LEMON Manuals: Even more car manuals for everyone
Home >> Acura >> 2020 >> ILX >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Engine Control System - Diagnostics (P0328 - P0533) (Except Hybrid)) >> DTC Troubleshooting >> DTC P0340 (1.5 L Engine)

DTC P0340 (1.5 L Engine)

WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0340  : CMP Sensor A No Signal

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC Description Confirmed DTC Pending DTC
P0340 CMP Sensor A No Signal    

DTC (PGM-FI)

  1. Problem verification

    -1. Turn the vehicle to the ON mode.

    -2. Clear the DTC with the HDS.

    -3. Start the engine.

    -4. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC
    P0340 CMP Sensor A No Signal    

    Is DTC P0340 indicated?

    YES 

    Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at CMP sensor A and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

  2. Determine possible failure area (VCC2 line, others)

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

    -2. Disconnect the following connector.

    CMP sensor A 3P connector

    -3. Turn the vehicle to the ON mode.

    -4. Measure the voltage between test points 1 and 2.

    Test condition Vehicle ON mode
      CMP sensor A 3P connector: disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 1:
    Test point 2 Body ground
    GHH393088Courtesy of HONDA, U.S.A., INC.

    Is there about 5.0 V?

    YES 

    Go to step 4.

    NO 

    Go to step 3.

  3. Open wire check (VCC2 line)

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

    -2. Jump the SCS line with HDS, and wait more than 1 minute.

    -3. Disconnect the following connector.

    PCM connector E (80P)

    -4. Check the continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CMP sensor A 3P connector: disconnected
      PCM connector E (80P): disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 1:
    Test point 2 PCM connector E (80P) No. 77
    GHH393090Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The VCC2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

    NO 

    Repair an open in the VCC2 wire between the PCM (E77) and CMP sensor A.

  4. Determine possible failure area (TDCAM line, others)

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

    Test condition Vehicle ON mode
      CMP sensor A 3P connector: disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 3:
    Test point 2 Body ground
    GHH393092Courtesy of HONDA, U.S.A., INC.

    Is there about 5.0 V?

    YES 

    Go to step 5.

    NO 

    Go to step 7.

  5. Determine possible failure area (SG2 line, others)

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

    Test condition Vehicle ON mode
      CMP sensor A 3P connector: disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 1:
    Test point 2 CMP sensor A 3P connector (female terminals) No. 2:
    GHH393095Courtesy of HONDA, U.S.A., INC.

    Is there about 5.0 V?

    YES 

    The SG2 wire is OK. Replace CMP sensor A .

    NO 

    Go to step 6.

  6. Open wire check (SG2 line)

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

    -2. Jump the SCS line with the HDS, and wait more than 1 minute.

    -3. Disconnected the following connector.

    PCM connector E (80P)

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CMP sensor A 3P connector: disconnected
      PCM connector E (80P): disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 2:
    Test point 2 PCM connector E (80P) No. 78
    GHH393097Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The SG2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

    NO 

    Repair an open in the SG2 wire between the PCM (E78) and CMP sensor A.

  7. Shorted wire check (TDCAM line)

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

    -2. Jump the SCS line with the HDS, and wait more than 1 minute.

    -3. Disconnect the following connector.

    PCM connector E (80P)

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CMP sensor A 3P connector: disconnected
      PCM connector E (80P): disconnected
    Test point 1 PCM connector E (80P) No. 43
    Test point 2 Body ground

    Is there continuity?

    YES 

    Repair a short in the TDCAM wire between the PCM (E43) and CMP sensor A.

    NO 

    Go to step 8.

  8. Open wire check (TDCAM line)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CMP sensor A 3P connector: disconnected
      PCM connector E (80P): disconnected
    Test point 1 CMP sensor A 3P connector (female terminals) No. 3:
    Test point 2 PCM connector E (80P) No. 43
    GHH393099Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The TDCAM wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

    NO 

    Repair an open in the TDCAM wire between the PCM (E43) and CMP sensor A.

scientia non olet · About LEMON Manuals