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DTC P16E5 (1.5 L Engine) (2020 2021)

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
    P16E3 PGM-FI-Battery Sensor LIN Communication Error    

    Is DTC P16E3 indicated?

    YES 

    Go to step 9.

    NO 

    Go to step 4.

  4. DTC check 3

    -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 13.

    NO 

    Go to step 17.

  5. 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. Measure the resistance 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
    GHH426057Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 7.

    NO 

    Go to step 6.

  6. 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)
    • 12 volt battery sensor 2P connector
    • Shutter grille (upper) 4P connector
    • Shutter grille (lower) 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), the shutter grille, and the 12 volt battery sensor.

  7. 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. Measure the resistance 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
    GHH426059Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 8.

    NO 

    Replace the DC-DC converter .

  8. 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. Measure the resistance 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
    GHH426061Courtesy 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.

  9. 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. Measure the resistance 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
    GHH426063Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 11.

    NO 

    Go to step 10.

  10. 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)
    • 12 volt battery sensor 2P connector
    • Shutter grille (upper) 4P connector
    • Shutter grille (lower) 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), the shutter grille, and the 12 volt battery sensor.

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

    -1. Reconnect the following connector.

    DC-DC converter connector A (3P)

    -2. Disconnect the following connector.

    12 volt battery sensor 2P connector

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

    Test condition Vehicle OFF (LOCK) mode
      12 volt battery sensor 2P connector: disconnected
    Test point 1 12 volt battery sensor 2P connector (female terminals) No. 2:
    Test point 2 Body ground
    GHH426065Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 12.

    NO 

    Replace the DC-DC converter .

  12. 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. Measure the resistance between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    12 volt battery sensor 2P 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
    GHH426067Courtesy 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.

  13. 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. Measure the resistance 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
    GHH426069Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 15.

    NO 

    Go to step 14.

  14. 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)
    • 12 volt battery sensor 2P connector
    • Shutter grille (upper) 4P connector
    • Shutter grille (lower) 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), the shutter grille, and the 12 volt battery sensor.

  15. 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 (upper/lower) 4P connector

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

    Test condition Vehicle OFF (LOCK) mode
      Shutter grille (upper/lower) 4P connector: disconnected
    Test point 1 Shutter grille (upper/lower) 4P connector (female terminals) No. 3:
    Test point 2 Body ground
    GHH426071Courtesy of HONDA, U.S.A., INC.

    Is there 1 MΩ or more?

    YES 

    Go to step 16.

    NO 

    Replace the DC-DC converter .

  16. 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. Measure the resistance between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Shutter grille (upper/lower) 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
    GHH426073Courtesy 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.

  17. Fuse check

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

    -2. Check the following fuse.

    Fuse No. D21

    Is the fuse OK?

    YES 

    Go to step 18.

    NO 

    Repair a short in the IG1 ACG wire between the DC-DC converter and the No. D21 fuse. Also replace the No. D21 fuse.

  18. 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. Measure the voltage 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
    GHH426075Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Go to step 19.

    NO 

    Repair an open in the IG1 ACG wire between the DC-DC converter and the No. D21 fuse .

  19. 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. Measure the resistance 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
    GHH426077Courtesy 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.

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