Checking resistance and wiring

Knock Sensor (KS) 1 -G61-

• Separate 3-pin connector to Knock Sensor (KS) 1 -G61- (arrow) on right of cylinder head.
Fig 1: Separating 3-Pin Connector To Knock Sensor 1, -G61-
Courtesy of VOLKSWAGEN OF AMERICA, INC.
• Measure resistance between terminals 1 and 2, 1 and 3, and 2 and 3 at connector to Knock Sensor (KS) 1 -G61-.

  Specification: INFINITY Ω

  Fig 2: Measuring Resistance Between Terminals 1 & 2, 1 & 3, 2 & 3 At Knock Sensor 1, -G61-

  Courtesy of VOLKSWAGEN OF AMERICA, INC.

  Knock Sensor (KS) 2 -G66-

• Disconnect 2-pin connector from Knock Sensor (KS) 2 -G66- (arrow) (on intake side of cylinder head).
Fig 3: Disconnecting 2-Pin Connector From Knock Sensor 2, -G66-
Courtesy of VOLKSWAGEN OF AMERICA, INC.
• Measure resistance between terminals 1 and 2 at connector to Knock Sensor (KS) 2 -G66-.
Fig 4: Measuring Resistance Between Terminals 1 And 2 At Knock Sensor 2, -G66-
Courtesy of VOLKSWAGEN OF AMERICA, INC.

Specification: INFINITY Ω

If the specifications are not obtained:

• Replace Knock Sensor (KS) -G61- or -G66-. See item  7 or item  17.
• Check DTC memory, repair malfunctions if necessary and then erase DTC memory. See DTC MEMORY .
• Read readiness code. See READ READINESS CODE . If DTC memory has been erased or Engine Control Module (ECM) was disconnected from battery positive, readiness code must be generated again. See GENERATING READINESS CODE .

  If the specifications are obtained:

• Remove wiper arms and cowl panel:

  See Plenum Chamber Cover Removal & Installation

• Connect VAG 1598/31 test box to control module wiring harness. Engine Control Module (ECM) remains disconnected.
Fig 5: Connecting VAG 1598/31 Test Box To Control Module Wiring Harness
Courtesy of VOLKSWAGEN OF AMERICA, INC.

Knock Sensor (KS) 1 -G61-

• Check wiring for open circuit between test box and 3-pin connector referring to Electrical Wiring Diagrams

  terminal 1 and socket 106

  terminal 2 and socket 99

  terminal 3 and socket 108

  Wire resistance: max. 1.5 Ω

Fig 6: Identifying Knock Sensor 1 (-G61-) 3-Pin Harness Connector Terminals
Courtesy of VOLKSWAGEN OF AMERICA, INC.
• Additionally check wires for short to one another.

  Specification: INFINITY Ω

  Knock Sensor (KS) 2 -G66-

• Check wiring for open circuit between test box and 2-pin connector referring to Electrical Wiring Diagrams.

  terminal 1 and socket 107

  terminal 2 and socket 99

  Wire resistance: max. 1.5 Ω

Fig 7: Identifying Knock Sensor 2 (-G66-) 2-Pin Harness Connector Terminals
Courtesy of VOLKSWAGEN OF AMERICA, INC.
• Additionally check wires for short to one another.

  Specification: INFINITY Ω

  If no wiring malfunction is detected:

• Loosen knock sensor and tighten again to 20 Nm.
• Repeat functional check.
• Check control module DTC memory again.

  If malfunction is still present:

• Replace Knock Sensor (KS) -G61- or -G66-. See item  7 or item  17.
• Check DTC memory, repair malfunctions if necessary and then erase DTC memory. See DTC MEMORY .
• Read readiness code. See READ READINESS CODE . If DTC memory has been erased or Engine Control Module (ECM) was disconnected from battery positive, readiness code must be generated again. See GENERATING READINESS CODE .