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Home >> Mitsubishi >> 2017 >> Lancer SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Twin Clutch-SPORTRONIC Shift Transmission (TC-SST) - With Diagnostics - Lancer (2 Of 6)) >> Diagnostic Trouble Code Procedures >> DTC P1802: Shift Lever System (LIN communication malfunction) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools: 

  1. STEP 1. Scan tool CAN bus diagnostics 

    Using scan tool MB991958, diagnose the CAN bus lines.

    Q: Is the check result normal? 

    1. YES:  Go to Step 2.
    2. NO:  Repair the CAN bus lines. (Refer to TROUBLESHOOTING .) After repairing the CAN bus line, go to Step 2.
  2. STEP 2. Scan tool diagnostic trouble code 

    Check the shift lever diagnostic trouble code. (Refer to DIAGNOSTIC TROUBLE CODE TABLE .)

    Q: Is the DTC set? 

    1. YES:  Perform the relevant troubleshooting.
    2. NO:  Go to Step 3.
  3. STEP 3. Inspection of the TC-SST-ECU connector, intermediate connector, and shift lever-ECU connector: B-120, A-54, C-49 

    Check for the contact with terminals.

    Q: Is the check result normal? 

    1. YES:  Go to Step 4.
    2. NO:  Repair the defective connector.
  4. STEP 4. Check the wiring harness between B-120 TC-SST-ECU connector terminal No. 17 and C-49 shift lever-ECU connector terminal No. 16. 

    Check the communication line for open and short circuit.

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  Repair the wiring harness.
  5. STEP 5. Check whether the DTC is reset. 

    10 seconds after turning ON the ignition switch, check that the DTC is reset.

    Q: Is DTC No. P1802 set? 

    1. YES:  Go to Step 6.
    2. NO:  This diagnosis is complete.
  6. STEP 6. Replace the shift lever assembly, and check if the diagnostic trouble code is reset. 
    1. Replace the shift lever assembly. (Refer to >> A << TRANSAXLE CONTROL CABLE (TRANSAXLE SIDE/SHIFT LEVER SIDE) INSTALLATION .)
    2. Check the DTC.
    3. After 10 or more seconds have passed with the ignition switch ON position, check that the DTC is reset.

    Q: Is DTC No. P1802 set? 

    1. YES:  Replace the mechatronic assembly. (Refer to << A >> MECHATRONIC ASSEMBLY REMOVAL .)
    2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
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