Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2002Q45 V8-4.5L (VK45DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSRECALLSCAMPAIGN - ACCELERATION HESITATION/DELAYSERVICE PROCEDURE STARTECM REPROGRAMMING (USING AN ECM ID CODE)
2002 Infiniti Q45 V8-4.5L (VK45DE)
ECM Reprogramming (Using an ECM ID Code)
2002 Infiniti Q45 V8-4.5L (VK45DE)SECTION ECM Reprogramming (Using an ECM ID Code)
IMPORTANT NOTES:
^ This bulletin uses a special ECM Reprogramming procedure.
^ In this procedure, an ECM ID CODE must be entered into ASIST (instead of a Model and Model Year) to get the right Reprogramming data.
^ Only use this "ECM I.D. Code" procedure for this procedure or the update will not work.

The following steps are used to obtain the ECM reprogramming data from ASIST using an ECM ID CODE. (ECM ID code is listed in Chart A shown)
^ If you do not know how to do ECM Reprogramming, Refer to the "Special ECM Reprogramming Procedure for ECM I.D. Entry" shown.
^ If you do know how to do ECM Reprogramming, continue with the following special reprogram steps using an ECM ID CODE.

1. Click on the Key Pad button (see Figure 4).

2. Using the digit keys on the Key Pad (see Figure 5 shown), enter ECM ID Code. See "Chart A", for the ECM ID Code.
3. Then click the "Continue" button on the keypad.

4. Click the "Continue" button on the ECM Data Reprogramming screen (see Figure 6) to proceed to CONSULT-II setup.
5. Perform ECM Reprogramming from CONSULT-II to update the car's ECM data (to the new Part Number).
6. When ECM Reprogramming is done, test drive the vehicle. See "Vehicle Test Drive" below.
Vehicle Test Drive
Test drive the vehicle with 1/8 throttle application (engine RPM less than 2000). The transmission should upshift through gears 1-2, 2-3, 3-4 and 4-5.

PARTS INFORMATION

CLAIMS INFORMATION
^ This bulletin uses a special ECM Reprogramming procedure.
^ In this procedure, an ECM ID CODE must be entered into ASIST (instead of a Model and Model Year) to get the right Reprogramming data.
^ Only use this "ECM I.D. Code" procedure for this procedure or the update will not work.
The following steps are used to obtain the ECM reprogramming data from ASIST using an ECM ID CODE. (ECM ID code is listed in Chart A shown)
^ If you do not know how to do ECM Reprogramming, Refer to the "Special ECM Reprogramming Procedure for ECM I.D. Entry" shown.
^ If you do know how to do ECM Reprogramming, continue with the following special reprogram steps using an ECM ID CODE.
1. Click on the Key Pad button (see Figure 4).
2. Using the digit keys on the Key Pad (see Figure 5 shown), enter ECM ID Code. See "Chart A", for the ECM ID Code.
3. Then click the "Continue" button on the keypad.
4. Click the "Continue" button on the ECM Data Reprogramming screen (see Figure 6) to proceed to CONSULT-II setup.
5. Perform ECM Reprogramming from CONSULT-II to update the car's ECM data (to the new Part Number).
6. When ECM Reprogramming is done, test drive the vehicle. See "Vehicle Test Drive" below.
Vehicle Test Drive
Test drive the vehicle with 1/8 throttle application (engine RPM less than 2000). The transmission should upshift through gears 1-2, 2-3, 3-4 and 4-5.
PARTS INFORMATION
CLAIMS INFORMATION
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.