abnormal. Q: Is the check result normal? YES (normal for all): The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO (Either a speaker is abnormal): Go to Step 3.
3. STEP 3. Check door speaker connector E-13 , E-11 , E-23 or E-22 , or tweeter connector E-02 or E-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is door speaker connector E-13 , E-11 , E-23 or E-22 , or tweeter connector E-02 or E-04 in good condition? YES: Go to Step 4. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
4. STEP 4. Check the speaker or tweeter. Remove the speaker or tweeter (Refer to «SPEAKER TEST»(ref-592604-S24425650312014011000000) ). Check that the speaker or tweeter outputs the noise when the voltage of 5 V is applied to the speaker or tweeter connector terminal. Q: Does the speaker or tweeter output the noise? YES: Go to Step 5. NO: Replace the speaker or tweeter.
5. STEP 5. Check radio and CD player connector C-107 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is radio and CD player connector C-107 in good condition? YES: Go to Step 6. NO: Repair or replace the damaged component (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
6. STEP 6. Check the wiring harness between the speaker or tweeter connector terminal and the radio and CD player connector terminal. Check the communication lines for open circuit and short circuit. < Front door speaker (LH)> Check the wiring harness between front door speaker (LH) connector E-13 (terminal 1, 2) and radio and CD player connector C-107 (terminal 28, 38). NOTE: Also check intermediate connector C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-129 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Front door speaker (RH)> Check the wiring harness between front door speaker (RH) connector E-11 (terminal 1, 2) and radio and CD player connector C-107 (terminal 26, 36). NOTE: Also check intermediate connector C-117 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-117 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Rear door speaker (LH)> Check the wiring harness between rear door speaker (LH) connector E-23 (terminal 1, 2) and radio and CD player connector C-107 (terminal 27, 37). NOTE: Also check intermediate connectors D-24 and C-42 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-24 or C-42 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Rear door speaker (RH)> Check the wiring harness between rear door speaker (RH) connector E-22 (terminal 1, 2) and radio and CD player connector C-107 (terminal 25, 35). NOTE: Also check intermediate connectors C-23 and D-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-23 or D-01 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Tweeter (LH)> Check the wiring harness between tweeter (LH) connector E-02 (terminal 1, 2) and radio and CD player connector C-107 (terminal 38, 28). NOTE: Also check intermediate connector C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-129 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Tweeter (RH)> Check the wiring harness between tweeter (RH) connector E-04 (terminal 1, 2) and radio and CD player connector C-107 (terminal 36, 26). NOTE: Also check intermediate connector C-117 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-117 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between the speaker or tweeter connector terminal and the radio and CD player connector terminal in good condition? YES: Replace the radio and CD player. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) .

Scheme 71

Scheme 72

Scheme 73

If the sound is not heard from one of the speakers, the speaker, radio and CD player, audio amplifier, communication line from the radio and CD player to the audio amplifier, or communication line from the audio amplifier to the speaker may have a problem. Also, the option coding information may be inconsistent.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe
3. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

1. STEP 1. ETACS-ECU coding data check. Operate scan tool MB991958 to read the ETACS-ECU option coding information (Refer to «CODING TABLE»(ref-592586-S01387040712014011000000) ). Check that the "Number of speaker" is set to "Premium." Q: Is the check result normal? YES: Go to Step 2. NO: Operate scan tool MB991958 to set the option coding "Number of speaker" to "Premium," and check the trouble symptom.
2. STEP 2. Checking with speaker test Perform the speaker test, and check which speaker does not output the sound. Refer to «ON-VEHICLE SERVICE»(ref-592604-S17546460852014011000000) . NOTE: In the following procedure, check the speaker or tweeter that is abnormal. Q: Is the check result normal? YES (normal for all): The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO (Either a speaker is abnormal): Go to Step 3.
3. STEP 3. Check door speaker connector E-13 , E-11 , E-23 or E-22 , or tweeter connector E-02 or E-04 , or sub woofer connector F-26 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is door speaker connector E-13 , E-11 , E-23 or E-22 , or tweeter connector E-02 or E-04 , or sub woofer connector F-26 in good condition? YES: Go to Step 4. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
4. STEP 4. Check the speaker, tweeter or subwoofer. Remove the speaker, tweeter or subwoofer (Refer to «SPEAKER TEST»(ref-592604-S24425650312014011000000) ). Check that the speaker or tweeter outputs the noise when the voltage of 5 V is applied to the speaker or tweeter connector terminal. Check that the subwoofer outputs the noise when the voltage of 5 V is applied to the subwoofer connector terminal. Q: Is the check result normal? YES: Go to Step 5. NO: Replace the speaker, tweeter or subwoofer.
5. STEP 5. Check audio amplifier connector D-29 or D-30 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is audio amplifier connector D-29 or D-30 in good condition? YES: Go to Step 6. NO: Repair or replace the damaged component (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
6. STEP 6. Check the wiring harness between the speaker, tweeter or sub woofer connector terminal and the audio amplifier connector terminal. Check the communication lines for open circuit and short circuit. < Front door speaker (LH)> Check the wiring harness between front door speaker (LH) connector E-13 (terminal 1, 2) and audio amplifier connector D-29 (terminal 28, 38). NOTE: Also check intermediate connectors C-24 and C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 or C-129 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Front door speaker (RH)> Check the wiring harness between front door speaker (RH) connector E-11 (terminal 1, 2) and audio amplifier connector D-29 (terminal 27, 37). NOTE: Also check intermediate connectors C-24 and C-117 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 or C-117 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Rear door speaker (LH)> Check the wiring harness between rear door speaker (LH) connector E-23 (terminal 1, 2) and audio amplifier connector D-30 (terminal 1, 7). NOTE: Also check intermediate connector D-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-24 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Rear door speaker (RH)> Check the wiring harness between rear door speaker (RH) connector E-22 (terminal 1, 2) and audio amplifier connector D-30 (terminal 2, 8). NOTE: Also check intermediate connector D-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-01 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Tweeter (LH)> Check the wiring harness between tweeter (LH) connector E-02 (terminal 1, 2) and audio amplifier connector D-30 (terminal 14, 6). NOTE: Also check intermediate connectors C-24 and C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 or C-129 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Tweeter (RH)> Check the wiring harness between tweeter (RH) connector E-04 (terminal 1, 2) and audio amplifier connector D-30 (terminal 13, 5). NOTE: Also check intermediate connectors C-24 and C-117 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 or C-117 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . < Subwoofer> Check the wiring harness between subwoofer connector F-26 (terminal 1, 2, 3, 4) and audio amplifier connector D-29 (terminal No. 30, 22, 29, 21). NOTE: Also check intermediate connector D-16 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-16 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between the speaker, tweeter or sub woofer connector terminal and the audio amplifier connector terminal in good condition? YES : Go to Step 7. YES : Go to Step 9 . NO (harness wire is abnormal): Repair or replace the damaged component (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
7. STEP 7. Check radio and CD player connector C-107 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is radio and CD player connector C-107 in good condition? YES: Go to Step 8. NO: Repair or replace the damaged component (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
8. STEP 8. Check the harness wire between radio and CD player connector C-107 (terminal 26, 28, 36, 38) and audio amplifier connector D-30 (terminal 10, 4, 11, 12). Check the communication lines for open circuit and short circuit. NOTE: Also check intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between radio and CD player connector C-107 (terminal 26, 28, 36, 38) and audio amplifier connector D-30 (terminal 10, 4, 11, 12) in good condition? YES: Check the trouble symptom, go to Step 9. NO: Repair or replace the damaged component (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
9. STEP 9. Replace the audio amplifier temporarily, and check the trouble symptom. Replace the audio amplifier temporarily, and check that the sound is output from the speaker. Q: Is the check result normal? YES: Replace the audio amplifier. NO: Replace the radio and CD player.

Inspection Procedure 4: The Audio Does Not Operate Normally By Operating The Radio And CD Player Of The Center Panel Unit

When the audio does not operate normally by operating the audio control unit of the center panel unit, the radio and CD player, center panel unit, or the power supply circuit system of center panel unit may be faulty.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

Scheme 74

Scheme 75

1. STEP 1. Check center panel unit connector C-124 and radio and CD player connector C-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are center panel unit connector C-124 and radio and CD player connector C-109 in good condition? YES: Go to Step 2. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
2. STEP 2. Check the wiring harness between center panel unit connector C-124 (terminal 1, 2) and radio and CD player connector C-109 (terminal 8, 18). Check the communication lines for open circuit and short circuit. Q: Is the wiring harness between center panel unit connector C-124 (terminal 1, 2) and radio and CD player connector C-109 (terminal 8, 18) in good condition? YES: Go to Step 3. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
3. STEP 3. Check the ground circuit to the center panel unit. Measure the resistance at center panel unit connector C-124. Disconnect the connector, and measure at the wiring harness side. Measure resistance between terminal 9 and ground. OK: The resistance should be 2 ohm or less. Q: Is the measured resistance 2 ohms or less? YES: Go to Step 5 . NO: Go to Step 4.
4. STEP 4. Check the wiring harness between center panel unit connector C-124 (terminal 9) and ground. Check the ground wires for open circuit. Q: Is the wiring harness between center panel unit connector C-124 (terminal 9) and ground in good condition? YES: Check the trouble symptom. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
5. STEP 5. Check the power supply circuit to the center panel unit. Measure the voltage at center panel unit connector C-124. Disconnect the connector, and measure at the harness side connector. Measure voltage between terminal 7 and ground. OK: Battery positive voltage Q: Is the measured voltage battery voltage? YES: Go to Step 7 . NO: Go to Step 6.
6. STEP 6. Check the wiring harness between center panel unit connector C-124 (terminal 7) and fusible link 36. Check the power supply line for open circuit and short circuit. NOTE: Also ETACS-ECU connector C-307, C-317 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If joint connector ETACS-ECU connector C-307, C-317 are damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between center panel unit connector C-124 (terminal 7) and fusible link 36 in good condition? YES: Check the trouble symptom. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
7. STEP 7. Replace the center panel unit temporarily, and check the trouble symptom. Replace the center panel unit temporarily, and check that the audio works normally. Q: Is the check result normal? YES: Replace the center panel unit. NO: Replace the radio and CD player.

Inspection Procedure 5: Audio Illuminations Does Not Work Normally

Scheme 76

Scheme 77

The center panel unit, radio and CD player, combination meter, or communication line from the radio and CD player to the combination meter may have a problem.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

1. STEP 1. Operation check of the center panel unit Operate the audio control switch of the center panel unit, and check if the audio operates normally. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to «INSPECTION PROCEDURE 4 "THE AUDIO DOES NOT OPERATE NORMALLY BY OPERATING THE RADIO AND CD PLAYER OF THE CENTER PANEL UNIT."»(ref-592601-S29635338332014011000000) .
2. STEP 2. Check the combination meter. Check whether the combination meter works normally. Q: Is the check result normal? YES: Go to Step 3. NO: Diagnose the combination meter (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592598-S42095597642014011000000) ).
3. STEP 3. Using scan tool MB991958, read the combination meter diagnostic trouble code. Check again if the DTC is set to the combination meter. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT SCAN TOOL»(ref-592601-S37903206552014011000000) ". Turn the ignition switch to the "ON" position. Check for combination meter DTCs. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Diagnose the combination meter (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-592598-S42095597642014011000000) ). NO: Go to Step 4.
4. STEP 4. Check center panel unit connector C-124 and combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are center panel unit connector C-124 and combination meter connector C-04 in good condition? YES: Go to Step 5. NO: Repair the connector concerned.
5. STEP 5. Check the wiring harness between center panel unit connector C-124 (terminal 16) and combination meter connector C-04 (terminal 23). Check the power supply line for open circuit and short circuit. NOTE: Also check A/C control panel connector C-123 or heater control panel connector C-138 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If A/C control panel connector C-123 or heater control panel connector C-138 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Q: Is the wiring harness between center panel unit connector C-124 (terminal 16) and combination meter connector C-04 (terminal 23) in good condition? YES: Go to Step 6. NO: Repair the wiring harness.
6. STEP 6. Check A/C control panel connector C-123 or heater control panel connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is A/C control panel connector C-123 or heater control panel connector C-138 in good condition? YES: Go to Step 7. NO: Repair the connector concerned.
7. STEP 7. Check the wiring harness between A/C control panel connector C-123 or heater control panel connector (terminal 8) and combination meter connector C-04 (terminal 22). Check the wiring harness for open circuit and short circuit. Q: Is the wiring harness between A/C control panel connector C-123 or heater control panel connector (terminal 8) and combination meter connector C-04 (terminal 22) in good condition? YES: Go to Step 8. NO: Repair the wiring harness.
8. STEP 8. Check the wiring harness between A/C control panel connector C-123 or heater control panel connector (terminal 10) and center panel unit connector C-124 (terminal 10). Check the wiring harness for open circuit and short circuit. Q: Is the wiring harness between A/C control panel connector C-123 or heater control panel connector (terminal 10) and center panel unit connector C-124 (terminal 10) in good condition? YES: Go to Step 9. NO: Repair the wiring harness.
9. STEP 9. Check radio and CD player connector C-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is radio and CD player connector C-109 in good condition? YES: Go to Step 10. NO: Repair the connector concerned.
10. STEP 10. Check the wiring harness between center panel unit connector C-124 (terminal 4) and radio and CD player connector C-109 (terminal 9). Check the communication lines for open circuit and short circuit. Q: Is the wiring harness between center panel unit connector C-124 (terminal 4) and radio and CD player connector C-109 (terminal 9) in good condition? YES: Go to Step 11. NO: Repair the wiring harness.
11. STEP 11. Replace the A/C control panel connector or heater control panel connector temporarily, and check the trouble symptom. Replace the A/C control panel connector or heater control panel connector temporarily, and check that the audio illumination works normally. Q: Is the check result normal? YES: Replace the A/C control panel connector or heater control panel connector . NO: Go to Step 12.
12. STEP 12. Replace the center panel unit temporarily, and check the trouble symptom. Replace the center panel unit temporarily, and check that the audio illumination works normally. Q: Is the check result normal? YES: Replace the center panel unit. NO: Replace the radio and CD player.

Inspection Procedure 6: The Sound Of Audio Adapter's Input Are Not Played

Scheme 78

If the external input sound is not output, the radio and CD player, audio communication line of radio and CD player, or audio adapter may have a problem.

Required Special Tools

1. MB991223: Harness Set
2. MB992006: Extra Fine Probe

1. STEP 1. Check the Radio and CD player. Check that the Radio and CD player operates normally, and the sound is output. Q: Is the check result normal? YES: Go to Step 2. NO: Troubleshoot the radio and CD player (Refer to «TROUBLE SYMPTOM CHART»(ref-592601-S34363225362014011000000) ).
2. STEP 2. Check the external sound input mode. Check if the external sound input mode of the radio and CD player is set. Q: Is the check result normal? YES: Go to Step 3. NO: Set the external sound input mode.
3. STEP 3. Check the audio adapter.
4. Check if the audio adapter is normal. (Refer to «AUDIO ADAPTER INSPECTION»(ref-592601-S31993701012014011000000) ). Q: Is the check result normal? YES: Go to Step 4. NO: Replace the Audio adapter.
5. STEP 4. Check audio adapter connector C-125 and radio and CD player connector C-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are audio adapter connector C-125 and radio and CD player connector C-109 in good condition? YES: Go to Step 5. NO: Repair or replace the damaged component(s) (Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) ).
6. STEP 5. Check the wiring harness between audio adapter connector C-125 (terminal 5, 4, 6) and radio and CD player connector C-109 (terminal 14, 13, 4). Check the communication lines for open circuit and short circuit. Q: Is the wiring harness between audio adapter connector C-125 (terminal 5, 4, 6) and radio and CD player connector C-109 (terminal 14, 13, 4) in good condition? YES: Replace the audio adapter, and go to Step 6. NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
7. STEP 6. Retest the system. Check that the external input is normal. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-592586-S21436341472014011000000) ). NO: Replace the radio and CD player.

DIAGNOSTIC PROCEDURE

1. STEP 1. Check the noise when entering or near a particular structure (building, tunnel, mountain, etc). Q: Does the noise occur when entering or near a particular structure (building, tunnel, mountain, etc).? YES: Go to Step 3 . NO: Go to Step 2.
2. STEP 2. After taking the following measures to prevent the noise, check that no noise appears. Change to a different station with a stronger wave to boost resistance to interference. Suppress high tones to reduce noise. Q: Do the following measures eliminate the noise? YES: This diagnosis is complete. NO: Go to Step 4 .
3. STEP 3. Ask the owner about the state of the noise. Find out the following information from the owner. Place where the noise occurs. Locality conditions (valley, mountain, etc). Name and frequency of stations affected by noise Q: Which is the noise, vehicle noise or external noise? Vehicle noise: It may not be possible to prevent noise if the signal is weak. This diagnosis is complete. External noise: In almost all cases, prevention on the receiver side is impossible. Weak signals especially are susceptible to interference. Go to Step 4.
4. STEP 4. Check that there is no noise. Q: Does noise still exist? YES: If there is more noise than on radios in other vehicles, find out the noise condition and the name and frequency of the receiving stations from the owner, and consult with the radio manufacturer's service center. NO: Normal.

Scheme 79

Note. FM waves have the same properties as light, and can be deflected and blocked. FM signal reception is severely degraded in the shadow of obstructions such as buildings or mountains. An FM receiver will then only receive a reflected signal.

1. The signal becomes weak as the distance from the station's transmission antenna increases. The signal strength received depends on the signal strength of the transmitting station and intervening obstructions such as buildings and hills. Generally speaking, the area of good reception is approximately 12 - 15 mile (20 - 25 km) for stereo reception, and 19 - 25 mile (30 - 40 km) for monaural reception.
2. The signal will becomes weak when an area of shadow from the transmitting antenna (places where there are obstructions such as mountains or buildings between the station transmitter and the vehicle), and noise will appear.
3. If a direct signal hits the antenna at the same time as a signal reflected by obstructions such as mountains or buildings, interference of the two signals will generate noise. When moving, noise will appear each time the vehicle's antenna passes through this kind of obstructed area. The strength and interval of the noise varies according to the signal strength and the conditions of deflection.
4. Since FM stereo transmission and reception has a weaker field than monaural, it is often accompanied by a hissing noise. After taking measures to prevent the noise, check that no noise occurs. Change to a different station with a stronger wave to boost resistance to interference. Suppress high tones to reduce noise. If there is noise, the following causes can be considered. If due to vehicle noise: It may not be possible to prevent noise if the signal is weak. If due to external noise: In almost all cases, prevention on the receiver side is not possible. Weak signals especially are susceptible to interference. If there is more noise than on radios in other vehicles, find out the noise condition and the name and frequency of the receiving stations from the owner, and consult with the radio manufacturer's service center.

Inspection Procedure 9: Sound Mixed With Noise, Only At Night (AM)

The following factors can be considered as possible causes of noise appearing at night.

1. Factors due to signal conditions: Due to the fact that long-distance signals are more easily received at night, even stations that are received without problem during the day may experience interference in a general worsening of reception conditions. The weaker a station is the more susceptible it is to interference, and a change to different station or the appearance of a beating sound* may occur. NOTE: Beat sound*: Two signals close in frequency interfere with each other, creating a repetitious high-pitched sound. This sound is generated not only by sound signals but electrical waves as well.
2. Factors due to vehicles noise: Generator noise may be a cause.

1. STEP 1. Check that the noise is still obvious even when the lights are off. Q: Is the noise still obvious even when the lights are off? YES: Go to Step 2. NO: Go to Step 3 .
2. STEP 2. Check that the noise fades away by the following action. Tune to a station with a stronger wave. Q: Does noise still exist? YES: Consult the radio manufacturer's service center. NO: This diagnosis is complete.
3. STEP 3. Check that the noise fades away when the vehicle harness is moved away from the radio (if the harness is not in the proper position). Q: Does the noise fade away when the vehicle harness is moved any from the radio (If the harness is not in the proper position)? YES: Repair the wiring harness. NO: If there is more noise than other radios, consult the radio manufacturer's service center.

1. STEP 1. Check the state of the antenna. Check that there is no damage or crack in the roof antenna. Q: Is the check result normal? YES: Go to Step 2. NO: Repair or replace the roof antenna.
2. STEP 2. Check that the noise occurs when the engine is stopped or the engine is running. Q: Does noise occur when the engine is stopped or the engine is running? When the engine is stopped: Go to Step 3. When the engine is running: Check the vehicle's noise suppressor (Refer to «INSPECTION PROCEDURE 13»(ref-592601-S32560086742014011000000) ).
3. STEP 3. Check that the noise fades away by the following actions. Tune to a station with a stronger wave. Adjust the sound quality to suppress high tones. Q: Is the noise eliminated? YES: This diagnosis is complete. NO: Go to Step 4.
4. STEP 4. Check that the radio and CD player is correctly grounded The radio is connected to the ground with an assembling screw. Q: Is the radio correctly grounded? YES: Go to Step 5. NO: Assemble the radio and CD player into the vehicle.
5. STEP 5. Check the antenna plug is connected to the radio and CD player. Q: Is the antenna plug thoroughly connected to the radio and CD player? YES: Go to Step 7 . NO: Go to Step 6.
6. STEP 6. Check that the noise is eliminated when the antenna plug is properly attached. Q: Is the noise eliminated? YES: This diagnosis is complete. NO: Go to Step 7.
7. STEP 7. Check that the antenna is in good condition and is it properly mounted. Q: Is the antenna in good condition and is it properly mounted? YES: Consult the radio manufacturer's service center. NO: Repair or replace the roof antenna.

There is much noise only on AM. Due to differences in AM and FM systems, AM is more susceptible to noise interference.

1. STEP 1. Check which comes out more noise, AM or FM. Q: Which comes out more noise, AM or FM? AM: Go to Step 2. FM: Refer to «INSPECTION PROCEDURE 12»(ref-592601-S17418833462014011000000) .
2. STEP 2. Check that there is noise under the following state(s). A motorcycle was passing. The levin was flashing. A vehicle passed close by, but it appeared to be a vehicle generating a particularly large amount of noise radiation. Passed beneath a power line. Passed beneath a telephone line. Passed close by a signal generator. Passed close by some other sources of electrical noise. Passed under a bridge. Q: Is there noise in the above states? YES: Go to Step 4 . NO: Go to Step 3.
3. STEP 3. Continue to check for static; when static is detected, check for the conditions listed above. Q: Is there noise in the state described in Step 2 ? YES: Noise prevention on the radio side is difficult. If the problem is particularly worse than other radios, consult a service center. NO: Go to Step 4.
4. STEP 4. Compare it with the other radios. Q: Is the noise level worse than other radios? YES: Consult a service center. NO: If the noise level is roughly the same as other radios, there is no action to be taken.

1. STEP 1. Check the state of the antenna. Q: Is the antenna assembled? YES: Go to Step 2. NO: Assemble the antenna. Check that there is no noise.
2. STEP 2. Check the radio after adjusting it. Q: Readjust the radio. Is the noise eliminated? YES: Check that there is no noise. NO: Go to Step 3.
3. STEP 3. Check with several broad casting. NOTE: Multipath noise and fading noise: Because of the frequency of FM waves in extremely high, it is highly susceptible to effects from geological formations and buildings. These effects disrupt the broadcast signal and obstruct reception in several ways. Multipath noise This describes the echo that occurs when the broadcast signal is reflected by a large obstruction and enters the receiver with a slight time delay relative to the direct signal (repetitious buzzing). Fading noise This is a buzzing noise that occurs when the broadcast signal is disrupted by obstructing objects and the signal strength fluctuates intricately within a narrow range. Q: Is the problem station or location specific? YES: The effect of an electrical field condition (multipath noise, fading noise) could be the cause. Check that there is not noise. NO: Go to Step 4.
4. STEP 4. Check that noise appears when the radio switch is turned on while the vehicle is stopped. NOTE: Body static electricity from the shock absorber rubber bushings used to prevent vibration, tires, etc. occurs because of separation from the ground, causing a buzzing noise. There is no measures to discharge the static electricity of the vehicle body. Check that there is no noise. Q: Does noise appear when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station? YES: Go to Step 5. NO: It may be static electricity noise.
5. STEP 5. Verify that the radio is correctly grounded. The radio is connected to the ground with an assembling screw. Q: Is the radio correctly grounded? YES: Go to Step 6. NO: Tighten the screw securely. Check that there is no noise.
6. STEP 6. Check by replacing radio and CD player. Q: Do the other radio and CD player work normally? YES: Either repair or replace the original radio and CD player. Check that there is no noise. NO: Either repair or replace the antenna assembly. Check that there is no noise.

Scheme 80

1. STEP 1. Check the fit of the antenna. Q: Is the antenna base fitted securely? YES: Go to Step 2. NO: Install the antenna, and tighten the mounting nut (Refer to «REMOVAL AND INSTALLATION»(ref-592657-S40747864102014011000000) ). Check that there is no noise.
2. STEP 2. Check the fit of antenna feeder cable. Q: Is the antenna feeder cable fitted securely? YES: Go to Step 3. NO: Ensure that the antenna base and the radio and CD player are fitted securely. Check that there is no noise.
3. STEP 3. Check radio and CD player connector C-107, C-109 and amplifier connector D-29, D-30 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are radio and CD player connector C-107, C-109 and amplifier connector D-29, D-30 in good condition? YES: Go to Step 4. NO: Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-592584-S02750277482014011000000) . Check that there is no noise.
4. STEP 4. Check that noise appears when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station. NOTE: Body static electricity from the shock absorber rubber bushings used to prevent vibration, tires, etc. occurs because of separation from the ground, causing a buzzing noise. Since no measures can be taken to discharge the static electricity of the vehicle body. Check that there is no noise. Q: Does noise appear when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station? YES: Go to Step 5. NO: It may be static electricity noise.
5. STEP 5. Verify that the radio is correctly grounded. The radio is connected to the ground with an assembling screw. Q: Is the radio correctly grounded? YES: Go to Step 6. NO: Tighten the screw securely. Check that there is no noise.
6. STEP 6. Check by replacing radio and CD player. Q: Do the other radio and CD player work normally? YES: Either repair or replace the original radio and CD player. Check that there is no noise. NO: Either repair or replace the antenna assembly. Check that there is no noise.

NOISE DESCRIPTION CHART

Scheme 81

Use the Symptom Chart to diagnose the possible cause(s) of the noise. Noise is often created by the following factors

1. Traveling conditions of the vehicle
2. Terrain of area traveled through
3. Surrounding buildings
4. Signal conditions
5. Time period

If there are still problems with noise, even after performing inspection procedures 7 to 14, obtain information on the factors listed above. Determine whether the problem occurs on AM or FM, the station names, frequencies, etc. and contact the radio manufacturer's service center.

1. STEP 1. Check the state of the antenna. Check that there is no damage or crack in the roof antenna. Q: Is the check result normal? YES: Go to Step 2. NO: Repair or replace the roof antenna.
2. STEP 2. Check to see if inspections are taking place is an area exposed to special electric fields. Q: Are inspections taking place under special electric field conditions (underground garage, inside a building, etc).? YES: Go to Step 3. NO: Go to Step 4 .
3. STEP 3. Relocate and check. Automatically receive in a good reception area that is not exposed to special electric fields. Q: Is reception of the strongest radio frequency possible within the area? YES: This diagnosis is complete. NO: Go to Step 4.
4. STEP 4. Tune then check. Q: Did the sensitivity improve after tuning? YES: This diagnosis is complete. NO: Go to Step 5.
5. STEP 5. Check the antenna plug is connected to the radio and CD player. Q: Is the antenna plug thoroughly connected to the radio and CD player? YES: Go to Step 6. NO: Thoroughly the antenna plug connect to the radio and CD player.
6. STEP 6. Check by replacing the radio and CD player. Q: Are operations normal when using another radio and CD player? YES: Either repair or replace the new radio and CD player. NO: Repair or replace the roof antenna.

1. STEP 1. Check the state of the antenna. Check that there is no damage or crack in the roof antenna. Q: Is the check result normal? YES: Go to Step 2. NO: Repair or replace the roof antenna.
2. STEP 2. Check to see if inspections are taking place is an area exposed to special electric fields. Q: Are inspections taking place under special electric field conditions (underneath garage, inside a building, etc).? YES: Go to Step 3. NO: Go to Step 4 .
3. STEP 3. Relocate and check. Automatically receive in a good reception area that is not exposed to special electric fields. Q: Is reception of the strongest radio frequency possible within the area? YES: Move the vehicle to check the trouble symptom. NO: Go to Step 4.
4. STEP 4. Tune then check. Q: Did the sensitivity improve after tuning? YES: This diagnosis is complete. NO: Go to Step 5.
5. STEP 5. Check with several broadcasting stations. NOTE: Multipath noise and fading noise: Because the frequency of FM waves is extremely high, it is highly susceptible to effects from geological formations and buildings. These effects disrupt the broadcast signal and obstruct reception in several ways. Multipath noise This describes the echo that occurs when the broadcast signal is reflected by a large obstruction and enters the receiver with a slight time delay relative to the direct signal (repetitious buzzing). Fading noise This is a buzzing noise that occurs when the broadcast beam is disrupted by obstructing objects and the signal strength fluctuates intricately within a narrow range. Q: Is the abnormality in reception generated only within a certain range? YES: Check that a poor reception is resolved. NO: Go to Step 6.
6. STEP 6. Check the antenna plug connection to the radio and CD player. Q: Is the antenna plug thoroughly connected to the radio and CD player? YES: Go to Step 7. NO: Thoroughly connect the antenna plug and the radio and CD player.
7. STEP 7. Check by temporarily replacing the radio and CD player. Q: Does the other radio and CD player work normally? YES: Either repair or replace the radio and CD player. NO: Repair or replace the roof antenna.

1. STEP 1. Check the degree in which distortion is generated. Q: How much distortion is generated? Occasional distortion: Go to Step 2. Constant distortion: Go to Step 3 .
2. STEP 2. Check by the transmission antenna. Q: Is there distortion by the transmission antenna? YES: The input from the antenna is too big. NO: Go to Step 3.
3. STEP 3. Check how the speakers are setup. Q: Are any cords coming in contact with the paper cones of the speakers? YES: Move the cords so that they do not come in contact with the paper cones of the speaker. Check that a distortion is resolved. NO: Go to Step 4.
4. STEP 4. Check the speakers. Remove the speakers. Check to see if there is any ripping of the paper cones or any foreign obstacles in the paper cone. Q: Are the speakers normal? YES: Go to Step 5. NO: Repair or replace the speakers.
5. STEP 5. Check how the speakers are setup. Q: Check to see if the speakers are setup in a deformed manner. YES: Correct the way the speakers are setup so they are securely setup. NO: Repair or replace the radio and CD player.

1. STEP 1. Check with another broadcasting station. Q: Is there distortion when turning to another broadcasting station? YES: Go to Step 2. NO: The signal from that station is too weak.
2. STEP 2. Relocate the reception area and check. Q: When relocating the reception area does the distortion increase or decrease? YES: The cause may be multipath noise. NO: Repair or replace the radio and CD player. Check that a distortion is resolved.

1. STEP 1. Check the state of the antenna. Check that there is no damage or crack in the roof antenna. Q: Is the check result normal? YES: Go to Step 2. NO: Repair or replace the roof antenna.
2. STEP 2. Check the number of radio stations. Q: Are there sufficient numbers of radio stations within the area? YES: Go to Step 3. NO: Go to Step 4 .
3. STEP 3. Check the distance from the transmission antenna. Q: Is there a transmission antenna within a range of 2 miles? YES: Go to Step 5 . NO: Go to Step 4.
4. STEP 4. Check if there is any receivable radio station when there is no transmission antenna in the vicinity. Execute automatic selection and check to see that the strongest radio frequency is receivable within the area. Q: Is reception of the strongest radio frequency possible within the area? YES: There is no action to be taken. NO: Go to Step 5.
5. STEP 5. Check that there is no vehicle under special electric field condition. Q: Is the check result normal? YES: Go to Step 7 . NO: Go to Step 6.
6. STEP 6. Relocate and check. Automatically receive in a good reception area that is not exposed to special electric fields. Q: Is reception of the strongest radio frequency possible within the area? YES: There is no action to be taken. NO: Go to Step 7.
7. STEP 7. Check the antenna plug is connected to the radio and CD player. Q: Is the antenna plug thoroughly connected to the radio and CD player? YES: Repair or replace the radio and CD player. NO: Thoroughly connect the antenna plug and the radio and CD player.

The cause is probably a faulty the radio and CD player memory backup power supply system circuit.

Refer to INSPECTION PROCEDURE 1 .

1. STEP 1. Check that a CD has been already loaded. Q: Has a CD been already loaded? YES: Take out the CD (If the CD can not be ejected, refer to «INSPECTION PROCEDURE 26»(ref-592601-S37603622642014011000000) ). Check that a CD can be inserted. NO: Go to Step 2.
2. STEP 2. Check how a CD is inserted. Ensure that the ignition switch is at 'ACC' or 'ON'. NOTE: If you try to load a CD when the ignition switch is at the positions other than 'ACC' or 'ON,' the CD will not be inserted completely and then rejected. Q: If you try to load the CD, does the CD stops halfway and then rejected? YES: Refer to «INSPECTION PROCEDURE 26»(ref-592601-S37603622642014011000000) . NO: Go to Step 3.
3. STEP 3. Check after the CD is loaded. NOTE: Even though the CD is loaded, "ERROR 01, ERROR 02" sometimes displayed with the CD rejected because of vibration/shock or dew on the CD face or optical lens. Q: Though the CD is inserted completely, is "ERROR 01 or ERROR 02" displayed and the CD ejected? YES: Go to Step 4. NO: There is no action to be taken.
4. STEP 4. Check the CD. Check the CD for the conditions below: Is the CD loaded with its label facing down? Is the recorded face dirty or scratched? Is there dew on the recorded face? Q: Is the CD in good condition? YES: Go to Step 5. NO: The original CD is defective. Check that a CD can be inserted.
5. STEP 5. Check again using a normal CD, which is not dirty or scratched. Load another normal CD. Check that the CD player recognizes and play the CD. Q: When you substitute another normal CD, is the CD loaded correctly? YES: The original CD is defective. Check that a CD can be inserted. NO: Replace or repair the radio and CD player. Check that a CD can be inserted.

1. STEP 1. Check again using another CD, which is not dirty or scratched. Q: When you substitute another normal CD, is the CD played normally? YES: The original CD is defective. The radio and CD player should sound normally. NO: Go to Step 2.
2. STEP 2. Check power supply to the radio and CD player when the ignition switch is at "ACC" or "ON" position. Q: Is the radio and CD player energized when the ignition switch is turned to the "ACC" or "ON" position? YES: Replace the radio and CD player. The radio and CD player should sound normally. NO: Check the memory backup power supply circuit. Refer to «INSPECTION PROCEDURE 1»(ref-592601-S06338578642014011000000) .

1. STEP 1. Check the state in which the sound on the CD jumps. Q: Does the sound jump when the car is parked? YES: Go to Step 2. NO: Go to Step 4 .
2. STEP 2. Check the surface of the CD. Q: Are there any scratches or soiling on the CD? YES: The CD is defective if there are any scratches. Clean the CD surface if it is dirty. Check that a CD sound skip is resolved. NO: Go to Step 3.
3. STEP 3. Check when replacing with a CD that can be played normally without any scratches or soiling. Q: Does the CD play normally when replaced with a CD that is not scratched or dirty and can play normally? YES: Defective CD used. Check that a CD sound skip is resolved. NO: Go to Step 4.
4. STEP 4. Check by tapping the radio and CD player. NOTE: Check by using a known-good CD which is free from scratches, dirt or any other abnormality. Q: Does the sound jump when tapping the radio and CD player? YES: Securely mount the radio and CD player. Check that a CD sound skip is resolved. NO: Either replace the audio system or take the following measures if a servicing shop is nearby. Investigate in detail the conditions when the sound jumps while driving the car. Describe these conditions to the service shop for consultation. Either replace the audio according to the instructions of the service shop. Check that a CD sound skip is resolved.

Check to see that the CD can be played normally and that it is free of any scratches or soiling.

Replace with better sound quality CD.

Q: Is the sound quality better replacing the CD with a clean CD without any scratches that can be played?

1. YES: The CD is defective. The sound quality should return to normal.
2. NO: Replace the radio and CD player. The sound quality should return to normal.

Check the power of ignition switch "ACC".

Q: Does the radio and CD player power turn ON when the ignition switch is in the "ACC" or "ON" position?

1. YES: Either replace the radio and CD player. Check that a CD can be ejected normally.
2. NO: Check the memory backup power supply circuit. Refer to «INSPECTION PROCEDURE 1»(ref-592601-S06338578642014011000000) .