FI SYSTEM DIAGNOSIS 4-39
4) Disconnect the TP sensor coupler.
5) Turn the ignition switch ON.
6) Measure the voltage at the O/Bl wire

B and ground.
7) If OK, then measure the voltage at the O/Bl wire

B and B
wire

C.
$ TP sensor input voltage: 4.5 – 5.5 V
(

+ O/Bl –

- Ground)
(

+ O/Bl –

- B)
! 09900-25008: Multi-circuit tester set
& Tester knob indication: Voltage (')
Is the voltage OK?
Step 1 (When indicating P0120-H:)
1) Turn the ignition switch OFF.
2) Remove the front frame cover. (#8-8)
3) Check the TP sensor coupler

1 for loose or poor contacts.
If OK, then check the TP sensor lead wire continuity.
4) Disconnect the TP sensor coupler.
5) Check the continuity between Br wire

A and O/Bl wire

B.
If the sound is not heard from the tester, the circuit condition
is OK.
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(terminal

9 or

J).
• Open or short circuit in the O/Bl wire or B wire.
1
V
1
1
]
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