Park Assist System

U0423 - Implausible Data Received From Instrument Cluster

For a complete wiring diagram, refer to.

• When Monitored: Park assist module supply voltage between 9-16 volts. Ignition in Run/Start.

• Set Condition: Ignition status = 7h






Test Step 1 - Check For Active DTC

• Turn the ignition ON.

• With the scan tool, record and erase park assist module DTCs.

• Wait 30 seconds.

• With the scan tool, read park assist module DTCs.

Is this DTC active?

Yes

• Go to Test Step 2

No

• The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Instrument Cluster Is Active On the CAN C Interior Bus

• With the scan tool, select ECU View.

• Verify that the instrument cluster is active on the bus.

Is the instrument cluster active on the bus?

Yes

• Go to Test Step 3

No

• Refer to the appropriate section and perform the no response diagnostic procedures.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - DTCs Stored Or Active In the Instrument Cluster

• Check for ignition switch DTCs in the instrument cluster.

Are any DTCs active or stored in the instrument cluster?

Yes

• Refer to the appropriate section and perform the diagnostics for the DTCs.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 4

Test Step 4 - Active DTCs In the TIPM

• With the scan tool, select ECU View and select TIPM.

• With the scan tool, read active DTCs.

Are any communication DTCs active in the TIPM park assist system?

Yes

• Refer to the appropriate section and perform the diagnostics for the DTCs.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace and program the park assist module.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior