P1631

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1631: Communication Error from ECM to VSC
P1631 - Communication Error from ECM to VSC

DESCRIPTION

The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU when the dynamic radar cruise control is in operation. The ECM is the only component that has a function to record and output the DTCs in the dynamic radar cruise control system. Therefore, if the skid control ECU detects a communication error from the ECM, it sends a malfunction signal back to the ECM.





INSPECTION PROCEDURE

NOTICE:
When the ECM is replaced with a new one, initialization must be performed Installation.

PROCEDURE

1. REPLACE ECM

(a) Replace the ECM (for 2UR-GSE) Components.

NEXT -- Continue to next step.

2. CHECK DTC

(a) Clear the DTCs Dynamic Radar Cruise Control System.

(b) Turn the cruise control main switch on.

(c) Drive the vehicle at a speed for which cruise control operation is possible.

(d) Check if the same DTC is recorded Dynamic Radar Cruise Control System.

Result:





B -- REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) Components

A -- END