Checking activation

• Disconnect connectors from all six fuel injectors. (afterward check DTC memory)
  Fig 1: Identifying Ignition Coil Power Output Stage 5-Pin Harness Connector Terminals

  
• Connect VAG1527B voltage tester as follows:
  IGNITION COIL POWER OUTPUT STAGE CIRCUIT TEST: ACTIVATION
  
  

  Harness connector Terminal	Measure to
  3	Engine Ground (GND)
  4	Engine Ground (GND)
  5	Engine Ground (GND)

• Operate starter for a few seconds.
  • LED must blink (brief blink signal).

If specified values are not obtained:

• Switch ignition off.
• 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 2: Connecting VAG1598/31 Test Box At Wiring Harness To ECM

  
• Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
  IGNITION COIL POWER OUTPUT STAGE CIRCUIT TEST
  
  

  Harness connector Terminal	VAG1598/31 test box Socket
  3	102
  4	103
  5	94

• Repair open circuit or short circuit if necessary.

If no malfunctions are found in wires:

• Replace Engine Control Module (ECM). See ENGINE CONTROL MODULE (ECM) (WITHOUT METAL ANTI-THEFT HOUSING), REPLACING .