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Home/Porsche/Cayenne/Porsche Cayenne I (2002-2007)/Repair manual/Automatic HVAC System/Air Conditioning - Diagnostics: Diagnosis
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Air Conditioning - Diagnostics: Diagnosis Porsche Cayenne I

Automatic HVAC System 5 illustrations ~3125 words

Troubleshooting procedure

Specific troubleshooting can only be performed in accordance with instructions (given under Diagnosis/troubleshooting for each fault code) if the entry has the status 'present' in the fault memory.

If the fault is currently 'not present', please check the following

  1. Diagnostic conditions are met.
  2. All plug connections and ground points of the affected current path are OK.
  3. Set all wiring harnesses of the affected current path to a state that corresponds to driving by pulling and shaking them.

Diagnostic conditions

Note. Important Always connect a suitable battery charging device to the vehicle electrical system battery before starting diagnosis. All unnecessary loads must also be switched off.

Note. The fault can only be identified if the requirements listed under 'Diagnostic conditions' are met. For this reason, the specified procedure must be observed after a fault is repaired

  1. Clear fault memory.
  2. Satisfy the requirements listed under 'Diagnostic conditions'.
  3. Read out fault memory again

Diagnosis/troubleshooting

Note. The fault memory Info key [F8] on 9588 Porsche System Tester II can be used to access the 'extended fault memory'. The following information can be displayed

9721 Test cable

Used for troubleshooting servo motors.

Scheme 518

Scheme 518: 9721 Test cable
Scheme 518: 9721 Test cable

Scheme 519

Scheme 519: Manual air conditioning
Scheme 519: Manual air conditioning
  1. Air-conditioning compressor
  2. Pressure sensor
  3. Air conditioning unit
  4. Air-conditioning system regulator control module

Scheme 520

Scheme 520: 2-zone air conditioning system
Scheme 520: 2-zone air conditioning system
  1. Air-conditioning compressor
  2. Pressure sensor
  3. Air conditioning unit
  4. Air-conditioning system regulator control module
  5. Sun sensor

Scheme 521

Scheme 521: 4-zone air conditioning system
Scheme 521: 4-zone air conditioning system
  1. Air-conditioning compressor
  2. Pressure sensor
  3. Front air conditioning unit
  4. Front air-conditioning system regulator control module
  5. Sun sensor
  6. B-pillar servo motors, left and right
  7. Servo motors for passenger blower, rear left and right tunnel
  8. Air-conditioning system regulator control module, rear
  9. Control module for rear seat heating
  10. Rear left and right blower outlet sensor
  11. Rear air conditioning unit

Scheme 522

Scheme 522: Connector assignment
Scheme 522: Connector assignment

Troubleshooting with no control module connected

Note. 9588 Porsche System Tester II and the 'air-conditioning system regulator control module' are not connected.

  1. Ignition on
  2. The fuses of the 'air-conditioning system regulator control module' are OK
  3. The fuses of the 'gateway control module' in the instrument cluster are OK
  4. Battery voltage is OK '(11.4-14.4 V)'
  5. Plug on 'gateway control module' fitted correctly
  6. Plug on 'air-conditioning system regulator control module' fitted correctly
Work instructionDisplay OKIf not OK
1Check 9588 Porsche System Tester II connectionsCheck that the data link connector 9588 Porsche System Tester II is connected correctly to the diagnostic box in the vehicle. Check 9588 Porsche System Tester II connection cable for damage. Check function of 9588 Porsche System Tester II on another vehicle, if necessary.Go to Step 2Repair 9588 Porsche System Tester II --> End
2Check fuse and adjacent voltage in fuse carrier at right of dashboardTerminal 30a power supply 'check fuse F23'11.4 to 14.5 V Go to Step 3Replace any faulty fuse(s) (before doing so, check that the correct fuse was used). If the fuses are intact but there is no voltage, check the wires and repair them if necessary. If the wires are intact, check the fuse box and replace it if faulty. --> End
3Check terminal 30a power supply of 'air-conditioning system regulator control module'Switch off ignition Pull off plug E on 'air-conditioning system regulator control module' Measure voltage between pin 5 and ground11.4 to 14.5 V Go to Step 4Repair wiring fuse F 23 and air-conditioning system regulator control module plug E, pin 5 --> End
4Check terminal 31 ground supply for open circuitSwitch off ignition Measure respective resistance between: Plug E, pin 9 and ground as well as plug E, pin 10 and ground< 5 ohms Go to Step 5Repair/replace wire --> End
5Check gateway in instrument clusterThe gateway in the instrument cluster is in working order if it is possible to connect at least one control module gateway.Go to Step 6Check fuses F26 and F 40 in fuse carrier at left of dashboard Check power supply for gateway Check diagnosis lead Replace gateway --> End
6CAN comfort, check connection to 'air-conditioning system regulator control module'Refer to CHECKING INSTRUCTIONS/CAN DATA BUS .If CAN drive is OK: Go to Step 7
7Replace air-conditioning system regulator control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Power supply for air-conditioning system regulator control module, OK
  4. Internal function test completed on air-conditioning system regulator control module
  1. 4-zone air conditioning system
Work instructionDisplay OKIf not OK
1Read out control module actual values with the 9588 Porsche System Tester IIStatus of front control module'OK''Not OK' Go to Step 2
Status of rear control module'OK' --> End'Not OK' Go to Step 3
2Replace front control module> End
3Replace rear control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Manual and 2-zone air conditioning systems
Work instructionDisplay OKIf not OK
1Read out control module actual values with the 9588 Porsche System Tester IIStatus of control module'OK' --> End'Not OK' Go to Step 2
2Replace air-conditioning system regulator control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check evaporator temperature sensorSwitch off ignition Pull out temperature sensor plug Measure resistance at temperature sensor between pins 1 and 2At 20° C 1.25 ± 0.04 kohms at 40° C 540 ± 20 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off climate control plug A Switch on ignition Measure voltage between climate control plug A, pin 10 and ground0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure resistance between climate control plug A, pin 10 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between climate control plug A, pin 10 and temperature sensor plug, pin 25ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Remove plug E of the air-conditioning system regulator Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure voltage between plug E, pin 12 and ground0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundSwitch off ignition Measure resistance between plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between plug E, pin 12 and plug for evaporator temperature sensor pin 25ohms Go to Step 9Repair/replace wire --> End
8Replace temperature sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0057 is not entered --> EndFault code 0057 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check peripheral equipment for signs of damageGo to Step 3.Repair/replace components)
3Check wire between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for vents at the rear right B-pillar Switch on ignition Measure respective voltage between ground and: Plug B, pin 8, pin 10, plug C, pin 6, plug D, pin 3 and pin 6 and ground< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wire between control module and servo motor for short circuit to groundSwitch off ignition Measure resistance between plug C, pin 6 and groundInfinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 8 and servo motor plug, pins 1, 2, 3, 5 Between plug B, pin 10 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 6 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 7 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug C, pin 6 and servo motor plug, pin 2 Between plug B, pin 10 and servo motor plug, pin 5 Between plug B, pin 8 and servo motor plug, pin 6 Between plug D, pin 3 and servo motor plug, pin 3 Between plug D, pin 7 and servo motor plug, pin 15 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox.5 kohms Go to Step 8Repair/replace wiring harness --> End
8Check servo motor power supplyPush plugs C and D on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox.5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor at the rear right B-pillar, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0057 is not entered --> EndFault code 0057 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0064 is not entered --> EndFault code 0064 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3.Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for vents at the rear left B-pillar Switch on ignition Measure respective voltage between ground and: Plug C, pin 3, plug C, pin 5, plug B, pin 7, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug C, pin 5, plug C, pin 3, plug B, pin 7, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 7 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 3 and servo motor plug, pins 1, 2, 3, 5 Between plug C, pin 5 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 1, 2, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug C, pin 5 and servo motor plug, pin 2 Plug C 3 and servo motor plug, pin 6 Plug B 7 and servo motor plug, pin 5 Plug D 7 and servo motor plug, pin 1 Plug D 3 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plugs C and D on air-conditioning system regulator Connect servo motor plug A Switch on ignition Measure voltage at plug D, air-conditioning system regulator between pin 3 and pin 7Approx. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor at the rear left B-pillar, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0064 is not entered --> EndFault code 0064 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

Fault type 'lower limit value not reached'

  1. Battery voltage OK (11.4 to 14.5 V)
  2. Internal function test completed on air-conditioning system regulator control unit
  3. Engine on
  4. Ambient temperature > 12 °C

Fault type 'upper limit value exceeded'

  1. Battery voltage OK (11.4 to 14.5 V)
  2. Internal function test completed on air-conditioning system regulator control unit
  3. Engine on
Work instructionDisplay okay.If not OK
1Inspect and repair refrigerant circuit Erase fault memory> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0249 is no longer entered --> EndFault code 0249 is entered again Go to Step 2
2Check the blower motor power supplyMeasure voltage between blower motor plug, pin 1 and blower regulator plug A, pin 111.4 to 14.5 V Go to Step 3Repair power supply Fuse F 57 in the fuse carrier on the left Repair/replace wiring harness --> End
3Check blower motorPull off blower regulator plug A Using a test cable (with 25 A fuse), connect jumper to blower regulator plug A between pins 1 and 2Blower motor runs at full power Go to Step 5Blower motor does not function Go to Step 4 Running noise audible Go to Step 9
4Check the ground connections between the blower motor and blower regulatorMeasure resistance between blower regulator plug A, pin 2 and blower motor plug A, pin 2< 5 ohms Go to Step 5Repair/replace wire --> End
5Check signal line for short circuit to B+Remove plug D of the air-conditioning system regulator Pull off blower regulator plug B Switch on ignition Measure voltage between air-conditioning system regulator plug D, pin 13 and ground0.3 V Go to Step 6Repair/replace wiring harness --> End
6Check signal line for short circuit to groundSwitch off ignition Measure the resistance between air-conditioning system regulator plug D, pin 13 and groundInfinity ohms Go to Step 7Repair/replace wiring harness --> End
7Check signal lead for open circuitMeasure resistance between air-conditioning system regulator plug D, pin 13 and blower regulator plug B, pin 2< 5 ohms Go to Step 8Repair/replace wiring harness --> End
8As an experiment, replace the blower regulator, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0249 is not entered --> EndFault code 0249 is entered again Go to Step 10
9Replace front blower motor> End
10Replace front air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0342 is not entered --> EndFault code 0342 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug A from servo motor for foot-well flap Switch on ignition Measure respective voltage between ground and: Plug E, pins 1, 8, plug A, pins 11, 21, 22< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 11, 21, 22Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6 Between plug E, pin 8 and servo motor plug, pins 2, 3, 5, 6 Between plug A, pin 11 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 21 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1 Plug A, pin 11 and servo motor plug, pin 2 Plug A, pin 21 and servo motor plug, pin 6 Plug A, pin 22 and servo motor plug, pin 55 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0342 is not entered --> EndFault code 0342 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
Work instructionDisplay OKIf not OK
1Check batteryGo to Step 2Charge or replace battery --> End
2Check the generatorRun engine fast idle speed of approx. 2000 to 3000 rpm Measure generator voltageApprox. 13 to 14 V Go to Step 3Repair charging system --> End
3Delete fault memory with the 9588 Porsche System Tester II Satisfy diagnostic conditions Read out fault memory againFault code 0352 is no longer entered --> EndEnter fault code 0352 again or no communication possible Go to Step 4
4Check terminal 30 power supply to rear air-conditioning system regulator control moduleSwitch off ignition Pull off plug D from air-conditioning system regulator and remove protective cap from plug housing Push plug D on the air-conditioning system regulator Switch on ignition Measure air-conditioning system regulator voltage between plug D, pin 1 and plug D, pin 1511.4 to 14.5 V Go to Step 8Check fuse F25 in fuse carrier at right of dashboard If fuse OK Go to Step 5 If fuse not OK, replace fuse --> End
5Check power supply, terminal 30 supply voltageMeasure voltage between plug D, pin 1 and ground (body)11.4 to 14.5 V 'Repair/replace ground lead'Go to Step 6
6Check power supply for short circuit to groundRemove plug D of the air-conditioning system regulator Remove fuse F 23 (fuse carrier on the right) Measure the resistance between plug D, pin 1 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check power supply for open circuitMeasure the resistance between plug D, pin 1 and right fuse carrier, pin 25aGo to Step 8Repair/replace wire --> End
8Replace rear air-conditioning system regulator control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0353 is no longer entered --> EndEnter fault code 0353 again Go to Step 2
2Check the blower motor power supplyMeasure voltage between blower motor plug pin 1 and blower regulator plug A pin 111.4 to 14.5 V Go to Step 3Repair power supply Fuse F 56 in the fuse carrier on the left Repair/replace wiring harness --> End
3Check blower motorPull off blower regulator plug A Using a test cable (with 40 A fuse), connect jumper to blower regulator plug A between pins 1 and 2Blower motor runs at full power Go to Step 4Blower motor does not function or running noise is audible Go to Step 8
4Check the ground connections between the blower motor and blower regulatorMeasure resistance between blower regulator plug A, pin 2 and blower motor plug A, pin 2< 5 ohms Go to Step 5Repair/replace wire --> End
5Check signal line for short circuit to B+Remove plug C of the air-conditioning system regulator Pull off blower regulator plug B Switch on ignition Measure voltage between plug C, air-conditioning system regulator pin 12 and ground< 0.3 V Go to Step 6Repair/replace wiring harness --> End
6Check signal line for short circuit to groundSwitch off ignition Measure the resistance between air-conditioning system regulator plug C, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wiring harness --> End
7Check signal lead for open circuitMeasure resistance between plug C, pin 12 and blower regulator plug B, pin 35 ohms Go to Step 8Repair/replace wiring harness --> End
8As an experiment, replace the blower regulator, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0353 is not entered --> EndFault code 0353 is entered again Go to Step 10
9Replace front blower motor> End
10Replace front air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check front left blower outlet sensorSwitch off ignition Pull out blower outlet sensor Measure resistance at blower outlet sensor between pins 1 and 2At 20° C 12.2 ± 0.4 kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off air conditioning system regulator plug A Switch on ignition Measure voltage between pin 15 of air-conditioning system regulator plug A and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure the resistance between air-conditioning system regulator plug A, pin 15 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between air-conditioning system regulator plug A, pin 15 and pin 2 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Remove plug E of the air-conditioning system regulator Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundMeasure resistance between air-conditioning system regulator plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between air-conditioning system regulator plug E, pin 12 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 9Repair/replace wire --> End
8Replace blower outlet sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check front right blower outlet sensorSwitch off ignition Pull out blower outlet sensor Measure resistance at blower outlet sensor between pins 1 and 2At 20° C 12.2 ± 0.4 kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off air conditioning system regulator plug A Switch on ignition Measure voltage between pin 5 of air-conditioning system regulator plug A and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure resistance between pin 5 of air-conditioning system regulator plug A and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between air-conditioning system regulator plug A, pin 5 and pin 2 of blower outlet sensor< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Remove plug E of the air-conditioning system regulator Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundMeasure resistance between air-conditioning system regulator plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between air-conditioning system regulator plug E, pin 12 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 9Repair/replace wire --> End
8Replace blower outlet sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0362 is not entered --> EndFault code 0362 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 2, plug B, pin 4, plug C, pin 4, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 2, plug B, pin 4, plug C, pin 4, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 2 and servo motor plug, pins 1, 2, 3 and 6 Between plug B, pin 4 and servo motor plug, pins 1, 2 and 3 Between plug C, pin 4 and servo motor plug, pins 1 and 3 Between plug D, pin 3 and servo motor plug, pin 3Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 2 and servo motor plug, pin 5 Plug B, pin 4 and servo motor plug, pin 6 Plug C, pin 4 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 3 Plug D, pin 7 and servo motor plug, pin 1< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage at plug D, air-conditioning system regulator between pin 3 and pin 7Approx. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0362 is not entered --> EndFault code 0362 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0363 is not entered --> EndFault code 0363 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from rear air-conditioning system regulator and plug from servo motor for rear right temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 3, plug B, pin 5, plug C, pin 7, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 3, plug B, pin 7, plug C, pin 7, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 3 and servo motor plug, pins 1, 2, 3, 5 Between plug B, pin 5 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 7 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 3 and servo motor plug, pin 6 Plug B, pin 5 and servo motor plug, pin 5 Plug C, pin 7 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0363 is not entered --> EndFault code 0363 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Internal function test on air-conditioning system regulator control module
  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Read out fault type in extended fault memoryFor fault type 'Please read out fault memory' Go to Step 2 For fault type 'Implausible signal' Go to Step 2 For fault type 'No signal/communication' Go to Step 3
2Read out fault memory of the vehicle electrical system control module (CAN comfort) Refer to FAULT OVERVIEW Vehicle electrical system (BNSG), also see 97 10 19 REMOVING AND INSTALLING VEHICLE ELECTRICAL SYSTEM CONTROL UNIT - AS OF MY 2003 (ALL MODELS)> End
3Continue troubleshooting Refer to CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check outlet temperature sensorSwitch off ignition Disconnect plug from rear right outlet temperature sensor Measure resistance at outlet temperature sensor between pins land 2At 20° C12.2 ± 0.4 kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 7
2Check wiring for short circuit to B+Remove plug D of the rear air-conditioning system regulator Switch on ignition Measure respective voltage between ground and: Plug D, pins 6 and 11< 0.3 V Go to Step 3Repair/replace wiring harness --> End
3Check wiring for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug D, pins 6 and 11Infinity ohms Go to Step 4Repair/replace wiring harness --> End
4Check wiring for open circuitMeasure resistance between plug D, pin 11 and pin 2 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wiring harness --> End
Measure resistance between plug D, pin 6 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesMeasure resistance at plug D between pin 6 and pin 11Infinity ohms Go to Step 7Repair/replace wiring harness --> End
6Replace outlet temperature sensor> End
7Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check outlet temperature sensorSwitch off ignition Disconnect plug from rear right outlet temperature sensor Measure resistance at outlet temperature sensor between pins land 2At 20° C 12.2 ± 0.4 kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 6
2Check wiring for short circuit to B+Remove plug D of the rear air-conditioning system regulator Switch on ignition Measure respective voltage between ground and: Plug D, pins 6 and 10< 0.3 V Go to Step 3Repair/replace wiring harness --> End
3Check wiring for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug D, pins 6 and 10Infinity ohms Go to Step 4Repair/replace wiring harness --> End
4Check wiring for open circuitMeasure resistance between plug D, pin 10 and pin 2 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wiring harness --> End
Measure resistance between plug D, pin 6 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesMeasure resistance at plug D between pin 6 and pin 10Infinity ohms Go to Step 7Repair/replace wiring harness --> End
6Replace outlet temperature sensor> End
7Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on for min. 10 s.
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems
Work instructionDisplay OKIf not OK
1Check wiring for short circuit to B+Switch off ignition Remove plugs A, C and E from control module Pull out sun sensor plug Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 1 and ground< 0.3 V Go to Step 2Repair/replace wiring harness --> End
2Check wiring for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug E, pin 1 and groundInfinity ohms Go to Step 3Repair/replace wiring harness --> End
3Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Manual air conditioning
Work instructionDisplay OKIf not OK
1Check wiring for short circuit to B+Switch off ignition Remove plugs A, C and E from control module Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 1 and ground< 0.3 V Go to Step 2Repair/replace wiring harness --> End
2Check wiring for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug E, pin 1 and groundInfinity ohms Go to Step 3Repair/replace wiring harness --> End
3Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Read out fault type in extended fault memoryFor fault type 'No signal/communication' Go to Step 2 For fault type 'Faulty' Go to Step 3
2Continue troubleshooting in CHECKING INSTRUCTIONS/CAN DATA BUS .> End
3Rear air-conditioning system regulator control module faulty> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0657 is not entered --> EndFault code 0657 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for central vents Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pins 1 and 8, plug A, pins 1, 9 and 14< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1 and 8, plug A, pins 1, 9 and 14Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6 Between plug E, pin 8 and servo motor plug, pins 1, 2, 5, 6 Between plug A, pin 1 and servo motor plug, pins 1, 2, 3, 6 Between plug A, pin 9 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 1 and servo motor plug, pin 5 Plug A, pin 9 and servo motor plug, pin 6 Plug A, pin Hand servo motor plug, pin 2< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motorApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor for the central vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0657 is not entered --> EndFault code 0657 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  4. Engine on
  5. Engine speed > 2,000 rpm
Work instructionDisplay OKIf not OK
1Check batteryGo to Step 2Replace battery --> End
2Check charge voltage/current on three-phase generatorEngine speed > 2,000 rpm11.4 to 14.5 V Go to Step 3Wiring/regulator or diodes faulty. Repair wiring or generator --> End
3Perform visual inspectionCheck plug connection as well as peripheral equipment of air-conditioning system regulator control module and the connecting point of plugs 3 and 4 for damageGo to Step 4Repair/replace wiring harness, plug --> End
4Check terminal 30 power supply to air-conditioning system regulator control moduleSwitch off ignition Pull off plug E on air-conditioning system regulator control module Measure voltage between control module plug, pin 5 and ground11.4 to 14.5 V Go to Step 5Check connecting point of plug 4, pin 10 and fuse F23 in fuse carrier at right of dashboard Repair/replace wiring harness
5Check terminal 31 ground supply to air-conditioning system regulator control moduleMeasure voltage between control module plug E, pin 9 and battery positive Measure voltage between control module plug E, pin 10 and battery positive11.4 to 14.5 V Go to Step 6Repair/replace ground lead --> End
6Check power supply line for short circuit to groundSwitch off ignition Remove plug E of the air-conditioning system regulator control module Remove fuse F23 from fuse carrier at right of dashboard Switch on ignition Measure voltage between control module plug, pin 5 and ground< 0.3 V Go to Step 7Repair/replace wiring harness --> End
7Check ground supply line for short circuit to B+Measure voltage between control module plug E, pin 9 and body ground Measure voltage between control module plug E, pin 10 and body ground< 0.3 V Go to Step 8Short circuit to B+ in the connecting point of plug 3, pin 6 and in the line to control module plug E and body ground point 22 Repair wiring --> End
8Check power supply line for open circuitSwitch off ignition Pull off plug E on air-conditioning system regulator control module Measure resistance between control module plug E, pin 5 and fuse F23 in fuse carrier at right of dashboard< 5 ohms Go to Step 9Repair/replace wiring harness --> End
9Check ground supply line for open circuitMeasure resistance between control module plug E, pin 9 and body ground Measure resistance between control module plug E, pin 10 and body ground< 5 ohms Go to Step 10Repair/replace wiring harness --> End
10Check terminal 30 power supply to fuse F23 in fuse carrier at right of dashboardMeasure voltage between fuse plug F23 in fuse carrier at right of dashboard and body ground11.4 to 14.5 V Go to Step 11Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End
11Replace air-conditioning system regulator control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check sun sensor voltage supplySwitch off ignition Pull out sun sensor plug Switch on ignition Measure voltage between pin 1 and pin 2 of sun sensor plugApprox. 5 V Go to Step 2Repair power supply
2Check wiring for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator Switch on ignition Measure respective voltage between: Plug E, pins 1, 12 and ground Plug C, pins 7, 15 and ground< 0.3 V Go to Step 3Repair/replace wiring harness
3Check wiring for short circuit to groundSwitch off ignition Measure respective resistance between: Plug E, pins 1, 12 and ground Plug C, pins 7, 15 and groundInfinity ohms Go to Step 4Repair/replace wiring harness
4Check wiring for open circuitMeasure respective resistance between: Plug E, pin 12 and sun sensor plug, pin 2 Plug E, pin 1 and sun sensor plug, pin 1 Plug C, pin 15 and sun sensor plug, pin 4 Plug C, pin 7 and sun sensor plug, pin 3< 5 ohms Go to Step 5Repair/replace wiring harness
5As an experiment, replace the sun sensor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0709 is not entered --> EndFault code 0709 is entered again Go to Step 6
6Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems DIAGNOSIS/TROUBLESHOOTING CHART Work instruction Display OK If not OK 1 Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 0710 is not entered --> End Fault code 0710 is entered Go to Step 2 2 Perform visual inspection Check flap for stiff operation Check plug contacts and peripheral equipment for signs of damage Go to Step 3 Repair component(s) 3 Check wires between control module and servo motor for short circuit to B+ Switch off ignition Pull off plug 4 (disconnection point Climatronic) Remove plugs A, B, C and E from air-conditioning system regulator and plug from defrost flap servo motor Switch on ignition Measure respective voltage between ground and: Plug A, pin 2, plug C, pin 6, plug C, pin 24, plug E, pin 1, plug E, pin 8 < 0.3 V Go to Step 4 Repair/replace wiring harness --> End 4 Check wires between control module and servo motor for short circuit to ground Switch off ignition Measure respective resistance between ground and: Plug A, pin 2, plug C, pin 6, plug C, pin 24, plug E, pin 1, plug E, pin 8 infinity ohms Go to Step 5 Repair/replace wiring harness --> End 5 Check for short circuit between lines Disconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug A, pin 2 and servo motor plug, pins 1, 3, 5, 6 Between plug C, pin 6 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 24 and servo motor plug, pins 1, 2, 3, 5 Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6 infinity ohms Go to Step 6 Repair/replace wiring harness --> End 6 Check wiring between control module and servo motor for open circuit Measure resistance between plug A, pin 2 and servo motor plug, pin 2 Plug C, pin 6 and servo motor plug, pin 5 Plug C, pin 24 and servo motor plug, pin 6 Plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1 < 5 ohms Go to Step 7 Repair/replace wiring harness --> End 7 Check internal resistance of servo motor Measure resistance between pins 1 and 3 of servo motor approx. 4 to 5 kohms Go to Step 8 Go to Step 9 8 Check servo motor power supply Push plugs B and E on air-conditioning system regulator Push on plug 4 (disconnection point Climatronic) Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plug approx. 5 V Go to Step 9 Go to Step 10 9 As an experiment, replace the defrost flap servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 0710 is not entered --> End Fault code 0710 is entered again Go to Step 10 10 Replace air-conditioning system regulator --> End
  2. Manual air conditioning DIAGNOSIS/TROUBLESHOOTING CHART Work instruction Display OK If not OK 1 Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 0710 is not entered --> End Fault code 0710 is entered Go to Step 2 2 Perform visual inspection Check flap for stiff operation Check plug contacts and peripheral equipment for signs of damage Go to Step 3 Repair component(s) 3 Check wires between control module and servo motor for short circuit to B+ Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug from defrost flap servo motor Switch on ignition Measure respective voltage between ground and: Plug A, pin 1, plug A, pin 9, plug C, pin 15, plug E, pin 1, plug E, pin 8 < 0.3 V Go to Step 4 Repair/replace wiring harness --> End 4 Check wires between control module and servo motor for short circuit to ground Switch off ignition Measure respective resistance between ground and: Plug A, pin 1, plug A, pin 9, plug C, pin 15, plug E, pin 1, plug E, pin 8 infinity ohms Go to Step 5 Repair/replace wiring harness --> End 5 Check for short circuit between lines Disconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug A, pin 1 and servo motor plug, pins 1, 2, 3, 5 Between plug A, pin 9 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 15 and servo motor plug, pins 1, 3, 5, 6 Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6 infinity ohms Go to Step 6 Repair/replace wiring harness --> End 6 Check wiring between control module and servo motor for open circuit Measure resistance between plug A, pin 1 and servo motor plug, pin 6 Plug A, pin 9 and servo motor plug, pin 5 Plug C, pin 15 and servo motor plug, pin 2 Plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1 < 5 ohms Go to Step 7 Repair/replace wiring harness --> End 7 Check internal resistance of servo motor Measure resistance between pins 1 and 3 of servo motor approx. 4 to 5 kohms Go to Step 8 Go to Step 9 8 Check servo motor power supply Push plugs A, C and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plug approx. 5 V Go to Step 9 Go to Step 10 9 As an experiment, replace the defrost flap servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 0710 is not entered --> End Fault code 0710 is entered again Go to Step 10 10 Replace air-conditioning system regulator --> End
  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0711 is not entered --> EndFault code 0711 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for left footwell flap Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pins 1 and 8, plug A, pins 11, 21 and 22< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 11, 21 and 22Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6 Between plug E, pin 8 and servo motor plug, pins 1, 2, 5, 6 Between plug A, pin 11 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 21 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 11 and servo motor plug, pin 2 Plug A, pin 21 and servo motor plug, pin 6 Plug A, pin 22 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 k ohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Connect servo motor plug A Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0711 is not entered --> EndFault code 0711 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0712 is not entered --> EndFault code 0712 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug for servo motor for right footwell flap Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pin 1, plug E pin 8, plug B, pin 14, plug B, pin 19, plug B, pin 20< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pin 1, plug E pin 8, plug B, pin 14, plug B, pin 19, plug B, pin 20Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 1, 2, 5,6 Between plug E, pin 8 and servo motor plug, pins 2, 3, 5, 6 Between plug B, pin 14 and servo motor plug, pins 1, 3, 5, 6 Between plug B, pin 19 and servo motor plug, pins 1, 2, 3, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1 Plug B, pin 14 and servo motor plug, pin 2 Plug B, pin 19 and servo motor plug, pin 5 Plug B, pin 20 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Connect servo motor plug A Switch on ignition Measure voltage between pin 1 and pin 3 of servo motorApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0712 is not entered --> EndFault code 0712 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0713 is not entered --> EndFault code 0713 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for left central vents Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pins 1 and 8, plug A, pins 1, 9 and 14< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1 and 8, plug A, pins 1, 9 and 14Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6 Between plug E, pin 8 and servo motor plug, pins 1, 2, 5, 6 Between plug A, pin 1 and servo motor plug, pins 1, 2, 3, 6 Between plug A, pin 9 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 1 and servo motor plug, pin 5 Plug A, pin 9 and servo motor plug, pin 6 Plug A, pin Hand servo motor plug, pin 2< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin A 1 and pin A 3 of servo motorApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor for the left central vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0713 is not entered --> EndFault code 0713 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0714 is not entered --> EndFault code 0714 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for right central vents Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure respective voltage between ground and: Plug B, pin 10, plug B pin 17, plug B, pin 18, plug E, pin 1, plug E, pin 8< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 10, plug B pin 17, plug B, pin 18, plug E, pin 1, plug E, pin 8Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 10 and servo motor plug, pins 1, 3, 5, 6 Between plug B, pin 17 and servo motor plug, pins 1, 2, 3, 6 Between plug B, pin 18 and servo motor plug, pins 1, 2, 3, 5 Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 10 and servo motor plug, pin 2 Plug B, pin 17 and servo motor plug, pin 5 Plug B, pin 18 and servo motor plug, pin 6 Plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs B and E on air-conditioning system regulator Push on plug from servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor for the right central vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0714 is not entered --> EndFault code 0714 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check air intake temperature sensorSwitch off ignition Pull out air intake temperature sensor plug Measure resistance at air intake temperature sensor between pins 1 and 2At 20° C 1.25 ± 0.04 kohms at 40° C 540 + 20 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off climate control plug A Switch on ignition Measure voltage between climate control plug A pin 4 and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure resistance between climate control plug A, pin 4 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between climate control plug A, pin 4 and temperature sensor plug, pin 2< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Remove plug C of the air-conditioning system regulator Switch on ignition Measure voltage between plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundSwitch off ignition Measure resistance between plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between plug E, pin 12 and plug A to ground< 5 ohms Go to Step 9Repair/replace wire --> End
8Replace temperature sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check sun sensor voltage supplySwitch off ignition Pull out sun sensor plug Switch on ignition Measure voltage between pin 1 and pin 2 of sun sensor plugApprox. 5 V Go to Step 2Repair power supply
2Check wiring for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator Switch on ignition Measure respective voltage between: Plug E, pins 1, 12 and ground Plug C, pins 7, 15 and ground< 0.3 V Go to Step 3Repair/replace wiring harness
3Check wiring for short circuit to groundSwitch off ignition Measure respective resistance between: Plug E, pins 1, 12 and ground Plug C, pins 7, 15 and groundInfinity ohms Go to Step 4Repair/replace wiring harness
4Check wiring for open circuitMeasure respective resistance between: Plug E, pin 12 and sun sensor plug, pin 2 Plug E, pin 1 and sun sensor plug, pin 1 Plug C, pin 15 and sun sensor plug, pin 4 Plug C, pin 7 and sun sensor plug, pin 3< 5 ohms Go to Step 5Repair/replace wiring harness
5As an experiment, replace the sun sensor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 0797 is not entered --> EndFault code 0797 is entered again Go to Step 6
6Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. Manual air conditioning
Work instructionDisplay OKIf not OK
1Check evaporator temperature sensorSwitch off ignition Pull out temperature sensor plug Measure resistance at temperature sensor between pins 1 and 2At 20° C 1.25 ± 0.04 kohms at 40° C 540 ± 20 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Remove plug C of the climate control Switch on ignition Measure voltage between climate control plug C, pin 21 and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure resistance between climate control plug C, pin 21 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between climate control plug C, pin 21 and temperature sensor plug, pin 1< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Remove plug E of the air-conditioning system regulator Switch on ignition Measure voltage between plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundMeasure resistance between plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between plug E, pin 12 and plug for temperature sensor, pin 2< 5 ohms Go to Step 9Repair/replace wire --> End
8Replace temperature sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  4. Engine on
Work instructionDisplay OKIf not OK
1Check power supply for pressure sensorSwitch off ignition Pull out pressure sensor plug Switch on ignition Measure voltage on plug of pressure sensor, between pins 1 and 311.4 to 14.4 V Go to Step 2Check fuse F 11 (in radiator tank to the left) Repair/replace wiring harness Go to Step 6
2Check sensor wire for short circuit to B+Switch off ignition Remove plug C of the air-conditioning system regulator Pull out pressure sensor plug Switch on ignition Measure voltage between plug C, pin 23 and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check sensor wire for short circuit to groundMeasure resistance between plug C, pin 23 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check sensor wire for open circuitMeasure resistance between air-conditioning system regulator plug C, pin 23 and pin 2 of pressure sensor plug< 5 ohms Go to Step 5Repair/replace wire --> End
5Check/replace air conditioning, refrigerantGo to Step 6Replace refrigerant --> End
6Replace pressure sensor> EndGo to Step 7
7Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Engine on
  2. Engine speed > 2,000 rpm
Work instructionDisplay OKIf not OK
1Check power supply, fuse F 11 (fuse carrier in radiator tank)Go to Step 4Replace fuse Satisfy diagnostic conditions If fuse is faulty againGo to Step 2
2Check power supply for short circuit to groundSwitch off ignition Remove fuse F11 Pull out air-conditioning compressor plug Switch on ignition Measure resistance between air-conditioning compressor plug and groundInfinity ohms Go to Step 3Repair/replace wiring harness --> End
3Check AC valve for short circuit to groundMeasure resistance at air-conditioning compressor between ground and: Pin 1 Pin 2Infinity ohms Go to Step 4Go to Step 9
4Check AC valve for open circuitMeasure resistance at air-conditioning compressor between pins 1 and 210 to 12 ohms Go to Step 5Go to Step 9
5Check voltage supplySwitch off ignition Pull out air-conditioning compressor plug Remove plug E of the air-conditioning system regulator Switch on ignition Measure voltage between pin 1 of air-conditioning compressor plug and ground11.4 to 14.4 V Go to Step 6Repair/replace wiring harness between air-conditioning compressor and fuse carrier --> End
Measure voltage between air-conditioning system regulator plug E, pin 11 and ground11.4 to 14.4 V Go to Step 6Repair/replace wiring harness between fuse carrier and air-conditioning system regulator --> End
6Check signal line for short circuit to B+Switch off ignition Remove plug E of the air-conditioning system regulator Switch on ignition Measure voltage between plug E, pin 4 and ground< 0.3 V Go to Step 7Repair/replace wiring harness --> End
7Check signal line for short circuit to groundMeasure resistance between plug E, pin 4 and groundInfinity ohms Go to Step 8Repair/replace wiring harness --> End
8Check signal lead for open circuitMeasure resistance between plug E, pin 4 air-conditioning compressor plug, pin 2< 5 ohms Go to Step 10Repair/replace wiring harness --> End
9Replace air-conditioning compressor> End
10Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems DIAGNOSIS/TROUBLESHOOTING CHART Work instruction Display OK If not OK 1 Check line for short circuit to B+ Switch off ignition Remove plug C from air-conditioning system regulator Switch on ignition Measure voltage between plug C, pin 14 and ground < 0.3 V Step 2 Repair/replace wiring harness 2 Check line for short circuit to ground Measure resistance between plug C, pin 14 and ground infinity ohms Go to Step 3 Repair/replace wiring harness 3 Check line for open circuit Measure resistance between air-conditioning system regulator plug C, pin 14 and relay socket (V8 naturally-aspirated engine --> relay socket 4; V8 Turbo and V6 --> relay socket 8) pin C. < 5 ohms Go to Step 4 Repair/replace wiring harness 4 As an experiment, replace relay, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 1020 is not entered --> End Fault code 1020 is entered Go to Step 5 5 Replace control module --> End
  2. Manual air conditioning DIAGNOSIS/TROUBLESHOOTING CHART Work instruction Display OK If not OK 1 Check line for short circuit to B+ Switch off ignition Pull off air conditioning system regulator plug A Disconnect relay 'relay socket 8 relay box to the right' Switch on ignition Measure voltage between plug A, pin 18 and ground < 0.3 V Step 2 Repair/replace wiring harness 2 Check line for short circuit to ground Measure resistance between plug A, pin 18 and ground infinity ohms Go to Step 3 Repair/replace wiring harness 3 Check line for open circuit Measure resistance between plug A, pin 18 and relay socket pin C. < 5 ohms Go to Step 4 Repair/replace wiring harness 4 As an experiment, replace relay, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again Fault code 1020 is not entered --> End Fault code 1020 is entered Go to Step 5 5 Replace control module --> End
  1. Ignition on
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1087 is no longer entered --> EndFault code 1087 is entered again Refer to " VEHICLE VOLTAGE TERMINAL 30 " --> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1189 is not entered --> EndFault code 1189 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug A from servo motor for air distribution Switch on ignition Measure respective voltage between ground and: Plug E, pins 1, 8, plug A, pins 14, 23, 24< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 14, 23, 24Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6 Between plug E, pin 8 and servo motor plug, pins 2, 3, 5, 6 Between plug A, pin 14 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 23 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1 Plug A, pin Hand servo motor plug, pin 2 Plug A, pin 23 and servo motor plug, pin 6 Plug A, pin 24 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1189 is not entered --> EndFault code 1189 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Continue troubleshooting in CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check front left blower outlet sensorSwitch off ignition Pull out blower outlet sensor Measure resistance at blower outlet sensor between pins 1 and 2At 20° C 12.2 ± kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off air conditioning system regulator plug A Switch on ignition Measure voltage between pin 7 of air-conditioning system regulator plug A and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug A, pin 7 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between air-conditioning system regulator plug A, pin 7 and pin 2 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between air-conditioning system regulator plug E, pin 12 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 8Repair/replace wire --> End
8Replace blower outlet sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check front right blower outlet sensorSwitch off ignition Pull out blower outlet sensor Measure resistance at blower outlet sensor between pins 1 and 2At 20° C 12.2 ± kohms at 40° C 5.7 ± 0.3 kohms Go to Step 2Go to Step 8
2Check signal line for short circuit to B+Pull off climate control plug A Switch on ignition Measure voltage between pin 6 of air-conditioning system regulator plug A and ground< 0.3 V Go to Step 3Repair/replace wire --> End
3Check signal line for short circuit to groundSwitch off ignition Measure the resistance between air-conditioning system regulator plug A pin 6 and groundInfinity ohms Go to Step 4Repair/replace wire --> End
4Check signal lead for open circuitMeasure resistance between air-conditioning system regulator plug A, pin 6 and pin 2 of blower outlet sensor plug< 5 ohms Go to Step 5Repair/replace wire --> End
5Check 'ground sensor' wire for short circuit to B+Pull off plug 4 (disconnection point Climatronic 2) Switch on ignition Measure voltage between air-conditioning system regulator plug E, pin 12 and ground< 0.3 V Go to Step 6Repair/replace wire --> End
6Check 'ground sensor' wire for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug E, pin 12 and groundInfinity ohms Go to Step 7Repair/replace wire --> End
7Check 'ground sensor' wire for open circuitMeasure resistance between air-conditioning system regulator plug E, pin 12 and pin 1 of blower outlet sensor plug< 5 ohms Go to Step 8Repair/replace wire --> End
8Replace blower outlet sensor> End
9Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1271 is not entered --> EndFault code 1271 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug A from servo motor for temperature valve Switch on ignition Measure respective voltage between ground and: Plug E, pins 1, 8, plug A, pins 8, 13, 16< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 8, 13, 16Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 1, 2, 5, 6 Between plug E, pin 8 and servo motor plug, pins 2, 3, 5, 6 Between plug A, pin 13 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 16 and servo motor plug, pins 1, 2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 13 and servo motor plug, pin 2 Plug A, pin 16 and servo motor plug, pin 6 Plug A, pin 8 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1271 is not entered --> EndFault code 1271 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Read out fault type in extended fault memoryFor fault type 'Please read out fault memory' Go to Step 2 For fault type 'Implausible signal' Go to Step 2 For fault type 'No signal/communication' Go to Step 3
2Read out fault memory of the gateway control module (CAN comfort), refer to FAULT OVERVIEW ; Gateway. Also see 90 35 19 REMOVING AND INSTALLING GATEWAY CONTROL UNIT - AS OF MY 2005 (ALL MODELS) .> End
3Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Read out fault type in extended fault memoryFor fault type 'Please read out fault memory' Go to Step 2 For fault type 'Implausible signal' Go to Step 2 For fault type 'No signal/communication' Go to Step 3
2Read out fault memory of rear convenience system control module (CAN comfort) Refer to Rear convenience system; FAULT OVERVIEW , also see 97 10 19 REMOVING AND INSTALLING VEHICLE ELECTRICAL SYSTEM CONTROL UNIT - AS OF MY 2003 (ALL MODELS) .> End
3Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check wiring for short circuit to B+Switch off ignition Remove plug C from rear air-conditioning system regulator Remove potentiometer plug from rear left seat heating Remove plug from rear left seat heating Remove plug from rear left seat heating control module Switch on ignition Measure voltage between plug C, air-conditioning system regulator pin 10 and ground< 0.3 V Go to Step 2Repair/replace wiring harness --> End
2Check wiring for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug C, pin 10 and groundInfinity ohms Go to Step 3Repair/replace wiring harness --> End
3Check wiring for open circuitMeasure the resistance between air-conditioning system regulator plug C, pin 10 and: Seat heating potentiometer plug, pin 6 Seat heating plug, pin 3 Seat heating control module plug, pin 2Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check temperature sensor 'NTC'Measure resistance between '4-pin' seat heating disconnection point, pins 3 and 4At 20° C approx. 9.5 kohms at 40° C approx. 4.5 kohms Step 7Replace temperature sensor --> End
6As an experiment, replace seat heating control module, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 15000 is not entered --> EndFault code 15000 is entered again Go to Step 7
7Replace rear air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check wiring for short circuit to B+Switch off ignition Remove plug C from rear air-conditioning system regulator Remove potentiometer plug from rear left seat heating Remove plug from rear left seat heating Remove plug from rear left seat heating control module Switch on ignition Measure voltage between plug C, air-conditioning system regulator pin 11 and ground< 0.3 V Go to Step 2Repair/replace wiring harness --> End
2Check wiring for short circuit to groundSwitch off ignition Measure resistance between air-conditioning system regulator plug C, pin 11 and groundInfinity ohms Go to Step 3Repair/replace wiring harness --> End
3Check wiring for open circuitMeasure resistance between air-conditioning system regulator plug C, pin 11 and: Seat heating potentiometer plug, pin 6 Seat heating plug, pin 3 Seat heating control module plug, pin 2Infinity ohms Go to Step 5Repair/replace wiring harness --> End
4Check temperature sensor 'NTC'Measure resistance between '4-pin' seat heating disconnection point, pins 3 and 4At 20° C approx. 9.5 kohms at 40° C approx. 4.5 kohms Step 6Replace temperature sensor --> End
5As an experiment, replace seat heating control module, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 15001 is not entered --> EndFault code 15001 is entered again Go to Step 6
6Replace rear air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check air quality sensor power supplySwitch off ignition Pull out air quality sensor plug Switch on ignition Measure voltage between pin 1 and pin 2 of (air quality sensor) plug11.4 to 14.4 V Go to Step 2Check/repair power supply
2Check line for short circuit to B+Switch off ignition Remove plug C from air-conditioning system regulator Switch on ignition Measure voltage between plug C, pin 19 and ground< 0.3 V Go to Step 3Repair/replace wiring harness
3Check line for short circuit to groundSwitch off ignition Measure resistance between plug C, pin 19 and groundInfinity ohms Go to Step 4Repair/replace wiring harness
4Check line for open circuitMeasure resistance between plug C, pin 19 and air quality sensor plug, pin 3< 5 ohms Go to Step 5Repair/replace wiring harness
5As an experiment, replace the air quality sensor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1592 is not entered --> EndFault code 1592 is entered again Go to Step 6
6Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1596 is not entered --> EndFault code 1596 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug from servo motor for fresh-air/recirculation valve Switch on ignition Measure respective voltage between ground and: Plug A, pin 3, plug A, pin 17, plug A, pin 18, plug E, pin 1, plug E, pin 8< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug A, pin 3, plug A, pin 17, plug A, pin 18, plug E, pin 1, plug E, pin 8Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug A, pin 3 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 17 and servo motor plug, pins 1, 2, 3, 6 Between plug A, pin 18 and servo motor plug, pins 1, 2, 3, 5 Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug A, pin 3 and servo motor plug, pin 2 Plug A, pin 17 and servo motor plug, pin 5 Plug A, pin 18 and servo motor plug, pin 6 Plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs B and E on air-conditioning system regulator Push on plug 4 (disconnection point Climatronic) Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the recirculation valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1596 is not entered --> EndFault code 1596 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Manual air conditioning
Work instructionDisplay OKIf not OK
1Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 2Repair component(s)
2Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug from servo motor for fresh-air/recirculation valve Switch on ignition Measure respective voltage between ground and: Plug A, pin 19, plug A, pin 20< 0.3 V Go to Step 3Repair/replace wiring harness --> End
3Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug A, pin 19, plug A, pin 20Infinity ohms Go to Step 4Repair/replace wiring harness --> End
4Check wiring between control module and servo motor for open circuitMeasure resistance between air-conditioning system regulator plug A, pin 19 and pin 6 of servo motor plug Measure resistance between air-conditioning system regulator plug A, pin 20 and pin 5 of servo motor plug< 5 ohms Go to Step 5Repair/replace wiring harness
5As an experiment, replace the servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again> EndGo to Step 6
6Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1809 is not entered --> EndFault code 1809 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor left temperature valve Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pin 1, plug E, pin 8, plug A, pin 8, plug A, pin 13, plug A, pin 16< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 8, 13, 16Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 1,2, 5,6 Between plug E, pin 8 and servo motor plug, pins 2, 3, 5, 6 Between plug A, pin 8 and servo motor plug, pins 1, 2, 3, 6 Between plug A, pin 13 and servo motor plug, pins 1, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and plug A, pin 3 Plug E, pin 8 and servo motor plug, pin 1 Plug A, pin 8 and servo motor plug, pin 5 Plug A, pin 13 and servo motor plug, pin 2 Plug A, pin 16 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1809 is not entered --> EndFault code 1809 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1810 is not entered --> EndFault code 1810 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, B, C and E from air-conditioning system regulator and plug A from servo motor for right temperature valve Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pin 1, plug E, pin 8, plug A, pin 12, plug A, pin 19, plug A, pin 20< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pin 1, plug E, pin 8, plug A, pin 12, plug A, pin 19, plug A, pin 20Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6 Between plug E, pin 8 and servo motor plug, pins 1, 2, 5,6 Between plug A, pin 12 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 19 and servo motor plug, pins 1,2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 12 and servo motor plug, pin 2 Plug A, pin 19 and servo motor plug, pin 6 Plug A, pin 20 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace right temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1810 is not entered --> EndFault code 1810 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1863 is not entered --> EndFault code 1863 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 9, plug C, pin 2, plug C, pin 16, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 9, plug C, pin 2, plug C, pin 16, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 9 and servo motor plug, pins 1, 2, 3, 5 Between plug C, pin 2 and servo motor plug, pins 1,2, 3, 6 Between plug C, pin 16 and servo motor plug, pins 1,3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 9 and servo motor plug, pin 6 Plug C, pin 2 and servo motor plug, pin 5 Plug C, pin 16 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1863 is not entered --> EndFault code 1863 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1864 is not entered --> EndFault code 1864 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 16, plug B, pin 17, plug C, pin 13, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 16, plug B, pin 17, plug C, pin 13, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 16 and servo motor plug, pins 1, 2, 3, 6 Between plug B, pin 17 and servo motor plug, pins 1,2, 3, 5 Between plug C, pin 13 and servo motor plug, pins 1,3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 16 and servo motor plug, pin 5 Plug B, pin 17 and servo motor plug, pin 6 Plug C, pin 13 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1864 is not entered --> EndFault code 1864 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1867 is not entered --> EndFault code 1867 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 14, plug B, pin 15, plug C, pin 14, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 14, plug B, pin 15, plug C, pin 14, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 14 and servo motor plug, pins 1,2, 3, 5 Between plug B, pin 15 and servo motor plug, pins 1,2, 3 and 6 Between plug C, pin 14 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 14 and servo motor plug, pin 6 Plug B, pin 15 and servo motor plug, pin 5 Plug C, pin 14 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1867 is not entered --> EndFault code 1867 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1868 is not entered --> EndFault code 1868 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear right temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 12, plug B, pin 13, plug C, pin 15, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 12, plug B, pin 13, plug C, pin 15, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 12 and servo motor plug, pins 1,2, 3, 5 Between plug B, pin 13 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 15 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 12 and servo motor plug, pin 6 Plug B, pin 13 and servo motor plug, pin 5 Plug C, pin 15 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 1868 is not entered --> EndFault code 1868 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2100 is not entered --> EndFault code 2100 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs A, C and E from air-conditioning system regulator and plug from footwell flap servo motor Pull off plug 4 (disconnection point Climatronic) Switch on ignition Measure respective voltage between ground and: Plug E, pins 1 and 8, plug A, pins 11, 21 and 22< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug E, pins 1, 8, plug A, pins 11, 21 and 22Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6 Between plug E, pin 8 and servo motor plug, pins 1, 2, 5,6 Between plug A, pin 11 and servo motor plug, pins 1, 3, 5, 6 Between plug A, pin 21 and servo motor plug, pins 1,2, 3, 5Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3 Plug A, pin 11 and servo motor plug, pin 2 Plug A, pin 21 and servo motor plug, pin 6 Plug A, pin 22 and servo motor plug, pin 5< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A and E on air-conditioning system regulator Connect servo motor plug A Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2100 is not entered --> EndFault code 2100 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control unit
Work instructionDisplay okay.If not OK
0Find out which air conditioning system is installed2-zone air conditioning system Go to Step 1Manual air conditioning Refer to " SERVO MOTOR FOR FRONT AIR DISTRIBUTION "
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2101 is not entered --> EndFault code 2101 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wiring between control unit and servo motor for short circuit to B+Switch off ignition Pull off plug 4 (disconnection point Climatronic) Remove plugs A, C and E from air-conditioning system regulator and plug from servo motor for side vents Switch on ignition Measure respective voltage between ground and: Plug A, pin 23, plug A, pin 24, plug C, pin 5, plug E, pin 1, plug E, pin 8< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wiring between control unit and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug A, pin 23, plug A, pin 24, plug C, pin 5, plug E, pin 1, plug E, pin 8Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug A, pin 23 and servo motor plug, pins 1,2, 3, 5 Between plug A, pin 24 and servo motor plug, pins 1,2, 3, 6 Between plug C, pin 5 and servo motor plug, pins 1, 3, 5, 6 Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control unit and servo motor for open circuitMeasure resistance between plug C, pin 5 and servo motor plug, pin 2 Plug A, pin 23 and servo motor plug, pin 6 Plug A, pin 24 and servo motor plug, pin 5 Plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plugs A, C and E on air-conditioning system regulator Push on plug 4 (disconnection point Climatronic) Push plug on servo motor Switch on ignition Measure voltage between pins 1 and 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As a test, replace the servo motor for the left side vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2101 is not entered --> EndFault code 2101 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems
Work instructionDisplay OKIf not OK
1Check line for short circuit to B+Switch off ignition Pull off blower regulator plug B Remove plug C of the air-conditioning system regulator Switch on ignition Measure voltage between plug C, pin 8 and ground< 0.3 V Go to Step 2Repair/replace wire --> End
2Check line for short circuit to groundMeasure resistance between plug C, pin 8 and groundInfinity ohms Go to Step 3Repair/replace wire --> End
3Check line for open circuitMeasure resistance between plug C, pin 8 and blower regulator plug B, pin 1< 5 ohms Go to Step 4Repair/replace wire --> End
4As an experiment, replace the blower regulator, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2193 is not entered --> EndFault code 2193 is entered again Go to Step 5
5Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Manual air conditioning
Work instructionDisplay OKIf not OK
1Check line for short circuit to B+Switch off ignition Pull off blower regulator plug B Pull off air conditioning system regulator plug A Switch on ignition Measure voltage between plug A, pin 17 and ground< 0.3 V Go to Step 2Repair/replace wire --> End
2Check line for short circuit to groundMeasure resistance between plug A, pin 17 and groundInfinity ohms Go to Step 3Repair/replace wire --> End
3Check line for open circuitMeasure resistance between plug A, pin 17 and blower regulator plug B, pin 1< 5 ohms Go to Step 4Repair/replace wire --> End
4As an experiment, replace the blower regulator, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2193 is not entered --> EndFault code 2193 is entered again Go to Step 5
5Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Check line for short circuit to B+Switch off ignition Remove plug B of the rear air-conditioning system regulator Pull off rear blower regulator plug B Switch on ignition Measure voltage between pin 1 of air-conditioning system regulator plug B and ground< 0.3 V Go to Step 2Repair/replace wire --> End
2Check line for short circuit to groundMeasure resistance between pin 1 of air-conditioning system regulator plug B and groundInfinity ohms Go to Step 3Repair/replace wire --> End
3Check line for open circuitMeasure resistance between pin 1 of plug B on air-conditioning system regulator and blower regulator plug B, pin 1< 5 ohms Go to Step 4Repair/replace wire --> End
4As an experiment, replace the blower regulator, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory again> EndGo to Step 5
5Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS .> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2379 is not entered --> EndFault code 2379 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Pull off plug 4 (disconnection point Climatronic) Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for left side vents Switch on ignition Measure respective voltage between ground and: Plug A, pin 23, plug A, pin 24, plug C, pin 5, plug E, pin 1, plug E, pin 8< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug A, pin 23, plug A, pin 24, plug C, pin 5, plug E, pin 1, plug E, pin 8Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug A, pin 23 and servo motor plug, pins 1,2, 3, 5 Between plug A, pin 24 and servo motor plug, pins 1, 2, 3, 6 Between plug C, pin 5 and servo motor plug, pins 1, 3, 5, 6 Between plug E, pin 1 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug C, pin 5 and servo motor plug, pin 2 Plug A, pin 23 and servo motor plug, pin 6 Plug A, pin 24 and servo motor plug, pin 5 Plug E, pin 1 and servo motor plug, pin 1 Plug E, pin 8 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check the servo motor power supplyPush plugs A, C and E on air-conditioning system regulator Push on plug 4 (disconnection point Climatronic) Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor for the left side vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2379 is not entered --> EndFault code 2379 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2380 is not entered --> EndFault code 2380 is entered Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Pull off plug 4 (disconnection point Climatronic) Remove plugs A, B, C and E from air-conditioning system regulator and plug from servo motor for right side vents Switch on ignition Measure respective voltage between ground and: Plug B, pin 1, plug B pin 5, plug B, pin 9, plug E, pin 1, plug E, pin 8< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 1, plug B pin 5, plug B, pin 9, plug E, pin 1, plug E, pin 8Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 1 and servo motor plug, pins 1,2, 3, 5 Between plug B, pin 5 and servo motor plug, pins 1, 3, 5, 6 Between plug B, pin 9 and servo motor plug, pins 1, 2, 3, 6 Between plug E, pin 1 and servo motor plug, pins 1,2, 5,6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 1 and servo motor plug, pin 6 Plug B, pin 5 and servo motor plug, pin 2 Plug B, pin 9 and servo motor plug, pin 5 Plug E, pin 1 and servo motor plug, pin 3 Plug E, pin 8 and servo motor plug, pin 1< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plugs B and E on air-conditioning system regulator Push on plug 4 (disconnection point Climatronic) Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the servo motor for the right side vents, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2380 is not entered --> EndFault code 2380 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on air-conditioning system regulator control module
  1. 2-zone and 4-zone air conditioning systems
Work instructionDisplay OKIf not OK
1Check line for short circuit to B+Switch off ignition Remove plug C from air-conditioning system regulator Switch on ignition Measure voltage between plug C, pin 14 and ground< 0.3 V Step 2Repair/replace wiring harness
2Check line for short circuit to groundMeasure resistance between plug C, pin 14 and groundInfinity ohms Go to Step 3Repair/replace wiring harness
3Check line for open circuitMeasure resistance between air-conditioning system regulator plug C, pin 14 and relay socket (V8 naturally-aspirated engine --> relay socket 4; V8 Turbo and V6 --> relay socket 8) pin C.< 5 ohms Go to Step 4Repair/replace wiring harness
4As an experiment, replace relay, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2507 is not entered --> EndFault code 2507 is entered Go to Step 5
5Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Manual air conditioning
Work instructionDisplay OKIf not OK
1Check line for short circuit to B+Switch off ignition Pull off air conditioning system regulator plug A Disconnect relay' relay socket 8, relay box to the right' Switch on ignition Measure voltage between plug A, pin 18 and ground< 0.3 V Step 2Repair/replace wiring harness
2Check line for short circuit to groundMeasure resistance between plug A, pin 18 and groundInfinity ohms Go to Step 3Repair/replace wiring harness
3Check line for open circuitMeasure resistance between plug A, pin 18 and relay socket pin C.< 5 ohms Go to Step 4Repair/replace wiring harness
4As an experiment, replace relay, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2507 is not entered --> EndFault code 2507 is entered Go to Step 5
5Replace control module> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Internal function test on air-conditioning system regulator control module
  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2597 is not entered --> EndFault code 2597 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 9, plug C, pin 2, plug C, pin 16, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 9, plug C, pin 2, plug C, pin 16, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 9 and servo motor plug, pins 1, 2, 3, 5 Between plug C, pin 2 and servo motor plug, pins 1,2, 3, 6 Between plug C, pin 16 and servo motor plug, pins 1,3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 9 and servo motor plug, pin 6 Plug C, pin 2 and servo motor plug, pin 5 Plug C, pin 16 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2597 is not entered --> EndFault code 2597 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2598 is not entered --> EndFault code 2598 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 16, plug B, pin 17, plug C, pin 13, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 16, plug B, pin 17, plug C, pin 13, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 16 and servo motor plug, pins 1, 2, 3, 6 Between plug B, pin 17 and servo motor plug, pins 1,2, 3, 5 Between plug C, pin 13 and servo motor plug, pins 1,3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 16 and servo motor plug, pin 5 Plug B, pin 17 and servo motor plug, pin 6 Plug C, pin 13 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2598 is not entered --> EndFault code 2598 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2599 is not entered --> EndFault code 2599 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear left temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 14, plug B, pin 15, plug C, pin 14, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 14, plug B, pin 15, plug C, pin 14, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 14 and servo motor plug, pins 1,2, 3, 5 Between plug B, pin 15 and servo motor plug, pins 1,2, 3 and 6 Between plug C, pin 14 and servo motor plug, pins 1, 3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 14 and servo motor plug, pin 6 Plug B, pin 15 and servo motor plug, pin 5 Plug C, pin 14 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2599 is not entered --> EndFault code 2599 is entered again go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

  1. Ignition on
  2. Battery voltage OK (11.4 to 14.5 V)
  3. Internal function test completed on rear air-conditioning system regulator control module
Work instructionDisplay OKIf not OK
1Carry out calibration using the 9588 Porsche System Tester II, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2600 is not entered --> EndFault code 2600 is entered again Go to Step 2
2Perform visual inspectionCheck flap for stiff operation Check plug contacts and peripheral equipment for signs of damageGo to Step 3Repair component(s)
3Check wires between control module and servo motor for short circuit to B+Switch off ignition Remove plugs B, C and D from air-conditioning system regulator and plug from servo motor for rear right temperature valve Switch on ignition Measure respective voltage between ground and: Plug B, pin 12, plug B, pin 13, plug C, pin 15, plug D, pin 3, plug D, pin 7< 0.3 V Go to Step 4Repair/replace wiring harness --> End
4Check wires between control module and servo motor for short circuit to groundSwitch off ignition Measure respective resistance between ground and: Plug B, pin 12, plug B, pin 13, plug C, pin 15, plug D, pin 3, plug D, pin 7Infinity ohms Go to Step 5Repair/replace wiring harness --> End
5Check for short circuit between linesDisconnect plugs on all servo motors Measure resistance between individual lines from air-conditioning system regulator and servo motor Between plug B, pin 12 and servo motor plug, pins 1, 2, 3, 5 Between plug B, pin 13 and servo motor plug, pins 1,2, 3, 6 Between plug C, pin 15 and servo motor plug, pins 1,3, 5, 6 Between plug D, pin 3 and servo motor plug, pins 2, 3, 5, 6Infinity ohms Go to Step 6Repair/replace wiring harness --> End
6Check wiring between control module and servo motor for open circuitMeasure resistance between plug B, pin 12 and servo motor plug, pin 6 Plug B, pin 13 and servo motor plug, pin 5 Plug C, pin 15 and servo motor plug, pin 2 Plug D, pin 3 and servo motor plug, pin 1 Plug D, pin 7 and servo motor plug, pin 3< 5 ohms Go to Step 7Repair/replace wiring harness --> End
7Check internal resistance of servo motorMeasure resistance between pins 1 and 3 of servo motorApprox. 5 kohms Go to Step 8Go to Step 9
8Check servo motor power supplyPush plug D on the air-conditioning system regulator Push plug on servo motor Switch on ignition Measure voltage between pin 1 and pin 3 of servo motor plugApprox. 5 V Go to Step 9Go to Step 10
9As an experiment, replace the left temperature valve servo motor, then: Erase fault memory Satisfy diagnostic conditions Read out fault memory againFault code 2600 is not entered --> EndFault code 2600 is entered again Go to Step 10
10Replace air-conditioning system regulator> End

DIAGNOSIS/TROUBLESHOOTING CHART

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