DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:P1617

DTC Code	DTC Name
P1617	Distance Control ECU Malfunction

DESCRIPTION

In the dynamic radar cruise control system, the ECM and driving support ECU communicate with one another to control the system based on certain designation information. If the designation information of the ECM and driving support ECU are different or the driving support ECU is malfunctioning, this DTC is stored.

DTC Code	DTC Detection Condition	Trouble Area
P1617	While the vehicle speed is 50 km/h (31 mph) or more with the cruise control switch on, a designation signal from the ECM and a designation return signal from the driving support ECU do not match or the driving support ECU is malfunctioning for 1 second.	Driving support ECU ECM

CAUTION / NOTICE / HINT

Note

When the driving support ECU or ECM is replaced with a new one, initialization must be performed Click here.

PROCEDURE

CONFIRM DESIGNATION INFORMATION
1. Confirm the designation information.
  1. Turn the ignition switch to ON.
  2. Turn the cruise control switch on.
  3. With the brake pedal depressed, push the cruise control switch to +RES 3 times within 3 seconds. Check that the skid control buzzer sounds at this time.
    
    OK
    
    The skid control buzzer sounds (initialization is performed).
    Note
    - Do not turn the light control switch on at this time as doing so causes the beam axis to deviate. If the light control switch is turned on by mistake, readjust the beam axis Click here.
    - If initialization cannot be performed, first inspect the stop light switch circuit, cruise control switch circuit and skid control buzzer circuit.
  4. Turn the ignition switch off.
NEXT
CHECK FOR DTC
1. Clear the DTCs Click here.
2. Perform the following to make sure the DTC detection conditions are met.
  
  Tech Tips
  
  If the detection conditions are not met, the system cannot detect the malfunction.
  1. Drive the vehicle at a speed of 50 km/h (31 mph) or more.
  2. Turn the cruise control switch on.
3. Check for DTCs Click here.
  
  OK
  
  DTC P1617 is not output.
OK
END

NG
REPLACE DRIVING SUPPORT ECU
1. Replace the driving support ECU Click here.
NEXT

OK
The skid control buzzer sounds (initialization is performed).

CHECK FOR DTC

Clear the DTCs Click here.
Perform the following to make sure the DTC detection conditions are met.

Tech Tips

If the detection conditions are not met, the system cannot detect the malfunction.
1. Drive the vehicle at a speed of 50 km/h (31 mph) or more.
2. Turn the cruise control switch on.

Check for DTCs Click here.

OK
DTC P1617 is not output.

Result
Result	Proceed to
OK	A
NG (for 1GR-FE)	B
NG (for 1KD-FTV)	C
NG (for 1GD-FTV)	D

END (DRIVING SUPPORT ECU IS DEFECTIVE)

REPLACE ECM Click here