20
Hookup
Active Fuel Injector Tester User Guide
Direct Injector and Fuel Pump Connection
Note: This connection requires the use of additional accessories not included with the kit.
This connection directly controls the injectors and the fuel pump from the MCU. Use this
connection for vehicles not listed in the AFIT database (older GM and other manufacturer’s
vehicles without a Data Link Connector).
Procedure
Note: To correctly match test results to the injector, use the injector locater when using this hookup.
1. Connect the Fuel Schrader Connector to the vehicle’s fuel rail at the fuel test port.
2. After purging the fuel rail and when instructed by AFIT, connect the FPEA cable to the fuel
pump relay socket. IMPORTANT! Do not perform this step until instructed to (AFIT will prompt
for the cable).
3. Connect the injector harness to the MCU and the vehicles injectors. IMPORTANT! Do not
perform this step until instructed to (AFIT will prompt for the correct injector harness).
4. Insert the drain hose into an approved fuel storage container.
POWER
Fuel Management Unit
ENTER
CANCEL
DOWN
ON / OFF
UP
To approved fuel
storage container
To vehicle’s fuel
pump relay
socket
Vehicle’s fuel rail
Fuel test
port
IMPORTANT
Do not connect the
injector harness to
injectors and the
FPEA Cable to the fuel
pump until instructed
by AFIT.
IMPORTANT
Hang the FMU vertically
from vehicle’s hood
To vehicle’s battery
Interconnect
Cable
FMU
FPEA Cable
MCU
