B2059

PRE-COLLISION SYSTEM: B2059: Vehicle Speed Malfunction

DTC B2059 - Vehicle Speed Malfunction

DESCRIPTION

The distance control ECU uses the combination meter to send vehicle speed information to the ECM. The ECM and the skid control ECU use CAN communication to send vehicle speed information to the distance control ECU. This DTC is output when the difference between the vehicle speed information from the ECM and the skid control ECU is more than the specified value.






INSPECTION PROCEDURE
NOTE:
When the distance control ECU is replaced with a new one, INITIALIZATION must be performed. Pre-Collision System

PROCEDURE

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)
(a) Delete the DTC Pre-Collision System.
(b) Recheck for DTCs.
OK:
DTC U0100, U0122 or U1101 is not output.
NG -- GO TO CAN COMMUNICATION SYSTEM
OK -- Continue to next step.
2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)
(a) Check DTC for engine control system DTC Check / Clear.
OK:
DTC P0500 is not output.
NG -- GO TO ENGINE CONTROL SYSTEM
OK -- Continue to next step.
3. CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)
(a) Check DTC for vehicle stability control system Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC C0200, C0205, C0210, C0215, C1235, C1236, C1238 or C1239 is not output.
NG -- GO TO VEHICLE STABILITY CONTROL SYSTEM
OK -- Continue to next step.
4. READ VALUE USING TECHSTREAM
(a) Connect Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Check the Data List for proper functioning of the vehicle speed meter.
Combination Meter:






OK:
Vehicle speed displayed on the tester is almost the same as the actual vehicle speed.
NG -- GO TO COMBINATION METER SYSTEM
OK -- Continue to next step.
5. REPLACE DISTANCE CONTROL ECU ASSEMBLY
(a) Replace the distance control ECU assembly Removal.
NEXT -- Continue to next step.
6. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)
(a) Delete the DTC Pre-Collision System.
(b) Recheck for DTCs.
OK:
DTC B2059 is not output.
NG -- REPLACE SEAT BELT CONTROL ECU
OK -- END