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DIAGNOSTIC FUNCTION
 
 
WARNING INDICATOR
When any malfunction occurs in the items related to the CVT system, which are described below, the symbol (A) continues being displayed in the information screen in the multi information display.
Check if the diagnostic trouble code is set when the symbol (A) continues being displayed in the information screen in the multi information display.
noteWhen the symbol (B) is displayed in the information screen in the multi information display, the transmission fluid temperature is high. (Symbol (B) is turned on when the fluid temperature is approximately 138°C (280°F) or higher and turned off automatically when the fluid temperature drops below approximately 135°C (275°F).)
 
 
 
ON-BOARD DIAGNOSTICS
The transaxle control module (TCM) monitors its input/output signals (some signals all the time and others under specified conditions). When an irregular signal is initially monitored, the TCM decides that a malfunction has occurred and records the occurrence as a diagnostic trouble code. There are 44 diagnostic items. The diagnostic results can be read with scan tool. Diagnostic trouble codes are kept in memory by direct battery feed. The codes are retained in memory even if the ignition switch is in the "LOCK" (OFF) position. DTCs are not erased even after the battery terminals and the TCM connector are disconnected. In addition, the diagnostic trouble code can also be erased by scan tool.
noteIf a sensor is disconnected when the ignition switch is in the "ON" position, a diagnostic trouble code is stored in memory. In this case, erase the DTC using scan tool.
The 44 diagnostic items are displayed in numeric order.
 
 
HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
Required Special Tools:
  • 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.
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
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.
noteWhen 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.
noteDisconnecting 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:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A
1.
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
caution
  • When the diagnostic trouble code (DTC) of the transaxle control module (TCM) is erased, the DTC of the engine control module (ECM) is also erased at the same time.
  • If DTC (U0001) of the Malfunction of CAN communication circuit (Bus off) or DTC (U0100) of the CAN time-out error (Engine) is set as a current trouble to the TCM, CAN bus diagnosis or troubleshooting each DTC should be carried out since the DTC of TCM will not be erased.
noteIf the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool MB991958 does not display.
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 06 MY."
5. Make sure vehicle information is correct.
6. Select "AT/CVT/A-MT/TC-SST."
7. Select "Diagnostic Trouble Code" to read the DTC.
8. If a DTC is set, it is shown.
9. Choose "Erase DTCs" to erase the DTC.
 
 
 
HOW TO READ DATA LIST
Required Special Tools:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A
1.
cautionTo 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.
2. Turn the ignition switch to the "ON" position.
3. Select "System select" from the start-up screen.
4. Select "From 06 MY."
5. Make sure vehicle information is correct.
6. Select "AT/CVT/A-MT/TC-SST."
7. Select "Data List."
8. Choose an appropriate item and select the "OK" button.
 
 
 
HOW TO DIAGNOSE THE CAN BUS LINES
Refer to GROUP 54C, CAN Bus Diagnosis .