Circuit Opening Relay - Toyota 4-Runner 1985 Repair Manual

Voltmeter
Fp
EFI SYSTEM - Electronic Control System
FI-65
Circuit Opening Relay
Ignition Switch ST
1
- ....... - - ECUSTA
Main
Relav--~----
ECU +8
Air Valve
+8
Fp
~
STA
E1
Circuit
Opening
Relay
_ 6 - _ ~
Fuel
Pump
..c
U
0.>-
E
0
c:
~[
Fuel Pump
Q)
§
Switch
...... 0 - -....
~ 0
u..
U
Air Flow Meter
FI0034
INSPECTION OF CIRCUIT OPENING RELAY
1. CHECK CIRCUIT OPENING RELAY OPERATION
(a) Remove the left kick panel.
(b) Using a voltmeter, check that the meter indicates
voltage at Fp terminal during engine cranking and
running.
(c) Stop the engine.
Fc +8 STA
El
2. MEASURE RESISTANCE OF CIRCUIT OPENING RELAY
(a) Disconnect the connector.
(b) Measure the resistance between each terminal.
Between terminals Resistance
(0)
STA -
E1
17 -
25
+8 - Fe
88 - 132
+8 - Fp Infinity