DESCRIPTION
The ECM receives signals sent from the airbag sensor assembly (yaw rate and acceleration sensor) via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding ECU or sensor.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
---|---|---|---|---|---|
U0124 |
Lost Communication with Lateral Acceleration Sensor Module |
When the ignition switch is turned ON, there is no communication between the ECM and airbag sensor assembly (yaw rate and acceleration sensor) for 1.25 seconds or more (1 trip detection logic). |
|
Comes on |
DTC stored |
PROCEDURE
1. |
CLEAR DTC AND PERFORM ROAD TEST |
(a) Clear the DTCs.
Click here
Powertrain > Engine and ECT > Clear DTCsHINT:
Write down the currently output DTCs before clearing them.
(b) Start the engine and drive the vehicle at a low speed.
|
2. |
CHECK DTC OUTPUT (DTC U0124) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Powertrain > Engine and ECT > Trouble Codes(e) Read the DTCs using the Techstream.
Result |
Proceed to |
---|---|
DTC U0124 is not output |
A |
DTC U0124 is output |
B |
A |
CHECK FOR INTERMITTENT PROBLEMS |
B |
GO TO CAN COMMUNICATION SYSTEM |
Toyota CH-R Service Manual > Power Mirror Control System: System Diagram
SYSTEM DIAGRAM
ELECTRICAL REMOTE CONTROL MIRROR FUNCTION (w/o Retract Mirror)
ELECTRICAL REMOTE CONTROL MIRROR FUNCTION (w/ Retract Mirror)
MIRROR HEATER FUNCTION
Communication Table
Sender
Receiver
Signal
Communication Method
...
Toyota CH-R Service Manual > Airbag System: Occupant Classification System Malfunction (B1650/32,B165A/32)
DESCRIPTION
The airbag sensor assembly and occupant detection ECU communicate via CAN communication.
When the occupant detection ECU stores DTC B1771, B1780, B1782, B1795, B1798,
B1799, U0125 or U0129, the airbag sensor assembly receives this information and
stores DTC B1650/32.
When the occu ...