[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
17 -ENGINE AND EMISSION CONTROL > ADAPTIVE CRUISE CONTROL SYSTEM (ACC) > DIAGNOSIS CODE PROCEDURES > CODE NO. C1783: ACC DISTANCE SWITCH FIXED ON
Code No. C1783: ACC Distance Switch Fixed On
 
 
caution
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID .)
  • When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).
 
 
OPERATION
The ACC/FCM-ECU receives the ACC distance switch signal from the ETACS-ECU via CAN communication.
 
 
DIAGNOSIS CODE SET CONDITION
Check Conditions
  • More than 2 seconds have passed since the ignition switch was turned to "ON" position.
  • ACC/FCM-ECU power voltage is more than 9 V and is less than 18 V.
  • ACC system is ON.
Judgement Criterion
  • The ACC distance switch remains on for at least 1 minute.
 
 
PROBABLE CAUSES
  • Damaged harness wires and connectors
  • Malfunction of the clock spring.
  • Malfunction of cruise control switch (Integrated with ACC distance switch
  • Malfunction of ETACS-ECU
  • Malfunction of ACC/FCM-ECU

 
 
DIAGNOSIS PROCEDURE
STEP 1. Check the ETACS system data list.
Using M.U.T.-IIISE, check the ETACS system data list (Refer to GROUP 54A - ETACS, Troubleshooting, data list reference table ).
  • Item No.116: ACC distance switch
Is the check result normal?
Go to Step 6.
Go to Step 2.
 
STEP 2. Check the ACC distance switch.
Refer to .
Is the check result normal?
Go to Step 3.
Replace the cruise control switch (Integrated with ACC distance switch) (Refer to ).
 
STEP 3. Check of short to earth in DST+ line between ETACS-ECU connector and clock spring connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. Check of short to earth in DST+ line between clock spring connector and cruise control switch connector.
Is the check result normal?
Go to Step 5.
Repair the connector(s) or wiring harness.
 
STEP 5. Check the clock spring.
Refer to GROUP 52B - Driver’s Air Bag Module and Clock Spring Inspection .
Is the check result normal?
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
Replace the clock spring, and install the driver’s air bag module [Refer to GROUP 52B - Driver’s Air Bag Module and Clock Spring ].
 
STEP 6. M.U.T.-IIISE data list.
Check the following data list (Refer to ).
  • Item No.23: ACC distance switch state
Is the check result normal?
It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
Replace the ACC/FCM-ECU (Refer to ).