FI SYSTEM DIAGNOSIS 4-43
Step 2
1) Disconnect the injector couplers.
2) Turn the ignition switch ON.
3) Measure the injector voltage between Y/R wire (No.1 injector
coupler and No.2 injector coupler) and ground.
% Injector voltage: Battery voltage
(
+ Y/R –
- Ground)
NOTE:
Injector voltage can be detected only 2 seconds after ignition
switch is turned ON.
! 09900-25008: Multi circuit tester set
' Tester knob indication: Voltage (()
Is the voltage OK?
V V
2
YES
• Gr/W or Gr/B wire open or shorted to ground, or
poor
5 or
6 connection.
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
NO • Inspect the fuel pump relay. ("5-10)
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