Suzuki DF70A - Self-Diagnostic Code 3 - 4 MAP Sensor

1A-22 Engine General Information and Diagnosis:
Self-Diagnostic Code “3 – 4” MAP Sensor
Z9J0111104003
Wiring Diagram
Troubleshooting
For step 1
ECM
W
B/W
R
5V
5V
C
P
U
B
1
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1. MAP sensor
Step Action Yes No
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?
Go to step 2. • “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.
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?
• Substitute a 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.
I9J011110043-02
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