Glow Plugs, Checking

NOTE:

Cylinder bank 1 is located in direction of travel, right.

Cylinder bank 2 is located in direction of travel, left.

Special tools and workshop equipment required

Test Prerequisites

Fuses in E-box (plenum chamber, left) must be OK: Refer to SYSTEM WIRING DIAGRAM

Fig 1: Identifying Fuse Holder
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Battery voltage must be at least 11.5 volts.
Ground (GND) connections between engine and chassis must be OK.
Ignition is switched off.

Test Sequence

NOTE:

Glow plugs for cylinder 1 and 6 can be checked without removing intake manifolds.

-- Remove intake manifolds if necessary.

-- Disconnect glow plug connectors from glow plugs.

-- Connect wire of voltage tester VAG1527 to plus pole in engine compartment (arrow) using adapter cables.

Fig 2: Identifying Glow Plug Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Attach test lead of voltage test lamp to each glow plug in succession.

LED lights up: Glow plug OK.

LED does not light up: Replace glow plug

-- Remove and install glow plugs using flex wrench 3220

Tightening torque: 15 Nm.