Suzuki Swift User Manual page 244

6-1-88 ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13)
INSPECTION
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Does speedometer indicate vehicle speed?
3 Check VSS and Its Circuit.
1) Disconnect ECM connector with ignition switch OFF.
2) Check for proper connection to ECM (PCM) at terminal
C03-2.
3) If OK, then connect ohmmeter between terminal
C03-2 of ECM (PCM) connector and body ground.
4) Hoist front end of vehicle and lock front right tire.
5) Turn front left tire slowly.
Does ohmmeter indicator deflect between 0 and infinity a
few times while tire is turned one revolution?
See Fig. 1.
4 Check VSS.
1) Remove combination meter.
2) Connect ohmmeter between "VSS" terminal and "GND"
terminal of combination meter and turn cable joint of
speedometer with a screwdriver. Ohmmeter indicator
should move back and forth between 0 and infinity
4 times while cable joint is turned one full revolution.
See Fig. 2.
Is it in good condition?
Fig. 1 for Step 3
ACTION YES
Go to Step 2.
Go to Step 3.
Intermittent trouble
or faulty ECM.
Check for
intermittent
referring to
"Intermittent and
Poor Connection"
in section 0A.
"P", "Y/G" or "B/Bl"
wire open or short,
or poor connection.
Fig. 2 for Step 4
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Speedometer
cable disconnected
or broken.
Go to Step 4.
Replace VSS.