- Communication circuit
- ECM
- Brake actuator assembly (Skid control ECU)
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIIC |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 08/2016] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1631; Communication Error from ECM to VSC; 2016 MY Sienna [12/2015 - 08/2016] | ||
|
DTC |
P1631 |
Communication Error from ECM to VSC |
DESCRIPTION
The ECM sends signals such as 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.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P1631 |
While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a logical error signal from the skid control ECU for a certain amount of time, the ECM records this logical error code |
|
PROCEDURE
|
1. |
CHECK DTC (CAN COMMUNICATION SYSTEM) |
(a) Check for DTCs (See page
![2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM](/t3Portal/stylegraphics/info.gif)
).
| NG |
|
|
|
2. |
REPLACE ECM |
(a) Replace the ECM (See page
).
|
|
3. |
CHECK DTC (RADAR CRUISE CONTROL SYSTEM) |
(a) Clear the DTCs (See page
).
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
(1) Drive the vehicle at a speed of 50 km/h (30 mph) or more.
(2) Turn the cruise control main switch on.
(c) Check for DTCs (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC P1631 is output |
B |
| A |
|
END |
| B |
|
|
|