Toyota Harrier ASU60 ASU65 Fuel Pump Wiring Diagram

[Roland.O]

This diagram is essential for circuit tracing, power and ground verification and connector identification accross the fuel delivery network. It gives the wiring and control lines running between the ECM, fuel pump ECU assembly(Q29) and the fuel pump assembly (D64) enabling accurate pulse width modulation(PWM) and duty cycle command tracking. Without this OEM diagram, you can easily misdiagnose an ECM issue as a mechanical pump failure thereby replacing unnecessary parts. You can also damage the fuel pump ECU if proper procedures are not followed.

Common questions that this diagram answers​

1. What is the connector pinout chart for the Toyota Harrier ASU60/ASU65 fuel pump ECU Q29?
2. How do I test the fuel pump assembly D64 control lines on a Toyota Harrier ASU60/ASU65?
3. What are the wire colours for the fuel pump control ECU harness on a Toyota Harrier 8AR-FTS?
4. How do you isolate a fault between the main engine ECM and the fuel pump controller on a Toyota Harrier ASU60/ASU65?

How to access the diagram​

Click on the link below to access the complete OEM Manual, within it you will find the Fuel Pump Wiring Diagram. I have given the screenshot below to help you quickly navigate to the section where the diagram is located. Once you find it, you can then print or save it. Let me know if you face any challenges or have any questions and I will be happy to answer in the thread below. Please note that the year in the document is not the YOM but the document release date so it covers the entire model range. Also note the document applies to all countries where the model is sold Including Singapore, Australia, Malaysia, Kenya, UK, New Zealand, etc.