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, PDM and SSB(engine Start Stop Button)
It is operating as follows
1.Pushing SSB ? 2. Switch 1 signal goes to PDM, Switch 2 signal goes to Smartkey Module ? 3.PDM 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.PDM detects ESCL Unlock signal.
Smartkey Module receives ESCL lock or unlock stuatus signal from ESCL and PDM(via CAN). And then, Smartkey Module compares PDM is lock or unlock signal with ESCL is lock or unlock signal.
If the both signals are unmathing, Smartkey Module sets DTC B1971.
Item
Detecting Condition
Possible cause
DTC Strategy
Check voltage and Data
Poor connection in harness or connector.
After battery voltage is supplied to Smartkey Module
- If IPM detects pins related ESCL are failed
1. Faulty ESCL control Module
2. Open or short in battery / ground curcuit of ESCL
3. Open or short to battery / ground in communicantion circuit of ESCL
4. Open in O_ESCL Enable circuit from Smartkey Module
5. Open or short in ESCL_Unlock circuit to PDM
- DTC is set although it is not ESCL fault
6. No battery voltage to PDM
7. Short to battery in power relay on the PDM line such as ACC, IGN1, IGN2, Starter Rly
8. When actuation test for PDM9. It is leant status but not with same PIN code for all Smartkey Module/PDM/ESCL
Faulty Smartkey Module
Faulty PDM
Faulty ESCL control Module
Enable Conditions
After battery voltage is suppiled to Smartkey Module
Threshold value
When both signal from ESCL lock or unlock status and PDM lock or unlock stuatus are unmatching
Failsafe
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