2019 Volkswagen Jetta GLI Technical Service Bulletin #1512-01 Date: 120701

Engine - Rattle Noise After Start, No Start, MIL ON

15 12 01

July 23, 2012

2028302 *Supersedes T.B. V151104 dated December 22, 2011 to remove European exhaust warning light reference in text and add additional

model year applicability. *

Vehicle Information

Condition

Engine Rattling Noises after Start, Engine Doesn't Start, Timing Chain Slipped

Customer may state:

^ Rattling noises after engine start from front of the vehicle or engine compartment.

^ Engine does not start.

*^ MIL ON*

The following entries are logged in the engine control module (ECM):

Technical Background

Timing chain tension may be incorrect due to tensioner.

As a result, the timing chain can skip and causing contact between the pistons and valves.

Production Solution

Service

If timing chain is suspect, perform the following:

^ Complete the DTC entries according to guided fault finding (GFF).

^ Remove the lower timing chain cover, see Repair Manual Group 15 in ElsaWeb.

2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 25

^ Check the timing chain tensioner as follows:

^ Compress the tensioning rail of the timing chain (illustration 1, No. 2) by hand against the timing chain tensioner (Figure 1, No. 1).

If the piston of the timing chain tensioner cannot be compressed by hand after several attempts (Figure 3, green arrow), further engine diagnosis is

required.

Tip:

Inspect intake camshaft and camshaft bearing for damage.

If the piston of the timing chain tensioner can be compressed in by hand (Figure 2, red arrow) the timing chain tensioner has failed, and further

engine diagnosis may be required.

Tip:

If engine noises or no start condition remain, inspect pistons and valves for contact damage. If engine damage is noted, cylinder head or engine may

need to be replaced.

Warranty

Information only.

Required Parts and Tools

No Special Parts required.

No Special Tools required.

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal.

Always check with your Parts Dept. and Repair Manuals for the latest information.

2019 Volkswagen Jetta GLI Technical Service Bulletin #2012-02 Date: 121121

Fuel System - Engine Crank/No Start, MIL ON, DTC P0087 Set

20 12 02

November 21, 2012

2031426

Vehicle Information

Condition

High Pressure Fuel Pump Diagnosis

Engine Crank, No Start after Long Periods without Driving. Engine may run rough, and or MIL-ON with DTC P0087-low fuel pressure stored in

ECM Fault Memory.

Technical Background

Completing the GFF high pressure pump function test is essential to diagnose proper pump operation and to avoid unnecessary replacements.

Production Solution

N/A

Service

Guided fault finding provides a function test for the high pressure fuel pump. This test must be performed in order to properly diagnose the high

pressure fuel pump.

Note:

A completed high pressure fuel pump function test is required for reimbursement.

Following completion of the function test:

If the fuel rail pressure is within +/- 1 of 40 bar (480 psi.), DO NOT replace the high pressure fuel pump. Continue to further diagnose the fuel

system.

^ With the engine running, check measure value blocks 106, 140 and 141 to confirm fuel rail pressure reads a minimum of 40 bar (480 psi).

The engine should be switched OFF and the key switched ON to perform the following procedure:

^ Enter vehicle self-diagnosis.

^ Select OBD.

^ Select 01 engine electronics.

^ Select 005 - output diagnostic test mode (DTM).

^ VAS will run diagnostics.

^ When the test starts to check operation of the "fuel pressure regulator 2 control circuit high" (figure 1), listen for an audible "click" sound

coming from the N276 pressure regulator.

2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 2

Tip:

The audible "click" sound may be better heard with hood open and the engine cover removed.

^ If "click" noise is heard, DO NOT replace the high pressure fuel pump, this bulletin will not apply. Continue to further diagnose the fuel system.

^ If "click" noise is not heard, replace the high pressure fuel pump.

^ Following completion of the test procedure, the vehicle should be driven with higher RPMs (3000 - 5500) to confirm the fault does not return.

2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 3

Warranty

2019 Volkswagen Jetta GLI(1K2) L4-2.0L Turbo (CCTA) Volkswagen JETTA Page 4

Required Parts and Tools

Additional Information

All part and service references provided in this Technical Bulletin are subject to change and/or removal.

Always check with your Parts Dept. and Repair Manuals for the latest information.