120
FI672
3. Using a multimeter, connect the black tester lead to
the center socket (GND) on the analyzer and the red
tester lead to the white socket (VAR); then select the
DC Voltage position. With the vehicle off, the gauge
should read 0.48-0.52 and at Wide-Open Throttle it
should read up to approximately 3.69.
WC772
EFI Diagnostic System
DIGITAL GAUGE
The digital gauge can be used as a diagnostic tool for many of
the DTC’s displayed. To place the gauge into the diagnostic
mode, use the following procedure.
1. Turn the ignition switch ON.
2. Depress and hold both Mode and Set buttons together
for approximately 10 seconds after which the letters
“dIAg” will appear on the LCD momentarily followed
by COOL.
EFI033A
NOTE: The display on the gauge will display in
SAE (speedometer in MPH mode) or Metric (speed-
ometer in km/h mode), For example to read tem-
perature in degrees Celsius, select km/h mode on
the gauge or to read Fahrenheit, select MPH mode.
3. Cycle the display by depressing either the Set or
Mode button to step to the desired function.
EFI025A
NOTE: The gauge can be utilized dynamically
(engine running/vehicle moving) or statically
(engine/vehicle stopped).
Examples of Static checks: Battery voltage, fuel gauge/
sensor, and TPS (0% @ closed throttle, 95-100% @
WOT).
EFI028
Examples of Dynamic checks: Battery charging, coolant
temperature including fans ON/OFF (see below), MAP/
IAT, tachometer, and speedometer signal.
