Up to 08/2009

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 ECM receives signals from each sensor and ECU, then sends signals such as A/T signals, cruise control operation signals, low speed operation signals, brake control operation signals, and radar light emission prohibiting 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.





INSPECTION PROCEDURE

PROCEDURE

1. REPLACE ECM

(a) Replace the ECM (for 2GR-FE) Components.

NEXT -- Continue to next step.

2. CHECK DTC

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

(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 (31 mph) or more.

(2) Turn the cruise control main switch on.

(c) Check for DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE DRIVING SUPPORT ECU Components

A -- END