Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - CRUISE CONTROL
CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM)
DTC 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 50 km/h (30 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
INSPECTION PROCEDURE
| 1.REPLACE ECM |
for 1UR-FE:
Replace the ECM with a new one ().
for 3UR-FE:
Replace the ECM with a new one ().
| NEXT | |
| 2.CHECK DTC (DYNAMIC RADAR CRUISE CONTROL SYSTEM) |
Using the intelligent tester, enter the following menus: Powertrain / Radar Cruise / Trouble Code.
Clear the DTCs ().
Perform the following to make sure the DTC detection conditions are met.
- HINT:
- If the detection conditions are not met, the system cannot detect the malfunction.
Drive the vehicle at a speed of 50 km/h (30 mph) or more.
Turn the cruise control main switch on to set the vehicle-to-vehicle distance control mode to the standby state.
Check for DTCs ().
| Result | Proceed to |
| OK (DTC P1631 is not output) | A |
| NG (for LHD) | B |
| NG (for RHD) | C |
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| A | ||
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