Volkswagen Golf Service & Repair Manual: Checking auxiliary air heater element - Z35- with auxiliary air heater control unit - J604-, RHD vehicles

Volkswagen Golf Service & Repair Manual / Heating, air conditioning / Air conditioner / Front heater and air conditioning unit / Checking auxiliary air heater element - Z35- with auxiliary air heater control unit - J604-, RHD vehicles

Checking

Special tools and workshop equipment required

Vehicle diagnostic tester with current probe 100 A -VAS 5051B/7-

Test conditions

Intake temperature less than 19° C

Coolant temperature less than 80° C

Passenger compartment temperature about 20° C

Battery voltage greater than 11 V

Alternator load not greater than 50 % (terminal DF)

Engine speed greater than 450 rpm

Turn rotary knob for interior temperature to highest temperature (on vehicles with Climatronic select highest level).

Test procedure

–	Remove centre console → General body repairs, interior; Rep. gr.68.

–	Remove glove compartment → General body repairs, interior; Rep. gr.68.

–	Detach dash board in vicinity of glove compartment far enough that dash board can be pulled away sufficiently to pull out auxiliary air heater element - Z35-.

–	Using vehicle diagnostic tester and current probe 100 A -VAS 5051B/7-, measure current draw -arrow- on earth wire -1- of auxiliary air heater element -Z35--2-.

Low heat output: ≈ 30 amps

Medium heat output: ≈ 60 amps

High heat output: ≈ 80 amps

Checking auxiliary air heater element - Z35- with auxiliary air heater control unit - J604-, RHD vehicles

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