Integration Relay: Inspection

INSPECT INTEGRATION RELAY

Inspect the EFI (15A) fuse.

Disconnect the fuse.

Using an ohmmeter, measure the resistance of the fuse.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Connection	Specified Condition
T2 - T6	Always	Blow 1 Ω

Inspect the EFI relay.

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Connection	Specified Condition
B1 - C1	When battery voltage absent	Blow 1 Ω
B1 - B4	When battery voltage absent	10 kΩ or higher
B4 - C1	When battery voltage absent	10 kΩ or higher
B1 - B4	When battery voltage applied to terminals B6 and B7	Blow 1 Ω
B4 - C1	When battery voltage applied to terminals B6 and B7	Blow 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 1: Identifying Integration Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the IG2 relay.

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Connection	Specified Condition
A1 - A4	When battery voltage absent	10 kΩ or higher
A1 - A4	When battery voltage applied to terminal B2 and B3	Blow 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 IG2 Relay Connector Terminals