Home › Vehicle Interior › Theft Deterrent/Keyless Entry › SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function)
Last Modified: 11-27-2007 1.6 C
Service Category: Vehicle Interior Section: Theft Deterrent/Keyless Entry
Model Year: 2008 Model: LX570 Doc ID: RM000000XEV032X
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DESCRIPTION (2008 LX570)

DTC

B2282

Vehicle Speed Signal Malfunction

DTC

B2283

Vehicle Speed Sensor Malfunction

DESCRIPTION

The main body ECU and the combination meter are connected with a cable and the CAN communication line. DTC B2282 is stored when signals, transmitted through the cable and communication line, do not match.

DTC Code

Detection Condition

Trouble Area

B2282

When the following conditions are met:

  • Signals between the main body ECU and combination meter are inconsistent.
  • A malfunction is detected in the circuit between the vehicle speed sensor and combination meter.
  • Main body ECU
  • Combination meter assembly
  • Harness or connector

The skid control ECU converts signals from the speed sensor into 4-pulse signals and sends them to the combination meter. After these signals are converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, they are then transmitted to the main body ECU. The main body ECU determines the vehicle speed based on the frequencies of these pulse signals.

DTC Code

Detection Condition

Trouble Area

B2283

When both of the conditions below are met:

  • The vehicle speed decreases significantly.
  • The vehicle speed does not correspond with the engine speed.
  • Main body ECU
  • Combination meter assembly
  • Speed sensor
  • Skid control ECU
  • Harness or connector


WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL)

(a) Use the Data List to check if the vehicle speed signal is functioning properly.

Main 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

-

Result

Result

Proceed to

Display on the Techstream does not change according to vehicle condition

A

Display on the Techstream changes according to vehicle condition

B
A

2.

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


(a) Disconnect the E3 main body ECU connector.

(b) Disconnect the E77 combination meter connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E3-9 (SPD) - E77-6 (+S)

Always

Below 1 Ω

E3-9 (SPD) or E77-6 (+S) - Body ground

Always

10 kΩ or higher
OK

3.

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

(a) Temporarily replace the main body ECU with a new or normally functioning one.

(b) Check whether DTC B2282 and B2283 are output.

OK:

No DTC is output.

OK