Dtc B2624 Vehicles Speed Malfunction

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

READ VALUE OF INTELLIGENT TESTER (SPEED SIGNAL)

DTC B2624 Vehicles Speed Malfunction


DESCRIPTION

The multiplex tilt & telescopic ECU forms a network with the ECUs of other systems through the communication bus. Each ECU informs the other ECUs that they are connected to the network by outputting a specified signal (periodic signal) onto the communication bus on a regular basis. The multiplex tilt & telescopic ECU receives vehicle speed signals from the combination meter via the communication bus to prevent improper operation of the auto away/return function during driving.

DTC No.
Detection Item
Trouble Area
B2624
  1. The auto away function is disabled with the last vehicle speed signal (*1) of 10 km/h (6 mph) or more.
  2. Vehicle speed signal is lost for 5 seconds or more and the auto away/return function is disabled.
  1. Multiplex communication system
  2. Combination meter
  3. Multiplex tilt & telescopic ECU
HINT:
(*1):
If the engine switch is turned off immediately after the vehicle comes to a sudden stop, the last vehicle speed signal may not be 0 km/h (0 mph).

INSPECTION PROCEDURE

1.CHECK ANY OTHER DTCS OUTPUT (MULTIPLEX COMMUNICATION SYSTEM)

  1. Check if multiplex communication system DTC B1271 is output.

    Result:

    DTC Condition
    		Proceed to
    No output
    		A
    B1271 is output
    		B
    HINT:
    DTC B1271 indicates a combination meter communication stop malfunction in the multiplex communication system.


B
REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A


2.READ VALUE OF INTELLIGENT TESTER (SPEED SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester on.

  1. Select "Freeze Speed Info" from DATA LIST.

  1. Check the vehicle speed signal on the tester screen.

    TILT & TELESCO:
    Item
    		Measurement Item / Range (Display)
    		Inspection Condition
    		Standard
    Freeze Speed Info
    		Vehicle speed data / min.: 0 km/h (0 mph), max.: 255 km/h (158 mph)
    		Stop → Drive → Stop
    		0 km/h (0 mph) → Same speed as indicated on speedometer → 0 km/h (0 mph)

    Result:

    Result
    		Proceed to
    OK
    		A
    NG (Tester indication is abnormal)
    		B
    NG (Meter indication is abnormal)
    		C
    HINT:
    Vehicle speed of 3 km/h (2 mph) or more may be displayed on the tester screen immediately after the vehicle comes to a sudden stop. This is caused by a delay in vehicle signal input via the communication bus and not a malfunction.


B
REPLACE MULTIPLEX TILT & TELESCOPIC ECU

C
CHECK COMBINATION METER SYSTEM
A

REPLACE MULTIPLEX TILT & TELESCOPIC ECU