Suzuki VZR1800 2007, Service Manual

Page: 286 / 609

FI SYSTEM DIAGNOSIS 5-85
Step 1 (When indicating P1657-L:)
1) Turn the ignition switch OFF.
2) Remove the lower frame cover. (
#
7-8)
3) Check the EXCVA position sensor coupler for loose or poor
contacts.
If OK, then check the EXCVA position sensor lead wire conti-
nuity.
4) Disconnect the EXCVA position sensor coupler.
5) Check the continuity between Yellow wire
A
and ground.
6) Also, check the continuity between Yellow wire
A
and B/Br
wire
B
. If the sound is not heard from the tester, the circuit
condition is OK.
7) Disconnect the ECM coupler. (
#
5-37)
8) Check the continuity between Yellow wire
A
and terminal
5
.
9) Also, check the continuity between Red wire
C
and terminal
A
.
"
$
EXCVA 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?
10)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 and Go to Step 4.
NO
Red or Yellow wire open, or Yellow wire shorted to
ground
1
]
ECM coupler (Harness side)
(Black)
(Gray)