Page text (OCR transcript)
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M GE) FI-31
EFI SYSTEM CHECK PROCEDURE
HINT:
• Perform all voltage measurements with the connectors connected.
• Verify that the battery voltage is 11 V or above when the ignition switch is at ON.
Using a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal of the wiring connector.
Terminals of ECU
Symbol Terminal Name
E01 POWER GROUND
E02 POWER GROUND
No. 10 INJECTOR (No. 1 and 4)
No. 20 INJECTOR (No. 2 and 5)
STA STARTER SWITCH
No. 30 INJECTOR (No. 3 and 6)
ST1 COLD START INJECTOR
E1 COMPUTER GROUND
NSW NEUTRAL START SWITCH (A/T)
N/C CLUTCH SWITCH (M/T)
*1HT OXYGEN SENSOR HEATER
ISC1 ISC MOTOR NO. 1 COIL
ISC3 ISC MOTOR NO. 3 COIL
ISC2 ISC MOTOR NO. 2 COIL
ISC4 ISC MOTOR NO. 4 COIL
G⊖ DISTRIBUTOR
VF1 CHECK CONNECTOR
G1 DISTRIBUTOR
Symbol Terminal Name
TE1 CHECK CONNECTOR
G2 DISTRIBUTOR
VTA THROTTLE POSITION SENSOR
- DISTRIBUTOR
IDL THROTTLE POSITION SENSOR
IGT IGNITER
*1THG EGR GAS TEMP. SENSOR
IGF IGNITER
*1OX2 SUB-OXYGEN SENSOR
THW WATER TEMP. SENSOR
KNK KNOCK SENSOR
OX1 OXYGEN SENSOR
E2 SENSOR GROUND
VSV1 VSV (AIR CONTROL)
L1 TEMS (ECT) COMPUTER
L2 TEMS (ECT) COMPUTER
M.REL EFI MAIN RELAY (COIL)
Symbol Terminal Name
L3 TEMS (ECT) COMPUTER
EGR VSV (EGR)
A/C A/C MAGNETIC SWITCH
SPD SPEEDOMETER
W WARNING LIGHT
FP FUEL PUMP RELAY
DFG DEFOGGING RELAY
THA AIR TEMP. SENSOR
*1ECT ECT COMPUTER
- AIR FLOW METER
LP HEADLIGHT RELAY
VC AIR FLOW METER
*1E11 COMPUTER GROUND
BATT BATTERY
+B EFI MAIN RELAY
IG SW IGNITION SWITCH
+B1 EFI MAIN RELAY
- -
ECU Terminals
[TABLE showing ECU terminal layout with two rows of pin connections]
*1 California vehicles only
*2 A/T only
