Ariens Professional Sno-Thro Series Service Manual page 77

Inline Fuel Filter
4. Check fuel pump wiring to ensure it is connected
correctly. See Figure 181.
Fuel Pump Wires
See Figure 182.
5. Remove the fuel pump wires, turn ignition key to the
ON position and measure the fuel pump voltage.
Voltage output should measure 7.2 V DC – 8.4 V DC.
NOTICE: Disconnecting wires from fuel pump incorrectly
can cause damage to the fuel pump. To disconnect fuel
pump wires, carefully compress the center tab of the
connector and gently pull the connector away from the fuel
pump.
Figure 180
Figure 181
IMPORTANT: Fuel pump voltage MUST be measured
within 30 seconds of the ignition switch being turned to the
ON position. See Figure 183.
If voltage measures less than 7.2 V DC, check the battery
voltage by probing the green wire on the ECU 12-pin
connector. See Figure 184.
• If low voltage or no voltage is present, replace the
ECU.
• If voltage is present, inspect the green wire between
the 12-pin connector and throttle body for a pinched
or broken wire. If the wire has no damage, replace
the throttle body assembly.
• If voltage measures 7.2 V DC – 8.4 V DC, turn
ignition key to OFF position, reconnect fuel pump
wires and turn key back to ON position. Fuel pump
should make a "humming" noise.
If fuel pump is silent, the pump may have failed. Check fuel
pump:
1. Drain fuel from fuel system and tank. See Draining
Fuel System on page 7.
EN – 76
Center Tab
Figure 182
Figure 183