Suzuki GRAND VITARA Owner's Manual page 219

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
(generator "C" terminal) circuit and field coil monitor
(generator "FR" terminal) circuit for the following.
• Resistance of each generator control wire and field
coil monitor wire between generator connector and
ECM connector is less than 1 Ω (continuity check)
• Resistance between generator control wire and field
coil monitor wire of generator connector is infinity
(insulation check)
• Resistance between each generator control wire and
field coil monitor wire of generator connector and
vehicle body ground is infinity (ground circuit short
check)
• Voltage between each generator control wire and field
coil monitor 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" and
"Generator Inspection: in Section 1J".
Is check result satisfactory?
Action
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to Step 3.
Substitute a known
good ECM and recheck.
1A-164
No
Go to "Engine and
Emission Control
System Check: ".
Repair or replace
defective wire.
Repair or replace
generator.