Suzuki RA410, Manual

Page: 389 / 761

6E1-24 ENGINE AND EMISSION CONTROL SYSTEM
DTC NO. 16 VEHICLE SPEED SENSOR CIRCUIT
(NO VEHICLE SPEED SENSOR SIGNAL EVEN THOUGH FUEL HAS BEEN CUT FOR
MORE THAN 4 SECONDS)
WIRING DIAGRAM
1. VSS sensing rotor
2. VSS (vehicle speed sensor)
3. VSS connector
4. Power supply from main relay
5. Speedometer, P/S control
module
6. ECM/PCM connector
7. ECM/PCM
A18
B/R
V
B/Or
TROUBLESHOOTING
CAUTION:
Do not connect from terminal “a” to “b” of VSS sensor connector.
STEP ACTION YES NO
1 Did you perform ENGINE DIAGNOSIS FLOW
TABLE in SECTION 6?
Go to Step 2. Go to ENGINE DIAGNO-
SIS FLOW TABLE in
SECTION 6.
2 Does speedometer indicate vehicle speed? “V” wire open or short.
Poor connection of
ECM/PCM connector
terminal.
If OK, substitute a
known-good ECM/PCM
and recheck.
Go to Step 3.
3 1) With ignition switch at OFF position, disconnect
VSS connector.
2) Turn ignition switch to ON position, without run-
ning engine.
3) Measure voltage from terminal “a” to “b” of
VSS connector.
Is voltage within 10 – 14V?
Go to Step 4. “B/R” or “B/Or” wire open
or short.
4 1) Measure voltage from terminal “c” of VSS con-
nector to ground.
Is voltage more than 4V?
Go to Step 5. Go to Step 6.