Dtc B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK SPEEDOMETER OPERATION

READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - INSTRUMENT PANEL JUNCTION BLOCK)

INSPECT COMBINATION METER

DESCRIPTION

HINT:

When the main body ECU (instrument panel junction block) is replaced with a new one and the cable from the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system (COROLLA_ZRE142 RM000000QYF05AX.html).

WIRING DIAGRAM

HINT:

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
   
2. If a short occurs in an ECU, all systems in the diagram above will not operate normally.
   

INSPECTION PROCEDURE

1. Check for CAN communication system DTCs (COROLLA_ZRE142 RM000000WI60ACX.html).
   

   HINT:

   If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.

   Result:

   Result	Proceed to
   CAN communication DTC is not output	A
   CAN communication DTC is output	B

1. Connect the Techstream to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Enter the following menus: Body Electrical / Combination Meter / Data List.
   

4. Check the values by referring to the values in the table below.
   
   

   Combination Meter

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed Meter	Vehicle speed/Min.: 0 km/h (0mph), Max.: 255 km/h (158 mph)	Almost same as actual speed (When driving)	-

   OK:

   Vehicle speed displayed on the Techstream is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).
   

1. Connect the Techstream to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Read the Data List according to the displays on the Techstream.
   
   

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed Signal	Vehicle speed signal / STOP or RUN	STOP: Vehicle is stopped Run: Vehicle is running	-

OK:

"STOP" (Vehicle is stopped) and "OFF" (Vehicle is running) appear on the screen.

4. Proceed to the next step based on the inspection result.
   

   Result:

   Result	Proceed to
   OK	A
   NG	B

1. Disconnect the E46 meter connector.
   

   
   
   
   

2. Disconnect the 2E connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   2E-1 (SPD) - E46-36 (+S)	Always	Below 1 Ω
   2E-1 (SPD) or E46-36 (+S) - Body ground	Always	10 kΩ or higher

1. Check the output waveform.
   

   1. Remove the combination meter with the connector(s) still connected (COROLLA_ZRE142 RM0000024D7032X.html).
      

   2. Connect the oscilloscope to terminals E46-36 (+S) and body ground.
      

   3. Turn the engine switch on (IG).
      

   4. Turn the wheel slowly.
      

   5. Check the signal waveform according to the condition(s) in the table below.
      

      Item	Condition
      Tool setting	5 V/DIV., 20 ms./DIV
      Vehicle condition	Driving at approx. 20 km/h

      OK:

      The waveform is displayed as shown in the illustration.
      

      HINT:

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.