Toyota Tundra Service Manual: Efi Relay

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. REMOVE INTEGRATION RELAY

2. INSPECT INTEGRATION RELAY (EFI)

NOTICE:

Some relays are built into the integration relay. The integration relay cannot be disassembled. If there is a malfunction in the circuit of the integration relay, replace the integration relay.
The internal circuit of the integration relay is as shown in the illustration below. Inspect the integration relay using the following procedures.

(a) Measure the resistance of the EFI No. 1 fuse.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
EFI NO. 1 fuse	Always	Below 1 Ω

If the result is not as specified, replace the EFI No. 1 fuse.

(b) Measure the resistance of the EFI relay.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

1C-1 - 1B-4

1C-1 - 1B-5

When battery voltage is not applied to terminals 1B-2 and 1B-3

10 kΩ or higher

When battery voltage is applied to terminals 1B-2 and 1B-3

Below 1 Ω

If the result is not as specified, replace the integration relay.

3. INSTALL INTEGRATION RELAY

Toyota Tundra Service Manual > Front Power Seat Control System(w/ Memory): Wireless-linked Return Function does not Operate
DESCRIPTION When a door is unlocked by the wireless unlock function, the main body ECU (multiplex network body ECU) receives the door unlock signal and it stores the key ID. When the driver door is opened, the memory call and memory command information of the stored key ID is sent to each driving po ...

Toyota Tundra Owners Manual