Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VII9
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1616; Communication Error from ECM to Distance Control ECU; 2016 MY Sienna [12/2015 - 08/2016]

DTC

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 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

P1616

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

  • Driving support ECU
  • ECM

PROCEDURE

1.

REPLACE ECM

(a) Replace the ECM (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): ECM: REMOVAL ).

NEXT

2.

CHECK DTC

(a) Clear the DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR ).

(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 2016 MY Sienna [12/2015 - 08/2016]; CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC is not output

A

DTC P1616 is output

B

A

END

B

REPLACE DRIVING SUPPORT ECU