Heating, Ventilation Air Conditioning: Diagnosis Volkswagen Passat B5 рестайлинг

Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 or Scan Tool VAG 1551 , connecting

All functions previously performed with the Scan Tool VAG 1551 or Scan Tool VAG 1551 can also be performed using the Vehicle Diagnostic Testing and Information System VAS 5051 using modes "Vehicle Self-diagnosis" and "Guided Fault Finding". Operating instructions for VAS 5051 tester.

Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 , connecting

Test requirements

1. All fuses OK according to wiring diagram.
2. Battery voltage must be at least 11.5 volts.

Scheme 9

1. Connect Diagnostic Wire VAS 5051/1 or VAS 5051/3 to Data Link Connector (DLC)
2. Switch on ignition.

Select operating mode, vehicle system and function

1. Press "Vehicle Self-Diagnosis" selection on display.
2. Select the vehicle system to be tested on display (touch screen).
3. Select the desired function on display.

Display will indicate the control module identification and the coding.

Display will indicate all relevant diagnostic functions.

Note. Display fields in functions 04 (Basic setting) and 08 (Read Measuring Value Block) are listed from top to bottom. The following test sequences are described for the Scan Tool VAG 1551.

Scan Tool VAG 1551 , connecting

Test requirements

1. All fuses OK according to wiring diagram.
2. Battery voltage must be at least 11.5 volts.

Scheme 10

1. Connect Scan Tool VAG 1551 with Adapter Cable VAG 1551/3B to Data Link Connector (DLC).

Note. If nothing is indicated on display, check voltage supply for Scan Tool VAG 1551 according to wiring diagram. --> Electrical Wiring Diagrams, Troubleshooting and Component Locations Depending on the program, additional operating information can be printed out by pressing the HELP button of the Scan Tool VAG 1551. Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer". This automatically checks all control modules installed in the vehicle. The --> button is used for advancing through the program sequence. The PRINT button is used for switching on the printer (lamp in button lights up).

Indicated on display * (See )

*Operating modes 1 and 2 are displayed alternately

1. Press button 1 for "Rapid data transfer".
2. Continue On Board Diagnostic (OBD) of vehicle system to be tested as described under performing On Board Diagnostic (OBD) --> table of contents.

On Board Diagnostic (OBD), initiating checking control module versions

Note. The following information applies to Passat with Climatronic models through 11.01 production only. OBD program functions on vehicles from 12.01 production must be performed using the Vehicle Diagnostic Testing and Information System VAS 5051 in mode "Guided Fault Finding".

Test requirements

1. All fuses OK according to wiring diagram
2. Voltage supply OK (at least 11.5 V).
3. Scan Tool VAG 1551 or VAG 1552 connected.

Note. Connecting Scan Tool --> Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 or Scan Tool VAG 1551 , connecting . The following description applies only to Scan Tool VAG 1551.

Switch on ignition.

Switch on printer with the PRINT button (indicator lamp in button lights up).

Press button 1 to select operating mode 1, "Rapid data transfer".

Indicated on display

1. Press buttons 0 and 8 to select AC/Heating Electronics address word 08.

Indicated on display

1. Press Q button to confirm input.

Shown in display after inputting address word 08

Indicated on display

The Climatronic Control Module J255 part number is displayed, e.g.

1. Vehicles through 09.00

Green (illumination) display 1J1 907 044 A (repl. by 1U1 907 044 A)

Blue (illumination) display 3B1 907 044 A

Blue (illumination) display 3B1 907 044 C

1. Vehicles 10.00 through 11.01

Blue (illumination) display 3B1 907 044 H

Blue (illumination) display 3B1 907 044 J

1. Climatronic = System designation
2. VXX = Software version
3. Coding --> «Climatronic Control Module J255 , coding (function 07)»(ref-255355-S02682105982007053000000)
4. WSC = Workshop code

If indicated coding differs from vehicle version, then

Check control module coding --> Climatronic Control Module J255 , coding (function 07) ; Climatronic control module, coding (function 07).

Note. If one of the messages opposite appears in the display, the possible causes of the malfunction can be printed out with the HELP button.

1. Ignition must be switched on!

1. Malfunctions have occurred at the start of or during the program (external sources of malfunctions?).

1. Check Data Link Connector (DLC) cables, voltage and ground supply connections.

1. When causes of malfunctions have been eliminated, input address word 08 for "AC/Heating electronics" and confirm entry with Q button.

Shown in display after input of address word 08

The control module identification number is displayed

1. Press --> button.

Indicated in display (select function, e.g.: 02 - check Diagnostic Trouble Code (DTC) memory)

Note. A list of the possible functions is printed out after pressing the HELP button

Indicated on display (select function, e.g.: 02 - check Diagnostic Trouble Code (DTC) memory)

Diagnostic Trouble Code (DTC) Memory, checking (function 02)

Note. The following information applies to Passat with Climatronic models through 11.01 production only. OBD program functions on vehicles from 12.01 production must be performed using the Vehicle Diagnostic Testing and Information System VAS 5051 in mode "Guided Fault Finding".

1. Connect Scan Tool VAG 1551 , input address word 08, "AC/ Heating electronics" and press --> until "Select function XX" appears in display.

Indicated on display (function selection).

1. Press buttons 0 and 2 to select function 02, "check DTC memory".

Indicated on display

1. Press Q button to confirm input.

The number of stored DTCs or "No DTCs recognized" appears in the display.

1. Press --> button. Stored DTCs are displayed one after the other and printed out using Print button.
2. When the last DTC has been displayed and printed out, rectify malfunctions as described in DTC table --> «Diagnostic Trouble Code (DTC) table»(ref-255355-S22303384272007053000000) : After the --> button is pressed, the program moves to the initial position as with "No DTCs recognized"

Indicated on display (select function)

1. End output (function 06) --> «End Output (function 06)»(ref-255355-S13522750942007053000000) .
2. Switch off ignition and disconnect Data Link Connector (DLC).

Note. If DTCs were recognized, follow the sequence below: 1. Rectify malfunction. 2. Erase Diagnostic Trouble Code (DTC) memory (function 05). 3. Check Diagnostic Trouble Code (DTC) memory (function 02).

Diagnostic Trouble Code (DTC) table

1. The following table lists all malfunctions, with the corresponding 5 digit code numbers, that can be recognized by Climatronic Control Module J255 and printed out by the Scan Tool VAG 1551.
2. If malfunctions do not occur regularly, these are displayed as occurring sporadically ( "SP" ).
3. DTC codes appear only on print-out.
4. DTC table may also include a description of the type of malfunction.

1. When a repair has been carried out, the Diagnostic Trouble Code (DTC) memory must always be erased and checked again with the Scan Tool VAG 1551.
2. If there is a specific complaint and no malfunctions are recognized after checking the Diagnostic Trouble Code (DTC) memory, carry out function 03, "Output Diagnostic Test Mode (DTM)" --> «Output Diagnostic Test Mode (DTM), (function 03)»(ref-255355-S20694173402007053000000) or function 08, "Read measuring value block" --> «Read Measuring Value Block (function 08)»(ref-255355-S13062707522007053000000) . If the display flashes but no DTCs were recognized, carry out function "Coding control module 07" and then function 04, "Basic setting". If necessary, check refrigerant system --> «A/C Refrigerant System Servicing»(ref-255355-S31794454622007053000000) .

* A malfunction has been found with Speedometer Vehicle Speed Sensor (VSS) G22 and not with Vehicle Speed Sensor (VSS) G68. The malfunction is only recognized if 5 driving cycles (start, speed over 15 km/h (approximately 9.5 mph), and switch off take place within 4 minutes after starting engine and no speed signal is measured.

* One of these messages will be displayed in addition to indication of relevant component.

* One of these messages will be displayed in addition to indication of relevant component.

* These malfunctions are recognized in Basic setting 04, Output Diagnostic Test Mode (DTM) and in normal operation. Flap must reach both end stops.

* One of these read-outs is displayed in addition to relevant component.

* One of these read-outs is displayed in addition to relevant component.

* One of these messages will be displayed in addition to indication of relevant component.

* This malfunction cannot be recognized if ambient temperature is below 12 ° C or 54 ° F, or if Outside Air Temperature Sensor G17 and Fresh Air Intake Duct Temperature Sensor G89 malfunction. The switch is a three-part switch, the 2 and 32 bar switch component is tested, the 16 bar switch component is not.

* One of these messages will be displayed in addition to indication of relevant component.

* One of these read-outs is displayed in addition to relevant component.

Note. Receipt of above information is visible using function 08, read measuring value block, display group 013 --> Read Measuring Value Block (function 08)

* One of these messages will be displayed in addition to indication of relevant component.

* The "Ignition time period signal off" comes from the Instrument Cluster Control Module J285. After switching off and restarting the engine (within 2 hours of switching engine off), the Climatronic Control Module J255 uses this signal to substitute the current Outside Air Temperature Sensor G17 and Fresh Air Intake Duct Temperature Sensor G89 values with the operating temperature values at time of shut off. Actual measured values (after two hours) from these sensors will otherwise be affected by heat radiated from the engine. The ignition time period off signal occurs only after starting.

* This malfunction is recognized in basic setting 04, Output Diagnostic Test Mode (DTM) 03 and in normal operation. Flap motor must reach both end stops.

* This malfunction is recognized in basic setting 04, Output Diagnostic Test Mode (DTM) 03 and in normal operation. Flap motor must reach both end stops.

* This malfunction is recognized in Basic setting 04, Output Diagnostic Test Mode (DTM) 03 and in normal operation. Flap motor must reach both end stops.

* One of these read-outs is displayed in addition to relevant component.

* One of these read-outs is displayed in addition to relevant component.

Output Diagnostic Test Mode (DTM), (function 03)

Note. The following information applies to Passat with Climatronic models through 11.01 production only. OBD program functions on vehicles from 12.01 production must be performed using the Vehicle Diagnostic Testing and Information System VAS 5051 in mode "Guided Fault Finding". Output Diagnostic Test Mode (DTM) must be carried out with engine not running, ignition switched on, and Climatronic switched off.

1. Switch Climatronic off by pressing and holding "decrease blower speed" button until OFF' appears in display

1. For definitive results, Output Diagnostic Test Mode (DTM) must be carried out at an ambient temperature of at least 12 ° C (54 ° F) as displayed on A/C control head.
2. Automatic regulation of Climatronic does not take place during Output Diagnostic Test Mode (DTM).
3. If necessary, Output Diagnostic Test Mode (DTM) can be repeated several times.

Output Diagnostic Test Mode (DTM), initiating

1. Connect Scan Tool VAG 1551 and input address word "08 AC/Heating electronics" and then press --> button, until "Select function XX" is shown in display.

Indicated on display (select function)

1. Press buttons 0 and 3 to select "Output Diagnostic Test Mode (DTM)".

Indicated on display

1. Confirm input with Q button.

Indicated on display

The following tests are carried out

1. A/C Control Head E87 display «Check A/C Control Head E87 Display»(ref-255355-S21324536482007101900000)
2. Functional test of the 4 air flap motors
3. Electrical circuit to Fresh Air Blower V2 is tested.

Vehicles 10.00 -->

1. First speed coolant fan is activated.

Continued for all vehicles

1. Climatronic Control Module J255 switching sequence for A/C Clutch N25 is tested.
2. All sensors are checked.

After approx. 30 seconds the checks are completed

Indicated on display

1. If "Function is not recognized or cannot be carried out at the moment" appears in display, Output Diagnostic Test Mode (DTM) has been concluded.
2. Press --> button.

Note. After completing Output Diagnostic Test Mode (DTM), Check Diagnostic Trouble Code (DTC) memory --> Diagnostic Trouble Code (DTC) Memory, checking (function 02)

Scheme 11

All display segments must show

Note. All display segments must appear during Output Diagnostic Test Mode (DTM) function 03, otherwise replace Climatronic Control Module J255.

DTC memory, erasing

Press --> button.

Indicated on display

1. Press buttons 0 and 5 to select function "Erase Diagnostic Trouble Code (DTC) memory".

Indicated on display

Press Q button to confirm input.

Indicated on display

Press --> button.

On Board Diagnostic (OBD) through 11.01

The Climatronic Control Module J255 is controlled by an internal microprocessor with On Board Diagnostic (OBD) capability. If malfunctions, short or open circuits occur on monitored components, Diagnostic Trouble Codes (DTC) are stored in memory.

Specific information and procedures --> Climatronic through 11.01 - On Board Diagnostic (OBD) .

On Board Diagnostic (OBD) from 12.01

The Climatronic Control Module J255 is controlled by an internal microprocessor with On Board Diagnostic (OBD) capability. If malfunctions, short or open circuits occur on monitored components, Diagnostic Trouble Codes (DTC) are stored in memory.

OBD program functions on vehicles from 12.01 production must be performed using the Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 in mode "Guided Fault Finding".

Components, checking and adjusting with Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052

1. Connect Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 to vehicle Data Link Connector (DLC) --> «Vehicle Diagnostic Testing and Information System VAS 5051 or VAS 5052 or Scan Tool VAG 1551 , connecting»(ref-255355-S22215637142007053000000) , select mode "Guided Fault Finding"
2. Enter appropriate model, equipment and model year information and press ">" to confirm.

After all control modules have been registered and DTC memories checked

1. Press "Go to"
2. Select "Function/Component Selection"
3. Select "Body, (Repair Gr. 01, 27, 50 to 87)"
4. Select "Heating, ventilation, air conditioning (Repair Gr. 01, 80 to 87"

1. Select "Systems capable of self-diagnosis"
2. Select "Climatronic"
3. Select "Functions"

Review displayed listing, choose and press ">" to confirm.

1. "Basic settings"
2. Coding Control module for climatronic
3. "Check cooling performance".

1. Follow tester prompts.

A/C refrigerant system, testing with pressure gauges

Due to the constant temperature/pressure relationship of refrigerant R-134a, approximate high-side system temperature can be determined based on system pressure.

Pressure gauges may have one or more temperature scales in addition to the pressure scale. Since various refrigerants have different temperature/pressure relationships, each gauge is specific for a particular refrigerant.

A/C Refrigerant System Troubleshooting

Note. The following procedures apply to vehicles without externally regulated compressor Denso 7SEU16 Compressor/engine applications --> Compressor/engine applications

Test conditions

1. A/C refrigerant system fully charged; discharge, evacuate and recharge system if necessary
2. Condenser and radiator clean and free of obstructions (spray clean if necessary)
3. Air distribution can be adjusted correctly using control knobs (all air distribution flaps reach end positions)
4. Wiring OK per wiring diagram

1. Outside (ambient) air temperature between 20-30 ° C (68-86 ° F)
2. Drive belts for A/C compressor and Generator in good condition and properly tensioned

Test 1: Air temperature drop from center instrument panel outlet, checking (A/C system cooling performance)

1. Start engine.
2. Set temperature control to maximum "cold" (if Manual A/C) or "LO" (if Climatronic).
3. Manual A/C: press "A/C" button and select second blower speed.
4. Climatronic: Select minimum blower speed (manual override) by pressing "decrease blower speed" button (observe front "blower speed" display in control head).

1. Adjust air distribution to instrument panel outlets.
2. Insert thermometer into center instrument panel outlet and raise engine speed to approximately 1500 RPM.

Specified result

With humidity normal and outside (ambient) temperature between 20-25 ° C (68-77 ° F), system is cooling satisfactorily if air temperature from center instrument panel vent drops below 10 ° C (50 ° F) within 1 minute.

For higher ambient temperatures and/or higher humidity, specified air temperature from center instrument panel vent can be slightly higher.

If specified reading is not obtained, perform tests 2 and 3, then compare results of all three tests --> table, SYSTEM PRESSURE TESTING .

Test 2: A/C system high pressure, checking

1. Connect high- and low-pressure hoses of refrigerant recovery/ recycling/recharging unit Kent-Moore ACR 4 or equivalent, to high- and low-pressure service valves.
2. Disconnect electrical connector from coolant fan.
3. Start engine.
4. Set temperature control to maximum "hot" (if Manual A/C) or "HI" (if Climatronic).

1. Manual A/C: press "A/C" button and select highest blower speed.
2. Adjust air distribution to footwell outlets.
3. Raise engine speed to approximately 1500 RPM.

Specified result

System high pressure is normal if high-pressure gauge reads 232 psi (16 bar) within 30 seconds.

If specified reading is not obtained, also perform test 3 and compare results of all three tests --> table, SYSTEM PRESSURE TESTING .

Test 3: A/C system low pressure, checking

1. Connect high- and low-pressure hoses of refrigerant recovery/recycling/recharging unit Kent-Moore ACR 4 , or equivalent, to high- and low-pressure service valves.
2. Start engine.
3. Set temperature control to maximum "cold" (if Manual A/C) or "LO" (if Climatronic).
4. Manual A/C: press "A/C" button and select first blower speed.

1. Climatronic: Reduce blower speed to lowest setting (manual override) by pressing "decrease blower speed" button (observe front "blower speed" display in control head).
2. Adjust air distribution to instrument panel outlets.
3. Raise engine speed to 1500 RPM.

Specified result

System low pressure is normal if low-pressure gauge reads 22-36 psi (1.5-2.5 bar) within 30 seconds.

If specified reading is not obtained, compare results of all three tests --> table, SYSTEM PRESSURE TESTING .

A/C Refrigerant System Pressures (Test)

SYSTEM PRESSURE TESTING

1) Normal air outlet temperature approx. 6 ° C (43 ° F). For higher ambient temperatures and/or higher humidity, specified air temperature from center instrument panel vent can be slightly higher. 2) Additional information --> A/C refrigerant system pressures and temperatures, checking .

1. A/C refrigerant system fully charged
2. A/C Clutch N25 and compressor function OK
3. Condenser and radiator clean and free of obstructions
4. Air distribution can be adjusted properly

1. Wiring OK as per wiring diagram
2. Outside (ambient) temperature 20 ° C to 30 ° C (68 ° F to 86 ° F)