DTC    42    Vehicle Speed Sensor Signal Circuit Malfunction

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DESCRIPTION

The vehicle speed sensor outputs a pulse signal according to the revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of this pulse signal.

A0094J9E06


DTC No.
DTC Detection Condition
Trouble Area
42
All conditions below are detected continuously for 8 sec. or more:
  1. Vehicle speed signal: 0 km/h (0 mph).
  2. Engine speed: 2000 to 3300 rpm.
  3. Engine coolant temperature: 70°C (158°F) or higher.
  4. Accelerator pedal opening amount: 60% or more.
  1. Open or short in vehicle speed sensor circuit
  2. Vehicle speed sensor
  3. Combination meter
  4. ECM

WIRING DIAGRAM


A0093WZE02


INSPECTION PROCEDURE

1.CHECK SPEEDOMETER (OPERATION)

  1. Drive the vehicle and check if the operation of the speedometer in the combination meter assembly is normal.

    OK:
    The speedometer operates normally according to vehicle speed.

    УКАЗАНИЕ:
    The vehicle speed sensor is operating normally if the speedometer display is normal.



NG
CHECK SPEEDOMETER CIRCUIT (Нажмите здесь)
OK


2.CHECK ECM (SP1 VOLTAGE)


    A009447E09

  1. Move the shift lever to N.

  1. Jack up the vehicle.

  1. Turn the ignition switch to ON.

  1. Check the waveform between the specified terminals of the ECM connectors as the rear wheels are turned slowly.

    OK:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G61-9 (SPD) - C101-14 (E1)
    		Ignition switch ON
    		Correct waveform is as shown

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)



NG
Перейдите к шагу 3
OK

REPLACE ECM (Нажмите здесь)  

3.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

  1. Disconnect the ECM connector.

  1. Disconnect the combination meter assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    G61-9 (SPD) - G6-32
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    G61-9 (SPD) or G6-32 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the combination meter assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Нажмите здесь)