- Driving support ECU
- ECM
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZX9I |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - 11/2017] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P161681; Engine ECU to Distance Control ECU Invalid Serial Data Received; 2017 MY Sienna [08/2016 - 11/2017] | ||
|
DTC |
P161681 |
Engine ECU to Distance Control ECU Invalid Serial Data Received |
DESCRIPTION
The ECM receives signals from each sensor and ECU, then sends signals such as A/T signals, cruise control operation signals, low speed operation signals and brake control operation signals, to the driving support ECU. 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 driving support ECU detects a communication error from the ECM, it sends a malfunction signal back to the ECM.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
MIL |
|---|---|---|---|
|
P161681 |
While the dynamic radar cruise control is either preparing for operation or operating, if the ECM continuously receives a logical error signal from the driving support ECU for more than a specific amount of time, the ECM records this logical error code |
|
Does not come on |
PROCEDURE
|
1. |
REPLACE ECM |
(a) Replace the ECM (See page
![2017 - 2020 MY Sienna [08/2016 - ]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
|
|
2. |
CHECK DTC |
(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 P161681 is output |
B |
| A |
|
END |
| B |
|
|
|