P1616

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1616: Communication Error from ECM to Distance Control ECU
P1616 - Communication Error from ECM to Distance Control ECU

DESCRIPTION

The hybrid vehicle control ECU receives signals from each sensor and ECU, then sends signals such as cruise control operation signals, low speed operation signals, brake control operation signals, and radar light emission prohibiting signals to the driving support ECU. The hybrid vehicle control ECU 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 hybrid vehicle control ECU, it sends a malfunction signal back to the hybrid vehicle control ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ OUTPUT DTC (P1616)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

(e) 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.

(3) Push the -SET switch to activate the cruise control.

(f) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(g) Read the DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE HYBRID VEHICLE CONTROL ECU

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. REPLACE HYBRID VEHICLE CONTROL ECU

(a) Replace the hybrid vehicle control ECU Removal.

NEXT -- Continue to next step.

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P1616)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

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

(e) 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.

(3) Push the -SET switch to activate the cruise control.

(f) Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.

(g) Read the DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE DRIVING SUPPORT ECU Removal

A -- END