Integration Relay: Inspection

INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY

Fig 1: Integration Relay Circuit Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the EFI No. 1 fuse.

Remove the EFI No. 1 fuse.
Using an ohmmeter, measure the resistance of the fuse.
Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

Inspect the A/F fuse.

Remove the A/F fuse.
Using an ohmmeter, measure the resistance of the fuse.
Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
A/F fuse	Always	Below 1 Ω

Inspect the C/OPN relay.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
2E-13 - 2E-6	No battery voltage applied	10 kΩ or higher
2E-13 - 2E-6	Battery voltage applied to terminals 2E-6 and 2D-12	Below 1 Ω

NOTE: While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

Fig 2: Identifying C/OPN Relay

Inspect the A/F relay.

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

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
2A-4 - 2C-1	No battery voltage applied	10 kΩ or higher
2A-4 - 2C-1	Battery voltage applied to terminals 2E-10 and 2E-6	Below 1 Ω

NOTE: While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

Fig 3: Identifying A/F Relay