LEMON Manuals: Even more car manuals for everyone
Home >> Acura >> 2020 >> ILX >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Control System - Diagnostics (P16E2 - P2184) (Except Hybrid)) >> DTC Troubleshooting >> DTC P16E5 (1.5 L Engine) (2021)

DTC P16E5 (1.5 L Engine) (2021)

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 P16E5  : LIN Communication Error (PCM - DC-DC Converter)

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

DTC Description Confirmed DTC Pending DTC
P16E5 LIN Communication Error (PCM-DC-DC Converter)    

DTC (PGM-FI)

  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 10 seconds.

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

    DTC Description Confirmed DTC Pending DTC
    P16E5 LIN Communication Error (PCM-DC-DC Converter)    

    Is DTC P16E5 indicated?

    YES 

    Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the DC-DC converter 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. DTC check 1

    -1. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC
    P16E2 PGM-FI-ACG LIN Communication Error    

    Is DTC P16E2 indicated?

    YES 

    Go to step 5

    NO 

    Go to step 3.

  3. DTC check 2

    -1. Check for Pending or Confirmed DTCs with the HDS.

    DTC Description Confirmed DTC Pending DTC
    P16E8 PGM-FI-Shutter Grille LIN Communication Error    

    Is DTC P16E8 indicated?

    YES 

    Go to step 8.

    NO 

    Go to step 12.

  4. Determine possible failure area (LIN (BATT SENSOR)/LIN line, others)

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

    -2. Disconnect the following connector.

    DC-DC converter connector A (3P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      DC-DC converter connector A (3P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1:
    Test point 2 Body ground
    GHH393635Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 6.

    NO 

    Go to step 5.

  5. Shorted wire check (LIN (BATT SENSOR)/LIN line)

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

    Continue to check for continuity between DC-DC converter connector A (3P) terminal No. 1 and body ground, while disconnecting these connectors, one at a time:

    • Alternator 1P connector
    • PCM connector A (50P)
    • Shutter grille 4P connector

    Does continuity go away when one of the above connectors is disconnected?

    YES 

    The LIN (BATT SENSOR)/LIN wire is OK. Replace the part that caused an open when it was disconnected.

    NO 

    Repair a short in the LIN (BATT SENSOR)/LIN wire between the DC-DC converter, the alternator, the PCM (A10), and the shutter grille.

  6. Determine possible failure area (DC-DC converter, others)

    -1. Reconnect the following connector.

    DC-DC converter connector A (3P)

    -2. Disconnect the following connector.

    Alternator 1P connector

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Alternator 1P connector: disconnected
    Test point 1 Alternator 1P connector (female terminal) No. 1:
    Test point 2 Body ground
    GHH393637Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 7.

    NO 

    Replace the DC-DC converter .

  7. Open wire check (LIN (BATT SENSOR)/LIN line) 1

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

    -2. Disconnect the following connectors.

    PCM connector A (50P)
    DC-DC converter connector A (3P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Alternator 1P connector: disconnected
    PCM connector A (50P): disconnected
    DC-DC converter connector A (3P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1:
    Test point 2 PCM connector A (50P) No. 10
    GHH393639Courtesy of HONDA, U.S.A., INC.

    Is there 1.0 Ω or less?

    YES 

    The LIN (BATT SENSOR)/LIN 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 LIN (BATT SENSOR)/LIN wire between the PCM (A10) and the DC-DC converter.

  8. Determine possible failure area (LIN (BATT SENSOR)/LIN line, others)

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

    -2. Disconnect the following connector.

    DC-DC converter connector A (3P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      DC-DC converter connector A (3P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1:
    Test point 2 Body ground
    GHH393641Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 10.

    NO 

    Go to step 9.

  9. Shorted wire check (LIN (BATT SENSOR)/LIN line)

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

    Continue to check for continuity between DC-DC converter connector A (3P) terminal No. 1 and body ground, while disconnecting these connectors, one at a time:

    • Alternator 1P connector
    • PCM connector A (50P)
    • Shutter grille 4P connector

    Does continuity go away when one of the above connectors is disconnected?

    YES 

    The LIN (BATT SENSOR)/LIN wire is OK. Replace the part that caused an open when it was disconnected.

    NO 

    Repair a short in the LIN (BATT SENSOR)/LIN wire between the DC-DC converter, the alternator, the PCM (A10), and the shutter grille.

  10. Determine possible failure area (DC-DC converter, others)

    -1. Reconnect the following connector.

    DC-DC converter connector A (3P)

    -2. Disconnect the following connector.

    Shutter grille 4P connector

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Shutter grille 4P connector: disconnected
    Test point 1 Shutter grille 4P connector (female terminals) No. 3:
    Test point 2 Body ground
    GHH393643Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 11.

    NO 

    Replace the DC-DC converter .

  11. Open wire check (LIN (BATT SENSOR)/LIN line) 1

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

    -2. Disconnect the following connectors.

    PCM connector A (50P)
    DC-DC converter connector A (3P)

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Shutter grille 4P connector: disconnected
    PCM connector A (50P): disconnected
    DC-DC converter connector A (3P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1:
    Test point 2 PCM connector A (50P) No. 10
    GHH393645Courtesy of HONDA, U.S.A., INC.

    Is there 1.0 Ω or less?

    YES 

    The LIN (BATT SENSOR)/LIN 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 LIN (BATT SENSOR)/LIN wire between the PCM (A10) and the DC-DC converter.

  12. Fuse check

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

    -2. Check the following fuse.

    Fuse No. A42

    Is the fuse OK?

    YES 

    Go to step 13.

    NO 

    Repair a short in the IG1 ACG wire between the DC-DC converter and the No. A42 fuse. Also replace the No. A42 fuse.

  13. Open wire check (IG1 ACG line)

    -1. Disconnect the following connector.

    DC-DC converter connector A (3P)

    -2. Turn the vehicle to the ON mode.

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle ON mode
      DC-DC converter connector A (3P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 3:
    Test point 2 Body ground
    GHH393647Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Go to step 14.

    NO 

    Repair an open in the IG1 ACG wire between the DC-DC converter and the No. A42 fuse .

  14. Open wire check (LIN (BATT SENSOR)/LIN line) 2

    -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 A (50P)

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

    Test condition Vehicle OFF (LOCK) mode
    DC-DC converter connector A (3P): disconnected
    PCM connector A (50P): disconnected
    Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1:
    Test point 2 PCM connector A (50P) No. 10
    GHH393649Courtesy of HONDA, U.S.A., INC.

    Is there 1.0 Ω or less?

    YES 

    The LIN (BATT SENSOR)/LIN wire is OK. Replace the DC-DC converter .

    NO 

    Repair an open in the LIN (BATT SENSOR)/LIN wire between the PCM (A10) and the DC-DC converter.

scientia non olet · About LEMON Manuals