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HOMESERVICE MANUALSAUDI2010A3 2.0T, 2.0 E, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 4 (3.2L - GENERIC SCAN TOOL - ENGINE CODE(S): BUB)ST GENERIC SCAN TOOLDESCRIPTION AND OPERATIONMOTRONIC FUEL INJECTION SYSTEMENGINE COOLANT TEMPERATURE SENSOR, CHECKINGCHECKING WIRING
2010 Audi A3 2.0T, 2.0 E, Standard

Checking wiring

2010 Audi A3 2.0T, 2.0 E, StandardSECTION Checking wiring
WARNING: This page is about a different car, the 2007 Audi A3 and 2006 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

If the manufacturers test box is being used. Perform the following step.

-- Install the test box. Refer to Repair information.

If the manufacturers test box is not being used. Perform the following step.

-- Remove the Motronic Engine Control Module (ECM) -J220-. Refer to MOTRONIC ENGINE CONTROL MODULE, REPLACINGΒ .

-- Using a Multimeter --, check the Engine Coolant Temperature (ECT) Sensor - G62- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J220- electrical harness connector T121 terminals for an open circuit according to the wiring diagram.

Fig 1: Identifying 2-Pin Electrical Connector & Terminals
GWWA28-0040Courtesy of AUDI OF AMERICA, LLC
Engine Coolant Temperature (ECT) Sensor - G62- electrical harness connector terminals Motronic Engine Control Module (ECM) -J220- electrical connector 121 terminals or test box socket
1 93
2 108

Specified value: 1.5 Ξ© Max.

If the specification was not obtained:

-- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

-- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring:

-- Replace the Motronic Engine Control Module (ECM) -J220-. Refer to MOTRONIC ENGINE CONTROL MODULE, REPLACINGΒ .

Final procedures

After repair work, the following work steps must be performed in the following sequence:

  1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORYΒ .
  2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORYΒ .
  3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODEΒ .

-- End of diagnosis.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.