DTC P16E2: PGM-FI-ACG LIN Communication Error

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
• 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, and wait for 10 seconds.

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

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

  Is DTC P16E2 indicated?

  YES 

  The failure is duplicated. 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 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. DTC check:

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

  DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
  P16E3 PGM-FI-Battery Sensor LIN Communication Error

  Is DTC P16E3 indicated?

  YES 

  Go to step 3.

  NO 

  Go to step 7.

• 3. Determine possible failure area (LIN(BATT SENSOR)/LIN circuit shorted, 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 No. 1
  Test point 2	Body ground

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

  Is there continuity?

  YES 

  Go to step 4.

  NO 

  Go to step 5.

• 4. Shorted wire check (LIN(BATT SENSOR)/LIN line):

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

  - 2. Continue to check for continuity between the alternator 1P connector terminal and body ground, while disconnecting these connectors, one at a time:

  • 12 volt battery sensor 2P connector
  • PCM connector B (51P)

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

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

• 5. Determine possible failure area (alternator, others):

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

  - 2. Disconnect the following connector.

  12 volt battery sensor 2P connector

  - 3. Reconnect the alternator 1P connector.

  - 4. 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 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 6.

• 6. Open wire check (LIN line):

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

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

  Is there continuity?

  YES 

  The LIN wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P16E2 goes away and the PCM was updated, troubleshooting is complete. If DTC P16E2 goes away and the PCM was substituted, replace the original PCM .

  NO 

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

• 7. Open wire check (LIN 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 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 No. 1
  Test point 2	PCM connector B (51P) No. 40

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

  Is there continuity?

  YES 

  The LIN wire is OK. Replace the alternator .

  NO 

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