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Wireless Control Module (Wcm) - Lancer Evolution: Diagnosis Mitsubishi Lancer X

Communication Devices 47 illustrations ~18775 words

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to CONTENTS OF TROUBLESHOOTING .

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

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
CAUTIONTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
  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 M.U.T.-III 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: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A

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 "ETACS" 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".
  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: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
  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 2 .
  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

CAUTIONDuring diagnosis, a DTC associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) are set, erase them all.
Diagnostic trouble code numberDiagnostic item
B1731Engine control module communication timeout
B1761VIN code not programmed
B1A08Keyless/KOS key1 performance
B1A09Keyless/KOS key2 performance
B1A0AKeyless/KOS key3 performance
B1A0BKeyless/KOS key4 performance
B1A0CKeyless key 5 performance
B1A0DKeyless key 6 performance
B1A0EKeyless key 7 performance
B1A0FKeyless key 8 performance
B1A10Keyless/KOS key 1 low battery
B1A11Keyless/KOS key 2 low battery
B1A12Keyless/KOS key 3 low battery
B1A13Keyless/KOS key 4 low battery
B1A14Keyless key 5 low battery
B1A15Keyless key 6 low battery
B1A16Keyless key 7 low battery
B1A17Keyless key 8 low battery
B1A24Key ID not registered
B1A25Key ID unmatched
B1A28Engine control module authenticate error
B1A35Transponder read error
B2101IG SW start POS. circuit low
B2102IG SW start POS. circuit high
B2204Coding data mismatch
B2206VIN code mismatch
B2352Antenna fail
B2401Keyless/KOS key ID not register
B2415RA module power voltage
B2416ECU internal error
C1608EEPROM error
C1900No registration
C1901Vehicle speed information abnormality
C1910Transmitter low battery voltage abnormality 1
C1920Transmitter low battery voltage abnormality 2
C1930Transmitter low battery voltage abnormality 3
C1940Transmitter low battery voltage abnormality 4
C1911Reception abnormality 1
C1921Reception abnormality 2
C1931Reception abnormality 3
C1941Reception abnormality 4
C1913Acceleration sensor abnormality 1
C1923Acceleration sensor abnormality 2
C1933Acceleration sensor abnormality 3
C1943Acceleration sensor abnormality 4
C1914Pressure sensor abnormality 1
C1924Pressure sensor abnormality 2
C1934Pressure sensor abnormality 3
C1944Pressure sensor abnormality 4
C1912Tire inflation pressure warning 1
C1922Tire inflation pressure warning 2
C1932Tire inflation pressure warning 3
C1942Tire inflation pressure warning 4
C1915Transmitter OFF mode 1
C1925Transmitter OFF mode 2
C1935Transmitter OFF mode 3
C1945Transmitter OFF mode 4
U0019Bus off (CAN-B)
U0141ETACS-ECU CAN timeout
U0151SRS-ECU CAN timeout
U0154Occupant classification-ECU CAN timeout
U0155Combination meter CAN timeout
U0164A/C-ECU CAN timeout
U0184Audio CAN timeout
U0195Satellite radio tuner CAN timeout
U0197Hands free module CAN timeout
U0245Audio visual navigation unit CAN timeout
U1412Implausible vehicle speed signal received
U1415Coding not completed/Data fail
U1417Implausible coding data

DIAGNOSTIC TROUBLE CODE CHART

DTC SET CONDITION

WCM checks that the engine control module data has been received via the CAN bus lines, and if not, sets DTC No. B1731.

TROUBLESHOOTING HINTS

  1. Malfunction of CAN bus line
  2. Malfunction of WCM
  3. Malfunction of engine control module

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

Scheme 2

Scheme 2
Scheme 2
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, check for engine control module diagnostic trouble code. Check again if the DTC is set to the engine control module. Q: Is the DTC set? YES : Troubleshoot the MFI system (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289380-S08258481512008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). After registering the ID codes, go to Step 4. NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).
  4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 engine control module and record the VIN (Refer to «HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING»(ref-289379-S36619531652008063000000) ). NO : The procedure is complete.

WCM sets DTC B1761 when no VIN is recorded in it.

  1. VIN not programmed
  2. Malfunction of the WCM

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

Scheme 3

Scheme 3
Scheme 3
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Register the VIN and recheck the diagnostic trouble code. Register VIN in WCM [Refer to «HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING»(ref-289379-S36619531652008063000000) ] and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.

DTC B1A08: Keyless/KOS key1 performance; DTC B1A09: Keyless/KOS key2 performance; DTC B1A0A: Keyless/KOS key3 performance; DTC B1A0B: Keyless/KOS key4 performance; DTC B1A0C: Keyless key 5 performance; DTC B1A0D: Keyless key 6 performance; DTC B1A0E: Keyless key 7 performance; DTC B1A0F: Keyless key 8 performance

CAUTIONWhen replacing the ECU, always check that the communication circuit is normal.

The door locking/unlocking code is automatically updated every time the doors are locked (rolling code). WCM stores DTC B1A08, B1A09, B1A0A, B1A0B, B1A0C, B1A0D, B1A0E, or B1A0F when it receives wrong signal (rolling code out of synchronisation) from the transmitter.

  1. Rolling code out of synchronisation
  2. Malfunction of the transmitter
  3. Malfunction of the WCM
  1. STEP 1. Synchronise the rolling code and recheck the diagnostic trouble code. Synchronise the rolling code. Use either way to synchronise the rolling code: Push the transmitter switches twice or more. Resister the keyless ID (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) ). NOTE: *: Name of the signals to be registered. Recheck if the DTC is set. Erase the DTC. Push the lock switch or unlock switch of transmitter. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 2. NO : The diagnosis is complete.
  2. STEP 2. Check whether the diagnostic trouble code is reset. Replace the transmitter by which the DTC is set with a new one, register the key ID and the keyless ID (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .), and recheck if the DTC is set. Erase the DTC. Push the lock switch or unlock switch of transmitter. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The diagnosis is complete.

DTC B1A10: Keyless/KOS key 1 low battery; DTC B1A11: Keyless/KOS key 2 low battery; DTC B1A12: Keyless/KOS key 3 low battery; DTC B1A13: Keyless/KOS key 4 low battery; DTC B1A14: Keyless key 5 low battery; DTC B1A15: Keyless key 6 low battery; DTC B1A16: Keyless key 7 low battery; DTC B1A17: Keyless key 8 low battery

CAUTIONWhen replacing the ECU, always check that the communication circuit is normal.

WCM sets DTC B1A10, B1A11, B1A12, B1A13, B1A14, B1A15, B1A16, or B1A17 when it receives low battery voltage signal from the transmitter.

  1. Battery failure in the transmitter
  2. Malfunction of the transmitter
  3. Malfunction of WCM
  1. STEP 1. Replace the battery in the transmitter and recheck the diagnostic trouble code. Replace the battery in the transmitter by which the DTC is set with a new one, and recheck if the DTC is set (Refer to «TRANSMITTER»(ref-289390-S39767511362008063000000) ). Replace the battery in the transmitter by which the DTC is set. Use the transmitter to lock/unlock the doors. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 2. NO : The diagnosis is complete (Discharged battery).
  2. STEP 2. Replace the transmitter and recheck the diagnostic trouble code. Replace the transmitter by which the DTC is set with a new one, register the key ID and the keyless entry secret code (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .), and recheck if the DTC is set. Use the transmitter to lock/unlock the doors. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The diagnosis is complete.

DTC B1A24: Key ID not registered

CAUTIONWhen the DTC B1A24 is set, be sure to diagnose the CAN bus line. When replacing the ECU, always check that the communication circuit is normal.

WCM sets DTC B1A24 when the key ID was not registered in it.

  1. Key ID not registered
  2. Malfunction of the ignition key
  3. Malfunction of WCM

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

Scheme 4

Scheme 4
Scheme 4
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Register the key ID and recheck the diagnostic trouble code. Register the key ID of the ignition key (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.

DTC B1A25: Key ID unmatched

CAUTIONWhen the DTC B1A25 is set, be sure to diagnose the CAN bus line. When replacing the ECU, always check that the communication circuit is normal.

WCM sets DTC B1A25 when the received key ID is different from the one registered in it.

  1. Malfunction of the ignition key
  2. Accessory key not registered
  3. Accessory WCM not registered
  4. Key is registered to another vehicle
  5. Malfunction of WCM

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

Scheme 5

Scheme 5
Scheme 5
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Register the key ID and recheck the diagnostic trouble code. Register the key ID of the ignition key (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Replace the ignition key and recheck the diagnostic trouble code. Replace the ignition key by which the DTC is set with the other key, and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 4. NO : Go to Step 5 .
  4. STEP 4. Register the key ID and recheck the diagnostic trouble code. Register the key ID of the ignition key (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 5. NO : The procedure is complete.
  5. STEP 5. Replace the ignition key and recheck the diagnostic trouble code. Replace the ignition key with a new one, register the key ID and keyless ID of the new key, (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.

DTC B1A28: Engine control module authenticate error

CAUTIONWhen DTC B1A28 is set, be sure to diagnose the CAN bus line. When replacing the ECU, always check that the communication circuit is normal.

WCM sets DTC B1A28 when the ignition key certification result and the engine control module starting condition do not match.

  1. Malfunction of CAN bus line
  2. Malfunction of WCM
  3. Malfunction of engine control module
  4. VIN registered in engine control module unmatched

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

Scheme 6

Scheme 6
Scheme 6
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the engine control module diagnostic trouble code. Check again if the DTC is set to the engine control module. Q: Is the DTC set? YES : Troubleshoot the MFI system (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289380-S08258481512008063000000) ). NO : Go to Step 3.
  3. STEP 3. Using scan tool MB991958, read the diagnostic trouble code. Check if the DTC is set to the WCM. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is DTC B1761 or B2206 set other than B1A28? YES : Perform the troubleshooting for each DTC. Refer to «DTC B1761: VIN CODE NOT PROGRAMMED»(ref-289390-S20843422672008063000000) < B1761 > and «DTC B2206: VIN CODE MISMATCH»(ref-289390-S38240232282008063000000) < B2206 >. NO : Go to Step 4.
  4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 5. NO : The diagnosis is complete.
  5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace the engine control module and record VIN (Refer to «HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING»(ref-289379-S36619531652008063000000) ). NO : The procedure is complete.

DTC B1A35: Transponder read error

CAUTIONWhen DTC B1A35 is set, be sure to diagnose the CAN bus line. When replacing the ECU, always check that the communication circuit is normal.

WCM sets DTC B1A35 when it cannot receive data from the transponder.

  1. Malfunction of the ignition key
  2. Malfunction of WCM
  3. Interference of the key ID

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

Scheme 7

Scheme 7
Scheme 7
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Check the ignition key inserted in the key cylinder for interference. Q: Are there other ignition keys or anything that interferes with the communication (things that generate radio waves such as magnets or air-cleaning device that has a power plug) near the ignition key inserted in the key cylinder? YES : Move away or remove other ignition keys or anything that interferes with the communication, and 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 WCM. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 4. NO : The procedure is complete.
  4. STEP 4. Replace the ignition key and recheck the diagnostic trouble code. Replace the ignition key by which the DTC is set with the other key, and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 5. NO : Go to Step 6 .
  5. STEP 5. Register the key ID and recheck the diagnostic trouble code. Register the key ID of the ignition key (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Go to Step 6. NO : The procedure is complete.
  6. STEP 6. Replace the ignition key and recheck the diagnostic trouble code. Replace the ignition key by which the DTC is set with a new one, register the key ID of the new key, (refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.

Scheme 8

Scheme 8: DTC B2101: IG SW start POS. circuit low; DTC B2102: IG SW start POS. circuit high
Scheme 8: DTC B2101: IG SW start POS. circuit low; DTC B2102: IG SW start POS. circuit high

WCM sets DTC B2101 or B2102 when the actual state of the ignition switch and the ignition switch position information received from ETACS-ECU via CAN do not match.

  1. Malfunction of CAN bus line
  2. Malfunction of the WCM
  3. Malfunction of the ignition switch
  4. Damaged wiring harness and connectors
  5. Malfunction of ETACS-ECU

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

Scheme 9

Scheme 9
Scheme 9

Scheme 10

Scheme 10
Scheme 10
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Check ETACS-ECU connector C-317 and WCM connector C-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is ETACS-ECU connector C-317 and WCM connector C-07 in good condition? YES : Go to Step 3. NO : Repair the defective connector.
  3. STEP 3. Check the wiring harness between WCM connector C-07 (terminal No.9) and the ETACS-ECU connector C-317 (terminal No.5) for open circuit. Disconnect WCM connector C-07 and ETACS-ECU connector C-317, and check the wiring harness. Check the wiring harness between WCM connector C-07 (terminal No.9) and ETACS-ECU connector C-317 (terminal No.5) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between WCM connector C-07 (terminal No.9) and the ETACS-ECU connector C-317 (terminal No.5) in good condition? YES : Go to Step 4. NO : Repair the wiring harness between WCM connector C-07 (terminal No.9) and ETACS-ECU connector C-317 (terminal No.5).
  4. STEP 4. Using scan tool MB991958, check data list. Use the ETACS-ECU data list to check the signals related to the ignition voltage. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. ITEM NAME AND NORMAL CONDITION REFERENCE Item No. Item name Normal condition Item 254 IG voltage Battery voltage Q: Does scan tool MB991958 display the item "IG voltage" as normal condition? YES : Go to Step 5. NO : Diagnose the ETACS-ECU (Refer to «DIAGNOSIS»(ref-289392-S29242288832008063000000) ).
  5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

If the vehicle information data transmitted from the ETACS-ECU via the CAN bus lines is different from that registered in the WCM, the WCM sets the DTC No. B2204.

  1. Malfunction of WCM
  2. Malfunction of ETACS-ECU

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

Scheme 11

Scheme 11
Scheme 11
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code Check again if the DTC is set to the ETACS-ECU. Q: Is the DTC set? YES : Troubleshoot the ETACS (Refer to «DIAGNOSIS»(ref-289392-S29242288832008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

WCM sets DTC B2206 when VIN registered in it and VIN that has been transmitted on the CAN bus do not match.

  1. Malfunction of WCM
  2. VIN registered in engine control module unmatched
  3. WCM being registered to another vehicle

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. Check the VIN registered in the engine control module and the VIN of the vehicle. Check if the VIN registered in the engine control module matches with the VIN of the vehicle. On the system selection screen of the M.U.T.-III, select "MFI/GDI/Diesel". Select "Coding". Select "VIN Information". Compare with the VIN of the vehicle. Q: Does the VIN of the engine control module match with the VIN of the vehicle? YES : Go to Step 2. NO : Write the VIN to the engine control module. [Refer to «HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING»(ref-289379-S36619531652008063000000) ]. Record VIN and go to Step 2.
  2. STEP 2. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). After registering the ID codes, go to Step 3. NO : The procedure is complete.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. Turn the ignition switch to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace the engine control module and record the VIN [Refer to «HOW TO PERFORM VEHICLE IDENTIFICATION NUMBER (VIN) WRITING»(ref-289379-S36619531652008063000000) ]. NO : The procedure is complete.

WCM sets DTC B2352 when open or short circuit to the ground in the antenna is detected.

TROUBLESHOOTING HINT

Malfunction of WCM (Open circuit in antenna)

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

Recheck for diagnostic trouble code.

Check again if the DTC is set to the WCM.

CAUTIONTo prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
  1. Connect scan tool MB991958 to the data link connector. Erase the DTC.
  2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
  3. Check if DTC is set.
  4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace WCM and register the ID codes (Refer to ID CODES REGISTRATION JUDGMENT TABLE ).

NO : The procedure is complete.

If the keyless ID registered transmitter is not registered to the WCM, the WCM sets the DTC No. B2401.

  1. Malfunction of CAN bus line
  2. Failure of transmitter registration process
  3. Malfunction of WCM

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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Register the keyless ID and recheck the diagnostic trouble code. Register the keyless ID (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ), and recheck if the DTC is set. Erase the DTC. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.

Scheme 12

Scheme 12: DTC B2415: RA module power voltage
Scheme 12: DTC B2415: RA module power voltage

If an open circuit or short to ground occurs in the reciever antenna assembly, WCM sets DTC B2415.

  1. Malfunction of CAN bus line
  2. Malfunction of the reciever antenna assembly
  3. Malfunction of the WCM
  4. Damaged wiring harness and connectors

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

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17
  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 to the data link connector. 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-289394-S00148513732008063000000) ).
  2. STEP 2. Check reciever antenna assembly connector D-14 and WCM connector C-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is the reciever antenna assembly connector D-14 and WCM connector C-07 in good condition? YES : Go to Step 3. NO : Repair the defective connector.
  3. STEP 3. Check the wiring harness between the reciever antenna assembly connector D-14 (terminal Nos. 8, 12) and the WCM connector C-07 (terminal Nos. 8, 12) for open circuit. Disconnect reciever anntena assembly connector D-14 and WCM connector C-07, and check the wiring harness. Check the wiring harness between reciever anntena assembly connector D-14 (terminal No.8) and WCM connector C-07 (terminal No.8). OK: Continuity exists (2 ohms or less) Check the wiring harness between reciever anntena assembly connector D-14 (terminal No.12) and WCM connector C-07 (terminal No.12). OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between reciever antenna assembly connector D-14 (terminal Nos. 8, 12) and the WCM connector C-07 (terminal Nos. 8, 12) in good condition? YES : Go to Step 4. NO (reciever antenna assembly connector D-14 terminal No.8 - WCM connector C-07 terminal No.8.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.8) and WCM connector C-07 (terminal No.8). NO (reciever antenna assembly connector D-14 terminal No.12 - WCM connector C-07 terminal No.12.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.12) and WCM connector C-07 (terminal No.12).
  4. STEP 4. Check the wiring harness between the reciever antenna assembly connector D-14 (terminal Nos. 8, 12) and the ground for short circuit. Disconnect reciever anntena assembly connector D-14, and check the wiring harness. Check the wiring harness between reciever anntena assembly connector D-14 (terminal No.8) and ground OK: No continuity Check the wiring harness between reciever anntena assembly connector D-14 (terminal No.12) and ground OK: No continuity Q: Is the wiring harness between reciever antenna assembly connector D-14 (terminal Nos. 8, 12) and the ground in good condition? YES : Go to Step 5. NO (reciever antenna assembly connector D-14 terminal No.8 - ground.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.8) and the ground. NO (reciever antenna assembly connector D-14 terminal No.12 - ground.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.12) and the ground.
  5. STEP 5. Replace the reciever antenna assembly, and check whether the diagnostic trouble code is reset. Erase the DTC. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position. Check if the DTC is set. Q: Is the DTC set? YES : Replace WCM and register the ID codes (Refer to «ID CODE REGISTRATION NECESSITY JUDGMENT TABLE»(ref-289389-S15626519462008063000000) ). NO : The procedure is complete.

WCM sets DTC B2416 when it determines an abnormal status within itself.

Malfunction of WCM

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

Recheck for diagnostic trouble code.

Check again if the DTC is set to the WCM.

CAUTIONTo prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).
  1. Connect scan tool MB991958 to the data link connector.
  2. Erase the DTC.
  3. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
  4. Check if DTC is set.
  5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC set?

YES : Replace WCM and register the ID codes (Refer to ID CODES REGISTRATION JUDGMENT TABLE ).

NO : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

WCM incorporates EEPROM (nonvolatile memory), and that EEPROM stores the TPMS, WCM and immobilizer information. When the data in EEPROM is failed, this code is set.

The most likely causes for this DTC to set are

  1. Damaged wiring harness and connector
  2. Malfunction of WCM

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S13849121612008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code check Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1608 set? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .). Then go to Step 3. NO : The procedure is complete.
  3. STEP 3. Diagnostic trouble code check Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1608 set? YES : Start over at Step 1 . NO : The procedure is complete.

When the ID registration information of the TPMS transmitter is not stored in the WCM, and/or when the WCM is replaced with a new one, this code is set. If the ID registration mode is terminated forcibly or time-out after one or more TPMS transmitters are registered in the ID registration mode, the ID information in the WCM is erased, and this diagnostic trouble code is set.

The most likely causes for this DTC to set are

  1. Damaged wiring harness and connector
  2. Malfunction of TPMS transmitter
  3. Malfunction of WCM
  4. ID code registration failed.

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 2. NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S33335426272008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code check Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1900 set? YES : Register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .). Then go to Step 3. NO : The procedure is complete.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1900 reset? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .). Then start over at Step 1 . NO : The procedure is complete.

WCM receives the wheel speed information from ASC-ECU via the CAN-bus line. Although WCM receives the information that the wheel is not currently rotated from ASC-ECU, if the TPMS transmitter sends the information that the wheel is rotated, this code is set.

The most likely causes for this DTC to set are

  1. Damaged wiring harness and connector
  2. Malfunction of TPMS transmitter
  3. Malfunction of WCM
  4. Malfunction of ASC-ECU
  5. Malfunction of ETACS-ECU

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 3 . NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S27719724372008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1901 set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Check for other diagnostic trouble code. Check if the diagnostic trouble code is set from ASC-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289382-S30584379442008063000000) ). Q: Is the check result normal? YES : Go to Step 4. NO : Carry out the troubleshooting for ASC-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289382-S30584379442008063000000) ). Then go to Step 6 .
  4. STEP 4. Check for other diagnostic trouble code. Check if the diagnostic trouble code is set from ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289392-S29242288832008063000000) ). Q: Is the check result normal? YES : Go to Step 5. NO : Troubleshoot the set DTC (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289392-S29242288832008063000000) ). Then go to Step 6 .
  5. STEP 5. Check the TPMS transmitter acceleration. Check the acceleration value of each TPMS transmitter by the TPMS transmitter check function (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .). OK: Acceleration value: 5G or less Q: Is the check result OK? YES : Replace the WCM and register ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 6. NO : Replace the TPMS transmitter and register ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 6.
  6. STEP 6. Recheck for diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1901 set? YES : Start over at Step 1 . NO : The procedure is complete.

Scheme 18

Scheme 18: DTC C1910: Transmitter low battery voltage abnormality 1; DTC C1920: Transmitter low battery voltage
Scheme 18: DTC C1910: Transmitter low battery voltage abnormality 1; DTC C1920: Transmitter low battery voltage
CAUTIONIf there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to TROUBLE CODE DIAGNOSIS ).

The most likely causes for this DTC to set are

  1. Low battery that is incorporated into the TPMS transmitter
  2. Damaged wiring harness and connector
  3. Registered IDs unmatched
  4. Malfunction of reciever antenna assembly
  5. Malfunction of TPMS transmitter
  6. Malfunction of WCM

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

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20
Scheme 20

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22

Scheme 23

Scheme 23
Scheme 23

Scheme 24

Scheme 24
Scheme 24

Scheme 25

Scheme 25
Scheme 25

Scheme 26

Scheme 26
Scheme 26

Scheme 27

Scheme 27
Scheme 27

Scheme 28

Scheme 28
Scheme 28
  1. STEP 1. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Then go to Step 3 . NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S33335426272008063000000) ). Then go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Q: Is the DTC C1910, C1920, C1930, C1940, C1911, C1921, C1931 or C1941 set? YES (When DTC C1911, C1921, C1931 and C1941 are set) : Go to Step 3. YES (When DTC C1911, C1921, C1931 or C1941 is set) : Go to Step 7 . YES (When DTC C1910, C1920, C1930, C1940, C1911, C1921, C1931 and C1941 are set) : Replace all TPMS transmitters, and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO : The procedure is complete.
  3. STEP 3. Connector check: C-07 WCM connector, C-16 joint connector, C-41 intermediate connector, and D-14 reciever antenna assembly connector Q: Is the check result normal? YES : Go to Step 4. NO : Repair or replace the difective connector, and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 .
  4. STEP 4. Wiring harness check between C-07 WCM connector and D-14 reciever antenna assembly connector. Disconnect C-07 WCM connector and D-14 reciever antenna assembly connector. Measure at the connector side of the D-14 reciever antenna assembly. Measure the resistance between the D-14 reciever antenna assembly terminals. Terminal No.1 - body ground. Terminal No.3 - body ground. Terminal No.5 - body ground. Terminal No.8 - body ground. Terminal No.12 - body ground. OK: No continuity Q: Is the check result normal? YES : Go to Step 5. NO (terminal No.1 - body ground.) : The wiring harness between D-14 reciever antenna assembly connector terminal No.1 and C-07 WCM connector terminal No.1 is shorted to ground. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (terminal No.3 - body ground.) : The wiring harness between D-14 reciever antenna assembly connector terminal No.3 and C-07 WCM connector terminal No.3 is shorted to ground. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (terminal No.5 - body ground.) : The wiring harness between D-14 reciever antenna assembly connector terminal No.5 and C-07 WCM connector terminal No.5 is shorted to ground. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (terminal No.8 - body ground.) : The wiring harness between D-14 reciever antenna assembly connector terminal No.8 and C-07 WCM connector terminal No.8 is shorted to ground. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (terminal No.12 - body ground.) : The wiring harness between D-14 reciever antenna assembly connector terminal No.12 and C-07 WCM connector terminal No.12 is shorted to ground. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 .
  5. STEP 5. Wiring harness check between C-07 WCM connector and D-14 reciever antenna assembly connector. Disconnect C-07 WCM connector and D-14 reciever antenna assembly connector. Measure at the connector side of C-07 WCM connector and D-14 reciever antenna assembly connector. Measure the resistance between the terminals. C-07 WCM connector terminal No.1 - D-14 reciever antenna assembly connector terminal No.1. C-07 WCM connector terminal No.3 - D-14 reciever antenna assembly connector terminal No.3. C-07 WCM connector terminal No.5 - D-14 reciever antenna assembly connector terminal No.5. C-07 WCM connector terminal No.8 - D-14 reciever antenna assembly connector terminal No.8. C-07 WCM connector terminal No.12 - D-14 reciever antenna assembly connector terminal No.12. OK: Continuity exists (2 ohms or less) Q: Is the check result normal? YES : Go to Step 6. NO (C-07 WCM connector terminal No.1 - D-14 reciever antenna assembly connector terminal No.1.) : An open circuit is present in the wiring harness between C-07 WCM connector terminal No.1 and D-14 reciever antenna assembly connector terminal No.1. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (C-07 WCM connector terminal No.3 - D-14 reciever antenna assembly connector terminal No.3.) : An open circuit is present in the wiring harness between C-07 WCM connector terminal No.3 and D-14 reciever antenna assembly connector terminal No.3. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (C-07 WCM connector terminal No.5 - D-14 reciever antenna assembly connector terminal No.5.) : An open circuit is present in the wiring harness between C-07 WCM connector terminal No.5 and D-14 reciever antenna assembly connector terminal No.5. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (C-07 WCM connector terminal No.8 - D-14 reciever antenna assembly connector terminal No.8.) : An open circuit is present in the wiring harness between C-07 WCM connector terminal No.8 and D-14 reciever antenna assembly connector terminal No.8. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 . NO (C-07 WCM connector terminal No.12 - D-14 reciever antenna assembly connector terminal No.12.) : An open circuit is present in the wiring harness between C-07 WCM connector terminal No.12 and D-14 reciever antenna assembly connector terminal No.12. Repair the wiring harness and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 .
  6. STEP 6. reciever antenna assembly check Register the ID codes. If the ID codes can not be registered for all the four wheels, replace the reciever antenna assembly. Q: Is the ID registration completed? YES : Go to Step 8 . NO : Replace the reciever antenna assembly and register the ID codes again (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8 .
  7. STEP 7. Check for TPMS transmitter. Identify the TPMS transmitter which the DTC is set by TPMS transmitter check (Refer to «TPMS TRANSMITTER CHECK»(ref-289390-S38494106782008063000000) .) NOTE: The TPMS transmitter which cannot be checked may be faulty or the ID code may not be registered, thus do not replace it, but register the ID code. If the transmitter is faulty, it is replaced in the ID code registration process. Q: Are there any TPMS transmitters which are identified? YES : Among the checked TPMS transmitters, replace the TPMS transmitters to which the DTC is set, and then register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8. NO : Even when no transmitter is checked, register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 8.
  8. STEP 8. Diagnostic trouble code recheck after register the ID codes Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1911, C1921, C1931, C1941, C1914, C1924, C1934 or C1944 set? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then start over at Step 1 . NO : The procedure is complete.

The most likely causes for this DTC to set are

  1. Low battery that is incorporated into the TPMS transmitter
  2. Damaged wiring harness and connector
  3. Registered IDs unmatched
  4. Malfunction of TPMS transmitter
  5. Malfunction of WCM

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 3 . NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S33335426272008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Q: Is the DTC C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Check for TPMS transmitter. Identify the TPMS transmitter which the DTC is set by TPMS transmitter check (Refer to «ID CODES REGISTRATION PROCEDURES»(ref-289389-S05097965402008063000000) ). NOTE: The TPMS transmitter which cannot be checked may be faulty or the ID code may not be registered, thus do not replace it, but register the ID code. If the transmitter is faulty, it is replaced in the ID code registration process. Q: Are there any TPMS transmitters which are identified? YES : Among the checked TPMS transmitters, replace the TPMS transmitters to which the DTC is set. Then register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURES»(ref-289389-S05097965402008063000000) ). Then go to Step 4. NO : Even when no transmitter is checked, register the ID codes. (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 4.
  4. STEP 4. Diagnostic trouble code recheck after register the ID codes Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1913, C1923, C1933, C1943, C1914, C1924, C1934 or C1944 set? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then start over at Step 1 . NO : The procedure is complete.

When the tire pressure included in the signal from the TPMS transmitter is less than the specified value, WCM sets this code.

The most likely causes for this DTC to set are

  1. Drop of tire pressure
  2. Loose TPMS transmitter mounting nut
  3. Flat tire
  4. TPMS transmitter malfunction
  5. WCM malfunction
  6. CAN-bus line malfunction

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 3 . NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S27719724372008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Q: Is DTC C1912, C1922, C1932 or C1942 set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Tire check Check that there is no abnormality for the items below. Flat tire Cracked tire Air leak from valve Loose TPMS transmitter mounting nut (Refer to «TPMS TRANSMITTER»(ref-289390-S10665598282008063000000) ). Q: Is the check result normal? YES : Go to Step 4. NO : Repair or replace it. Then go to Step 4.
  4. STEP 4. Diagnostic trouble code check Turn the ignition switch to the "ON" position, and adjust the pressure to the recommended tire pressure. Check if the DTC is set. Q: Is DTC C1912, C1922, C1932 or C1942 set? YES : Go to Step 5. NO : The procedure is complete.
  5. STEP 5. Diagnostic trouble code check Drive the vehicle for five minutes. NOTE: Even within 5 minutes, if the TPMS warning light goes out, finish the driving and perform the operation (2). Check if the DTC is set. Q: Is DTC C1912, C1922, C1932 or C1942 set? YES : Go to Step 6. NO : The procedure is complete.
  6. STEP 6. Tire pressure check by M.U.T.-III Perform the transmitter check using the M.U.T.-III (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) ), and check the tire pressure values of all the wheels. Check the tire pressure of all the wheels using the tire pressure gauge. Compare the measured value (1) with (2). OK: 20 kPa (2.9 psi) or less NOTE: Do not replace the TPMS transmitter which cannot be checked. Q: Is the check result OK? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 9 . NO : Go to Step 7.
  7. STEP 7. Tire pressure check by M.U.T.-III Perform the transmitter check using the M.U.T.-III (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) ), and check the tire pressure values of all the wheels. Check the tire pressure of all the wheels using the tire pressure gauge. Compare the measured value (1) with (2). OK: 20 kPa (2.9 psi) or less Q: Is the check result OK? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 9 . NO : Replace the TPMS transmitter and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 8.
  8. STEP 8. Recheck for diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1912, C1922, C1932 or C1942 set? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 9. NO : The procedure is complete.
  9. STEP 9. Recheck for diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC C1912, C1922, C1932 or C1942 set? YES : Start over at Step 1 . NO : The procedure is complete.

When the TPMS transmitter(s) is in the OFF MODE, this code is set.

The most likely causes for this DTC to set are

  1. OFF mode cancellation not performed
  2. Damaged wiring harness and connector
  3. Malfunction of TPMS transmitter
  4. Malfunction of WCM

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 3 . NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S27719724372008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is DTC C1915, C1925, C1935 or C1945 set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Diagnostic trouble code check Drive the vehicle for five minutes. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are the all DTC C1915, C1925, C1935 and C1945 set? YES : Replace the TPMS transmitters of all the four wheels, and register ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then go to Step 4. NO : Register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 4.
  4. STEP 4. Diagnostic trouble code recheck after register the ID codes Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is DTC C1915, C1925, C1935 or C1945 set? YES : Replace the WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). Then start over at Step 1 . NO : The procedure is complete.

If the CAN-B circuit malfunctions, the WCM sets DTC U0019.

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. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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-289390-S07646497722008063000000) " . 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 : Go to Step 2. NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).
  2. STEP 2. Using scan tool MB991958, diagnose the CAN bus line. 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 : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-289394-S00148513732008063000000) ).

DIAGNOSTIC FUNCTION

If the signal from ETACS-ECU cannot be received, the WCM sets DTC U0141.

  1. Malfunction of CAN bus line
  2. Malfunction of WCM
  3. Malfunction of ETACS-ECU

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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check again if the DTC is set to the ETACS-ECU. Q: Is the DTC set? YES : Diagnose the ETACS-ECU (Refer to «DIAGNOSE»(ref-289392-S29242288832008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

If no signal from SRS-ECU can be received, WCM sets diagnostic trouble code U0151.

  1. The CAN bus line may be defective
  2. The SRS-ECU may be defective
  3. Malfunction of WCM

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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  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-289381-S07916072172008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

When the signals from occupant classification-ECU cannot be received, the WCM sets DTC U0154.

  1. The CAN bus line may be defective.
  2. The WCM 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: 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the SRS-ECU diagnostic trouble code. Check if DTC is set to the SRS-ECU. Q: Is the DTC set? YES : Troubleshoot the SRS (Refer to «DIAGNOSIS»(ref-289381-S07736699152008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

TROUBLE JUDGMENT

If no signal from the combination meter can be received, WCM sets DTC U0155.

  1. Malfunction of CAN bus line
  2. Combination meter malfunction
  3. Malfunction of WCM

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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code. Check if DTC is set to the combination meter. Q: Is the DTC set? YES : Troubleshoot the combination meter (Refer to «DIAGNOSIS»(ref-289392-S41492033182008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). 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 WCM. (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

If the signal from A/C-ECU cannot be received, the WCM sets DTC U0164.

  1. The CAN bus line may be defective.
  2. The A/C-ECU may be defective.
  3. The WCM 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 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the A/C diagnostic trouble code Check if DTC is set to the A/C-ECU. Q: Is the DTC set? YES : Troubleshoot the A/C (Refer to «A/C DIAGNOSIS»(ref-289396-S21967014142008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

When the signals from radio and CD player or CD changer cannot be received, the WCM sets DTC U0184.

  1. The CAN bus line may be defective.
  2. The WCM may be defective.
  3. The radio and CD player or CD changer 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. 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the audio diagnostic trouble code. Check again if the DTC is set to the audio. Q: Is the DTC set? YES : Troubleshoot the radio and CD player (Refer to «RADIO AND CD PLAYER, DIAGNOSIS < RADIO AND CD PLAYER >»(ref-289392-S39224109232008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

If the signal from satellite radio tuner cannot be received, the WCM sets DTC U0195.

  1. The satellite radio tuner may be defective.
  2. The WCM may be defective.
  3. The CAN bus 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. 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the satellite radio tuner diagnostic trouble code. Check if DTC is set to the satellite radio tuner. Q: Is the DTC set? YES : Troubleshoot the satellite radio. (Refer to «DIAGNOSIS»(ref-289392-S13234549042008063000000) < Satellite radio tuner >). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). 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 WCM. (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

When the signals from hands free module cannot be received, the WCM sets DTC U0197.

  1. The CAN bus line may be defective.
  2. The WCM may be defective.
  3. The hands free module 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. 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the hands free module diagnostic trouble code. Check again if the DTC is set to the hands free module. Q: Is the DTC set? YES : Troubleshoot the hands-free cellular phone system (Refer to «DIAGNOSIS»(ref-289392-S15569862592008063000000) < hands-free cellular phone system >). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) .) NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

When the signals from audio visual navigation unit cannot be received, the WCM sets DTC U0245.

  1. The CAN bus line may be defective.
  2. The WCM may be defective.
  3. The audio visual navigation unit 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 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the audio visual navigation unit diagnostic trouble code. Check if DTC is set to the audio visual navigation unit. Q: Is the DTC set? YES : Troubleshoot the MMCS (Refer to «DIAGNOSIS < MMCS >»(ref-289392-S24584668752008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

WCM receives the wheel speed information from ASC-ECU via the CAN-bus line. If WCM cannot receive the information about the wheel speed sensor from ASC-ECU, this code is set.

The most likely causes for this DTC to set are

  1. Damaged wiring harness and connector
  2. Malfunction of ASC-ECU
  3. Malfunction of WCM
  4. Malfunction of ETACS-ECU

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. M.U.T.-III CAN bus diagnostics Use scan tool to diagnose the CAN bus lines. Q: Is the check result normal? YES : Go to Step 3. NO : Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTICS TABLE»(ref-289394-S33335426272008063000000) ). On completion, go to Step 2.
  2. STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC U1412 set? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Vehicle speed check by combination meter During the vehicle driving, check that the correct vehicle speed is displayed on the combination meter. Q: Is the check result normal? YES : Replace the WCM and register ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) Then go to Step 6 . NO : Go to Step 4.
  4. STEP 4. Check for other diagnostic trouble code. Check if the diagnostic trouble code is set from ASC-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289382-S30584379442008063000000) ). Q: Is the check result normal? YES : Go to Step 5. NO : Carry out the relevant troubleshooting. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289382-S30584379442008063000000) ). Then go to Step 5.
  5. STEP 5. Check for other diagnostic trouble code. Check if the diagnostic trouble code is set from ETACS-ECU (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289392-S29242288832008063000000) ). Q: Is the check result normal? YES : Diagnose the combination meter. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289392-S41492033182008063000000) ) Go to Step 6. NO : Carry out the relevant troubleshooting. (Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289392-S29242288832008063000000) ). Then go to Step 6.
  6. STEP 6. Recheck for diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC U1412 set? YES : Start over at Step 1 . NO : The procedure is complete.

If the vehicle information data is not registered to the combination meter, the WCM sets DTC U1415.

  1. The CAN bus line may be defective.
  2. The WCM may be defective.
  3. The ETACS-ECU 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. 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. Check if DTC is set to the ETACS-ECU. Q: Is the DTC set? YES : Troubleshoot the ETACS-ECU (Refer to «DIAGNOSIS»(ref-289392-S29242288832008063000000) ). NO : Go to Step 3.
  3. STEP 3. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

DTC SET CONDITIONS

WCM communicates with ETACS-ECU via CAN bus lines. This diagnostic trouble code is set when the vehicle information received from the ETACS-ECU is invalid.

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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, check for other system diagnostic trouble code. Check if DTC is set to the ETACS-ECU or engine control module. Q: Is the DTC set? YES (DTC is set to ETACS-ECU.) : Troubleshoot the ETACS (Refer to «DIAGNOSIS»(ref-289392-S29242288832008063000000) ). YES (DTC is set to the engine control module.) : Troubleshoot the MFI system (Refer to «DIAGNOSIS»(ref-289380-S08258481512008063000000) ). NO : Go to Step 3.
  3. STEP 3. Check part number of ETACS-ECU Check the part number of ETACS-ECU. OK: 8637A313 Q: Is the check result normal? YES : Go to Step 4. NO : Replace ETACS-ECU.
  4. STEP 4. Check part number of WCM Check the part number of WCM. OK: MN141352 Q: Is the check result normal? YES : Go to Step 5. NO : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).
  5. STEP 5. Recheck for diagnostic trouble code. Check again if the DTC is set to the WCM. 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 WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ).

TROUBLE SYMPTOM CHART

CAUTIONDuring diagnosis, a DTC associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, check all systems for DTC(s). If DTC(s) are set, erase them all.
Trouble symptomReference page
Scan tool cannot communicate with WCM.INSPECTION PROCEDURE 1: SCAN TOOL CANNOT COMMUNICATE WITH WCM.
The ignition key cannot be registered using scan tool.INSPECTION PROCEDURE 2: THE IGNITION KEY CANNOT BE REGISTERED USING SCAN TOOL.
Engine does not start (cranking but no initial combustion).INSPECTION PROCEDURE 3: ENGINE DOES NOT START (CRANKING BUT NO INITIAL COMBUSTION).
Abnormality in WCM power supply and ground circuits.INSPECTION PROCEDURE 4: ABNORMALITY IN WCM POWER SUPPLY AND GROUND CIRCUITS.
Keyless entry system does not work.INSPECTION PROCEDURE 5: KEYLESS ENTRY SYSTEM DOES NOT WORK.
Keyless entry hazard light answerback function, the dome light answerback function or the horn answerback function does not work normally.INSPECTION PROCEDURE 6: KEYLESS ENTRY HAZARD LIGHT ANSWERBACK FUNCTION, THE DOME LIGHT ANSWERBACK FUNCTION OR THE HORN ANSWERBACK FUNCTION DOES NOT WORK NORMALLY.
The timer lock function does not work after doors have been unlocked by the keyless entry system.INSPECTION PROCEDURE 7: THE TIMER LOCK FUNCTION DOES NOT WORK AFTER THE DOORS HAVE BEEN UNLOCKED BY THE KEYLESS ENTRY SYSTEM.
The trunk is not opened when the keyless entry transmitter "TRUNK" button is operated.INSPECTION PROCEDURE 8: THE TRUNK IS NOT OPENED WHEN THE KEYLESS ENTRY TRANSMITTER "TRUNK" BUTTON IS OPERATED.

TROUBLE SYMPTOM CHART

Inspection Procedure 1: Scan tool cannot communicate with WCM

CAUTIONBefore replacing the ECU, ensure that the communication circuit is normal.
  1. Malfunction of the power supply or ground of WCM
  2. Malfunction of CAN bus line
  3. Malfunction of WCM

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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Check the power supply circuit and the ground circuit to WCM. Refer to " «INSPECTION PROCEDURE 4: ABNORMALITY IN WCM POWER SUPPLY AND GROUND CIRCUITS.»(ref-289390-S20057108732008063000000) " . Q: Is the power supply circuit and the ground circuit to WCM in good condition? YES : Go to Step 3. NO : Repair the power supply circuit and the ground circuit to WCM.
  3. STEP 3. Retest the system Check if scan tool can communicate with WCM. Q: Does the scan tool communicate with WCM? YES : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).
  1. Malfunction of the ignition key
  2. Damaged wiring harness and connectors
  3. Malfunction of WCM
  4. Ignition key registered for other vehicle

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. Check the ignition key inserted in the key cylinder for interference. Q: Are there other ignition keys or anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the ignition key inserted in the key cylinder? YES : Move away or remove other ignition keys or things that interfere with the communication (things that generate radio waves such as magnets and a air-cleaning device that has a power plug) near the ignition key. Then, go to step 2. NO : Go to Step 3 .
  2. STEP 2. Retest the system Check that the ignition key can be registered. Q: Is the ignition key that cannot be registered using scan tool? YES : Go to Step 3. NO : The procedure is complete.
  3. STEP 3. Check which ignition key cannot be registered. Q: Can any one of the ignition keys be registered? YES (Only some keys) : Replace the key that cannot be registered and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). After registering the ID codes, go to Step 5 . NO (All keys) : Go to Step 4.
  4. STEP 4. Retest the system Check the scan tool screen when the key was not able to be registered. Q: Is the error message of scan tool screen "Abnormality in key" ? YES (Abnormality in key) : Carry out DTC B1A25: Key ID unmatched and DTC B1A35: Transponder read error (Refer to «DTC B1A25: KEY ID UNMATCHED»(ref-289390-S33991985892008063000000) < B1A25 >, «DTC B1A35: TRANSPONDER READ ERROR»(ref-289390-S00124705292008063000000) < B1A35 >). Then, go to Step 5. NO (ECU internal error) : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).
  5. STEP 5. Retest the system Check that the ignition key can be registered. Q: Is the ignition key that cannot be registered using scan tool? YES : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ). NO : The procedure is complete.
  1. Malfunction of battery
  2. Malfunction of the MFI system
  3. Malfunction of WCM
  4. Malfunction of CAN bus line
  5. Malfunction of the transponder
  6. VIN not programmed

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. Check the battery voltage. Measure the battery voltage when cranking. The voltage should measure 8 volt or more. Q: Is the measured voltage 8 volt or more? YES : Go to Step 2. NO : Check the battery (Refer to «BATTERY TEST»(ref-289392-S10169341972008063000000) ).
  2. STEP 2. 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-289390-S07646497722008063000000) " . 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 3. NO : Repair the CAN bus line (Refer to «DIAGNOSIS»(ref-289394-S00148513732008063000000) ).
  3. STEP 3. Using scan tool MB991958, check for MFI system diagnostic trouble code. Check if DTC is set to the engine control module. Q: Is the DTC set? YES : Troubleshoot the MFI system (Refer to «DIAGNOSIS»(ref-289380-S08258481512008063000000) ). NO : Go to Step 4.
  4. STEP 4. Using scan tool MB991958, check for WCM diagnostic trouble code. Check if DTC is set to the WCM. Q: Is the DTC set? YES : Troubleshoot the WCM (Refer to «STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING»(ref-289390-S23659296282008063000000) ). NO : Go to Step 5.
  5. STEP 5. Check that the engine starts. Q: Does the engine start? YES : The procedure is complete. NO : Refer to «DIAGNOSIS»(ref-289380-S08258481512008063000000) . When the cause of the failure cannot be tracked down by the troubleshooting, replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).

Inspection Procedure 4: Abnormality in WCM power supply and ground circuits

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 29

Scheme 29
Scheme 29
  1. Damaged wiring harness and connectors
  2. Malfunction of the WCM

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set

Scheme 30

Scheme 30
Scheme 30

Scheme 31

Scheme 31
Scheme 31

Scheme 32

Scheme 32
Scheme 32
  1. STEP 1. Check WCM connector C-07 and ETACS-ECU connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is the WCM connector C-07 and ETACS-ECU connector C-317 in good condition? YES : Go to Step 2. NO : Repair the defective connector.
  2. STEP 2. Check the wiring harness between WCM connector C-07 (terminal No.6, 9) and the ETACS-ECU connector C-317 (terminal No.10, 5) for open circuit. Disconnect WCM connector C-07 and ETACS-ECU connector C-317, and check the wiring harness. Check the wiring harness between WCM connector C-07 (terminal No.6) and ETACS-ECU connector C-317 (terminal No.10) OK: Continuity exists (2 ohms or less) Check the wiring harness between WCM connector C-07 (terminal No.9) and ETACS-ECU connector C-317 (terminal No.5) OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between WCM connector C-07 and the ETACS-ECU connector C-317 in good condition? YES : Go to Step 3. NO : Repair the wiring harness between WCM connector C-07 (terminal No.6, 9) and ETACS-ECU connector C-317 (termuinal No.10, 5).
  3. STEP 3. Check the wiring harness between the WCM connector C-07 (terminal No.7) and the ground for open circuit. Disconnect WCM connector C-07, and check the wiring harness. Check the wiring harness between WCM connector C-07 (terminal No.7) and ground. OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between WCM connector C-07 and the ground in good condition? YES : Go to Step 4. NO : Repair the wiring harness between WCM connector C-07 (terminal No.7) and ground.
  4. STEP 4. Retest the system Q: Does the abnormality in WCM power supply and ground circuits in good condition? YES : The trouble can be an intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).

Inspection Procedure 5: Keyless entry system does not work

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 33

Scheme 33
Scheme 33
  1. The CAN bus line may be defective
  2. The key reminder switch may be defective
  3. The door switches may be defective
  4. The keyless entry transmitter may be defective
  5. The reciever antenna assembly may be defective
  6. The WCM may be defective
  7. The ETACS-ECU may be defective
  8. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  9. Option coding information

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. 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

Scheme 34

Scheme 34
Scheme 34

Scheme 35

Scheme 35
Scheme 35

Scheme 36

Scheme 36
Scheme 36

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38

Scheme 39

Scheme 39
Scheme 39
  1. STEP 1. Using scan tool MB991958, check for CAN bus the diagnostic trouble code. 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-289390-S07646497722008063000000) " . 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-289394-S00148513732008063000000) ).
  2. STEP 2. Using scan tool MB991958, read the diagnostic trouble code. 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-289390-S07646497722008063000000) " . Turn the ignition switch to the "ON" position. Check whether the WCM related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES : Diagnose the WCM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289390-S05350514502008063000000) . NO : Go to Step 3.
  3. STEP 3. Check the power supply system With the ignition switch in the LOCK (OFF) position, check if the following function operates normally: Headlights Hazard warning light Q: Is the check result normal? YES : Go to Step 4. NO : Refer to «MALFUNCTION OF ETACS-ECU POWER SUPPLY CIRCUIT»(ref-289392-S39748373222008063000000) .
  4. STEP 4. Verify the central door locking system. Check that the central door locking system works normally. Q: Is the check result normal? YES : Go to Step 5. NO : Refer to «TROUBLESHOOTING»(ref-289409-S02206540902008063000000) .
  5. STEP 5. Using scan tool MB991958, check data list. Check the signals related to the keyless entry system operation. 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-289390-S07646497722008063000000) " . Turn the ignition switch to the "LOCK" (OFF) position. Check the ETACS data list. Close the driver's door. Close the passenger's door. Close the RH-side rear door. Close the LH-side rear door. Close the trunk lid. Remove the ignition key from the ignition key cylinder. ITEM NAME AND NORMAL CONDITION REFERENCE Item No. Item name Normal condition Item 256 Dr door ajar switch Close Item 257 As door ajar switch Close Item 258 RR door ajar switch Close Item 259 RL door ajar switch Close Item 260 Trunk/gate trunk ajar switch Close Item 264 Handle lock switch Key in --> Key out OK: Normal condition are displayed. Q: Are the check result normal? YES < Normal conditions are displayed for all the items. > : Go to Step 6. NO < Normal condition is not displayed for item No. 256. > : Refer to «INSPECTION PROCEDURE 5: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE FRONT DOOR SWITCH (LH)»(ref-289392-S20622045972008063000000) . NO < Normal condition is not displayed for item No. 257. > : Refer to «INSPECTION PROCEDURE 6: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE FRONT DOOR SWITCH (RH)»(ref-289392-S09465174222008063000000) . NO < Normal condition is not displayed for item No. 258. > : Refer to «INSPECTION PROCEDURE 8: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE REAR DOOR SWITCH (RH)»(ref-289392-S25170329322008063000000) . NO < Normal condition is not displayed for item No. 260. > : Refer to «INSPECTION PROCEDURE 9: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE TRUNK LID LATCH.»(ref-289392-S18165794202008063000000) . NO < Normal condition is not displayed for item No. 264. > : Refer to «INSPECTION PROCEDURE 3: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE KEY REMINDER SWITCH.»(ref-289392-S13811099242008063000000) .
  6. STEP 6. Using scan tool MB991958, check pulse check. Check the signals related to the keyless entry system operation. 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-289390-S07646497722008063000000) " . Confirm the ETACS pulse check. Remove the ignition key from the ignition key cylinder. TRANSMITTER SWITCH CONDITIONS Item name Conditions Transmitter switch Turn the switch ON/OFF. OK: The scan tool (M.U.T.-III) tone alarm sounds. Q: Is the check result normal? YES : Go to Step 7. NO : Refer to " «SIGNALS FROM TRANSMITTER SWITCHES ARE NOT RECEIVED.»(ref-289390-S30107278752008063000000) " .
  7. STEP 7. Check reciever antenna assembly connector D-14 and WCM connector C-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is the reciever antenna assembly connector D-14 and WCM connector C-07 in good condition? YES : Go to Step 8. NO : Repair the defective connector.
  8. STEP 8. Check the wiring harness between the reciever antenna assembly connector D-14 (terminal Nos. 1, 3 and 5) and the WCM connector C-07 (terminal Nos. 1, 3 and 5) for open circuit. Disconnect reciever antenna assembly connector D-14 and WCM connector C-07, and check the wiring harness. Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.1) and WCM connector C-07 (terminal No.1). OK: Continuity exists (2 ohms or less) Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.3) and WCM connector C-07 (terminal No.3). OK: Continuity exists (2 ohms or less) Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.5) and WCM connector C-07 (terminal No.5). OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between reciever antenna assembly connector D-14 (terminal Nos. 1, 3 and 5) and the WCM connector C-07 (terminal Nos. 1, 3 and 5) in good condition? YES : Go to Step 9. NO (reciever antenna assembly connector D-14 terminal No.1 - WCM connector C-07 terminal No.1.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.1) and WCM connector C-07 (terminal No.1). NO (reciever antenna assembly connector D-14 terminal No.3 - WCM connector C-07 terminal No.3.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.3) and WCM connector C-07 (terminal No.3). NO (reciever antenna assembly connector D-14 terminal No.5 - WCM connector C-07 terminal No.5.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.5) and WCM connector C-07 (terminal No.5).
  9. STEP 9. Check the wiring harness between the reciever antenna assembly connector D-14 (terminal Nos. 1, 3 and 5) and the ground for short circuit. Disconnect reciever antenna assembly connector D-14, and check the wiring harness. Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.1) and ground OK: No continuity Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.3) and ground OK: No continuity Check the wiring harness between reciever antenna assembly connector D-14 (terminal No.5) and ground OK: No continuity Q: Is the wiring harness between reciever antenna assembly connector D-14 (terminal Nos. 1, 3 and 5) and the ground in good condition? YES : Go to Step 10. NO (reciever antenna assembly connector D-14 terminal No.1 - ground.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.1) and the ground. NO (reciever antenna assembly connector D-14 terminal No.3 - ground.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.3) and the ground. NO (reciever antenna assembly connector D-14 terminal No.5 - ground.) : Repair the wiring harness between reciever antenna assembly connector D-14 (terminal No.5) and the ground.
  10. STEP 10. Retest the system. Replace the reciever antenna assembly. Check if the keyless entry system works normally. Q: Is the check result normal? YES : Intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION JUDGMENT TABLE»(ref-289390-S00543095272008063000000) ).

Inspection Procedure 6: Keyless entry hazard light answerback function, the dome light answerback function or the horn answerback function does not work normally

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. The turn signal lights may be defective
  2. The dome light may be defective
  3. The horn may be defective
  4. The ETACS-ECU may be defective
  5. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  1. STEP 1. Verify the operation hazard warning light. Check that the hazard warning light illuminate normally. Q: Is the check result normal? YES : Go to Step 2. NO : Refer to «INSPECTION PROCEDURE 1: "HAZARD WARNING LIGHT DOES NOT ILLUMINATE»(ref-289392-S29564410392008063000000) ".
  2. STEP 2. Verify the operation of the dome light. Check that the dome lights illuminate normally. Q: Is the check result normal? YES : Go to Step 3. NO : Refer to «INSPECTION PROCEDURE 1 "THE FRONT DOME LIGHT DOES NOT ILLUMINATE NORMALLY»(ref-289392-S37526087892008063000000) ." or «INSPECTION PROCEDURE 2 "THE REAR DOME LIGHT DOES NOT ILLUMINATE NORMALLY»(ref-289392-S30977766992008063000000) ".
  3. STEP 3. Verify the horn. Check that the horn normally. Q: Is the check result normal? YES : Go to Step 4. NO : Replace the horn (Refer to «HORN»(ref-289392-S32110418482008063000000) ).
  4. STEP 4. Check the operation of the keyless entry system. Operate the transmitter and check that all doors lock and unlock. Q: Is the check result normal? YES : Go to Step 5. NO : Refer to " «INSPECTION PROCEDURE 5: KEYLESS ENTRY SYSTEM DOES NOT WORK.»(ref-289390-S16081007632008063000000) "
  5. STEP 5. Check the customize function (Hazard light answerback). Check that any one of the followings other than "Lock: 0, Unlock: 0" is set for "Hazard answerback" with a customization function. Lock:1, Unlock:2 Lock:1, Unlock:0 Lock:0, Unlock:2 Lock:2, Unlock:1 Lock:2, Unlock:0 Lock:0, Unlock:1 Q: Is the check result normal? YES : Go to Step 6. NO : Set "Hazard answerback" to any one other than "Lock: 0, Unlock: 0" with a customization function (Refer to «CUSTOMIZATION FUNCTION»(ref-289390-S01623064942008063000000) ).
  6. STEP 6. Check the customize function (Horn answerback). Check that any one of the followings other than "Not sound horn" is set for "Horn chirp by keyless" with a customization function. Lock any time W lock any time Q: Is the check result normal? YES : Go to Step 7. NO : Set "Horn chirp by keyless" to any one other than "Not sound horn" with a customization function (Refer to «CUSTOMIZATION FUNCTION»(ref-289390-S01623064942008063000000) ).
  7. STEP 7. Check of the troubles Check if the keyless entry answerback function works normally. Q: Is the check result normal? YES : Intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace ETACS-ECU.

Inspection Procedure 7: The timer lock function does not work after the doors have been unlocked by the keyless entry system

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
  1. The keyless entry transmitter may be defective
  2. The ETACS-ECU may be defective
  3. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
  1. STEP 1. Check the operation of the keyless entry system. Operate the transmitter and check that all doors lock and unlock. Q: Is the check result normal? YES : Go to Step 2. NO : Refer to " «INSPECTION PROCEDURE 5: KEYLESS ENTRY SYSTEM DOES NOT WORK.»(ref-289390-S16081007632008063000000) "
  2. STEP 2. Check the customize function. The "Timer lock timer" has been set to one of the followings with the customization function. Check if the doors are locked at the set period. 30sec 60sec 120sec 180sec Q: Is the check result normal? YES : Intermittent malfunction (Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTION»(ref-289379-S36733983872008063000000) ). NO : Replace ETACS-ECU.

Inspection Procedure 8: The trunk is not opened when the keyless entry transmitter "TRUNK" button is operated

CAUTIONBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

Scheme 40

Scheme 40
Scheme 40
  1. The keyless entry transmitter may be defective
  2. The reciever antenna assembly may be defective
  3. The WCM may be defective
  4. The ETACS-ECU may be defective
  5. The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. 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

Scheme 41

Scheme 41
Scheme 41

Scheme 42

Scheme 42
Scheme 42

Scheme 43

Scheme 43
Scheme 43

Scheme 44

Scheme 44
Scheme 44
  1. STEP 1. Check the operation of the keyless entry system. Operate the transmitter and check that all doors lock and unlock. Q: Is the check result normal? YES : Go to Step 2. NO : Refer to " «INSPECTION PROCEDURE 5: KEYLESS ENTRY SYSTEM DOES NOT WORK.»(ref-289390-S16081007632008063000000) "
  2. STEP 2. Using scan tool MB991958, check for diagnostic trouble code. 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-289390-S07646497722008063000000) " . Turn the ignition switch to the "ON" position. Check whether the WCM related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES : Diagnose the WCM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289390-S05350514502008063000000) . NO : Go to Step 3.
  3. STEP 3. Using scan tool MB991958, check pulse check. Check the signals related to the keyless entry system operation. 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-289390-S07646497722008063000000) " . Confirm the ETACS pulse check. Remove the ignition key from the ignition key cylinder. TRANSMITTER SWITCH CONDITIONS Item name Conditions Transmitter switch Turn the switch ON/OFF. OK: The scan tool (M.U.T.-III) tone alarm sounds. Q: Is the check result normal? YES : Go to Step 4. NO : Refer to " «SIGNALS FROM TRANSMITTER SWITCHES ARE NOT RECEIVED.»(ref-289390-S30107278752008063000000) "
  4. STEP 4. Check trunk lid latch connector F-19 and ETACS-ECU connector C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is trunk lid latch connector F-19 and ETACS-ECU connector C-311 in good condition? YES : Go to Step 5. NO : Repair or replace the damaged component(s). Refer to «HARNESS CONNECTOR INSPECTION»(ref-289377-S30386868932008063000000) .
  5. STEP 5. Check the trunk lid latch assembly. Remove the trunk lid latch assembly. Refer to «REMOVAL AND INSTALLATION»(ref-289409-S11681112302008063000000) . BATTERY CONNECTION AND LEVER OPERATION Lever position Battery connection Lever operation At the "LOCK" position Connect terminal No.2 and the negative battery terminal. Connect terminal No.3 and the positive battery terminal. The lever moves from the "LOCK" position to the "UNLOCK" position. Q: Is the trunk lid latch normal? YES : Go to Step 6. NO : Replace the trunk lid latch assembly.
  6. STEP 6. Check the ground circuit to the trunk lid latch. Measure the resistance at trunk lid latch connector F-19. Disconnect trunk lid latch connector F-19 and measure the resistance available at the wiring harness side of the connector. Measure the resistance value between terminal 2 and ground. The resistance should be 2 ohms or less. Q: Is the measured resistance 2 ohms or less? YES : Go to Step 9 . NO : Go to Step 7.
  7. STEP 7. Check the wiring harness between the trunk lid latch connector F-19 (terminal No. 2) and the ground for open circuit. Disconnect trunk lid latch connector F-19 and ground, and check the wiring harness. Check the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground. OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground in good condition? YES : Go to Step 8. NO (trunk lid latch connector F-19 terminal No. 2 - ground.) : Repair the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground.
  8. STEP 8. Check the wiring harness between the trunk lid latch connector F-19 (terminal No. 2) and the ground for open circuit. Disconnect trunk lid latch connector F-19 and ground, and check the wiring harness. Check the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground. OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground in good condition? YES : Go to Step 11 . NO (trunk lid latch connector F-19 terminal No. 2 - ground.) : Repair the wiring harness between trunk lid latch connector F-19 (terminal No. 2) and ground.
  9. STEP 9. Check the wiring harness between the trunk lid latch connector F-19 (terminal No. 3) and the ETACS-ECU connector C-311 (terminal No. 1) for open circuit. Disconnect trunk lid latch connector F-19 and ETACS-ECU connector C-311, and check the wiring harness. Check the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and ETACS-ECU connector C-311 (terminal No. 1). OK: Continuity exists (2 ohms or less) Q: Is the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and ETACS-ECU connector C-311 (terminal No. 1) in good condition? YES : Go to Step 10. NO (trunk lid latch connector F-19 terminal No. 3 - ETACS-ECU connector C-311 terminal No. 1.) : Repair the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and ETACS-ECU connector C-311 (terminal No. 1).
  10. STEP 10. Check the wiring harness between the trunk lid latch connector F-19 (terminal No. 3) and the ground for short circuit. Disconnect trunk lid latch connector F-19, and check the wiring harness. Check the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and ground OK: No continuity Q: Is the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and the ground in good condition? YES : Go to Step 11. NO (trunk lid latch connector F-19 terminal No. 3 - ground.) : Repair the wiring harness between trunk lid latch connector F-19 (terminal No. 3) and ground.
  11. STEP 11. Check of the troubles Operate the transmitter and check that the trunk lid can be opened. Q: Is the check result normal? YES : The diagnosis is complete. NO : Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the keyless ID. Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) . The trunk lid can be opened by means of the transmitter.
  1. Battery discharged in the transmitter
  2. Malfunction of the transmitter
  3. Malfunction of WCM

Required Special Tools

  1. MB992006: Extra fine probe
  2. MB991223: Harness set
  3. 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

Scheme 45

Scheme 45
Scheme 45
  1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 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-289390-S07646497722008063000000) " . Turn the ignition switch to the "ON" position. Check whether the WCM related DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES : Diagnose the WCM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-289390-S05350514502008063000000) . NO : Go to Step 2.
  2. STEP 2. Check the transmitter battery. Measure the voltage of the transmitter battery. The value should be approximately 2.5 - 3.2 volts. Q: Is the measured voltage approximately 2.5 - 3.2 volts? YES : Go to Step 3. NO : Replace the battery. If the transmitter can be registered normally, and operates normally, it indicates that the transmitter is sending normal signal to the WCM.
  3. STEP 3. Register the keyless ID using a known-good transmitter of the same type again, and check the trouble symptom. Register a known-good transmitter of the same type. Check if the signals from the transmitter switches are received. Q: Can the transmitter be registered correctly? YES : Replace the original transmitter with a new one. NO : Replace the WCM (Including when the new transmitter cannot be registered). Replace WCM and register the ID codes (Refer to «ID CODES REGISTRATION PROCEDURE»(ref-289390-S15289695762008063000000) .) If the transmitter works normally, the input signal from the transmitter should be normal.

Scheme 46

Scheme 46: CHECK AT ECU TERMINALS
Scheme 46: CHECK AT ECU TERMINALS
Terminal No.Check itemCheck conditionNormal condition
1Reciever antenna assembly CLOCK outputIgnition key lock button, unlock button, and trunk lid button: ON0 to 5 V (pulse signal)
2
3Reciever antenna assembly DATA outputIgnition key lock button, unlock button, and trunk lid button: ON0 to 5 V (pulse signal)
4
5Reciever antenna assembly power controlIgnition switch: OFF0 to 5 V (pulse signal)
6Power supply (Battery)AlwaysBattery voltage
7GroundAlways0 V
8Reciever antenna assembly groundAlways0 V
9Power supply (Ignition switch: IG1)Ignition switch: ONBattery voltage
10CAN L
11CAN H
12Reciever antenna assembly power supplyAlways5 V

ECU TERMINALS VOLTAGE SPECIFICATION

REGISTRATION USING SCAN TOOL MB991958 (M.U.T.-III SUB ASSEMBLY)

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

The ID codes necessary for the engine immobilizer system, the keyless entry system and the TPMS can be registered using the scan tool MB991958 (M.U.T.-III sub assembly). KOS and keyless operation key are indicated as F.A.S.T and F.A.S.T.-key respectively in the scan tool MB991958 (M.U.T.-III sub assembly) screen.

CAUTIONDo not register the ignition key registered for other vehicles.

Scheme 47

Scheme 47: SUPPLY UNIT LIST FOR INDIVIDUAL KEY
Scheme 47: SUPPLY UNIT LIST FOR INDIVIDUAL KEY

REGISTRATION NOT USING SCAN TOOL MB991958 (M.U.T.-III SUB ASSEMBLY) < USA ONLY >

When the ignition key is lost or additional keys are requested, the ignition key must be used to register key ID.

CAUTIONTwo ignition keys that have been registered are needed.

Scheme 48

Scheme 48
Scheme 48
  1. Turn the ignition switch to the "ON" position using the registered ignition key and keep it there for 5 seconds.
  2. Turn the ignition switch to the "LOCK" (OFF) position, and remove the registered ignition key.
  3. Within 30 seconds after the ignition key is removed, insert the other registered ignition key that has already been registered and turn the ignition switch to the "ON" position.
  4. The immobilizer indicator starts flashing in approximately 10 seconds after the ignition switch is turned to the "ON" position.
  5. When the immobilizer indicator starts flashing, turn the ignition switch to the "LOCK" (OFF) position and remove the ignition key. NOTE: When an error occurs while the immobilizer indicator is flashing, the immobilizer indicator extinguishes.
  6. Within 30 seconds after the immobilizer indicator flashes in Step 5, insert the ignition key to be added and turn the ignition switch to the "ON" position.
  7. When registering another ignition key, repeat the procedure from the beginning. NOTE: < When the additional ignition key cannot be registered > When the immobilizer indicator is not illuminated during registration When the immobilizer indicator does not change in 3 seconds after carrying out step 6 < When the additional registeration of the ignition key terminates automatically > When 30 seconds have passed before inserting the ignition key in Step 3 after the ignition key is removed in Step 2. When 30 seconds have passed after the immobilizer indicator flashed

KEYLESS ID NOT USING SCAN TOOL MB991958 (M.U.T.-III SUB ASSEMBLY) < USA ONLY >

When the keyless ID code is already registered in the transmitter, the keyless ID code can be registered without using the scan tool MB991958 (M.U.T.-III sub assembly) according to the following procedures.

  1. Prepare all the transmitters for ID code registration before starting the operation.
  2. Press the unlock button of the transmitter in which the keyless ID code is registered.
  3. After pressing the unlock button, press the lock button within 4 seconds to less than 10 seconds.
  4. Release the lock button within 10 seconds after pressing it.
  5. Release the unlock button 0.5 seconds after releasing the lock button. NOTE: The WCM erases the keyless ID codes of the transmitters other than the operated transmitter. NOTE: The WCM sets the transmitter registration number to 1.
  6. When the operations from Step 1 to Step 4 are completed, the door can be locked or unlocked, and the mode shifts to the customer-programming mode. Within 1 minute after the mode shifted to the customer-programming mode, the signal for registration is transmitted from the transmitter to be added. NOTE: How to transmit the transmitter registration signal Press the lock button and the unlock button of the transmitter to be added for 1 second or more simultaneously. Release the lock button and the unlock button simultaneously. After releasing the lock button and unlock button simultaneously, when 0.5 seconds or more has elapsed, press the unlock button. NOTE: The WCM receives the registration signal, and stores the keyless ID code of the transmitter. NOTE: The WCM adds the transmitter registration number by 1.
  7. When the operation of Step 5 is finished, the door can be locked or unlocked to notify that the transmitter registration is completed.
  8. To register another transmitter, repeat the operation of Step 5 within 1 minute after the previous transmitter registration.
  9. The customer-programming mode is terminated by any of the following conditions. When the registration of 8 transmitters are completed When 1 minute has elapsed without registration after the shift to the customer-programming mode when 1 minute has elapsed after previous transmitter registration When the engine speed is more than 200 rpm The EEPROM abnormality occurs [When the EEPROM abnormality occurs during the transmitter registration, delete all the transmitters stored (including the transmitters used for the shift to the customer-programming mode), and finish the customer-programming mode.]

INSPECTION OF KEYLESS ENTRY TIMER LOCK FUNCTION

Attempt to unlock the doors by using the transmitter. If the doors are not locked within 30 seconds, carry out diagnosis. Note that the doors will not be locked if the ignition key is inserted within the 30-second period, or the doors are opened. Refer to TROUBLE SYMPTOM CHART .

Note. The operation time of the keyless entry timer lock function can be set using the customization function. Confirm the operation time before performing the diagnosis. Refer to CUSTOMIZATION FUNCTION .

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