DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1631

DTC Code DTC Name
P1631 Communication Error from ECM to VSC

DESCRIPTION

The distance control ECU sends brake control request signals, warning request signals, etc. to the master cylinder solenoid (skid control ECU) through the ECM. Based on these signals, the brake actuator operates and the warning buzzer sounds. The master cylinder solenoid (skid control ECU) sends brake system malfunction signals, etc. to the ECM.

DTC Code DTC Detection Condition Trouble Area
P1631 The vehicle speed is 40 km/h (25 mph) or more with the cruise control main switch on (vehicle-to-vehicle distance control mode) and the data sent from the ECM to the master cylinder solenoid (skid control ECU) is abnormal.

  • Master cylinder solenoid (skid control ECU)

  • CAN communication system

  • ECM

WIRING DIAGRAM

A01ERRQE05

INSPECTION PROCEDURE

PROCEDURE


  1. REPLACE ECM


    1. Replace the ECM with a new one Click here.


    NEXT

  2. CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)


    1. Using the intelligent tester, enter the following menus: Powertrain / Radar Cruise / Trouble Code.

    2. Clear the DTCs Click here.

    3. Perform the following to make sure the DTC detection conditions are met.

      Tech Tips

      If the detection conditions are not met, the system cannot detect the malfunction.


      1. Drive the vehicle at a speed of 40 km/h (25 mph) or more.

      2. Turn the cruise control main switch on to set the vehicle-to-vehicle distance control mode to the standby state.

    4. Check for DTCs Click here.

      Result
      Result Proceed to

      OK

      (DTC P1631 is not output)

      		 A

      NG

      (for LHD)

      		 B

      NG

      (for RHD)

      		 C

    B

    REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) Click here

    C

    REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) Click here

    A

    END