Suzuki VZR1800 2007, Service Manual

Page: 243 / 609

5-42 FI SYSTEM DIAGNOSIS
Step 1 (When indicating P0120-H:)
1) Turn the ignition switch OFF.
2) Remove the fuel tank. (
#
6-3)
3) Check the TP sensor coupler 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 P/B wire
A
and Red wire
B
.
If the sound is not heard from the tester, the circuit condition
is OK.
6) Disconnect the ECM coupler. (
#
5-37)
7) Check the continuity between P/B wire
A
and terminal
8
.
8) Also, check the continuity between B/Br wire
C
and terminal
S
.
"
$
TPS lead wire continuity: Continuity (
(
)
!
09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
)
Tester knob indication: Continuity test (
(
)
Is the continuity OK?
9) After repairing the trouble, clear the DTC using SDS tool.
(
#
5-26)
1
1
]
When using the multi-circuit tester, do not strongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
YES Go to Step 2.
NO P/B wire shorted to VCC, or B/Br wire open
1
]
ECM coupler (Harness side)
(Black)
(Gray)