IAT Sensor Output Voltage Inspection

Turn the ignition switch OFF.

Connect the ECM 33P (Black) connector. Disconnect the sensor unit 5P connector [1] (page 4-44).

Turn the ignition switch ON and engine stop switch " ".

Measure the voltage at the sensor unit 5P connector of the wire side.

Connection: Gray/blue (+) – Green/white (–) Standard: 4.75 – 5.25 V

 

Is the voltage within 4.75 – 5.25 V?

 

YES	–GO TO STEP 5.
NO	–GO TO STEP 3.

 

IAT Sensor Output Line Short Circuit Inspection

Turn the ignition switch OFF.

Disconnect the ECM 33P (Black) connector.

Check for continuity between the sensor unit 5P connector [1] of the wire side and ground.

Connection: Gray/blue – Ground

 

Is there continuity?

 

YES – Short circuit in Gray/blue wire

 

NO – GO TO STEP 4.

 

 

IAT Sensor Output Line Open Circuit Inspection

Check for continuity between the ECM 33P (Black) connector [1] and sensor unit 5P connector [2] of the wire side.

Connection: Gray/blue – Gray/blue

 

TOOL:
Test probe	07ZAJ-RDJA110
Is there continuity?
YES	–Replace the ECM with a known good one
	and recheck.
NO	–Open circuit in Gray/blue wire

 

 

[1]

 

 

Gr/Bu G/W

 

 

[1]

 

 

Gr/Bu

 

Gr/Bu

 

Gr/Bu

 

[2]

[1]

 

4-34

PGM-FI SYSTEM

IAT Sensor Resistance Inspection

Turn the ignition switch OFF.

Connect the sensor unit 5P connector. Disconnect the ECM 33P (Black) connector [1].

Measure the resistance at the ECM 33P (Black) connector of the wire side.

 

Connection: Gray/blue – Green/white			G/W	Gr/Bu
Standard: 1.13 – 1.88 kΩ (20°C/68°F)
Is the resistance within 1.13 – 1.88	kΩ (20°C/
68°F)?
YES	–Replace the ECM with a known good one,
	and recheck.
NO	–Faulty sensor unit (IAT sensor)		[1]

 

MIL 11 BLINKS (VS SENSOR)

Before starting the inspection, check for loose or poor contact on the VS sensor 3P (Blue) connector and recheck the MIL blinking.

 

ECM

To SPEEDOMETER

 

 

VS SENSOR

 

G G/Bl

 

Bl Bl/R

 

	W/R		W/R
P

 

 

Probable cause

• Open or short circuit in Pink or White/red wire between the VS sensor and ECM

 

• Faulty VS sensor

• Faulty ECM

 

Speedometer Inspection

 

Inspect the speedometer (page 20-8).

 

Is the speedometer normal?

 

YES – GO TO STEP 2.

 

NO – Replace or repair the abnormal circuit.

 

4-35

PGM-FI SYSTEM

VS Sensor Signal Line Inspection

 

Turn the ignition switch OFF.
		[1]
Disconnect the ECM 33P (Black) connector [1].
Turn the ignition switch ON and engine stop switch
" ".
Measure the voltage at the ECM 33P (Black)
connector of the wire side.
Connection: White/red (+) – Ground (–)
TOOL:				W/R
Test probe	07ZAJ-RDJA110

Slowly turn the rear wheel by hand. There should be 0 V to 5 V pulse voltage.

 

Is there 0 – 5 V pulse voltage?

 

YES – Replace the ECM with a known good oneand recheck.

 

NO – Open or short circuit in White/red wire.

 

MIL 12 BLINKS (INJECTOR)

Before starting the inspection, check for loose or poor contact on the injector 2P (Gray) connector and recheck the MIL blinking.

 

ECM

From ENGINE

 

STOP SWITCH

 

 

INJECTOR _Bl/Bu

 

 

P/W

 

 

Probable cause

• Open circuit in Black/blue wire between the engine stop switch and injector

• Open or short circuit in Pink/white wire between the injector and ECM

 

• Faulty injector

• Faulty ECM

 

4-36

PGM-FI SYSTEM

 

Injector Input Voltage Inspection

Turn the ignition switch OFF.

Disconnect the injector 2P (Gray) connector [1] (page 7-14).

Turn the ignition switch ON and engine stop switch " ".

Measure the voltage between the injector 2P (Gray) connector of the wire side and ground.

Connection: Black/blue (+) – Ground (–) Standard: Battery voltage

 

Does the standard voltage exist?

 

YES – GO TO STEP 2.

 

NO – Open circuit in Black/blue wire

 

Injector Signal Line Short Circuit Inspection

Turn the ignition switch OFF.

Disconnect the ECM 33P (Black) connector.

Check for continuity between the injector 2P (Gray) connector [1] of the wire side and ground.

Connection: Pink/white – Ground

 

Is there continuity?

 

YES – Short circuit in Pink/white wire

 

NO – GO TO STEP 3.

 

 

Injector Resistance Inspection

Measure the resistance between the injector side connector [1] terminals.

Standard: 11 – 13 Ω (20°C/68°F)

 

Is the resistance within 11 – 13 Ω (20°C/68°F)?

 

YES – GO TO STEP 4.

 

NO – Faulty injector

 

Injector Signal Line Open Circuit Inspection

Check for continuity between the ECM 33P (Black) connector [1] and injector 2P (Gray) connector [2] of the wire side.

Connection: Pink/white – Pink/white

 

TOOL:
Test probe	07ZAJ-RDJA110
Is there continuity?
YES	–Replace the ECM with a known good one,
	and recheck.
NO	–Open circuit in Pink/white wire

 

[1]

 

 

Bl/Bu

 

 

[1]

 

P/W

 

 

[1]

 

[2]

[1]

 

 

P/W

 

P/W

 

4-37

PGM-FI SYSTEM

MIL 21 BLINKS (O2 SENSOR)

Before starting the inspection, check for loose or poor contact on the O2 sensor 1P (Black) connector or O2 sensor cap and recheck the MIL blinking.

 

ECM

 

O2 SENSOR

 

Bl Bl/W

 

 

Probable cause

• Open or short circuit in Black/white or Black wire between the O2 sensor and ECM

 

• Faulty O2 sensor

• Faulty ECM

 

O2 Sensor System Inspection

Start the engine and warm up the engine up to coolant temperature is 80°C/176°F.

Test-ride the motorcycle and recheck the MIL blinking.