Self-Diagnostic Code "2 - 4" Cmp Sensor - Suzuki DF70A Service Manual

1A-26 Engine General Information and Diagnosis:
Self-Diagnostic Code "2 – 4" CMP Sensor
Wiring Diagram
Troubleshooting
Step
1 Is the CMP sensor installed properly and the wire harness
connected securely?
2 1) Disconnect the connector from the CMP sensor.
2) Check for proper connection to the CMP sensor at "B/
Bl", "Y/Bl" and "B/W" wire terminals.
3) If OK, turn the ignition switch "ON" and check the voltage
at the "B/Bl", "Y/Bl" and "B/W" wire terminals of the CMP
sensor connector.
CMP sensor voltage
Terminal "B/Bl": 10 – 14 V
Terminal "Y/Bl": 4 – 5 V
Terminal "B/W": 0 V
Is the voltage satisfactory?
3 Was terminal "Y/Bl" voltage in step 2 within specification?
4 Was terminal "B/Bl" voltage in step 2 within specification?
5 Check the CMP sensor and sensor trigger vane.
Refer to "CMP Sensor Inspection" in Section 1C (Page 1C-
11).
Is check result satisfactory?
1 2
B/Bl
1. CMP sensor
Action
For step 2
B/W
Y/ B l
ECM
C
Y/Bl
P
B/W U
I9J011110055-01
2. + 12 V (From Ign. switch)
Yes
Go to step 2.
Go to step 5.
Go to step 4.
Go to step 5.
Substitute a known-
good ECM and recheck.
B/Bl
I9J011110056-01
Z9J0111104007
No
Correct.
Go to step 3.
"Y/Bl" wire open or
shorted to ground /
power supply circuit. If
the wiring and
connection is OK,
substitute a known-
good ECM and recheck.
"B/Bl" wire open circuit.
If the wiring and
connection is OK,
substitute a known-
good ECM and recheck.
Replace CMP sensor.