DTC P16E2 (2.4 L Engine) (2017 2018 2019)

DTC P16E2  : PGM-FI-ACG LIN Communication Error

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• Check for a loose terminal on the alternator (+B terminal). If the alternator +B terminal was loose, DTC P16E2 will be stored.

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
   P16E2 PGM-FI - ACG LIN Communication Error

   Is DTC P16E2 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 alternator 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
   P16E3 PGM-FI-Battery Sensor LIN Communication Error

   Is DTC P16E3 indicated?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. DTC check 2 (with shutter grille)

   -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.

   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

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 5.

   NO 

   Go to step 6.

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 the alternator 1P connector terminal and body ground, while disconnecting these connectors, one at a time:

   • PCM connector B (51P)
   • 12 volt battery sensor 2P connector
   • Shutter grille (upper) 4P connector (with shutter grille)
   • Shutter grille (lower) 4P connector (with shutter grille)

   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 PCM (B40), the alternator, the 12 volt battery sensor, and the shutter grille (with shutter grille).

6. Determine possible failure area (alternator, others)

   -1. Reconnect the alternator 1P connector.

   -2. Disconnect the following connector.

   12 volt battery sensor 2P connector

   -3. Check for continuity 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

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Replace the alternator .

   NO 

   Go to step 7.

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.

   Alternator 1P connector

   PCM connector B (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	12 volt battery sensor 2P connector: disconnected
   	Alternator 1P connector: disconnected
   	PCM connector A (50P): disconnected
   Test point 1	Alternator 1P connector (female terminal) No. 1:
   Test point 2	PCM connector B (51P) No. 40

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   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 (B40) and the alternator.

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.

   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

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 9.

   NO 

   Go to step 10.

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 the alternator 1P connector terminal and body ground, while disconnecting these connectors, one at a time:

   • PCM connector B (51P)
   • 12 volt battery sensor 2P connector
   • Shutter grille (upper) 4P connector (with shutter grille)
   • Shutter grille (lower) 4P connector (with shutter grille)

   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 PCM (B40), the alternator, the 12 volt battery sensor and the shutter grille (with shutter grille).

10. Determine possible failure area (alternator, others)

    -1. Reconnect the alternator 1P connector.

    -2. Disconnect the following connector.

    Shutter grille (upper/lower) 4P connector

    -3. Check for continuity 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

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the alternator .

    NO 

    Go to step 11.

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.

    Alternator 1P connector

    PCM connector B (51P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Alternator 1P connector: disconnected
    	Shutter grille (upper/lower) 4P connector: disconnected

    	PCM connector B (51P): disconnected
    Test point 1	Alternator 1P connector (female terminal) No. 1:
    Test point 2	PCM connector B (51P) No. 40

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    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 (B40) and the alternator.

12. 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 connectors.

    Alternator 1P connector

    PCM connector B (51P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Alternator 1P connector: disconnected
    	PCM connector B (51P): disconnected
    Test point 1	Alternator 1P connector (female terminal) No. 1:
    Test point 2	PCM connector B (51P) No. 40

    Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The LIN (BATT SENSOR)/LIN wire is OK. Replace the alternator .

    NO 

    Repair an open in the LIN (BATT SENSOR)/LIN wire between the PCM (B40) and the alternator.