Self-Diagnostic Code "3 - 4" Map Sensor - Suzuki DF70A Service Manual

1A-22 Engine General Information and Diagnosis:
Self-Diagnostic Code "3 – 4" MAP Sensor
Wiring Diagram
1
Troubleshooting
Step
1 1) With the ignition switch "OFF", disconnect the MAP
sensor connector.
2) With the ignition switch "ON", Check the voltage at the
"R" wire terminal of the MAP sensor connector.
Is the voltage approx. 4 – 5 V?
2 1) Check the MAP sensor output voltage change.
Refer to "MAP Sensor Output Voltage Inspection" in
Section 1C (Page 1C-13).
Is it in good condition?
W
B/W
R
1. MAP sensor
Action
For step 1
ECM
B
Yes
Go to step 2.
• Substitute a good
ECM and recheck.
I9J011110043-02
Z9J0111104003
5V
C
P
U
5V
I9J011110019-02
No
• "R" wire open, "R"
wire shorted to
ground or a poor wire
connection.
• If the wiring and
connection is OK,
substitute a known-
good ECM and
recheck.
• Faulty MAP sensor.
• "R" wire shorted to
"W" wire, "B/W" wire
open, poor "B/W"
wire connection, poor
"W" wire connection,
"W" wire open or poor
MAP sensor
connection.
• If the wiring and
connection is OK,
intermittent trouble or
a faulty ECM may be
the cause.