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 Smartkey Module is located inside of instrument panel, left knee of driver side.
It consists of ESCL control Module, Smartkey Module, SSB(engine Start Stop Button)
It is operating as follows
1.Pushing SSB → 2. Switch 1 & Switch 2 signal goes to SMARTKEY Module → 3.SMARTKEY Module supplies power supply to ESCL → 4.Smartkey Module sends ENABLE signal and operation signal to ESCL → 5.ESCL controls bolt to lock or unlock ESCL → 6.SMARTKEY Module detects ESCL Unlock signal.
Smartkey Module receives ESCL lock or unlock stuatus signal from ESCL and SMK(via CAN). And then, Smartkey Module compares SMK is lock or unlock signal with ESCL is lock or unlock signal. If the both signals are unmathing, Smartkey Module sets DTC B1978.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
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SMK Unit checks the open/close status of ESCL via Communication with ESCL | 1. Contact of the status of the Connectors 2. CAN communication 3. checking points of the SMK unit - ESCL_Unlock input status - Checking of the supply of the Voltage - Voltage , ground open, short - ESCL_DATA LINK open, short - ESCL ENABLE open, short |
Enable Conditions |
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When ESCL tries to do open/close operation
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When supplies the voltage of battery to the Smartkey Module (SMK IMMO unit) | |
Threshold value |
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ESCL related Pin error detect 1. ESCL internal faults 2. ESCL battery / ground line, battery/ground short and open 3. ESCL commmunication line battery/ground short and open 4. O_ESCL Enable line which outputs from the SMK open 5. ESCL_Unlock line which outputs from the SMK open | |
Failsafe |
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When ESCL related Pin error detect occurs over 5 counts excessively, The SMK unit displays a DTC |
