Engine - Exhaust Smoke, Intermittently Visible

Group: 23

Number: 97-02

Date: Feb. 19, 1997

Subject:
Exhaust Smoke, Intermittently Visible

Model(s):
Passat with (Engine Code 1Z) 1996
Turbo Direct Injection (TDI),

Supersedes T.B. Group 23 Number 97-01 dated Jan 28, 1997

Condition

Visible smoke from exhaust system when accelerating (e.g., taking off from a stop or when shifting gears).

Note:
Condition is intermittent

Production

New Engine Control Module (ECM) and injectors installed beginning m.y. 1997.

Production

If condition exists:

- Replace ECM with Part No.: 028 906 021GQ.

- Replace injectors 1, 2, and 4 with Part No.: 028 130 202P

- Replace injector No. 3 with Part No.: 028 130 202Q

- Replace injector sealing washers Part No: 046 130 219A

Note:
Always replace injector sealing washers between cylinder head and injector.

CAUTION!
Part numbers are for reference only. Always check with your Parts Dept. for the latest parts information.

- Connect VAG 1551 Scan Tool.

- Press button 1 to enter Rapid Data Transfer.

- Press buttons 01 to select Address word "Engine Electronics".

- Press -> button.

- Press buttons 07 to select function 07 "Code Control Module".

- Input Control Module coding "00002".

- Press -> button.

- Press buttons 06 to select function 06 "End Output" and press Q button to confirm input.

- Remove 1551 Scan Tool.

- Start engine, check for fuel leaks.

- Road test vehicle for approx. 6 miles (10 Km) under load.

When procedure applies to vehicles within warranty use the following:

Part Identifier: 2300
Labor Operation: 2300716 100 TU