Suzuki GRAND VITARA Owner's Manual page 217

DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions For DTC Troubleshooting: ".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Generator control circuit check
1) Disconnect connector from generator and ECM with
ignition switch turned OFF.
2) Check for proper connection of wire terminal to
generator connector and to ECM connector.
3) If connections are OK, check generator control circuit for
the following.
• Resistance of generator control circuit wire between
generator connector and ECM connector is less than
1 Ω (continuity check)
• Resistance between generator control circuit wire of
generator connector and vehicle body ground is
infinity (ground circuit short check)
• Voltage between generator control circuit wire of
generator connector and vehicle body ground is 0 V
with ignition switch tuned ON (power circuit short
check)
Are they in good condition?
3 Generator check
1) Check for generator output referring to "Generator Test
(Undercharged Battery Check): in Section 1J".
Is check result satisfactory?
4 Electric load current sensor check (for J20 engine)
1) Check for electric load current sensor output referring to
"Electric Load Current Sensor On-Vehicle Inspection
(For J20 Engine): in Section 1C".
Is check result satisfactory?
Action
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to Step 3.
For J20 engine, go to
Step 4.
For M16 engine,
Substitute a known
good ECM and recheck.
Substitute a known
good ECM and recheck.
1A-162
No
Go to "Engine and
Emission Control
System Check: ".
Repair or replace
defective wire.
Repair or replace
generator.
Replace electric load
current sensor.