P2104

Factory Manual References

Factory service manual diagnostic procedure for 2005 audi s4

94 Light Sensor Warning Light On Intermittently DTC 02104 (GROUP 94, NO. 12-71)

Publication date: 2012-03-19
Reference number: GROUP 94, NO. 12-71
Supersedes refnos: 2010214, GROUP 68, NO. 08-08, GROUP 94, NO. 04-02, GROUP 94, NO. 05-01, GROUP 94, NO. 05-06

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 94, NO. 12-71 (2010214/7), Date of Issue:  March 19, 2012
AUDI: Cabriolet 2004, 2005; A4/S4 2004, 2005
GROUP: 94 - Lights - Exterior
Superceded Bulletin(s): GROUP 68, NO. 08-08, Date of Issue:  November 5, 2008

Service Information

94 12 71 2010214/7 March 19, 2012. Supersedes Technical Service Bulletin Group 68 number 08 - 08 dated November 5, 2008 for reasons listed below.

Model(s) Year VIN Range Vehicle-Specific Equipment
Cabriolet 2004 000001 - 999999 Automatic Exterior Headlights
2005 000001 - 010562
000001 - 901404
A4/S4 2004 000001 - 999999
2005 000001 - 085293

Condition

REVISION HISTORY
Revision Date Purpose
7 - Revised header data (Changed title)
Revised Service 
Revised Warranty 
6 11/5/2008 Revised Title to include Repair Group

Technical Background

Light Sensor Warning Light ON Intermittently

Customer concern: Automatic headlight instrument cluster warning light illuminating for 1 second accompanied with a short beep.

Condition: Only occurs when headlight switch is in AUTO position.

DTC "P2104/29 - G399 short to ground sporadic" is usually stored in vehicle electrical system control module -J519-.

G07982654

Tip:  The above DTC may be erased if the fault code does not occur again within 40 driving cycles.

MODELS AFFECTED

Model Up to VIN:
A4/S4 8E_5A085293
Cabriolet 8H_5K010562
S4 Cabriolet 8H_5K901404

This TSB applies ONLY to the above vehicles equipped with automatic headlights. These vehicles will be equipped with rear view mirror part number 8E0 857 511 B+  (color code) which has an integral light sensor.

Production Solution

Not applicable.

Service

Check for above DTC as follows:

  1. Connect VAS Scantool.
  2. From start-up screen select: Vehicle Self-Diagnosis>> 09 - electronic central electrics>> 02 - Interrogate fault memory  .

If DTC "P2104/29 - G399 - short to ground sporadic" is stored in memory: 

  1. Replace interior rear view mirror (Part number. 8E0 857 511 B*).

    See Repair Manual, Group 68, Interior Equipment, Interior rear view mirror, removing (automatic day/night mirror, interior rear view mirror with compass  .

    (*) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59- Light Platinum (A4); F77 - Light Aqua (A4); 1RS- Twist (A4).

  2. Erase DTC using "05 - Erase fault memory".
  3. Proceed to Checking Automatic Headlight Operation  below.

If DTC "P2104/29 - G399 short to ground sporadic" is not stored in memory: 

  1. Remove interior rear view mirror.
    G07982655

If Supplier part number is 905-0617, 905-0702, 905-0704, or 905-0706. 

  1. Replace interior rear view mirror.
  2. Proceed to "Check Operation of Automatic Headlights".

If Supplier part number is 905-1028, 905-1029, 905-1030, or 905-1031: 

  1. Further diagnosis of automatic headlight system is necessary. Do not complete this TSB.

Checking Automatic Headlight Operation

  1. Place headlight switch in "AUTO" position.
    G07982656

    Tip:  Mirror should be in the installed position before performing the next step.

    G07982657
  2. Place flashlight on windshield over light sensor. (Figure 5)
    G07982658
  3. Headlights should turn OFF in 15 seconds.

    If headlights do not turn OFF in 15 seconds:

    • Further diagnosis of automatic headlight system is necessary.

      If headlights turn OFF in 15 seconds: System is operating properly.

    • Calibrate compass by driving slowly in a circle 1-2 times.

Warranty

Claim Type:  Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin is informational only.
Service Number:  9415
Damage Code:  0039
Labor Operations:  Technical diagnosis 0132 0021 20 TU
Replacing and calibrating interior mirror 6827 1900 20 TU
Diagnostic Time:  GFF No allowance 0 TU
Road test prior to service procedure No allowance 0 TU
Road test after service procedure No allowance 0 TU
Technical diagnosis at dealer's discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:  As per TSB #2010214/7

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual.  Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools

Part Number Part Description Quantity
8E0 857 511 B(1) Interior Rear View Mirror 1
(1) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59 - Light Platinum (A4); F77 - Light Aqua (A4); 1RS - Twist (A4).

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.

94 Light Sensor Warning Light On Intermittently DTC 02104 (GROUP 94, NO. 12-71)

Publication date: 2012-03-19
Reference number: GROUP 94, NO. 12-71
Supersedes refnos: 2010214, GROUP 68, NO. 08-08, GROUP 94, NO. 04-02, GROUP 94, NO. 05-01, GROUP 94, NO. 05-06

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 94, NO. 12-71 (2010214/7), Date of Issue:  March 19, 2012
AUDI: Cabriolet 2004, 2005; A4/S4 2004, 2005
GROUP: 94 - Lights - Exterior
Superceded Bulletin(s): GROUP 68, NO. 08-08, Date of Issue:  November 5, 2008

Service Information

94 12 71 2010214/7 March 19, 2012. Supersedes Technical Service Bulletin Group 68 number 08 - 08 dated November 5, 2008 for reasons listed below.

Model(s) Year VIN Range Vehicle-Specific Equipment
Cabriolet 2004 000001 - 999999 Automatic Exterior Headlights
2005 000001 - 010562
000001 - 901404
A4/S4 2004 000001 - 999999
2005 000001 - 085293

Condition

REVISION HISTORY
Revision Date Purpose
7 - Revised header data (Changed title)
Revised Service 
Revised Warranty 
6 11/5/2008 Revised Title to include Repair Group

Technical Background

Light Sensor Warning Light ON Intermittently

Customer concern: Automatic headlight instrument cluster warning light illuminating for 1 second accompanied with a short beep.

Condition: Only occurs when headlight switch is in AUTO position.

DTC "P2104/29 - G399 short to ground sporadic" is usually stored in vehicle electrical system control module -J519-.

G07982654

Tip:  The above DTC may be erased if the fault code does not occur again within 40 driving cycles.

MODELS AFFECTED

Model Up to VIN:
A4/S4 8E_5A085293
Cabriolet 8H_5K010562
S4 Cabriolet 8H_5K901404

This TSB applies ONLY to the above vehicles equipped with automatic headlights. These vehicles will be equipped with rear view mirror part number 8E0 857 511 B+  (color code) which has an integral light sensor.

Production Solution

Not applicable.

Service

Check for above DTC as follows:

  1. Connect VAS Scantool.
  2. From start-up screen select: Vehicle Self-Diagnosis>> 09 - electronic central electrics>> 02 - Interrogate fault memory  .

If DTC "P2104/29 - G399 - short to ground sporadic" is stored in memory: 

  1. Replace interior rear view mirror (Part number. 8E0 857 511 B*).

    See Repair Manual, Group 68, Interior Equipment, Interior rear view mirror, removing (automatic day/night mirror, interior rear view mirror with compass  .

    (*) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59- Light Platinum (A4); F77 - Light Aqua (A4); 1RS- Twist (A4).

  2. Erase DTC using "05 - Erase fault memory".
  3. Proceed to Checking Automatic Headlight Operation  below.

If DTC "P2104/29 - G399 short to ground sporadic" is not stored in memory: 

  1. Remove interior rear view mirror.
    G07982655

If Supplier part number is 905-0617, 905-0702, 905-0704, or 905-0706. 

  1. Replace interior rear view mirror.
  2. Proceed to "Check Operation of Automatic Headlights".

If Supplier part number is 905-1028, 905-1029, 905-1030, or 905-1031: 

  1. Further diagnosis of automatic headlight system is necessary. Do not complete this TSB.

Checking Automatic Headlight Operation

  1. Place headlight switch in "AUTO" position.
    G07982656

    Tip:  Mirror should be in the installed position before performing the next step.

    G07982657
  2. Place flashlight on windshield over light sensor. (Figure 5)
    G07982658
  3. Headlights should turn OFF in 15 seconds.

    If headlights do not turn OFF in 15 seconds:

    • Further diagnosis of automatic headlight system is necessary.

      If headlights turn OFF in 15 seconds: System is operating properly.

    • Calibrate compass by driving slowly in a circle 1-2 times.

Warranty

Claim Type:  Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin is informational only.
Service Number:  9415
Damage Code:  0039
Labor Operations:  Technical diagnosis 0132 0021 20 TU
Replacing and calibrating interior mirror 6827 1900 20 TU
Diagnostic Time:  GFF No allowance 0 TU
Road test prior to service procedure No allowance 0 TU
Road test after service procedure No allowance 0 TU
Technical diagnosis at dealer's discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:  As per TSB #2010214/7

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual.  Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools

Part Number Part Description Quantity
8E0 857 511 B(1) Interior Rear View Mirror 1
(1) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59 - Light Platinum (A4); F77 - Light Aqua (A4); 1RS - Twist (A4).

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.

94 Light Sensor Warning Light On Intermittently DTC 02104 (GROUP 94, NO. 12-71)

Publication date: 2012-03-19
Reference number: GROUP 94, NO. 12-71
Supersedes refnos: 2010214, GROUP 68, NO. 08-08, GROUP 94, NO. 04-02, GROUP 94, NO. 05-01, GROUP 94, NO. 05-06

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

94 LIGHT SENSOR WARNING LIGHT ON INTERMITTENTLY DTC 02104

TECHNICAL SERVICE BULLETIN

Reference Number(s): GROUP 94, NO. 12-71 (2010214/7), Date of Issue:  March 19, 2012
AUDI: Cabriolet 2004, 2005; A4/S4 2004, 2005
GROUP: 94 - Lights - Exterior
Superceded Bulletin(s): GROUP 68, NO. 08-08, Date of Issue:  November 5, 2008

Service Information

94 12 71 2010214/7 March 19, 2012. Supersedes Technical Service Bulletin Group 68 number 08 - 08 dated November 5, 2008 for reasons listed below.

Model(s) Year VIN Range Vehicle-Specific Equipment
Cabriolet 2004 000001 - 999999 Automatic Exterior Headlights
2005 000001 - 010562
000001 - 901404
A4/S4 2004 000001 - 999999
2005 000001 - 085293

Condition

REVISION HISTORY
Revision Date Purpose
7 - Revised header data (Changed title)
Revised Service 
Revised Warranty 
6 11/5/2008 Revised Title to include Repair Group

Technical Background

Light Sensor Warning Light ON Intermittently

Customer concern: Automatic headlight instrument cluster warning light illuminating for 1 second accompanied with a short beep.

Condition: Only occurs when headlight switch is in AUTO position.

DTC "P2104/29 - G399 short to ground sporadic" is usually stored in vehicle electrical system control module -J519-.

G07982654

Tip:  The above DTC may be erased if the fault code does not occur again within 40 driving cycles.

MODELS AFFECTED

Model Up to VIN:
A4/S4 8E_5A085293
Cabriolet 8H_5K010562
S4 Cabriolet 8H_5K901404

This TSB applies ONLY to the above vehicles equipped with automatic headlights. These vehicles will be equipped with rear view mirror part number 8E0 857 511 B+  (color code) which has an integral light sensor.

Production Solution

Not applicable.

Service

Check for above DTC as follows:

  1. Connect VAS Scantool.
  2. From start-up screen select: Vehicle Self-Diagnosis>> 09 - electronic central electrics>> 02 - Interrogate fault memory  .

If DTC "P2104/29 - G399 - short to ground sporadic" is stored in memory: 

  1. Replace interior rear view mirror (Part number. 8E0 857 511 B*).

    See Repair Manual, Group 68, Interior Equipment, Interior rear view mirror, removing (automatic day/night mirror, interior rear view mirror with compass  .

    (*) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59- Light Platinum (A4); F77 - Light Aqua (A4); 1RS- Twist (A4).

  2. Erase DTC using "05 - Erase fault memory".
  3. Proceed to Checking Automatic Headlight Operation  below.

If DTC "P2104/29 - G399 short to ground sporadic" is not stored in memory: 

  1. Remove interior rear view mirror.
    G07982655

If Supplier part number is 905-0617, 905-0702, 905-0704, or 905-0706. 

  1. Replace interior rear view mirror.
  2. Proceed to "Check Operation of Automatic Headlights".

If Supplier part number is 905-1028, 905-1029, 905-1030, or 905-1031: 

  1. Further diagnosis of automatic headlight system is necessary. Do not complete this TSB.

Checking Automatic Headlight Operation

  1. Place headlight switch in "AUTO" position.
    G07982656

    Tip:  Mirror should be in the installed position before performing the next step.

    G07982657
  2. Place flashlight on windshield over light sensor. (Figure 5)
    G07982658
  3. Headlights should turn OFF in 15 seconds.

    If headlights do not turn OFF in 15 seconds:

    • Further diagnosis of automatic headlight system is necessary.

      If headlights turn OFF in 15 seconds: System is operating properly.

    • Calibrate compass by driving slowly in a circle 1-2 times.

Warranty

Claim Type:  Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin is informational only.
Service Number:  9415
Damage Code:  0039
Labor Operations:  Technical diagnosis 0132 0021 20 TU
Replacing and calibrating interior mirror 6827 1900 20 TU
Diagnostic Time:  GFF No allowance 0 TU
Road test prior to service procedure No allowance 0 TU
Road test after service procedure No allowance 0 TU
Technical diagnosis at dealer's discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:  As per TSB #2010214/7

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual.  Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools

Part Number Part Description Quantity
8E0 857 511 B(1) Interior Rear View Mirror 1
(1) Add color code: 4PK - Soul Black (A4, A4 Cabriolet); E59 - Light Platinum (A4); F77 - Light Aqua (A4); 1RS - Twist (A4).

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.

Supporting Diagrams & Locations

Reference material from the factory manual for this diagnostic procedure.

Diagram

4.2L

Diagram

4.2L

Diagram

4-Way Relay Carrier In E-Box In Plenum Chamber, Removing and Installing

Diagram

4-Way Relay Carrier, Removing and Installing

Diagram

9-Way Relay Carrier, Removing and Installing

Diagram

A/C - Does Not Cool Sufficiently

Location

1.8L (Engine Code: AMB)

Location

2.0L (Engine Codes: BGP, BWT)

Location

2.7L (2002 S4 - Engine Code: APB)

Location

3.0L (Engine Codes: AVK, BGN)

Fuse/Relay

4-Way Relay Carrier In E-Box In Plenum Chamber, Removing and Installing

Fuse/Relay

4-Way Relay Carrier, Removing and Installing

Fuse/Relay

9-Way Relay Carrier, Removing and Installing

Fuse/Relay

3-Position Relay Carrier, Removing and Installing

Related Procedures

Procedure

A/C Pressure Switch F129

Procedure

A/C Refrigerant High Pressure Switch F118

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