DTC    B2624    Vehicles Speed Malfunction

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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 it is connected to the network by outputting a specified signal (periodical signal) onto the communication bus on a regular schedule. 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 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.


INSPECTION PROCEDURE

1.CHECK OTHER DTC OUTPUT

  1. Check if 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 for the multiplex communication system.



B
REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A


2.READ VALUE ON INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3

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

  1. Select "Tilt & Telescopic".

  1. Select "Freeze Speed Info" from data list.

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

    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 → Same speed as indicated on speedometeer → 0 km/h

    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 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