Kawasaki Z400 - Service manual > Intake Air Temperature Sensor (Service Code 13) (DTC P0110, P0112)

Intake Air Temperature Sensor Removal/ Installation

NOTICE

Never drop the intake air temperature sensor especially on a hard surface. Such a shock to the sensor connector [A]

• Remove the fuel tank (see Fuel Tank Removal).
• Disconnect the intake air temperature sensor connector [A]
• Remove: Intake Air Temperature Sensor Screw [B] Intake Air Temperature Sensor [C]
• Be sure to install the O-ring [A].
• Install the intake air temperature sensor.
• Tighten:

Toque -Intake Air Temperature Sensor Screw: 1.2 N*m (0.12 kgf*m, 11 In*lb)

• Connect the intake air temperature sensor connector.
• Install the removed parts (see appropriate chapters).

Intake Air Temperature Sensor Output Voltage Inspection

NOTE

Be sure the battery is fully charged.

• Turn the ignition switch off.
• Remove the fuel tank (see Fuel Tank Removal).
• Disconnect the intake air temperature sensor connector (see Water Temperature Sensor Removal/Inspection).
• Connect the measuring adapter [A] between these connectors as shown.

Main Harness [B]

Intake Air Temperature Sensor [C]

Special Tool - Measuring Adapter: 57001-1700

• Connect a digital meter [D] to the measuring adapter leads.

Intake Air Temperature Sensor Output Voltage

Connections to Adaptec:

Digital Meter (+) → R (sensor R) lead

Digital Meter (-) → BK (sensor  BR/BK) lead

• Measure the output voltage with the engine stopped and with the connector joined.
• Turn the ignition switch on.

Output Voltage

Standard: About DC 2.25 ~ 2.50 V @ 20ºC (68ºF)

NOTE

The output voltage changes according to the intake air temperature.

• Turn the ignition switch off
• If the reading is within the standard, check the ECU for its ground and power supply (see ECU Power Supply Inspection).
• If the ground and power supply are good, replace the ECU (see ECU Removal/Installation).
• If the reading is out of the standard, remove the ECU and check the wiring for continuity between main harness connectors

Disconnect the ECU and sensor connectors.

Wiring Continuity Inspection

ECU Connector [A] ←→

Intake Air Temperature Sensor Connector [B]

ECU Terminal 26 [C] ←→ Sensor Terminal [D]

ECU Terminal 28 [E] ←→ Sensor Terminal [F]

If the wiring is good, check the intake air temperature sensor resistance (see Intake Air Temperature Sensor Resistance Inspection).

Intake Air Temperature Sensor Resistance Inspection

• Remove the intake air temperature sensor (see Intake Air Temperature Sensor Removal/Installation).
• Suspend the sensor [A] in a container of water so that the heat-sensitive portion is submerged.
• Suspend a thermometer [B] with the heat-sensitive portion [C] located in almost the same depth with the sensor

NOTE

The sensor and thermometer must not touch the container side or Mom.

• Place the container over a source of heat and gradually raise the temperature of the water while stirring the water gently for even temperature.
• Using a digital meter, measure the internal resistance of the sensor across the terminals at the temperatures shown in the following.

Intake Air Temperature Sensor Resistance

Standard: 5.4~ 6.6 k WC(32'F)

0.29~  0.39 k @80ºC (176ºF

• If the reading is out of the standard, replace the sensor (see Intake Air Temperature Sensor Removal/Installation).
• If the reading is within the standard, but the problem still exists, replace the ECU (see ECU Removal/Installation).

Intake Air Temperature Sensor Circuit

1. Intake Air Temperature Sensor
2.  ECU

See also: