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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Rear Axle - Lancer Evolution) >> Rear Axle Diagnosis < AYC > >> Inspection Procedure For Diagnosis Code >> Code No. C1619 AYC current value abnormality >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEP 1. Scan tool CAN bus diagnostics 

    Using the scan tool, diagnose the CAN bus lines.

    Q: Is the check result normal? 

    YES  : Go to Step  3.

    NO  : Repair the CAN bus line (Refer to TROUBLESHOOTING ). After repairing the CAN bus line, go to Step 2.

  2. STEP 2. DTC recheck after repairing the CAN bus line 
    1. Erase the DTC.
    2. Turn the ignition switch from the LOCK (OFF) position to the ON position, and then wait for 4 seconds.
    3. Check if the DTC is set.

    Q: Is DTC No. C1619 set? 

    YES  : Go to Step 3.

    NO  : This diagnosis is complete.

  3. STEP 3. Connector check: 

    Check the connectors below for improper engagement, terminal damage or terminal drawn in the connector case.

    • C-46 AWC-ECU connector
    • F-17 AYC proportioning valve connector
    • D-11 intermediate connector, F-11 intermediate connector
    • No. 9 body ground

    Q: Are the connectors and terminals in good condition? 

    YES  : Go to Step 4.

    NO  : Repair the faulty connector(s) or terminal(s). Then go to Step  8.

  4. STEP 4. Harness check 
    1. Check the wiring harness among C-46 AWC-ECU connector (terminal No. 2), D-11 intermediate connector (terminal No. 1), F-11 intermediate connector (terminal No. 4), and F-17 AYC proportioning valve connector (terminal No. 3) for any problems.
    2. Check the wiring harness among F-17 AYC proportioning valve connector (terminal No. 2), F-11 intermediate connector (terminal No. 3), and No. 9 body ground for any problems.

    Q: Is the harness in good condition? 

    YES  : Go to Step 5.

    NO  : Repair the problem in the wiring harness. Then go to Step  8.

  5. STEP 5. Resistance measurement between AYC proportioning valve solenoid connector (equipment side) terminals 

    Disconnect the F-17 AYC proportioning valve connector and measure the resistance between connector terminals on the equipment side.

    Fig 1: Measuring Resistance Between Connector Terminals
    G05394370Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Standard value: 3.7 ± 0.3 Ω 

    Q: Is the measured resistance value within the standard value range? 

    YES  : Go to Step 6.

    NO  : Replace the hydraulic unit. (Refer to HYDRAULIC UNIT  .) Then go to Step  8.

  6. STEP 6. Scan tool service data 

    Check the following service data. (Refer to TROUBLE SYMPTOM CHART  .)

    • Item 93: Specified current for AYC proportioning valve

    Q: Is the check result normal? 

    YES  : Go to Step 7.

    NO  : Replace the AWC-ECU (Refer to AWC-ECU ). Then, go to Step  8.

  7. STEP 7. Check whether the DTC is reset. 
    1. Erase the DTC.
    2. Turn the ignition switch from the LOCK (OFF) position to the ON position, and then wait for 4 seconds.
    3. Check if the DTC is set.

    Q: Is DTC No. C1619 set? 

    YES  : Replace the AWC-ECU (Refer to AWC-ECU ). Then go to Step 8.

    NO  : An intermittent malfunction is suspected. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)

  8. STEP 8. Check whether the DTC is reset. 
    1. Erase the DTC.
    2. Turn the ignition switch from the LOCK (OFF) position to the ON position, and then wait for 4 seconds.
    3. Check if the DTC is set.

    Q: Is DTC No. C1619 set? 

    YES  : Diagnose again from Step  1.

    NO  : This diagnosis is complete.

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