17-106 SELF-DIAGNOSIS SYSTEM
Secondary Fuel Injectors (Service Code 4A, 4B, 4C, 4D)
If the reading is out of the specification, remove the ECU
and check the wiring for continuity between main harness
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→ Secondary Fuel Injector
For Secondary Fuel Injector #1 [C]
O/R lead (ECU terminal 14) [D]
For Secondary Fuel Injector #2
O/G lead (ECU terminal 1)
For Secondary Fuel Injector #3
O/BK lead (ECU terminal 3)
For Secondary Fuel Injector #4
O/Y lead (ECU terminal 5)
If the wiring is good, check the ECU for its ground and
power supply (see ECU Power Supply Inspection in the
Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU
(see ECU Removal/Installation in the Fuel System (DFI)
Secondary Fuel Injector Fuel Line Inspection
Refer to the Primary Fuel Injector Fuel Line Inspection.