ESCL(Electronic Steering Column Lock) is a system to control the lock or unlock of the Steering Column.It is installed on steering column and SMK unit is located inside of instrument panel, left knee of driver side. It consists of ESCL control Module, SMK unit, SSB(engine Start Stop Button)
It is operating as follows.
1. Pushing SSB → 2. Switch 1 signal goes to SMK, Switch 2 signal goes to SMK unit → 3.SMK supplies power supply to ESCL → 4.SMK unit sends ENABLE signal and operation signal to ESCL → 5.ESCL controls bolt to lock or unlock ESCL → 6.SMK detects ESCL Unlock signal.
SMK unit receives ESCL lock or unlock status signal from ESCL.
The purpose of this DTC is to find out the main reason of malfunction of ESCL when lock/unlock is attempted.
The DTC is set if SMK unit detects malfunction of ESCL and wiring or fuse problem when ESCL lock/unlock attempt.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
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ESCL unit internal malfunction and lock/unlock status checked by SMK Unit via communication from ESCL | 1. Poor connection in harness or connector 2. Open/short in SMK fuse 3. ESCL power / GND circuit in SMK unit harness 4. Communication line between SMK unit and ESCL 5. ESCL unlock line between SMK unit and ESCL 6. ESCL enable line between SMK unit and ESCL 7. Inconsistency adaptation status between SMK unit and ESCL 8. Abnormal ESCL power control from SMK unit 9. SMK Unit 10. ESCL |
Enable Conditions |
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Battery voltage applied to Smartkey Unit - Check the following conditions related with ESCL 1. ESCL internal malfunction 2. Open or short to battery/ground in harness 3. Open or short to battery/ground in communication line 4. Open at ESCL enable line in SMK Unit harness 5. Open or short at ESCL Unlock line in SMK Unit harness - DTC recorded if below conditions are met 6. No power supply to SMK Unit 7. Short to battery in power relay of SMK Unit 8. SMK unit actuation test 9. Adaptation completion using different PIN codes between SMK Unit and ESCL | |
Threshold value |
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No condition match as below ; - ESCL lock/unlock reference voltage level in SMK unit - ESCL lock/unlock status data receiving from communication in SMK unit | |
Diagnostic Time |
•
5 times consecutive ESCL error No condition match as below ; | |
Failsafe |
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Immediately after ESCL motor activates normally |
