Checking wire connections

• Connect VAG1598/31 test box at wiring harness to ECM; do not connect ECM. See WIRE AND COMPONENT TEST USING VAG1598/31 TEST BOX .
  Fig 1: Identifying Intake Air Temperature Sensor Harness Connector Terminals

  
• Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
  INTAKE AIR TEMPERATURE SENSOR CIRCUIT TEST
  
  

  Harness connector Terminal	VAG1598/31 test box Socket
  1	85
  2	108

• Check both wires to each other for short circuit.
• Repair open circuit or short circuit if necessary.

If no malfunctions are found in wire: