Toyota 7M-GE Repair Manual page 175

jS EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (MS)
-.
0
"B"
Fl294.
ECU
EFI SYSTEM CHECK PROCEDURE
._
PREPARATION
(a) Disconnect the connectors from the ECU.
(b) Remove the locks as shown in the illustration so that
the tester probe(s) can easily come in.
CAUTION: Pay attention to sections "A" and "B" in
the illustration which can be easily broken,
(c) Reconnect the connectors to the ECU.
NOTE:
0 Perform ail voltage measurements with the connectors
connected.
0 Verify that the battery voltage is 1 IV or above when
the ignition switch is at "ON".
Using a voltmeter with high-impedance (10 kQ/V mihimum),
measure the voltage at each terminal of the wiring con-
nectors.
Terminals of ECU
rmbol
Terminal Name Symbol Terminal Name
Symbol Terminal Name
EOI POWER GROUND NE DISTRIBUTOR ACPS A/C PRESSURE SWITCH
co2 POWER GROUND El COMPUTER GROUND SPD SPEEDOMETER
o. 10 INJECTOR (No. 1 and 4) VF CHECK CONNECTOR ECT ECT COMPUTER
o. 30 INJECTOR (No. 3 and 5)
GO
DISTRIBUTOR ACR A/C COMPRESSOR
o. 20 INJECTOR (No. 2 and 6)
TE2 CHECK CONNECTOR Ll
ECT COMPUTER
ELS
DEFOGGER SWITCH
HEADLIGHT SWITCH
TEl CHECK CONNECTOR L2
ECT COMPUTER
FPU
VSV (FPU) KNK KNOCK SENSOR FPR FUEL PUMP RELAY
ACV VSV (A/R CONTROL) THW WATER TEMP. SENSOR L3 ECT COMPUTER
SC 1 ISC MOTOR NO. 1 COIL
IDL
THROTTLE POSITION SENSOR
W
WARNING LIGHT
IGT IGNITER
THA AIR TEMP. SENSQR
M-REL EFI MAIN RELAY (COIL)
SC- ISC MOTOR NO. 2 COIL
VTA THROlTLE POSITION SENSOR IG SiW IGNITION SWITCH 3
ISC3 ISC MOTOR NO. 3 COIL
vs AIR FLOW METER Bl EFI MAIN RELAY
ISC4 ISC MOTOR NO. 4 COIL
vcc
AIR FLOW METER
THROTTLE POSITION SENSOR
BATT BATTERY
IGF
IGNITER
E2
SENSOR GROUND
B
EFI MAIN RELAY
G2 1 DISTRIBUTOR 1 STA 1 STARTER SWITCH
Gl 1 DISTRIBUTOR
1 NSW 1 NEUTRALSTARTSWITCH
ZU Terminals