2.5L - Ignition/glow Plug System - Engine - Code(s): Cbta & Cbua: Overview Volkswagen Golf Mk7

IGNITION SYSTEM COMPONENT OVERVIEW

Note. For trouble free operation of the electrical components a voltage of at least 11.5 volts is necessary. It is possible that the control module will recognize a malfunction and store a Diagnostic Trouble Code (DTC) during some tests. After completing all checks and repairs, check the DTC memory and erase the memory, if necessary. If the engine only starts briefly and then shuts off again after troubleshooting, repairs or checking of the components, it may be that the immobilizer is blocking the Engine Control Module (ECM). The ECM may have to be adapted.

Scheme 13

1. Knock Sensor 2 Connector Gray Contacts are gold plated. Installed position (Scheme 14)
2. Knock Sensor 1 Connector Green Contacts are gold plated. Installed position (Scheme 14)
3. Knock Sensor 2 -G66- Installed position: The wire connection points 45° toward the right on the outside. Overview, refer to «KNOCK SENSOR OVERVIEW»(ref-481006-S25498125382012061900000).
4. Knock Sensor 1 -G61- Installed position: The wire connection points downward vertically. Overview, refer to «KNOCK SENSOR OVERVIEW»(ref-481006-S25498125382012061900000).
5. Bolt 20 Nm Tightening specification affects the function of the knock sensor.
6. Ignition Coil with Power Output Stage -N70, N127, N291, N292, N323- Removing and installing, refer to «IGNITION COIL WITH POWER OUTPUT STAGE»(ref-481006-S41471450922012061900000).
7. Spark Plug 25 Nm Type and electrode gap, refer to «TEST DATA AND SPARK PLUGS»(ref-481006-S00411605302012061900000). Remove and install using the spark plug removal tool 3122 B.
8. Bolt 10 Nm
9. Camshaft Position Sensor -G40- Contacts are gold plated.
10. O-ring Replace if damaged.

Scheme 14

1. Green for the knock sensor 1
2. Gray for the knock sensor 2

KNOCK SENSOR OVERVIEW

Note. Two sensors are installed knock sensor 1 and knock sensor 2.

Scheme 15

1. Cylinder Block
2. Locking Bolt 30 Nm With a rolled seal. The bore in the cylinder block is for locking the crankshaft with locking pin T40069.
3. Knock Sensor 1 -G61- Note the installed position: The wire connection points downward vertically.
4. Bolt 20 Nm Tightening specification affects the function of the knock sensor.
5. Bolt 10 Nm
6. Cover
7. Plug
8. Wire Clip Clamped on cover plate
9. Knock Sensor 2 -G66- Note the installed position: The wire connection points 45° toward the right on the outside.
10. Wire Bracket Bolted to Secondary Air Injection (AIR) valve.
11. Connector Green for the knock sensor 1. Installed position (Scheme 16) Contacts are gold plated.
12. Connector Gray for the knock sensor 2. Installed position (Scheme 16) Contacts are gold plated.

Scheme 16

1. Green for knock sensor 1
2. Gray for knock sensor 2