DTC Troubleshooting: P16F5
DTC P16F5: Starter Cut Relay 1 Control Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P16F5 Starter Cut Relay 1 Control Circuit High Voltage
   

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P16F5 Starter Cut Relay 1 Control Circuit High Voltage
   

Is DTC P16F5 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 relay circuit board (starter cut relay 1 circuit) 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.
Relay circuit board check:

Relay circuit board check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove and test the relay circuit board.

Is the relay circuit board OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Shorted wire check (ST CUT RLY1 CL- line to power):

Shorted wire check (ST CUT RLY1 CL- line to power)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.


?2.
Disconnect the following connector.
PCM connector A (50P)

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Relay circuit board: removed
PCM connector A (50P): disconnected
Test point 1
PCM connector A (50P) No. 15
Test point 2
Body ground

Is there 0.1 V or less?

     
YES
     
     
     
The ST CUT RLY1 CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P16F5 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair a short to power in the ST CUT RLY1 CL- wire between the PCM (A15) and the relay circuit board.?