Self-Diagnostic Code "1 - 1" Rectifier; Regulator (Over Charging); Self-Diagnostic Code "5 - 3" Oil Pressure; Switch - Suzuki DF70A Service Manual

Self-Diagnostic Code "1 – 1" Rectifier/Regulator (Over Charging)
NOTE
• This self-diagnostic code indication may be canceled when turning the ignition switch "ON" (engine
not running), because ECM detects battery voltage.
• It is difficult to thoroughly check the rectifier/regulator. Before replacing it with new one, check that
the ground point has good electrical contact.
Troubleshooting
Step
1 1) Check the Rectifier/Regulator resistance.
Refer to "Rectifier/Regulator Inspection" in Section 1K
(Page 1K-8).
Is the result OK?
2 1) With the engine running, check charging voltage at idle
speed.
Is the result 16 V or higher?
Self-Diagnostic Code "5 – 3" Oil Pressure Switch
Wiring Diagram
Troubleshooting
Step
1 1) With the ignition switch "OFF", remove the oil pressure
switch wire.
2) With the ignition switch "ON", check the voltage between
the oil pressure switch wire terminal and body ground.
Is the voltage approx. 5 V?
2 1) Check the oil pressure switch operation.
Refer to "Oil Pressure Switch Inspection" in Section 1E
(Page 1E-6).
Is it in good condition?
Action
1
Bl
1. Oil pressure switch
Action
For step 1
Engine General Information and Diagnosis:
Yes
Go to step 2.
Faulty Rectifier/
Regulator.
ECM
C
P
U
I9J011110063-01
Yes
Go to step 2.
Poor oil pressure switch
wire connection,
intermittent trouble or a
faulty ECM may be the
cause.
I9J011110064-01
1A-35
Z9J0111104015
No
Faulty Rectifier/
Regulator.
Faulty ECM or wire
continuity / connection
failure.
Z9J0111104016
No
• Oil pressure switch
wire open or poor
connection.
• If wire and
connection are OK,
substitute a known-
good ECM and
recheck.
Faulty oil pressure

switch.