DTC U2303 Immobilizer Unknown Signal Received (4JJ3 with DPD)

1. DTC U2303 description

The ECM communicates with the wireless access module and performs the immobilizer function. The ECM sends a request signal to the wireless access module. The ECM receives a response signal from the wireless access module. Both communication signals are sent and received via the CAN communication circuit. If the ECM receives a signal, which is outside the specifications, from the wireless access module, the DTC is set.

Diagnostic type list
Diagnostics (Type 1)	Models with radar sensors/stereo cameras
Diagnostics (Type 2)	Models without radar sensors and stereo cameras

2. Condition for setting DTC U2303

Condition for running the DTC

The ignition switch is ON.

Condition for setting the DTC

The ECM receives a signal, which is outside the specifications, from the wireless access module.

3. Action taken when DTC U2303 sets

The ECM does not illuminate the MIL or SVS indicator light. Refer to Action taken when DTC sets - Type D.

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

The ECM inhibits engine startup.

4. Condition for clearing DTC U2303

Refer to Condition for clearing the DTC - Type D.

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