Suzuki Ignis Service Manual page 3347

6-146 ENGINE GENERAL INFORMATION AND DIAGNOSIS
TROUBLESHOOTING
Step
1 Was "Engine and Emission Control System
Check" performed?
2 Check vehicle speed signal.
Is vehicle speed displayed on scan tool in step
2) and 3) of DTC confirmation procedure?
3 Check power supply circuit.
1) With OFF ignition switch turned, disconnect
connector from VSS.
2) Check proper connection for "BLK/RED",
"BLK/ORN" and "YEL" wire terminal.
3) If wires are OK, turn ON ignition switch,
measure voltage between engine ground
and "BLK/RED" wire terminal.
Is it voltage 10 – 14 V?
4 Check ground circuit.
1) Measure resistance between engine body
ground and "BLK/ORN" wire terminal with
ignition switch turn OFF.
Is resistance below 5 Ω?
5 Check wire circuit.
1) Turn ON ignition switch, measure voltage
between engine ground and "YEL" wire ter-
minal at VSS connector. See Fig. 1.
Is it voltage 4 – 5 V?
6 Check ECM voltage.
1) Turn ON ignition switch, measure voltage
between vehicle body ground and "C63-19"
terminal at ECM connector.
Is it voltage 4 – 5 V?
7 Check short circuit.
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Turn ON ignition switch, measure voltage
between engine ground and "C63-19" termi-
nal.
Is it voltage 0 V?
8 Check short circuit.
1) Measure resistance between engine ground
and "C63-19" terminal with ignition switch
turned OFF.
Is resistance infinity?
Action Yes
Go to Step 2.
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
Go to Step 4.
Go to Step 5.
Go to Step 9.
"YEL" wire open circuit.
Go to Step 8.
Go to Step 9.
No
Go to "Engine and Emis-
sion Control System
Check".
Go to Step 3.
"BLK/WHT" wire open cir-
cuit.
"BLK/ORN" wire open or
high resistance circuit.
Go to Step 6.
Go to Step 7.
"YEL" wire shorted to
power supply circuit.
"YEL" wire shorted to
ground circuit.
If wire are OK, substitute a
known-good ECM and
recheck.