DTC P064A

DTC P064A  : High Pressure Fuel Pump System Malfunction

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

DTC (PGM-FI)

1. Problem verification

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Start the engine.

   NOTE:  If the engine does not start without keyless access system, keep cranking for 20 seconds.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P064A High Pressure Fuel Pump System Malfunction

   Is DTC P064A indicated?

   YES 

   The failure is duplicated. 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 - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System .

2. Engine starting check

   - 1. Check the result in step 1-3.

   Did the engine start?

   YES 

   Go to step 11.

   NO 

   Go to step 3.

3. Relay check

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

   - 2. Remove the injector relay (A) from the under-hood fuse/relay box.

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   - 3. Test the injector relay.

   Is the relay OK?

   YES 

   Go to step 4.

   NO 

   Replace the injector relay.

4. Open wire check (IGP line)

   - 1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket No. 3
   Test point 2	Body ground

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   Is there battery voltage?

   YES 

   Go to step 5.

   NO 

   Repair an open in the IGP wire between the relay circuit board and the injector relay.

5. Determine possible failure area (+B INJ line, others)

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

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

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket No. 1
   Test point 2	Body ground

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   Is there battery voltage?

   YES 

   Go to step 7.

   NO 

   Go to step 6.

6. Fuse check

   - 1. Check the following fuse.

   Fuse	No. A12 (20 A)
   Location	Under-hood fuse/relay box

   Is the fuse OK?

   YES 

   Repair an open in the +B INJ wire between the injector relay and the No. A12 (20 A) fuse.

   NO 

   Check for a short in the +B INJ wire or the INJ RLY OUT/IG (EDU) wire between the injector control module and the No. A12 (20 A) fuse, and repair it if needed. Also replace the No. A12 (20 A) fuse.

7. Determine possible failure area (INJ RLY line, others)

   - 1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Injector relay: disconnected
   Test point 1	Injector relay 4P socket No. 3
   Test point 2	Injector relay 4P socket No. 4

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   Is there any voltage?

   YES 

   Go to step 9.

   NO 

   Go to step 8.

8. Open wire check (INJ RLY 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 A (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	Injector relay 4P socket No. 4
   Test point 2	PCM connector A (51P) No. 17 - Refer to: PCM Connector for Inputs and Outputs (16-18, 9-Speed A/T), or PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021), or PCM Connector for Inputs and Outputs (16-20 6-Speed A/T)

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   Is there continuity?

   YES 

   The INJ RLY wire is OK. Check for poor connections or loose terminals at the injector relay, the injector control module, the high pressure fuel pump, and the PCM. If DTC P064A was indicated, substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T), or PCM Removal and Installation (19-21 9-Speed A/T) , then recheck. If DTC P064A goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation (19-21 9-Speed A/T), or PCM Removal and Installation (6-Speed A/T, 16-18 9-Speed A/T) .

   NO 

   Repair an open in the INJ RLY wire between the PCM (A17) and the injector relay.

9. Open wire check (INJ RLY OUT/IG (EDU)1 line)

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

   - 2. Disconnect the following connector.

   Injector control module connector D (4P)

   - 3. Connect terminals A and B with a jumper wire.

   Terminal A	Injector relay 4P socket No. 1
   Terminal B	Injector relay 4P socket No. 2

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

   Test condition	Vehicle OFF (LOCK) mode
   	Injector relay: disconnected
   	Injector control module connector D (4P): disconnected
   Injector relay 4P socket No. 1 and No. 2: jumped
   Test point 1	Injector control module connector D (4P) No. 1
   Test point 2	Body ground

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   Is there battery voltage?

   YES 

   Go to step 10.

   NO 

   Repair an open in the INJ RLY OUT/IG (EDU)1 wire between the injector relay and the injector control module.

10. Open wire check (INJ RLY OUT/IG (EDU)2 line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector relay: disconnected
    	Injector control module connector D (4P): disconnected
    Injector relay 4P socket No. 1 and No. 2: jumped
    Test point 1	Injector control module connector D (4P) No. 2
    Test point 2	Body ground

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    Is there any voltage?

    YES 

    Go to step 11.

    NO 

    Repair an open in the INJ RLY OUT/IG (EDU)2 wire between the injector relay and the injector control module.

11. Open wire check (HPTI line)

    - 1. If needed, remove the jumper wire from injector relay 4P socket, then reinstall the injector relay.

    - 2. If needed, reconnect the following connector.

    Injector control module connector D (4P)

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

    - 4. Disconnect the following connectors.

    Injector control module connector C (12P)

    PCM connector C (51P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    Test point 1	Injector control module connector C (12P) No. 8
    Test point 2	PCM connector C (51P) No. 51 - Refer to: PCM Connector for Inputs and Outputs (16-18, 9-Speed A/T), or PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021), or PCM Connector for Inputs and Outputs (16-20 6-Speed A/T)

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    Is there continuity?

    YES 

    Go to step 12.

    NO 

    Repair an open in the HPTI wire between the PCM (C51) and the injector control module.

12. Open wire check (FPF line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    Test point 1	Injector control module connector C (12P) No. 7
    Test point 2	PCM connector C (51P) No. 50 - Refer to: PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021), or PCM Connector for Inputs and Outputs (16-20 6-Speed A/T), or PCM Connector for Inputs and Outputs (16-18, 9-Speed A/T)

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    Is there continuity?

    YES 

    Go to step 13.

    NO 

    Repair an open in the FPF wire between the PCM (C50) and the injector control module.

13. Determine possible failure area (open in FP+B1/HP+B1 line or FP-B1/HP-B1 line, others)

    - 1. Disconnect the following connector.

    Injector control module connector D (4P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    Injector control module connector D (4P): disconnected
    Test point 1	Injector control module connector D (4P) No. 3
    Test point 2	Injector control module connector D (4P) No. 4

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    Is there continuity?

    YES 

    Go to step 16.

    NO 

    Go to step 14.

14. Open wire check (FP+B1/HP+B1 line)

    - 1. Disconnect the following connector.

    High pressure fuel pump 2P connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	High pressure fuel pump 2P connector No. 1
    Test point 2	Injector control module connector D (4P) No. 3

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    Is there continuity?

    YES 

    Go to step 15.

    NO 

    Repair an open in the FP+B1/HP+B1 wire between the high pressure fuel pump and the injector control module.

15. Open wire check (FP-B1/HP-B1 line)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	High pressure fuel pump 2P connector No. 2
    Test point 2	Injector control module connector D (4P) No. 4

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    Is there continuity?

    YES 

    Check for poor connections or loose terminals at the injector relay, the injector control module, the high pressure fuel pump, and the PCM. Substitute a known-good injector control module , then recheck. If DTC P064A goes away and the injector control module was substituted, replace the original injector control module .

    NO 

    Repair an open in the FP-B1/HP-B1 wire between the high pressure fuel pump and the injector control module.

16. Shorted wire check (HPTI line to power)

    - 1. Turn the vehicle to the ON mode.

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

    Test condition	Vehicle ON mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    Test point 1	Injector control module connector C (12P) No. 8
    Test point 2	Body ground

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    Is there any voltage?

    YES 

    Repair a short to power in the HPTI wire between the PCM (C51) and the injector control module.

    NO 

    Go to step 17.

17. Shorted wire check (FPF line to power)

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

    Test condition	Vehicle ON mode
    	Injector control module connector C (12P): disconnected
    	PCM connector A (51P): disconnected
    	Injector control module connector D (4P): disconnected
    Test point 1	Injector control module connector C (12P) No. 7
    Test point 2	Body ground

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    Is there any voltage?

    YES 

    Repair a short to power in the FPF wire between the PCM (C50) and the injector control module.

    NO 

    Go to step 18.

18. Shorted wire check (FP+B1/HP+B1 line to power)

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

    - 2. Disconnect the following connector.

    High pressure fuel pump 2P connector

    - 3. Turn the vehicle to the ON mode.

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

    Test condition	Vehicle ON mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector D (4P) No. 3
    Test point 2	Body ground

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    Is there any voltage?

    YES 

    Repair a short to power in the FP+B1/HP+B1 wire between the high pressure fuel pump and the injector control module.

    NO 

    Go to step 19.

19. Shorted wire check (FP-B1/HP-B1 line to power)

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

    Test condition	Vehicle ON mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector D (4P) No. 4
    Test point 2	Body ground

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    Is there any voltage?

    YES 

    Repair a short to power in the FP-B1/HP-B1 wire between the high pressure fuel pump and the injector control module.

    NO 

    Go to step 20.

20. Shorted wire check (HPTI line to ground)

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

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector C (12P) No. 8
    Test point 2	Body ground

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    Is there continuity?

    YES 

    Repair a short to ground in the HPTI wire between the PCM (C51) and the injector control module.

    NO 

    Go to step 21.

21. Shorted wire check (FPF line to ground)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector C (12P) No. 7
    Test point 2	Body ground

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    Is there continuity?

    YES 

    Repair a short to ground in the FPF wire between the PCM (C50) and the injector control module.

    NO 

    Go to step 22.

22. Shorted wire check (FP+B1/HP+B1 line to ground)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector D (4P) No. 3
    Test point 2	Body ground

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    Is there continuity?

    YES 

    Repair a short to ground in the FP+B1/HP+B1 wire between the high pressure fuel pump and the injector control module.

    NO 

    Go to step 23.

23. Shorted wire check (FP-B1/HP-B1 line to ground)

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

    Test condition	Vehicle OFF (LOCK) mode
    	Injector control module connector C (12P): disconnected
    	PCM connector C (51P): disconnected
    	Injector control module connector D (4P): disconnected
    	High pressure fuel pump 2P connector: disconnected
    Test point 1	Injector control module connector D (4P) No. 4
    Test point 2	Body ground

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    Is there continuity?

    YES 

    Repair a short to ground in the FP-B1/HP-B1 wire between the high pressure fuel pump and the injector control module.

    NO 

    Substitute a known-good injector control module , then recheck. If DTC P064A goes away and the injector control module was substituted, replace the original injector control module .