Toro 500 EFI Service Manual page 142


NOTE: The display on the gauge will display in SAE
(speedometer in MPH mode) or Metric (speedometer
in km/h mode), For example to read temperature 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.

NOTE: The gauge can be utilized dynamically
(engine running/vehicle moving) or statically (engine/
vehicle stopped).
Examples of Static checks: Battery voltage, fuel gauge/sen-
sor, and TPS (0% @ closed throttle, 95-100% @ WOT).
Examples of Dynamic checks: Battery charging, coolant
temperature including fans ON/OFF (see below), MAP/
IAT, tachometer, and speedometer signal.
140
EFI002A
*Fan Schedule: Fan ON @ 185 degrees F, OFF @ 175 degrees F.
*High Temperature REV Limiter 5000 RPM @ 230 degrees F.
*Thermostat opens @ approximately 180 degrees F noted by a 2-5
degree drop momentarily.
Coolant (COOL) Diagnostic Mode
Display: Engine coolant temperature as measured by the
ECT sensor.
EFI004
DTC: P0116, P0117, P0118, P0119
Usage: Monitor coolant temperature to verify the following.
1. ECT sensor signal
2. High Temperature indicator (on @ 230 degrees F).
3. Thermostat opening @ approximately 180 degrees F,
indicated by a momentary drop or pause in the rising
temperature reading.
4. Fan ON @ 185 degrees F, OFF @ 175 degrees F.
A. fan motor
B. fan relay
C. fan fuse
D. wiring connections
5. High Temperature Rev Limiter 5000 RPM @ 230
degrees F.
EFI007
EFI003
EFI 003