Toyota CH-R Service Manual: Lost Communication with Lateral Acceleration Sensor Module (U0124)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Lost Communication with Lateral Acceleration Sensor Module (U0124)

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).
  • CAN communication system
  • Airbag sensor assembly (Yaw rate and acceleration sensor)
  • ECM

Comes on

DTC stored

PROCEDURE

1.

CLEAR DTC AND PERFORM ROAD TEST

(a) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

HINT:

Write down the currently output DTCs before clearing them.

(b) Start the engine and drive the vehicle at a low speed.

NEXT

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

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