Injector Output Voltage Connections to Injector #1

Meter (+) → BL/R lead (terminal 42) Meter (–) → Battery (–) Terminal

Connections to Injector #2

Meter (+) → BL/G lead (terminal 41) Meter (–) → Battery (–) Terminal

_• Turn the ignition switch ON.

Output Voltage at Injector Connector

Standard: Battery Voltage (12.8 V or more)

If the output voltage is normal, perform “Injector Signal Test”.

If the output voltage is out of the standard, turn the ignition switch OFF, remove the fuel tank, and check the injector wiring for continuity.

Injector Wiring Inspection

ECU Connector Injector Connectors Terminal 42 → Injector #1 Terminal (BL/R) Terminal 41 → Injector #2 Terminal (BL/G)

If the wiring is good, inspect the resistance of the injectors (see Injector Resistance Inspection).

_• Remove the needle adapter.

_• Apply silicone sealant to the seals of the ECU connector

for waterproofing.

Sealant - Kawasaki Bond (Silicone Sealant): 56019-120

Injector Signal Test

_• Prepare two test light sets with male terminals as shown. Rating of Bulb [A]: 12 V × 3  3.4 W

Terminal Width [B]: 1.8 mm (0.071 in.) Terminal Thickness [C]: 0.8 mm (0.031 in.)

_• Remove the fuel tank (see Fuel Tank Removal).

_• Remove the air cleaner housing (see Air Cleaner Housing

Removal)

_• Remove connectors for injector [A].

_• Connect each test light set [B] to the injector sub harness

connector [C].

_• Turn the ignition switch ON.

_• While cranking the engine with the starter motor, watch

the test lights.

If the test lights flicker at regular intervals, the injector circuit in the ECU, and the wiring are good. Perform the “Injector Resistance Inspection”.

○^{Injector signals can be also confirmed by connecting the} hand tester (× 10 V AC) instead of the test light set to the injector main harness (female) connector. Crank the engine with the starter motor, and check to see if the hand oscillates at regular intervals.

Special Tool - Hand Tester: 57001-1394

If the test light doesn’t flicker (or the tester needle doesn’t oscillates), check the wiring and connectors again. If the wiring is good, check the injector voltage. If the wiring is good, inspect the ECU for its ground and power supply (see ECU Power Supply Inspection).

Injector Resistance Inspection

_• Remove the fuel tank (see Fuel Tank Removal).

_• Remove the air cleaner housing (see Air Cleaner Housing

Removal).

_• Disconnect the connector from the injector [A].

_• Measure the injector resistance with the hand tester [B].

Special Tool - Hand Tester: 57001-1394

Injector Resistance Connections to Injector

Meter (+) Meter (–)

#1: W/r ←→ bl/r Terminal #2: w/r ←→ bl/g Terminal

Standard: About 11.7  12.3 Ω at 20°C (68°F)

If the reading is out of the range, perform the “Injector Unit Test”.

If the reading is normal, perform the “Injector Unit Test” for confirmation.

Injector Unit Test

_• Use two leads [A] and the same test light set [B] as in “Injector Signal Test”.

Rating of Bulb [C]: 12 V × (3  3.4) W 12 V Battery [D]

_• Connect the test light set to the injector [E] as shown.

_• Open and connect [F] the end of the lead to the battery

(–) terminal repeatedly. The injector should click.

If the injector does not click, replace the injector.

If the injector clicks, check the wiring again. If the wiring is good, replace the injector (may be clogged) or ECU.