3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM)
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes.
(b) Clear the DTCs See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Pre-Collision System.
(c) Recheck for DTCs.
OK:
DTC B2090 is not output.
NG -- REPLACE SEAT BELT CONTROL ECU
OK -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) See: Accessories and Optional
Equipment/Antitheft and Alarm Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed
With Troubleshooting
From 08/2009
PRE-COLLISION: PRE-COLLISION SYSTEM: B2090: Driving Support System Malfunction
B2090 - Driving Support System Malfunction
DESCRIPTION
The seat belt control ECU receives collision information from the driving support ECU and skid control ECU via CAN communication, and tightens
the seat belt by operating the motor inside the front seat outer belt.
When the driving support ECU detects a malfunction in the dynamic radar cruise control system and pre-collision system, the malfunction
information is sent to the seat belt control ECU, which outputs this DTC.
When DTC B2090 is detected, other DTCs are also stored by the driving support ECU (dynamic radar cruise control system and pre-collision
system).
INSPECTION PROCEDURE
HINT
When clearing the DTCs, first clear the DTC output from the driving support ECU (Pre-Collision 2), and then clear the DTC
output from the seat belt control ECU.
PROCEDURE
1. CHECK DTC OUTPUT (DYNAMIC RADAR CRUISE CONTROL SYSTEM)
(a) Check DTCs for dynamic radar cruise control system See: Cruise Control/Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Dynamic Radar Cruise Control System.
OK:
Dynamic radar cruise control system DTCs are not output.
NG -- GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM See: Diagnostic Trouble Code Descriptions/Dynamic Radar
Cruise Control System
OK -- Continue to next step.
2. CHECK DTC OUTPUT (DRIVING SUPPORT ECU (PRE-COLLISION 2))
(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
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