C21" (P0110-H/L) Iat Sensor Circuit Malfunction - Suzuki GSX-R1000K5 Service Manual

Table of Contents

4-52 FI SYSTEM DIAGNOSIS

"C21" (P0110-H/L) IAT SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION

Output voltage is not within the following

Sensor voltage is higher than specified

Sensor voltage is lower than specified

Step 1 (When indicating C21:)

1) Turn the ignition switch OFF.

2) Lift and support the fuel tank. (5-3)

3) Check the IAT sensor coupler for loose or poor contacts.

If OK, then measure the IAT sensor voltage at the wire side

4) Disconnect the coupler and turn the ignition switch ON.

5) Measure the voltage between Dg wire terminal A and

6) If OK, then measure the voltage between Dg wire terminal A

and B/Br wire terminal B.

 IAT sensor input voltage: 4.5 – 5.5 V

 09900-25008: Multi-circuit tester set

 Tester knob indication: Voltage ()

Is the voltage OK?

Go to Step 2.

• Loose or poor contacts on the ECM coupler

(terminal Q or S)

• Open or short circuit in the Dg wire or B/Br wire

Sensor voltage < 4.85 V

(+ Dg – - Ground)

(+ Dg – - B/Br)

POSSIBLE CAUSE

• IAT sensor circuit open or short

• IAT sensor malfunction

• ECM malfunction

• IAT sensor circuit open or ground circuit open

• IAT sensor circuit shorted to ground

Table of Contents