Kawasaki Z1000SX - Service manual > Intake Air Temperature Sensor (Service Code 13)

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 can damage it.

• Remove the fuel tank (see Fuel Tank Removal).
• Disconnect the connector [A] from the intake air temperature sensor [B].
• Remove:
  Screw [C]
  Intake Air Temperature Sensor

• Be sure to install the O-ring [A].
• Install the intake air temperature sensor.
• Tighten:
  Torque - Intake Air Temperature Sensor Mounting Screw: 1.2 N*m (0.12 kgf*m, 11 in*lb)

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 and connect the harness 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 harness adapter leads.

Intake Air Temperature Sensor Output Voltage
 Connections to Adapter:
  Digital Meter (+) → R (sensor Y) lead
  Digital Meter (-) → BK (sensor BR/BK) lead

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

Output Voltage
 Standard: About DC 2.25 - 2.50 V at 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 Inspection
 ECU Connector [A] ←→
  Intake Air Temperature Sensor Connector [B]
   Y lead (ECU terminal 15) [C]
   BR/BK lead (ECU terminal 33) [D]

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 machine oil 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 bottom.

• Place the container over a source of heat and gradually raise the temperature of the oil while stirring the oil 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 kΩ at 0ºC (32ºF)
  0.29 - 0.39 kΩ at 80ºC (176ºF)

If the reading is out of the standard, replace the sensor.

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. ECU
2. Intake Air Temperature Sensor

See also: