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)
*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.)
If the abnormal signal is received from MF Wiper SW to IPM for 2 seconds, for instance, Both Wiper low and Wiper high signal inputted together, IPM sets DTC.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Check all status of MF switch function | ● Check MF front wiper switch circuit ● Replace IPM after checking all the function of MF switch |
Enable Conditions | ● IG KEY ON. | |
Threshold Value | ● - | |
Diagnostic Time | ● 2 seconds after failure occurs | |
DTC Erasing Time | ● DTC is erased immediately after trouble fixed (In case of the past error, perform DTC erasing procedure.) |
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 the sensor's and/or IPM's connector or was repaired and IPM 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. |
Connect GDS.
IG "ON" & ENG "OFF".
Select "Current Data" mode.
Check Operating Status of Front Wiper / Washer parameter.
Specification : ON or OFF
Are all front wiper / washer SW parameter normal ?
| ▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Terminal and Connector Inspection" 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 "Signal Circuit Inspection" procedure. |
Disconnect battery (-) cable after IG "OFF".
Disconnect MF switch and IPM connetor.
Check resistance between one and another terminal of front wiper / washer of MF switch goes to IPM.
Specification : About ∞ Ω
Is the measured resistance within specification ?
| ▶ Substitute with a known - good IPM and check for proper operation. If the problem is corrected, replace the IPM and go to "Verification of Vehicle Repair" procedure. ▶ Substitute with a known - good MF switch and check for proper operation. If the problem is corrected, replace the MF switch and go to "Verification of Vehicle Repair" procedure. |
| ▶ Check short in signal harness of front wiper / washer switch at MF switch, connected to to IPM, repair as necessary and then, go to "Verification of Vehicle Repair" procedure. |
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. |
