4.
After erase DTC, keep the vehicle condition within "the enable conditions" (Refer to "DTC Detecting Condition" table).
This is DTC which is related with communication error between IPM and other units.
(※ Control Units : IPM(Inter Panel Module), FAM(Front Area Module), PDM(Power Distribution Module), DDM(Drive Door Module), ADM(Assist Door Module), CLU(Cluster), PSM(Power Seat Module), SCM(Steering Control Module), RAM(Rear Area Module), SMK(Smart Key)
The steering wheel lock/unlock state of ESCL and the required data when EMS(Engine Management System) controls starting are sent to PDM by the serial communication line.
*¹ CAN (Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.
*² LIN (Local Interconnect Network) : LIN is serial communication type which is used in electrical control system. (This is less expensive.)
This code is outputted when power circuit is shorted to battery.
(During no power supply from PDM to ESCL)
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● ESCL power output line check (by voltage monitoring) | ● Short to power in ESCL power circuit |
Enable Conditions | ● No power supply from PDM to ESCL | |
Threshold Value | ● ESCL power circuit is shorted to power (7V and above) | |
Diagnostic Time | ● Immediately | |
DTC Erasing Time | ● DTC is erased immediately after trouble fixed. (Under no power supply from PDM to ESCL state) |
Fig 1) ESCL Data Signal Waveform
Connect GDS.
IG "ON" and engine "OFF".
Select "DTC Analysis" mode.
After erase DTC, keep the vehicle condition within "the enable conditions" (Refer to "DTC Detecting Condition" table).
Is the same DTC occurred again?
 | ▶ Go to next procedure. |
 | ▶ Fault is intermittent caused by poor contact in ESCL's and/or PDM's connector or was repaired and PDM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
IG "OFF" and connect GDS.
IG "ON" and select "Current Data" menu.
Check the service data of ESCL BATT.
Specification : OFF
Is the service data within specifications?
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to next procedure. |
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
| ▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Component Inspection" procedure. |
IG "ON" & ENG "OFF".
Measure voltage between ESCL power terminal of PDM and chassis ground.
(Measure the voltage while ESCL doesn't work.)
Specification : Approx. 0 V
Is the measured voltage within specifications?
| ▶ Go to next procedure. |
| ▶ Check open or short on the power circuit between PDM and ESCL. Repair as necessary and go to "Verification of Vehicle Repair" |
IG "ON" & ENG "OFF"
Disconnect the connectors of IPM, PDM, ESCL.
Measure voltage between ESCL power terminal and chassis ground.
Specification : Approx. 0 V
Is the measured voltage within specifications?
| ▶ Substitute with a known - good ESCL and check for proper operation. If the problem is corrected, replace the unit and go to "Verification of Vehicle Repair" procedure. ▶ Substitute with a known - good PDM and check for proper operation. If the problem is corrected, replace the unit and go to "Verification of Vehicle Repair" procedure. |
| ▶ Repair as necessary and go to "Verification of Vehicle Repair". |
After a repair, it is essential to verify that the fault has been corrected.
Connect scan tool and select "DTC Analysis" mode.
Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
Is any DTC outputted again?
| ▶ Go to the applicable troubleshooting procedure. |
| ▶ System performing to specification at this time. |
