C1613 ABS CAN Wrong Message

/ Brake DTCs / By
COMPONENT LOCATION

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GENERAL DESCRIPTION
The HECU send requirement data, such as Torque reduction, the number of fuel cut cylinders, and ESP control requests, to the Engine PCM(ECM & TCM) through CAN bus line.
The Engine PCM(ECM) performs fuel cut functions according to requests from the HECU and retards ignition timing by torque reduction requests.
The PCM(TCM) maintains current gear positions during ESP control time, in order not to increase power which causes a Kickdown shift.
DTC DESCRIPTION
The HECU checks the CAN communcation lines for normal ESP control, and sets this code if the data received between the EMS2 and TCM is not the same.
The HECU will not detect this code until 2 seconds after the IG KEY is turned ON.
DTC DETECTING CONDITION
 
ItemDetecting ConditionPossible cause
DTC Strategy
CAN message monitoring
Faulty PCM(ECM)
Faulty HECU
Enable Conditions
In case that the information about transmission is different in the EMS2 message and TCM message within normal voltage condition.
– The Monitoring starts 2000 ms after Power Up.
Fail Safe
Inhibit the ESP control and allow the ABS/EBD control.
The ESP warning lamp is activated.

 

DIAGNOSTIC CIRCUIT DIAGRAM

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COMPONENT INSPECTION
1.
Ignition “OFF”
2.
Ignition “ON” & Engine “OFF”.
3.
Connect scantool and select “Diagnostic Trouble Codes(DTCs)” mode.
4.
Using a scantool, Clear DTC.
5.
Select “Diagnostic Trouble Codes(DTCs)” mode again.
6.
Are any DTCs present ?
 

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▶ Substitute with a known-good PCM(ECM) and check for proper operation. If problem is corrected, replace PCM(ECM) 
If NG, replace HECU .

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▶ Fault is intermittent caused by faulty HECU, faulty PCM(ECM) or was repaired and HECU memory was not cleared.

 

 

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