Integration Relay: Inspection

INSPECT INTEGRATION RELAY

Inspect the EFI fuse.

Disconnect the fuse.

Using an ohmmeter, measure the resistance of the fuse.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
EFI fuse	Always	Below 1 Ω

Inspect the EFI relay.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
A1 - C1	When battery voltage absent	Below 1 Ω
A1 - A4	When battery voltage absent	10 kΩ or higher
A4 - C1	When battery voltage absent	10 kΩ or higher
A1 - A4	Apply battery voltage between terminals A2 and A3	Below 1 Ω
A4 - C1	Apply battery voltage between terminals A2 and A3	Below 1 Ω

Fig 1: Identifying Integration Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Inspect the cooling fan relay.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Resistance
B5-B8	When battery voltage absent	10 kΩ or higher
B5-B8	When battery voltage applied to terminals B6 and B7	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 Cooling Fan Relay Connector Terminals

Inspect the IG2 relay.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Resistance
B1 - B4	When battery voltage absent	10 kΩ or higher
B1 - B4	When battery voltage applied to terminals B2 and B3	Below 1 Ω

Fig 3: Identifying IG2 Relay Connector Terminals