Integration Relay - Inspection

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM

INTEGRATION RELAY - INSPECTION

1. INSPECT INTEGRATION RELAY
  • NOTICE:
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 procedures.

Integration Relay - Inspection. 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Integration Relay - Inspection. 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Measure the resistance of the C/OPN relay.

Using an ohmmeter, measure the resistance between terminal.

  • Standard resistance:
  • Tester ConnectionSpecified Condition
    2B-5 - 2B-810 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:
  • Tester ConnectionSpecified Condition
    2B-7 - 2B-810 - 14V
Integration Relay - Inspection. 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Measure the resistance of the EFI MAIN relay.

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

  • Standard resistance:
  • Tester ConnectionSpecified Condition
    EFI fuse terminal 2 - 2A-810 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:
  • Tester ConnectionSpecified Condition
    EFI fuse terminal 2 - terminal 2A-8Below 1 Ω
Integration Relay - Inspection. 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

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:
  • Tester ConnectionSpecified Condition
    F-PMP fuse terminal 2 - 2B-410 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:
  • Tester ConnectionSpecified Condition
    F-PMP fuse terminal 2 - 2B-4Below 1 Ω
Integration Relay - Inspection. 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Measure the resistance of the EFI INJ relay.

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

  • Standard resistance:
  • Tester ConnectionSpecified Condition
    INJ fuse terminal 2 - 2A-410 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:
  • Tester ConnectionSpecified condition
    INJ fuse terminal 2 - terminal 2A-4Below 1 Ω