Integration Relay: Inspection

INSPECT INTEGRATION RELAY

NOTE:

Some relays are built into the integration relay (unit: A). The integration relay cannot be disassembled. If there is a malfunction in the circuit of the integration relay, replace the integration relay.

Fig 1: Identifying Integration Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
The internal circuit of the integration relay is as shown in the illustration. Inspect the integration relay using the following procedures.

Fig 2: Integration Relay Internal Circuit Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the C/OPN relay.

Using an ohmmeter, measure the resistance between terminal.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
2B-5 - 2B-8	10 kΩ or higher

Connect the battery's positive (+) lead to terminals 2B-5 and negative (-) lead to terminal 2B-7. Using an voltmeter, measure the resistance between terminal.

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Specified Condition
2B-7 - 2B-8	10 - 14V

Fig 3: Identifying Integration Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the EFI MAIN relay.

Remove the EFI fuse. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
EFI fuse terminal 2 - 2A-8	10 kΩ or higher

Connect the battery's positive (+) lead to terminal 2A-6 and negative (-) lead to terminal 2A-7. Using an ohmmeter, measure the resistance between terminal.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
EFI fuse terminal 2 - terminal 2A-8	Below 1 Ω

Fig 4: Identifying Integration Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the EFI NO. 2 relay.

Remove the F/PMP fuse. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
F - PMP fuse terminal 2 - 2B-4	10 kΩ or higher

Connect the battery's positive (+) lead to terminal 2A-8 and negative (-) lead to terminal 2B-3. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
F - PMP fuse terminal 2 - 2B-4	Below 1 Ω

Fig 5: Identifying F/PMP Fuse And Integration Relay Connector Terminals

Measure the resistance of the EFI INJ relay.

Remove the INJ fuse. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
INJ fuse terminal 2 - 2A-4	10 kΩ or higher

Connect the battery's positive (+) lead to terminal 2A-2 and negative (-) lead to terminal 2A-3. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified condition
INJ fuse terminal 2 - terminal 2A-4	Below 1 Ω

Fig 6: Identifying INJ Fuse And Integration Relay Connector Terminals