Dtc B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK SPEEDOMETER OPERATION

READ VALUE USING INTELLIGENT TESTER

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COMBINATION METER ASSEMBLY)

INSPECT COMBINATION METER ASSEMBLY (SPEED SIGNAL)

CHECK HARNESS AND CONNECTOR (JUNCTION BLOCK - MAIN BODY ECU)

CHECK HARNESS AND CONNECTOR (JUNCTION BLOCK - COMBINATION METER ASSEMBLY)

DESCRIPTION

HINT:

When the main body ECU is replaced with a new one and 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 is replaced, perform the registration procedures for the engine immobiliser system.

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 if CAN communication DTCs are output (for LHD: CAMRY_ACV40 RM000000WI605LX.html) (for RHD: CAMRY_ACV40 RM000000WI605KX.html).
   

   HINT:

   If any DTCs for 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 (for LHD).	B
   CAN communication DTC is output (for RHD).	C

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the intelligent tester on.
   

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

5. Read the Data List according to the display on the intelligent tester.
   
   

   Combination Meter

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

1. Enter the following menus: Body / Body / Data List.
   

2. Read the Data List according to the display on the intelligent tester.
   
   

   Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle speed signal	Vehicle speed signal/Stop or Run	Stop: Vehicle stopped Run: Vehicle running	-

   OK:

   Stop (vehicle is sopped) and Run (vehicle is running) appear on the screen.
   

1. Disconnect the E8 ECU connector.
   

   
   
   
   

2. Disconnect the F2 meter connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   E8-9 (SPD) - F2-12 (+S)	Always	Below 1Ω

1. Remove the combination meter assembly (CAMRY_ACV40 RM0000024D701JX.html).
   

2. Reconnect the F15 connector to the combination meter assembly.
   

3. Reconnect the E8 connector to the main body ECU.
   

4. Connect an oscilloscope to terminal F15-3 (SPD) and body ground.
   

5. Turn the engine switch on (IG).
   

6. Turn the wheel slowly.
   

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

   Item	Condition
   Tool setting	5 V/DIV., 10 ms./DIV.
   Vehicle condition	Driving at approx. 20 km/h (12 mph)

   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 increase, the width indicated by (A) in the illustration narrows.

1. Disconnect the 3M connector from the No. 3 junction block.
   

   
   
   
   

2. Measure the resistance according to the value(s) in the tale below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   3M-10 - E8-9 (SPD)	Always	Below 1 Ω
   3M-10 - Body ground	Always	10 kΩ or higher

   HINT:

   If the result of the inspection for a short circuit is not as specified, there may be a short in the ECU.

1. Disconnect the 3P connector from the No. 3 junction block.
   

   
   
   
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   3P-3 - F2-12 (+S)	Always	Below 1 Ω
   3P-3 - Body ground	Always	10 kΩ or higher