C1702

DTC C1702 VARIANT CODING ERROR

COMPONENT LOCATION:

GENERAL DESCRIPTION
The HECU is programmed with a variant code based on the vehicle powertrain configuration. This variant code is used to determine the appropriate ESC calculations.

DTC DESCRIPTION
The HECU checks the variant code after ignition. If a inappropriate variant code is detected or there is no variant code, a fault is detected.

DTC DETECTING CONDITION:

MONITOR SCANTOOL DATA
VARIANT CODE
1. Check for improper installation of PCM (ECM & TCM)/ESC.
2. Connect scantool to Data Link Connector (DLC).
3. Ignition "ON".
4. Go in Anti-Lock brake system (figure 1).
5. Perform variant code.
6. Disconnect scantool.
7. Ignition "OFF" and then ignition "ON". Go to "Component Inspection"Procedure.





COMPONENT INSPECTION
1. Ignition "OFF".
2. Engine "ON".
3. Does warning lamp remain On?
YES
> Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.
NO
> Fault is intermittent caused by inoperative HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode
2. Using a scantool, Clear DTC.
3. Operate the vehicle within DTC Detecting Condition in General Information
4. Are any DTCs present?
YES
> Go to the applicable troubleshooting procedure.
NO
> System performing to specification at this time.