DTC P16E5 (16-18 9-Speed A/T)

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

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

DTC (PGM-FI)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS, and wait 10 seconds.

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

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

   DTC (PGM-FI)

   Is DTC P16E5 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 DC-DC converter 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 - Refer to: How to Troubleshoot the Fuel and Emissions Systems .

2. DTC check

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

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

   DTC (PGM-FI)

   Is DTC P16E2 indicated?

   YES 

   Go to step 3.

   NO 

   Go to step 7.

3. Determine possible failure area (LIN/LIN (ACG) line shorted, 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) 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/LIN (ACG) line)

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

   - 2. 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
   • Battery fan motor 3P connector
   • PCM connector B (51P)

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

   YES 

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

   NO 

   Repair a short in the LIN/LIN (ACG) wire between the PCM (B50), the alternator, and the DC-DC converter.

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

   - 1. Reconnect 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 No. 1
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Replace the DC-DC converter .

   NO 

   Go to step 6.

6. Open wire check (LIN/LIN (ACG) line)

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

   - 2. Disconnect the following connectors.

   PCM connector B (51P)

   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 B (51P): disconnected
   	DC-DC converter connector A (3P): disconnected
   Test point 1	DC-DC converter connector A (3P) No. 1
   Test point 2	PCM connector B (51P) No. 50 - Refer to: PCM Connector for Inputs and Outputs (16-18 9-Speed A/T)

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

   Is there continuity?

   YES 

   The LIN/LIN (ACG) wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to:

   PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T) .

   NO 

   Repair an open in the LIN/LIN (ACG) wire between the PCM (B50) and the DC-DC converter.

7. Fuse check

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

   - 2. Check the following fuse.

   Fuse	No. C7 (15 A)
   Location	Under-dash fuse/relay box

   Is the fuse OK?

   YES 

   Go to step 8.

   NO 

   Repair a short in the IG1 ACG wire between the DC-DC converter and the No. C7 (15 A) fuse. Also replace the No. C7 (15 A) fuse.

8. 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) No. 3
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Go to step 9.

   NO 

   Repair an open in the IG1 ACG wire between the DC-DC converter and the No. C7 (15 A) fuse in the under-dash fuse/relay box.

9. Open wire check (LIN/LIN (ACG) 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 B (51P)

   - 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 B (51P): disconnected
   Test point 1	DC-DC converter connector A (3P) No. 1
   Test point 2	PCM connector B (51P) No. 50 - Refer to: PCM Connector for Inputs and Outputs (16-18 9-Speed A/T)

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

   Is there continuity?

   YES 

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

   NO 

   Repair an open in the LIN/LIN (ACG) wire between the PCM (B50) and the DC-DC converter.