Scantool Diagnostics

Smart Key

B1978 Electric Steering Column Lock Failure - Scantool Diagnostics

Monitor Scantool data

Check DTC status
1. Check DTC on PDM side with scantool.
2. Check that there is any DTC on PDM side or ESCL side.
3. Inspect DTC related ESCL first if there is any DTC on the PDM side according to DTC troubleshooting guide.
4. After inspection and repair, erase DTC related ESCL.
5. Erase DTC B1971 ESCL failure on IPM side.
- It is case that DTC is set on PDM although it is not ESCL fault as follows
1. No battery voltage to PDM
2. Short to battery in power relay on the PDM line such as ACC, IGN1, IGN2, Starter Relay
3. When actuation test for PDM
4. It is leant status but not with same PIN code for all IPM/PDM/ESCL
6. Has the DTC gone after erasing DTC with scantool?





Check current Data
1. Select current data parameters related IPM with scantool.
2. Monitor "ESCL ENABLE" are normal.
3. Select current data parameter related PDM.
4. Monitor "ESCL BATTERY OUTPUT", "ESCL GND OUTPUT" and "ESCL UNLOCK STATE INPUT" are normal

Specification :
- Current Data parameter related IPM -
1.ESCL ENABLE : It is ON, if IPM sends enable signal to ESCL.




- Current Data parameter related PDM -
1.ESCL BATTERY OUTPUT : It will be changed form OFF to ON when PDM supplies operation voltage with PDM.
2.ESCL GND OUTPUT : It shows ON when ground for ESCL is O.K.
3.ESCL UNLOCK STATE INPUT : In case that ESCL bolts is unlock, it will be ON.




4. Are all parameters related ESCL functioning normally?