Fan Motor; Power Distribution Module (Pdm); Ignition Coil - Toro 500 EFI Service Manual

4. Install the sensor and tighten securely; then connect
the leads.

Fan Motor

This component can be tested using the CATT II. Utilize
the Test screen.

NOTE: Preliminary checks may be performed on
this component using the diagnostic mode on the
LCD gauge (see EFI Diagnostic System in this sec-
tion).

NOTE: To determine if the fan motor is good, con-
nect the red wire from the fan connector to the posi-
tive side of a 12 volt battery; then connect the black
wire from the fan connector to the negative side. The
fan should operate.
! WARNING
Care should be taken to keep clear of the fan blades.

NOTE: Fan motor resistance checks are not recom-
mended. Resistance values change with the motor
commutator position.
Power Distribution
Module (PDM)

NOTE: The module and wiring harness are not a
serviceable component and must be replaced as an
assembly.
If there is any type of electrical system failure, always
check the fuses first.

NOTE: The fuses are located in a power distribution
module under the operator's seat.
1. Remove all fuses from the power distribution mod-
ule.

NOTE: To remove a fuse, compress the locking tabs
on either side of the fuse case and lift out.
128
CAUTION
Always replace a blown fuse with a fuse of the same
type and rating.

NOTE: Make sure the fuses are returned to their
proper position according to amperage. Refer to the
amperage listed under each fuse on the power distri-
bution module.
2. Set the meter selector to the DC Voltage position.
3. Connect the black tester lead to battery ground.
4. Using the red tester lead, contact each end of the fuse
holder connector terminals individually.
5. The meter must show battery voltage from one side
of the connector terminal ends.

NOTE: Battery voltage will be indicated from only
one side of the fuse holder connector terminal; the
other side will show no voltage.

NOTE: When testing the HI fuse holder, the head-
light OFF/HI/LO switch must be in the HI position;
when testing the LIGHTS fuse holder, the headlight
dimmer switch can be in either the HI or the LO posi-
tion.

NOTE: If the meter shows no battery voltage, trou-
bleshoot the battery, switches, power distribution
module, or the main wiring harness.
RELAYS
The 4-pin relays are identical plug-in type located on the
power distribution module. Relay function can be
checked by switching relay positions. The 4-pin relays
are interchangeable.

Ignition Coil

The ignition coil is mounted on the fuel pump mounting
plate adjacent to the fuel pump.
VOLTAGE (Primary Side)
See Primary Coil in this sub-section.
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