DTC P1D99 (228)

DTC P1D99  : PCU Electric Coolant Pump

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (Electric Powertrain)

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.

   -5. Select the ELECTRIC WATER PUMP TEST in the Electric Powertrain FUNCTION TEST with the HDS. Then do the START.

   Electric Water Pump Test

   -6. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P1D99 PCU Electric Coolant Pump

   Is DTC P1D99 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure. The system is OK at this time. 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. Fuse check

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

   -2. Check the following fuse.

   Fuse

   No. A13

   Is the fuse OK?

   YES 

   Go to step 3.

   NO 

   Replace the No. A13 fuse. Also check for a short to ground on the No. A13 fuse circuit if needed.

3. Relay check

   -1. Remove the PCU electric coolant pump relay .

   -2. Test the PCU electric coolant pump relay .

   Is the relay OK?

   YES 

   Go to step 4.

   NO 

   Replace the PCU electric coolant pump relay.

4. Open wire check (IGA line)

   -1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	PCU electric coolant pump relay: disconnected
   Test point 1	PCU electric coolant pump relay 4P socket (female terminals) No. 3:

   Test point 2

   Body ground

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

   Is there battery voltage?

   YES 

   Go to step 5.

   NO 

   Repair an open in the IGA wire between the PCU electric coolant pump relay and the IGHLD1 relay.

5. Open wire check (PCU_EWP_RLY_OUT line)

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

   -2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU electric coolant pump relay: disconnected
   	PCU electric coolant pump 4P connector: disconnected
   Test point 1	PCU electric coolant pump relay 4P socket (female terminals) No. 2:
   Test point 2	PCU electric coolant pump 4P connector (female terminals) No. 4:

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

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

   Is there 1.0 Ω or less?

   YES 

   Go to step 6.

   NO 

   Repair an open in the PCU_EWP_RLY_OUT wire between the PCU electric coolant pump relay and the PCU electric coolant pump.

6. Open wire check (PCU_EWP_RLY_CL-/IG_PCU_EWP line)

   -1. Do the 12 volt battery terminal disconnection procedure .

   -2. Disconnect the following connector.

   PCU 33P connector

   -3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU electric coolant pump relay: disconnected
   	PCU electric coolant pump 4P connector: disconnected
   	PCU 33P connector: disconnected
   Test point 1	PCU electric coolant pump relay 4P socket (female terminals) No. 4:
   Test point 2	PCU 33P connector (female terminals) No. 33

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

   Is there 1.0 Ω or less?

   YES 

   Go to step 7.

   NO 

   Repair an open in the PCU_EWP_RLY_CL-/IG_PCU_EWP wire between the PCU electric coolant pump relay and the PCU.

7. Open wire check (PCU_W/P_NEWP/NEWP line)

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

   -2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU electric coolant pump relay: disconnected
   	PCU electric coolant pump 4P connector: disconnected
   	PCU 33P connector: disconnected
   Test point 1	PCU electric coolant pump 4P connector (female terminals) No. 2:
   Test point 2	PCU 33P connector (female terminals) No. 7

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

   Is there 1.0 Ω or less?

   YES 

   Go to step 8.

   NO 

   Repair an open in the PCU_W/P_NEWP/NEWP wire between the PCU electric coolant pump and the PCU.

8. Shorted wire check (PCU_W/P_NEWP/NEWP line)

   -1. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU electric coolant pump relay: disconnected
   	PCU electric coolant pump 4P connector: disconnected
   	PCU 33P connector: disconnected
   Test point 1	PCU electric coolant pump 4P connector (female terminals) No. 2:

   Test point 2

   Body ground

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

   Is there 1 MΩ or more?

   YES 

   Replace the PCU electric coolant pump , then recheck. If DTC P1D99 is still indicated, replace the PCU .

   NO 

   Repair a short to ground in the PCU_W/P_NEWP/NEWP wire between the PCU electric coolant pump and the PCU.