Toyota Sienna Service Manual: Communication Error from VSC to ECM
DTC P1630 Communication Error from VSC to ECM
DTC U0122 Lost Communication with Vehicle Dynamics Control Module
DESCRIPTION
The skid control ECU sends signals such as cruise control cancel demand signals and brake operation demand (from ECM) response signals to the ECM when the dynamic laser cruise control system is in operation.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
P1630 |
While the dynamic laser cruise control is either preparing for operation or operating, if communication data from the skid control ECU is logically inconsistent for a certain amount of time, the ECM records this logical error code |
|
|
U0122 |
While dynamic laser cruise control is either preparing for operation or operating, if communication data from the skid control ECU is invalid for a certain amount of time, the ECM records this communication cut off code |
|
INSPECTION PROCEDURE
HINT: This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.
1 CHECK CAN COMMUNICATION SYSTEM
Refer to HOW TO PROCEED WITH TROUBLESHOOTING
END
Distance Control ECU Malfunction
DTC P1617 Distance Control ECU Malfunction
DESCRIPTION
In the dynamic laser cruise control system, the ECM and the distance control
ECU communicate with one
another to control the system based on ...
Communication Error from ECM to VSC
DTC P1631 Communication Error from ECM to VSC
DTC U0100 Lost Communication with ECM/PCM "A"
DESCRIPTION
The ECM sends signals such as A/T information signals, dynamic laser cruise
contr ...
Other materials:
Diagnosis system
1. DESCRIPTION
(a) When troubleshooting OBD II vehicles, the only
difference from the usual troubleshooting procedure
is to connect an OBD II scan tool complying with
SAE J1987 or a intelligent tester to the vehicle, and
read off various data output from the vehicle's ECM.
(b) OBD II reg ...
Absence of Registration Unit/ No Response for Connection Check/ Last Mode
Error/ No Response Against ON / OFF Command/ Mode Status Error/ Slave Reset
DTC 01-D5 Absence of Registration Unit
DTC 01-D8 No Response for Connection Check
DTC 01-D9 Last Mode Error
DTC 01-DA No Response Against ON / OFF Command
DTC 01-DB Mode Status Error
DTC 01-DE Slave Reset
DESCRIPTION
HINT:
*1: Even if no fault is present, this trouble code may b ...
Disassembly
1. Remove repair service starter kit
(a) Remove the nut and disconnect the lead wire from
the repair service starter kit.
(b) Remove the 2 screws which are used to secure the
repair service starter kit to the repair service starter
kit.
(c) Remove the repair service starter kit.
( ...
