Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 2021t ciu01226
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05-2030
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM 05BEH-02
DTC U0122/64 LOST COMMUNICATION WITH VEHICLE
DYNAMICS CONTROL MODULE
CIRCUIT DESCRIPTION
The skid control ECU and ECM always communicate the data for vehicle general control and diagnosis func-
tion each other through communication line.
The dynamic laser cruise control system receives information about the laser radar sensor, steering angle
sensor and yawrate sensor from the skid control ECU (brake actuator assy). It identifies the vehicle in front
and follows it keeping a proper vehicle-to-vehicle distance.
DTC No. DTC Detecting Condition Trouble Area
The malfunction code is output when communication between
the skid control ECU and ECM is invalid for 0.5 sec. or more S Communication circuit
U0122/64 while the dynamic radar sensor is in operation, or the commu- S Skid control ECU (Brake actuator assy)
nication from the skid control ECU become logically discordant S ECM
for 0.5 sec. or more.
WIRING DIAGRAM
Brake Actuator Assy
(Skid Control ECU) ECM
8 10 J/C 27 25
TRC+ S3 LG-B J3 LG-B
J4 E4 TRC+
22 9 26 31
LG-R LG-R
TRC- S3 J3 J4 E4 TRC-
I34879
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2213
05-2031
DIAGNOSTICS - DYNAMIC LASER CRUISE CONTROL SYSTEM
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS AND CONNECTOR(ECM - SKID CONTROL ECU)
(a) Check for an open or short circuit in harness and connector between the ECM and the skid control ECU
(See page 01-37 ).
NG REPAIR OR REPLACE WIRE HARNESS OR
CONNECTOR
OK
2 REPLACE BRAKE ACTUATOR ASSY(SKID CONTROL ECU) (See page 32-46 )
HINT:
S If the problem still occurs after the replacement, replace the ECM.
S When a malfunction is found in the skid control ECU, replace the brake actuator assy.
REPLACE ECM (See page 10-17 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2214
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