fuel pump AUDI A4 1998 B5 / 1.G AFC Engine Fuel Injector Leak Testing And Delivery Quantity Checking Workshop Manual

24-34

Checking fuel injector leakage

CAUTION!

Fire hazard! Do not smoke, work near heaters
or open flame, or have anything in the area
that could ignite fuel.

- Use scan tool "Output Diagnostic Test Mode"
function 03 to trigger fuel pump relay -J17-
Repair Group 01.
- Visually inspect fuel injector for leaks (with fuel
pump running).

Maximum: Two drops per minute per fuel
injector
If fuel loss exceeds 2 drops per minute:

- Switch ignition OFF and replace leaking fuel
injector.

Note:
Always replace O-rings!
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24-35

Checking fuel injector delivery quantity

CAUTION!

Fire hazard! Do not smoke, work near heaters
or open flame, or have anything in the area
that could ignite fuel.

- Insert fuel injector to be tested into calibrated measuring container from
1602 fuel analyzer kit.

- Connect one terminal of each fuel injector being tested to engine
Ground (GND) using jumper wire from connector test kit VW 1594.
- Connect remaining fuel injector terminal to B+ using remote control
VAG 1348/3A, adapter wire VAG 1248/3-2 and jumper wire from
connector test kit VW 1594.
- Use scan tool "Output Diagnostic Test Mode" function 03 to trigger fuel
pump relay -J17- Repair Group 01. - Operate remote control VAG 1348/3A for 30 seconds.
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