ECM. Honda CBR125R

ECM

FUEL SYSTEM (PGM-FI)

INSPECTION WITH ECM TEST

HARNESS

Connect the ECM test harness (page 5-11).

Remove the bank angle sensor (page 5-63).

Connect the bank angle sensor 3P connector.

Place the bank angle sensor horizontal as shown.

Turn the ignition switch ON (and engine stop switch

" ": CM and U type).

Measure the output voltage with the ECM test harness at its terminals.

Connection: 26 (+) – 4 (–)

Standard: 3.6 – 4.4 V

Incline the bank angle sensor approximately 60 ° to the left or right with keeping the ignition switch ON

(and engine stop switch " ": CM and U type).

Measure the output voltage with ECM test harness at its terminals.

Connection: 26 (+) – 4 (–)

Standard: 0.7 – 1.3 V

• If you repeat this test, first turn the ignition switch OFF, then turn the ignition switch ON (and engine stop switch " ": CM and U type).

(4)

(26)

60 ° BANK ANGLE POSITION

(approximately) 60 °

HORIZONTAL

60

°

(approximately)

REMOVAL/ INSTALLATION

Lift and support the fuel tank (page 3-6).

Open the rubber sheet (page 6-10).

Turn the ignition switch OFF.

Disconnect the ECM 33P connector.

Remove the rubber holder and ECM.

Remove the ECM from the rubber holder.

Install the ECM to the rubber holder install them to the frame.

Connect the ECM 33P connector.

Close the rubber sheet (page 6-15).

Remove the suitable support and close the fuel tank

(page 3-6).

ECM

RUBBER HOLDER

ECM 33P CONNECTOR

5-65

FUEL SYSTEM (PGM-FI)

ECM POWER/GROUND LINE

INSPECTION

ENGINE DOES NOT START (No DTC and MIL blinking)

1. ECM Power Input Voltage Inspection

• Before starting the inspection, check for loose or poor contact on the ECM 33P connector and recheck the MIL blinking.

Lift and support the fuel tank (page 3-6).

Open the rubber sheet (page 6-10).

Disconnect the ECM 33P connector.

ECM 33P CONNECTOR

Turn the ignition switch ON (and engine stop switch " ": CM and U type).

Measure the voltage at the ECM 33P connector of the wire side and ground.

TOOL:

Test probe 07ZAJ-RDJA110

ECM 33P CONNECTOR

(Wire side/female terminal)

(1)

Connection: 1 (Black/white) (+) – Ground (–)

Standard: Battery voltage

Does the standard voltage exist?

YES –

GO TO STEP 2.

NO – • Open or short circuit in Black/white wire

• Faulty ignition switch

• Blown main or sub fuse

• Faulty engine stop switch (CM and U type)

2. ECM Ground Line Inspection

Turn the ignition switch OFF.

Check the continuities between the ECM 33P connector of the wire side and ground.

TOOL:

Test probe 07ZAJ-RDJA110

ECM 33P CONNECTOR

(Wire side/female terminals)

(10)

Connection: 2 (Green/black) – Ground

9 (Green) – Ground

10 (Green) – Ground

Is there continuity?

YES – Replace the ECM with a known good one, and recheck.

NO – • Open circuit in Green/black wire

• Open circuit in Green wires

(9) (2)

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