Checking wires to Engine Control Module (ECM)

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Connect test box to control module wiring harness. Refer to Test box, connecting for wiring test

Fig 1: Engine Control Module 3-Pin Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wires between test box and 3-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

Component	Connector	Test box
Knock Sensor (KS) 1 -G61-	Terminal 1	Socket 106
	Terminal 2	Socket 99
	Terminal 3	Socket 108

Component	Connector	Test box
Knock Sensor (KS) 2 -G66-	Terminal 1	Socket 107
	Terminal 2	Socket 99
	Terminal 3	Socket 108

Also check wires for short circuit to each other.

Specified value: ∞ Ω

If no malfunctions are found in wires:

Replace the respective knock sensor:

Knock Sensor (KS) 1 -G61-. Refer to Parts of the ignition (vehicles with engine code AFP), removing and installing , item 15
Knock Sensor (KS) 2 -G66-. Refer to Parts of the ignition (vehicles with engine code AFP), removing and installing , item 11

Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating