Service Manual

4.27
ELECTRONIC FUEL INJECTION
4
Verify TPS Tester Reference Voltage
A 5 volt reference voltage from the harness is required for the
TPS test to be accurate. Refer to the instructions provided with
the TPS Test Adapter Harness (PU-47082) or follow the bullet
point steps to check reference voltage.
• Harness Test: Insert black voltmeter probe into the
“Bk” test port.
• Connect the red meter probe into the “R” 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.
Test Procedure
1. Disconnect the vehicle harness from the TPS.
NOTE: To allow better access to the TPS harness
connection, remove the exhaust pipe and exhaust
silencer.
2. Plug the TPS tester harness in the TPS harness.
3. Connect the red volt meter test probe in yellow test port
and black volt meter test probe in the black test port and set
the meter to read VDC.
4. Move the throttle open and closed slowly while reading the
display. The voltage should increase and decrease
smoothly with no “jumps” when the throttle is applied.
5. If voltage varies with throttle movement, continue on to the
next step and measure the idle air flow reading. If the sensor
did not function correctly, replace it.
6. With voltmeter still attached to the TPS Test Adapter
Harness (PU-47082) as shown below, the voltmeter should
read .735 ± .01 volts at idle position.
7. If the voltage does not read within the specification,
“TPS Initialization” will need to be performed.
No “Jumps”
.70 ~ 3.7
Black
Red
Pink
Black
Probe
Red
Probe
in read out
PU-47082 Tester
Should Read
.735
Black
Red
Pink
Black
Probe
Red
Probe
.735 Vdc
PU-47082 Tester