Main Relay (Computer/Fuel System): Testing and Inspection

4GR-FSE ENGINE CONTROL SYSTEM: INTEGRATION RELAY: INSPECTION

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.









(a) Measure the resistance of the C/OPN relay.
(1) Using an ohmmeter, measure the resistance between terminal.
Standard resistance:





(2) 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:










(b) Measure the resistance of the EFI MAIN relay.
(1) Remove the EFI fuse. Using an ohmmeter, measure the resistance between the terminals.
Standard resistance:





(2) 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:










(c) Measure the resistance of the EFI NO. 2 relay.
(1) Remove the F/PMP fuse. Using an ohmmeter, measure the resistance between the terminals.
Standard resistance:





(2) 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:










(d) Measure the resistance of the EFI INJ relay.
(1) Remove the INJ fuse. Using an ohmmeter, measure the resistance between the terminals.
Standard resistance:





(2) 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: