IS 250C V6-2.5L (4GR-FSE) (2011)
Main Relay (Computer/Fuel System): Testing and Inspection
Integration Relay
4GR-FSE ENGINE CONTROL: INTEGRATION RELAY: INSPECTION
1. INSPECT INTEGRATION NO.1 RELAY
NOTICE:
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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.
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The internal circuit of the integration relay is as shown in the illustration. Inspect the integration relay using the following
procedure.
(a) Measure the resistance of the C/OPN relay.
(1) Using an ohmmeter, measure the resistance between terminal.
Standard Resistance:
(2) Connect a battery 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.