LEMON Manuals: Even more car manuals for everyone
Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 52 (Automatic Transaxle On-Vehicle Service - With Diagnostics) >> Automatic Transaxle Diagnosis < A/T > >> Diagnostic Trouble Code Procedures >> DTC P0988: Low-Reverse Brake Pressure Switch System >> Diagnosis

DTC P0988: Low-Reverse Brake Pressure Switch System: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEP 1. Check the DTC. 

    Q: Is the DTC other than the pressure switch stored? (Is the code other than P0846, P0876, and P0988 stored?) 

    • YES:  Check and repair the relevant DTC system.
    • NO:  Go to Step 2.
  2. STEP 2. Check the TCM terminal voltage. 

    [TCM connector (harness side, connected)]

    Measure the voltage between LRPS terminal and body ground.

    • Low-reverse brake engaged: 0 V
    • Other than above: Battery positive voltage

    Q: Is the check result normal? 

    • YES:  Go to Step 3.
    • NO:  Go to  Step 7.
  3. STEP 3. Check for continuity in LRPS line between the TCM connector and the A/T control solenoid valve assembly. 

    When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.

    Q: Is the check result normal? 

    • YES:  Go to Step 4.
    • NO:  Repair the connector(s) or wiring harness.
  4. STEP 4. Check the TCM, A/T control solenoid valve assembly connector pin terminals, and the connection status. 

    Q: Is the check result normal? 

    • YES:  Go to Step 5.
    • NO:  Repair or replace the failure section.
  5. STEP 5. Check for continuity in signal line between the A/T control solenoid valve assembly connector and the low-reverse brake pressure switch. 

    When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.

    Q: Is the check result normal? 

    • YES:  Go to Step 6.
    • NO:  Repair the connector(s) or wiring harness.
  6. STEP 6. Check the low-reverse brake pressure switch body ground. 

    Check for continuity between the low-reverse brake pressure switch body and ground.

    • Between the low-reverse brake pressure switch body and body ground: Continuity exists.

    Q: Is the check result normal? 

    • YES:  Replace the valve body assembly, and then go to  Step 8.
    • NO:  Repair or replace the failure section.
  7. STEP 7. Check the TCM, A/T control solenoid valve assembly connector pin terminals, and the connection status. 

    Q: Is the check result normal? 

    • YES:  Go to  Step 9.
    • NO:  Repair or replace the failure section.
  8. STEP 8. Erase the DTC, and drive the vehicle for a while. 

    Check that the normal code is displayed.

    Q: Is the check result normal? 

    • YES:  The procedure is complete.
    • NO:  Replace the TCM.
  9. STEP 9. Erase the DTC, and drive the vehicle for a while. 

    Check that the normal code is displayed.

    Q: Is the check result normal? 

    • YES:  The procedure is complete.
    • NO:  Return to  Step 1.
scientia non olet · About LEMON Manuals