Service Manual

3.20
ELECTRONIC FUEL INJECTION
Verify TPS Tester Reference Voltage
A 5 volt reference voltage signal from the TPS Tester harness is
required for the TPS test to be accurate. Refer to the instructions
provided with the TPS Tester Kit (2201519) or follow the bullet
point steps below to check reference voltage.
Reference Voltage Test:
• Insert black voltmeter probe into the “Bk” test port.
• Connect the red voltmeter probe into the “R” test port
and verify the voltage is 4.99-5.01 Vdc. If this reading
is low, verify the 9 volt battery is good or try a new 9
volt battery.
IMPORTANT: Always use a fresh 9 Volt battery.
Checking TPS Reading
1. Remove the seat and upper left-hand side panel (see
Chapter 9 “Seat and Side Panels”).
2. Assemble the TPS Tester according to the instructions.
Refer to “TPS Tester Kit” for proper set-up and testing.
Verify the 9 volt tester battery is new.
3. Disconnect vehicle harness from TPS.
4. Plug the TPS Tester harness in the TPS harness.
5. Set your voltmeter to read Vdc. Connect the red voltmeter
probe into the “R” test port and the black voltmeter probe
into the “Y” test port (see Figure 3-20).
6. Move the throttle open and closed slowly while reading the
display. The voltage should increase and decrease
smoothly without any “jumps” when the throttle is applied.
TPS Reference Voltage
5 Vdc Input
Disconnect
Should Read
.700
Black Probe
Red
Pink
Black
Red Probe
.700 ± .050 Vdc
2201519 Tester
Figure 3-20