Suzuki SWIFT RS415 2017, Service Manual

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Engine General Information and Diagnosis: 1A-133
5 Power supply circuit check
1) With ignition switch turned OFF, disconnect connector
from VSS.
2) Check for proper connection to “BLK/RED”, “PPL” and
“BLK/ORN” wire terminals of VSS connector.
3) If wires are OK, turn ON ignition switch, measure voltage
between engine ground and “BLK/RED” wire terminal of
VSS connector.
Is voltage 10 – 14 V?
Go to Step 6. “BLK/RED” wire is open
circuit.
6 Ground circuit check
1) Measure resistance between engine ground and “BLK/
ORN” wire terminal of VSS connector with ignition switch
turned OFF.
Is resistance below 5
:
?
Go to Step 7. “BLK/ORN” wire is open
or high resistance
circuit.
7 Wire circuit check
1) Turn ON ignition switch, measure voltage between
engine ground and “PPL” wire terminal of VSS
connector.
Is measured voltage 4 – 5 V?
Go to Step 11. Go to Step 8.
8 ECM voltage check
1) Turn OFF ignition switch.
2) Remove ECM form its bracket with ECM connectors
connected.
3) Turn ON ignition switch, measure voltage between
vehicle body ground and “C37-9” terminal of ECM
connector.
Is measured voltage 4 – 5 V?
“PPL” wire is open
circuit. Go to Step 9.
9 Short circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and “C37-9” terminal of ECM connector.
Is it voltage 0 V?
Go to Step 10. “PPL” wire is shorted to
power supply circuit.
10 Short circuit check
1) Measure resistance between engine ground and “C37-9”
terminal of ECM connector with ignition switch turned
OFF.
Is resistance infinity?
Go to Step 11. “PPL” wire is shorted to
ground circuit. If wire is
OK, substitute a known-
good ECM and recheck.
Step Action Yes No
I4RS0A110087-