Service manual

3-68 FUEL SYSTEM (DFI)
Fuel Injectors
If the meter doesn’t read as specified, check the following.
Main Fuse 30 A (see Fuse Inspection in the Electrical
System chapter)
Fuel Pump Relay (see Relay Circuit Inspection in the
Electrical System chapter)
Power Source Wiring (see wiring diagram below)
If the power source voltage is normal, check the output
voltage of the injectors.
Fuel Injector Output Voltage Inspection
•
Disconnect the injector connector [A] and connect the in-
sulated auxiliary leads [B] between injector [C] and injec-
tor connector.
CAUTION
Do not short each terminals.
•
Connect a digital meter [D] as shown.
Injector Output Voltage
Connections to injector (#1)
Meter (+) → BL/R lead
Meter (–) → Battery (–) Terminal
Connections to injector (#2)
Meter (+) → V lead
Meter (–) → Battery (–) Terminal
•
Turn the engine stop switch to run position.
•
Turn the ignition switch ON.
Output Voltage at Injector
Standard: Battery Voltage for 3 second, and then 0 V
•
Turn the ignition switch OFF.
If the output voltage is normal, perform “Injector Signal
Test ”.
If the output voltage is out of the s tandard, remove the
ECU (see ECU Removal/Installation), and check the in-
jector wiring for c ontinuity.
Injector Wiring Inspection
ECU Connector Injector Connectors
Terminal 43
→
Injector (#1) Terminal (BL/R)
Terminal 34
Injector (#2) Terminal (V)
If the wiring is good, inspect the resistance of the injectors
(see Injector Resistance Inspection).