Suzuki Liana RH418, Supplementary Service Manual

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1A-67 Engine General Information and Diagnosis:
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Is vehicle equipped A/T? Go to Step 10. Go to Step 3.
3 Does speedometer indicate vehicle speed? Go to Step 4. Go to Step 6.
4 Check vehicle speed signal
Is vehicle speed displayed on scan tool in Step 2) and 3) of
“DTC Confirmation Procedure”?
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”. Go to Step 5.
5 Check VSS signal circuit
1) With turn OFF ignition switch, disconnect connector from
VSS.
2) Disconnect combination meter connectors.
3) Turn ON ignition switch, without running engine.
4) Measure voltage from terminal “a” of VSS connector to
ground.
Is voltage within 4 – 5 V?
Faulty speedometer. “PPL” wire open or
short.
Poor connection of ECM
connector terminal.
If OK, substitute a
known-good ECM and
recheck.
6 Check VSS power supply
1) With turn OFF ignition switch, disconnect connector from
VSS.
2) Turn ON ignition switch, without running engine.
3) Measure voltage from “b” to “c” of VSS connector.
Is voltage within 10 – 14 V?
Go to Step 7. “BLK/RED” or “BLK/
ORN” wire open or
short.
I2RH01110120-01
I2RH0B110065-01