2018 / ECLIPSE CROSS / EC - Workshop Manual
37 -ELECTRIC POWER STEERING (EPS) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > Diagnosis code No.C1537 IG signal Failure
Code No.C1537 IG 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 (Refer to GROUP 54C, CAN Bus Diagnostics Table
 ). - Whenever ECU is replaced, ensure that the CAN bus lines are normal.
|
OPERATION
The EPS-ECU receives IG1 signal and it is used as a switch that activates/deactivate the EPS-ECU.
FUNCTION
The EPS-ECU monitors the IG voltage.
TROUBLE JUDGEMENT
Judgement Criterion
- When judging that the ignition key has been turned OFF during traveling
Fail Safe, Back Up Function
- When the failure is confirmed, sets the diagnosis code and continues the assist control until the vehicle stops.
PROBABLE CAUSES
| caution | This diagnosis code is also set even when the driver intentionally turns off the ignition switch while driving. In this case, it is not an abnormality of parts and there is no need to replace parts. |
- When the driver intentionally turns off ignition switch while driving.
- Defective harness wire(s) or connector(s)
- Open circuit between the EPS-ECU and ignition switch or loose connector contact
- Malfunction of the EPS-ECU
DIAGNOSIS PROCEDURE
1. Check if other ECU sets diagnosis code.
2. Check whether there is abnormality in the power supply circuit of Ignition system (Refer to GROUP 54A - Ignition Switch <Vehicles without KOS>, GROUP 42B - Symptom Chart <Vehicles with KOS>). 3. Replace the EPS-ECU (Refer to ).
