DTC P16BF: Starter Cut Relay STRLY Circuit Malfunction (2013-18)

NOTE:  Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18) .

DTC (PGM-FI)

1. Determine possible failure area (STRLY circuit short to power, STRLY circuit short to ground):

   Press the engine start/stop button to select the ON mode.

   - 2. Clear the DTC with the HDS - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18) , and wait 5 seconds.

   Clear DTC

   - 3. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   STARTER RELAY CONTROL RETURN	OFF

   Do the current condition(s) match the threshold?

   YES 

   Go to step 2.

   NO 

   Go to step 6.

2. Problem verification:

   Press the engine start/stop button to select the START mode, for 5 seconds or more.

   - 2. While holding the engine start/stop button to select the START mode, check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   STARTER RELAY CONTROL RETURN	OFF

   Do the current condition(s) match the threshold?

   YES 

   The failure is duplicated. Go to step 3.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM.

3. Relay check (starter cut relay 1):

   Press the engine start/stop button to select the OFF mode.

   - 2. Remove starter cut relay 1 (A) from under-dash relay holder B.

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

   - 3. Test starter cut relay 1 - Refer to: Power Relay Test (2013-15), or Power Relay Test (2016-18) .

   Is the relay OK?

   YES 

   Starter cut relay 1 is OK. Go to step 4.

   NO 

   Replace starter cut relay 1, then do the repair verification.

4. Relay check (starter cut relay 2):

   Remove starter cut relay 2 (A) from the under-dash fuse/relay box.

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

   - 2. Test starter cut relay 2 - Refer to: Power Relay Test (2013-15), or Power Relay Test (2016-18) .

   Is the relay OK?

   YES 

   Starter cut relay 2 is OK. Go to step 5.

   NO 

   Replace starter cut relay 2, then do the repair verification.

5. Shorted wire check (STRLY line):

   Jump the SCS line with the HDS.

   SCS short

   - 2. Disconnect the following connector.

   PCM connector A (49P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18)

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

   Test condition	OFF mode
   	Starter cut relay 1: disconnected
   	Starter cut relay 2: disconnected
   	PCM connector A (49P): disconnected
   Test circuit	STRLY
   Test point 1	PCM connector A (49P) No. 3 (WHT)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the STRLY wire between the PCM (A3) and starter cut relay 1 or starter cut relay 2, then do the repair verification.

   NO 

   The STRLY wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2013-15), or PCM Removal and Installation (2016-18) , then do the repair verification.

6. Relay check (starter cut relay 1):

   Press the engine start/stop button to select the OFF mode.

   - 2. Remove starter cut relay 1 (A) from under-dash relay holder B.

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

   - 3. Test starter cut relay 1 - Refer to: Power Relay Test (2013-15), or Power Relay Test (2016-18) .

   Is the relay OK?

   YES 

   Starter cut relay 1 is OK. Go to step 7.

   NO 

   Replace starter cut relay 1, then do the repair verification.

7. Relay check (starter cut relay 2):

   Remove starter cut relay 2 (A) from the under-dash fuse/relay box.

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

   - 2. Test starter cut relay 2 - Refer to: Power Relay Test (2013-15), or Power Relay Test (2016-18) .

   Is the relay OK?

   YES 

   Starter cut relay 2 is OK. Go to step 8.

   NO 

   Replace starter cut relay 2, then do the repair verification.

8. Shorted wire check (STRLY line to power):

   Jump the SCS line with the HDS.

   SCS short

   - 2. Disconnect the following connector.

   PCM connector A (49P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18)

   - 3. Press the engine start/stop button to select the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	ON mode
   	Starter cut relay 1: disconnected
   	Starter cut relay 2: disconnected
   	PCM connector A (49P): disconnected
   Test circuit	STRLY
   Test point 1	PCM connector A (49P) No. 3 (WHT)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Repair a short to power in the STRLY wire between the PCM (A3) and starter cut relay 1 or starter cut relay 2, then do the repair verification.

   NO 

   The STRLY wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2013-15), or PCM Removal and Installation (2016-18) , then do the repair verification.

9. Repair verification:1.

   Press the engine start/stop button to select the OFF mode.

   - 2. Reconnect all connectors.

   - 3. Exit the SCS mode with the HDS.

   SCS Open

   - 4. Press the engine start/stop button to select the ON mode.

   - 5. Reset the PCM with the HDS - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18) .

   Reset PCM

   - 6. Do the PCM idle learn procedure .

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P16BF Starter Cut Relay STRLY Circuit Malfunction

   DTC (PGM-FI)

   Is DTC P16BF indicated?

   YES 

   Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM - Refer to: PCM Removal and Installation (2013-15), or PCM Removal and Installation (2016-18) , then recheck. If the PCM was substituted, go to step 1.

   NO 

   If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (2013-15), or PCM Removal and Installation (2016-18) . If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.