DTC U023A Lost Communication with CAMERA Control Unit (4JJ3 with DPD)

1. DTC U023A description

The ECM and stereo camera communicate the control information and diagnosis information via the CAN communication circuit. The ECM monitors the CAN operational status by expecting a constant message flow from each module. If the ECM fails to receive an expected message, the DTC is set.

2. Condition for setting DTC U023A

Condition for running the DTC

The battery voltage is 8 to 16 V.
3 seconds or more have passed since the ignition switch was turned ON.
DTC U0001 is not set.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U0001 High Speed CAN Communication Bus".

Condition for setting the DTC

The ECM detects that CAN messages from the stereo camera are not received.

3. Action taken when DTC U023A sets

The ECM illuminates the SVS indicator light. Refer to Action taken when DTC sets - Type C.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

4. Condition for clearing DTC U023A

Refer to Condition for clearing the SVS indicator light/DTC - Type C.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".