Engine Control Module, Replacing (GROUP 24, NO. 94-03)

WARNING: This page is about the Jetta III GL, 2.0 A, Automatic, 01M, which is a different variant/trim than selected.

Publication date: 1994-01-31
Reference number: GROUP 24, NO. 94-03

ENGINE CONTROL MODULE, REPLACING

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 24, NO. 94-03, Date of Issue: January 31, 1994

REPLACING ENGINE CONTROL MODULE

Model(s): 1993-94 Volkswagon Golf III & Jetta III (Up To VIN RM 045 558)

Group: 24 - Multiport Fuel injection

Bulletin No.: 94-03

Date: January 31, 1994

CONDITION

If the ECM in a 1993 model year or early 1994 model year vehicle (2.0 Liter engine only) requires replacement, use Electronic Control Module Part No. 037 906 258 AA.

This ECM is a universal part that is correct for all 50 US States and Canada vehicles with manual or automatic transmission.

NOTE: When the replacement ECM is installed in vehicles with an automatic transmission, the idle speed will be reduced to 670 rpm when in a forward drive gear.

SERVICE

Perform the following modification when installing the ECM, Part No. 037 906 258 AA in a California Emission Vehicle (check Emissions Compliance label on vehicle).

If the original ECM was Part No. 037 906 258 F or 037 906 258 G, a wire from pin number 10 of the ECM connector (T68/10) to Ground must be added. The added wire is required to activate the EGR system.

If the original ECM was Part No. 037 906 258 T, the wire already exists and no modification is necessary.

- Prepare one 18 gauge wire, 12 inches long, using terminals and grommet. See Fig 1 .

- Connect wire to pin 10 of ECM connector (T68/10), install grommet and attach the remaining end of the wire to the ECM bracket mounting stud. See Fig 2 .

- Secure wire to harness with a tie-wrap.

CAUTION: Part Numbers are for reference only. Always check with your Parts Department for the latest information.

Fig 1: Ground Wire Assembly

Fig 2: Mounting Stud Location