DTC P1616 Communication Error from ECM to Distance Control ECU: Description
WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
The ECM receives signals from each sensor and ECU, and then sends signals such as A/T signals, cruise control operation signals, low speed operation signals, brake control operation signals, and laser light emission prohibiting signals, to the distance control ECU. The ECM is the only component that has a function to record and output the DTCs in the dynamic laser cruise control system. Therefore, if the distance control ECU detects a communication error from the ECM, it sends a malfunction signal back to the ECM.
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P1616 | While the dynamic laser cruise control is either preparing for operation or operating, if the ECM continuously receives a logical error signal from the distance control ECU for 0.15 seconds, the ECM records this logical error code |
|