Heated Glass Element: Testing and Inspection

Special tools, testers and auxiliary items
- VAG1715 multimeter (with current probe)
- VAG1594 adapter set

Test conditions
- All fuses OK according to wiring diagram

- Switch ignition off.
- Remove A/C control head -E87-.





- Disconnect harness connector E from A/C control head -E87-.
- Switch ignition on.
- Measure voltage between terminals -1-and -2-.
Specification: approx. battery voltage
- Switch ignition off.
- Connect harness connector E to A/C control head -E87-.

Route wire -A- to harness connector E through current probe on VAG1715.

NOTE: All harness connectors are plugged into the A/C control head -E87-.

- Select "Amperage measurement via amperage probe" function on VAG1715.
- Start engine.
- Switch rear window heating on via A/C control head -E87- (indicator lamp in button lights up).
- The display on the VA51715 will change from approx. 0 amps to less than 25 amps.
- After about 10 minutes the display will change from less than 25 amps to approx. 0 amps (indicator lamp in button goes out).

NOTES:
- The current probe may be influenced by stray current which could cause the display to show a low current reading when the rear window heating is switched off.
- The A/C control head -E87- will switch the rear window heating off after 10 minutes.