Integration Relay: Inspection: Inspection

INSPECT INTEGRATION NO. 1 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.
The internal circuit of the integration relay is as shown in the illustration. Inspect the integration relay using the following procedure.

Fig 1: Identifying Internal Relay (Unit A) Inner Diagram
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Measure the resistance of the C/OPN relay.

Fig 2: Identifying Internal Relay Backside of the C/OPN Relay

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Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Connect a battery positive (+) lead to terminals 2B-5 and negative (-) lead to terminal 2B-7. Using an voltmeter, measure the voltage according to the value(s) in the table below.

Standard Voltage

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

Measure the resistance of the EFI MAIN relay.

Fig 3: Identifying Internal Relay Backside of the EFI MAIN Relay

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Remove the EFI fuse. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Connect a battery positive (+) lead to terminal 2A-6 and negative (-) lead to terminal 2A-7. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Measure the resistance of the EFI NO. 2 relay.

Fig 4: Identifying Internal Relay Backside of the EFI NO. 2 relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Remove the F/PMP fuse. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Connect a battery positive (+) lead to terminal 2A-8 and negative (-) lead to terminal 2B-3. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Measure the resistance of the EFI INJ relay.

Fig 5: Identifying Internal Relay Backside of the EFI INJ Relay

Remove the INJ fuse. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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

Connect a battery positive (+) lead to terminal 2A-2 and negative (-) lead to terminal 2A-3. Using an ohmmeter, measure the resistance according to the value(s) in the table below.

Standard Resistance

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