[ 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. C1787: APS SIGNAL
Code No. C1787: Accelerator Pedal Position Signal Failure
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • When the ACC/FCM-ECU is replaced, calibrate the radar (refer to ).
 
 
OPERATION
ACC/FCM-ECU communicates with the engine-ECU via the CAN bus lines.
 
 
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.
Judgement Criterion
  • Abnormality is detected in the accelerator pedal opening angle signal received from the engine-ECU.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • Malfunction of the engine-ECU
  • Malfunction of the ACC/FCM-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics.
Use M.U.T.-IIISE to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Can Bus Diagnostics Table ).
 
STEP 2. Check whether the diagnosis code is set again.
Is diagnosis code No.C1787 set?
Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU ). Then go to Step 3.
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 ).
 
STEP 3. Check whether the diagnosis code is set again.
Is diagnosis code No. C1787 set?
Replace the ACC/FCM-ECU (Refer to ).
This diagnosis is complete.