Honda Crf250l Service Manual

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PGM-FI SYSTEM
2. Bank Angle Sensor Signal Line Short CircuitInspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) connector (page
4-50).
Check for continuity between the bank angle sensor
2P connector [1] of the wire side and ground.
Is there continuity?
YES – Short circuit in Red/blue wire
NO – GO TO STEP 3.
3. Bank Angle Sensor Signal Line Open Circuit Inspection
Turn the ignition switch OFF.
Check for continuity between the bank angle sensor
2P connector [1]...

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PGM-FI SYSTEM
MIL CIRCUIT TROUBLESHOOTING
Before starting the inspection, check the speedometer
power input line (page 20-6).
With The Ignition Switch ON, The MIL 
Does Not Come On
If the engine can be started but the MIL does not come
on when the ignition switch is turned ON and engine
stop switch  , check as follows:
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) connector (page 4-
50).
Ground the following terminal of the wire harness side
ECM 33P (Black)...

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PGM-FI SYSTEM
SENSOR UNIT
REMOVAL/INSTALLATION
Remove the left fuel tank shroud (page 2-4).
Disconnect the sensor unit 5P connector [1].
Remove the torx screws [2] and sensor unit [3] from the
throttle body.
Remove the O-ring [1].
Install a new O-ring to the throttle body properly.
If the O-ring is not installed properly, the idle air will leak
and engine idle speed will be unstable.
Install the sensor unit [2] to the throttle body by aligning
the following:
– Clip of the TP...

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PGM-FI SYSTEM
TP SENSOR RE SET PROCEDURE
If the sensor unit is removed, reset the throttle valve
fully closed position as following.
1. Erase the DTC (page 4-5).
2. Turn the ignition switch OFF.
3. Remove the dummy connector.
4. Short the DLC [1] using the special tool.
5. Disconnect the ECT sensor 3P connector [1].
Short the ECT sensor 3P connector terminals of the
wire harness side with a jumper wire [2].
6. Turn the ignition switch ON and engine stop switch  , then MIL will...

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PGM-FI SYSTEM
ECT SENSOR
REMOVAL/INSTALLATION
Drain the coolant (page 9-5).
Disconnect the ECT sensor 3P connector [1].
Remove the ECT sensor [2] and sealing washer [3].
Installation is in the reverse order of removal.
 • Replace the sealing washer with a new one.
Fill the cooling system with recommended coolant
(page 9-5).
INSPECTION
Remove the ECT sensor [1] (page 4-46).
Heat the coolant with an electric heating element.
Suspend the ECT sensor in heated coolant and check
the...

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PGM-FI SYSTEM
O2 SENSOR
 • Do not get grease, oil or other materials in the O2
sensor air hole.
 •The O2 sensor may be damaged if dropped.
Replace it with a new one, if dropped.
REMOVAL/INSTALLATION
 • Handle the O2 sensor with care.
 • Do not service the O
2 sensor while it is hot.
 • Do not use an impact wrench while removing or
installing the O
2 sensor, or it may be damaged.
Remove the left fuel tank shroud (page 2-4).
Disconnect the O
2 sensor 1P (Black) connector [1]....

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PGM-FI SYSTEM
BANK ANGLE SENSOR
REMOVAL/INSTALLATION
Remove the reserve tank cover (page 2-4).
Disconnect the bank angle sensor 2P connector [1].
Remove the bank angle sensor mounting nuts [2], bolts
[3], bank angle sensor [4] and plate [5].
Remove the collars [6] and mounting rubbers [7] from
the bracket.
Installation is in the reverse order of removal.
 • Install the bank angle sensor with its UP mark [8]facing up.
SYSTEM INSPECTION
Remove the bank angle sensor (page 4-48)....

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PGM-FI SYSTEM
ECM
ECM POWER/GROUND LINE 
INSPECTION
Before starting the inspection, check for loose or poor
contact on the ECM 33P (Black) connector and recheck
the MIL blinking.
ENGINE DOES NOT START (MIL does not blink)
1. ECM Power Input Voltage InspectionDisconnect the ECM 33P (Black) connector [1]
(page 4-50).
Turn the ignition switch ON and engine stop switch
.
Measure the voltage at the ECM 33P (Black)
connector of the wire side and ground.
Does the standard voltage...

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PGM-FI SYSTEMREMOVAL/ INSTALLATION
Remove the reserve tank cover (page 2-4).
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) connector [1].
Remove the rubber holder [2] and ECM [3].
Remove the ECM from the rubber holder.
Installation is in the reverse order of removal.[1]
[2][3] 

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5. IGNITION SYSTEM
SERVICE INFORMATION ·····························5-2
TROUBLESHOOTING···································5-2
SYSTEM LOCATION·····································5-3
SYSTEM DIAGRAM ······································5-3IGNITION SYSTEM INSPECTION ················ 5-4
IGNITION TIMING ········································· 5-6
IGNITION COIL ············································· 5-6