Efi Main Relay; Inspection Of Efi Main Relays; Check Operation Of Main Relays - Toyota MR2 1988 Repair Manual

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EFI SYSTEM - Electronic Control System
.,.
I
Fuse
AM
2
7.5A
Ignition Switch
Fusible Link
1
Battery
I
I
FI0967
EFI Main Relay
Main Relay
3
ECU
FI0966
INSPECTION OF EFI MAIN RELAYS
1. CHECK OPERATION OF MAIN RELAYS
Turn the ignition switch ON. At this time an operation
noise will occur from the relay.
2. INSPECT RELAY CONTINUITY
(a) Check that there is continuity between terminals
and 3.
(b) Check that there is no continuity between terminals 2
and 4.
(c) Check that there is no continuity between terminals 3
and 4.
If continuity is not as specified, replace the relay.
3. INSPECT RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 3.
(b) Check that there is continuity between terminals 2
and 4.
If operation is not as specified, replace the relay.