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YMMS: 2016 Audi A6 Premium Jun 3, 2020
Engine: 2.0L Eng License:
VIN: Odometer:
Map Controlled Engine Cooling Thermostat - F265-, Checking
General Description
The Map controlled Engine Cooling Thermostat -F265- can either open mechanically from engine
coolant temperature, or from the Engine control Module -J623-. Providing power to an electrical element
inside the Map controlled Engine Cooling Thermostat -F265- for more precise operation of the cooling
system based on a mapping table that is contained inside the Engine control Module -J623-.
Special tools and workshop equipment required
Multimeter.
Wiring Diagram.
Scan Tool.
Test Requirements
Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with automatic transmission, ensure the selector lever position is in "P".
Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake
applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .
Test Procedure
Step Procedure Result / Action to Take
-- YES:
PERFORM: Preliminary check to GO TO: Step 2
verify the customers complaint. Refer
1 -- NO:
to PRELIMINARY check .
GATHER more information from customer
-- Was Complaint verified?
about the complaint.
IGNITION: OFF.
-- YES:
DISCONNECT: Map controlled
Engine Cooling Thermostat -F265- GO TO: Step 3
harness connector.
check : Map controlled Engine -- NO:
2 Cooling Thermostat -F265-
component connector terminals 1 to REPLACE: Map controlled Engine Cooling
2 for resistance. Thermostat -F265-. Refer to appropriate
SPECIFIED VALUE: 5 - 15 Ω (@ Service Information.
approx. 20° C). GO TO: Step 5
-- Was Value obtained?
3 -- YES:
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IGNITION: ON. GO TO: Step 4
check : Map controlled Engine
Cooling Thermostat -F265- harness -- NO:
connector terminal 1 to ground for
PERFORM: Visual Inspection of wiring and
voltage.
component.
IGNITION: OFF.
check : Wiring for open, high resistance, short
SPECIFIED VALUE: Battery voltage.
or harness connector for damage, corrosion,
-- Was Value obtained? loose or broken terminals.
REPAIR: Faulty wiring or connector.
GO TO: Step 5
-- YES:
TIP: The Map controlled Engine Cooling
Thermostat -F265- may fail under loaded
REMOVE: Engine control Module - operation; please swap a known good Map
J623-. Refer to appropriate Service controlled Engine Cooling Thermostat -F265-
Information. prior to continuing to the next step.
check : Map controlled Engine GO TO: Step 5
Cooling Thermostat -F265- harness
4 -- NO:
connector terminal 2 to the Engine
control Module - J623- harness PERFORM: Visual Inspection of wiring and
connector T91 / 74 for resistance. component.
SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). check : Wiring for open, high resistance, short
or harness connector for damage, corrosion,
-- Was Value obtained?
loose or broken terminals.
REPAIR: Faulty wiring or connector.
GO TO: Step 5
-- YES:
check : Engine control Module - J623- harness
connector for any damaged, pushed-out pins.
REPAIR: As necessary.
If all electrical connections are OK:
REPLACE: Engine control Module - J623-.
Refer to appropriate Service Information.
Clear the DTC's. Refer to DIAGNOSTIC
Final Procedure MODE 04 - ERASE DTC MEMORY .
5 Perform a road test to verify repair. Repair is complete. Generate Readiness
Code. Refer to READINESS CODE .
-- Does the original DTC return?
Return vehicle to Customer.
-- NO:
Perform the diagnostic procedure for any
DTC's.
If no DTC's return, the repair is complete.
Return vehicle to customer.
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