LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2019 >> Clarity Plug-In Hybrid >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC Diagnostics (P0571 - P2119) (Plug-In) >> DTC Troubleshooting >> DTC P172A
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P172A

DTC P172A  : KEY-Release Wake-up Output Circuit Malfunction

NOTE: Before you troubleshoot, review the General Troubleshooting Information .
DTC Description Confirmed DTC Pending DTC Freeze Frame
P172A KEY-Release Wake-up Output Circuit Malfunction      

DTC (Gear)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Turn the vehicle to the OFF (LOCK) mode.

    -4. Turn the vehicle to the ON mode, and wait for at least 10 seconds.

    -5. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC Freeze Frame
    P172A KEY-Release Wake-up Output Circuit Malfunction      

    Is DTC P172A indicated?

    YES 

    The failure is duplicated. Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

  2. Determine possible failure area (SBW shifter control module, others)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Disconnect the following connector.

    SBW shifter control module 20P connector

    -3. Measure the voltage between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      SBW shifter control module 20P connector: disconnected
    Test point 1 SBW shifter control module 20P connector No. 7
    Test point 2 Body ground

    Is there voltage?

    YES 

    SBW shifter control module is OK, go to step 3.

    NO 

    Faulty SBW shifter control module. Replace the SBW shifter assembly .

  3. Shorted wire check (SRKS line to power)

    -1. Disconnect the following connector.

    Body control module connector G (32P)

    -2. Measure the voltage between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      SBW shifter control module 20P connector: disconnected
      Body control module connector G (32P): disconnected
    Test point 1 SBW shifter control module 20P connector No. 7
    Test point 2 Body ground

    Is there voltage?

    YES 

    Repair a short to power in the SRKS wire between the SBW shifter control module and the Body control module.

    NO 

    The SRKS wire is OK. Replace the Body control module .