This procedure guides replacement of the fuel pump relay, which controls power to the fuel pump. The relay is located in the engine compartment fuse/relay box.

Warnings

Tools required

Parts

• Fuel pump relay × 1 — Use OEM specification - Toyota 90987-02028 or equivalent

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition to OFF position and remove key
3. Open hood and secure with prop rod
4. Disconnect negative (-) battery terminal and isolate cable away from terminal
5. Wait 3 minutes for electrical system capacitors to discharge
6. Locate engine compartment fuse/relay box on driver's side near battery
7. Identify fuel pump relay position using diagram on underside of fuse box cover (typically marked 'EFI' or 'FUEL PUMP')

Procedure

1. 1

   Remove fuse box cover
   Release the clips securing the engine compartment fuse/relay box cover. On 2012-2017 Camry, there are typically two to four tabs on the sides of the cover. Press tabs inward while lifting cover straight up. Set cover aside with diagram facing up for reference.
2. 2

   Identify and photograph relay location
   Locate the fuel pump relay using the diagram on the fuse box cover. The relay is typically labeled 'EFI MAIN' or 'FUEL PUMP' and is usually a larger relay with 4 pins. Take a photo of the relay box layout before removal to ensure correct reinstallation position.
3. 3

   Remove old fuel pump relay
   Grasp the relay firmly and pull straight up with steady pressure. If relay is difficult to remove, use a relay puller tool or needle-nose pliers to gently rock the relay side-to-side while pulling upward. Do not bend or damage the socket terminals. Inspect removed relay for signs of burning, melting, or corrosion.
4. 4

   Inspect relay socket
   Examine the relay socket terminals for corrosion, burning, or damage. Terminals should be clean and springy. If socket shows heat damage (melted plastic, discolored terminals), the socket assembly may need replacement - consult a professional. Use compressed air or dry cloth to remove any debris from socket cavity.
5. 5

   Verify new relay specifications
   Compare new relay to old relay. Verify pin configuration, amperage rating, and physical dimensions match exactly. The relay should have same number of terminals in same positions. Toyota OEM relays are recommended as aftermarket relays may have different internal resistance causing premature failure.
6. 6

   Install new fuel pump relay
   Align the new relay pins with the socket terminals. Ensure correct orientation by matching any alignment tabs or asymmetric pin spacing. Push relay straight down into socket with firm, even pressure until it seats completely flush with surrounding relays. Relay should click into place and sit level with no rocking movement.
   Torque spec

   Relay Socket5 Nm (4 lb-ft)
7. 7

   Reinstall fuse box cover
   Position the fuse box cover over the relay box, aligning all tabs with their corresponding slots. Press down firmly on all edges until all clips engage with audible clicks. Tug gently on cover to verify it is fully secured.
8. 8

   Reconnect battery
   Reconnect negative battery cable to negative battery terminal. Tighten terminal bolt securely using 10mm socket. Ensure cable cannot move or vibrate loose.
   Torque spec

   Terminal Bolts7 Nm (5 lb-ft)

Reassembly

1. Ensure fuse box cover is completely seated with all clips engaged
2. Verify no tools or parts are left in engine compartment
3. Close hood securely

Verification

• Turn ignition to ON position (do not start engine) - listen for fuel pump priming sound (2-3 second whirring noise from rear of vehicle)
• If fuel pump does not prime, turn ignition OFF, wait 10 seconds, and try again
• Start engine and verify it starts normally without extended cranking
• Allow engine to idle for 2 minutes and verify stable operation with no stalling
• Turn engine off and restart to confirm fuel pump relay operates reliably on subsequent starts
• If Check Engine Light illuminates or engine runs poorly, use OBD-II scanner to check for fuel system codes
• Test drive vehicle in safe area to verify normal acceleration and no hesitation under load
• If problems persist after relay replacement, fuel pump, wiring harness, or ECM may require professional diagnosis

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