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Additional Heating: Other Porsche Cayenne I рестайлинг

Heater 5 illustrations ~1312 words

General instructions/safety instructions

The following points must be observed during vehicle diagnosis

  1. After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
  2. After troubleshooting or repairs, erase the fault memory with the 9588 Porsche System Tester II and carry out a test drive.
  3. After the test drive, read out the fault memory with the 9588 Porsche System Tester II again.
WARNINGDanger! Danger of injury through triggering of driver's airbag Never hang the 9588 Porsche System Tester II over the steering wheel.
CAUTIONDanger! Risk of fire and explosion.
  1. When operating auxiliary heater in fire and explosion endangered areas.
  2. When working on the fuel system, the respective applicable safety regulations must be observed.
WARNINGDanger! Danger of poisoning, suffocation Do not operate the auxiliary heater in closed rooms without exhaust extraction system.
WARNINGDanger of injury and damage due to unusual vehicle handling when plugs or components are disconnected! Never disconnect plugs when the vehicle is in motion or drive the vehicle with plugs disconnected. Drive only with all parts fully installed and connected.
WARNINGDanger of personal injury from moving vehicle independently with gear engaged and engine running! Before starting the engine in a vehicle with manual transmission, take the vehicle out of gear and put the handbrake on firmly. Before starting the engine in a vehicle with automatic transmission, move the selector lever to position 'P' and put the handbrake on firmly.
CAUTIONDanger of damage due to improper handling of batteries and control module plug connections! Never disconnect battery with engine running Never start engine if battery terminal clamps are not connected securely Never puff off or push on plug connections for the control modules or other electronic components when the ignition is switched on. Always disconnect the negative terminal of the battery and pull off all plug connections to the vehicle electrical system control module when carrying out welding work on the vehicle

Fault code setting conditions

Fault codes can be set in several circumstances, e.g.

  1. battery disconnected
  2. plug connections disconnected
  3. faulty coding
  4. power failure
  5. etc.

In these circumstances, no fault is present in the system and the fault memory must be erased.

Possible causes of fault

Note. The 'possible causes of fault' that are responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and erase any faults.

Fault type

The following fault types are possible

  1. no display
  2. upper limit value exceeded
  3. lower limit value not reached
  4. no signal/communication
  5. short circuit to B+
  6. short circuit to ground
  7. implausible signal
  8. open circuit/short circuit to ground
  9. open circuit/short circuit to B+
  10. open circuit
  11. electrical fault in electric circuit
  12. please read out fault memory
  13. faulty

Fault status

The following status types are possible

  1. present
  2. not present

This information should be saved using the Save key [F4] and printed out.

Note. Visual inspection: During troubleshooting, please check first that the affected pins on the wiring harness plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.

Note. Battery voltage and signals: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided if necessary. Both signals and voltages as well as components or fuses (input side) must be guaranteed on the vehicle electrical system.

Note. Specified resistance values are based on an ambient temperature of 20°C.

Auxiliary heater tools

WARNINGDanger of personal injury while driving with special tools Never hang the Porsche System Tester II No. 9588 over the steering wheel

Note. Plug contacts are optimally designed to suit the plug system. Operations on pins can cause contact problems. Always use suitable measurement tools, adapter plugs and test cable.

Identifying Battery Charging Device. Scheme 1

Scheme 1: Identifying Battery Charging Device
Scheme 1: Identifying Battery Charging Device

Identifying Porsche System Tester II (9588). Scheme 2

Scheme 2: Identifying Porsche System Tester II (9588)
Scheme 2: Identifying Porsche System Tester II (9588)

Identifying Commercially Available Digital Multimeter. Scheme 3

Scheme 3: Identifying Commercially Available Digital Multimeter
Scheme 3: Identifying Commercially Available Digital Multimeter

Identifying Measurement Tool Set (9684). Scheme 4

Scheme 4: Identifying Measurement Tool Set (9684)
Scheme 4: Identifying Measurement Tool Set (9684)

Identifying Auxiliary Heater Component Arrangement. Scheme 5

Scheme 5: Identifying Auxiliary Heater Component Arrangement
Scheme 5: Identifying Auxiliary Heater Component Arrangement

Possible cause of fault

  1. Auxiliary heater control unit faulty
  1. Open circuit in CAN Infotainment (no signal/communication)
  2. Auxiliary heater control unit faulty

Affected pins

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Fuel quantity in vehicle tank on Reserve (< 12 litres)
  2. Open circuit in CAN Infotainment (no signal/communication)
  3. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Open circuit in CAN Infotainment (no signal/communication)
  2. Implausible signal
  3. Electrical fault in electric circuit (plug contact problem)
  4. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Above upper limit (vehicle electrical system voltage, terminal 30 with engine running over 15.8 V)
  2. Auxiliary heater control unit faulty

Plug B for auxiliary heater control unit

  1. Pin 1 'terminal 30'
  2. Pin 2 'terminal 31'
  1. Open circuit in CAN Infotainment (no signal/communication)
  2. Implausible signal
  3. Electrical fault in electric circuit (plug contact problem)
  4. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Electrical fault in electric circuit (plug contact problem)
  2. Short circuit to ground
  3. Short circuit to B+
  4. Open circuit in wiring
  5. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 4 '3/2-way valve output'

Plug on 3/2-way valve

  1. Pin 1 '3/2-way valve input'
  2. Pin 2 'terminal 31'

Communication problem with the Gateway control unit.

  1. No signal/communication

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Open circuit in CAN Infotainment (no signal/communication)
  2. Electrical fault in electric circuit (plug contact problem)
  3. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'

Communication problem with all control modules via CAN Infotainment.

  1. CAN Infotainment is faulty
  2. No signal/communication

Plug A for auxiliary heater control unit

  1. Pin 2 'CAN Infotainment (high)'
  2. Pin 3 'CAN Infotainment (low)'
  1. Electrical fault in electric circuit (plug contact problem)
  2. Fuel deficiency (e.g. when the auxiliary heater was not switched on for a longer period)
  3. Fuel lines leak (before or after the metering pump)
  4. Interruption in fuel lines
  5. Metering pump does not function
  1. Electrical fault in electric circuit (plug contact problem)
  2. Fuel lines leak (before or after the metering pump)
  3. Interruption in fuel lines
  4. Flame monitor does not function
  5. Fuel tank fuel level at reserve

Undervoltage cutout (internal)

Note. The 'internal' threshold can be modified using the 9588 Porsche System Tester II in the 'Coding' menu item under 'Threshold'.

Note. Using the 9588 Porsche System Tester II, the menu item 'Coding' under 'Undervoltage cutout' can be switched to the value 'external' (12.2 V).

  1. Voltage limit value not reached (< 9.6 V)
  2. Electrical fault in electric circuit (plug contact problem)
  3. Open circuit in wiring
  4. Auxiliary heater control unit faulty

Connector B

  1. Pin 1 'terminal 30'
  2. Pin 2 'terminal 31'
  1. Electrical fault in electric circuit (plug contact problem)
  2. Fuel lines leak (before or after the metering pump)
  3. Interruption in fuel lines
  4. Auxiliary heater control unit faulty
  1. Upper temperature limit value exceeded (>88°C (190°F))
  2. Circulating pump faulty
  3. Water temperature sensor faulty
  4. Auxiliary heater control unit faulty
  1. Implausible signal
  2. Glow pin faulty
  3. Auxiliary heater control unit faulty
  1. Electrical fault in electric circuit (plug contact problem)
  2. Short circuit to ground
  3. Short circuit to B+
  4. Open circuit in wiring
  5. Auxiliary heater control unit faulty

Plug A for auxiliary heater control unit

  1. Pin 6 'output for metering pump'

Metering pump plug

  1. Pin 2 'input for metering pump'
  2. Pin 1 'terminal 31'
  1. Line from air filter to combustion air blower blocked
  2. Short circuit to ground
  3. Short circuit to B+
  4. Open circuit in wiring
  5. Auxiliary heater control unit faulty
  1. Electrical fault in electric circuit (plug contact problem)
  2. Open circuit in wiring
  3. Auxiliary heater control unit faulty

Undervoltage cutout (external)

Note. Using the 9588 Porsche System Tester II, the menu item 'Coding' under 'Undervoltage cutout' can be switched to the value 'internal'.

  1. Lower limit value (< 11.6 V) not reached via CAN Infotainment
  2. Auxiliary heater control unit faulty
  1. Upper limit value exceeded (>4.8V)
  2. Open circuit in wiring (<0.16V)
  3. Auxiliary heater control unit faulty
  1. Electrical fault in electric circuit (plug contact problem)
  2. Short circuit to ground
  3. Short circuit to B+
  4. Open circuit in wiring
  5. Auxiliary heater control unit faulty
  1. Coding of engine version in auxiliary heater control unit does not correspond to coding via CAN Infotainment or gateway.
  2. Auxiliary heater control unit faulty
  1. Open circuit from radio remote control receiver to auxiliary heater control unit
  2. Implausible signal
  3. Electrical fault in electric circuit (plug contact problem)
  4. Hand-held transmitter faulty
  5. Antenna faulty
  6. Receiver faulty
  7. Auxiliary heater control unit faulty

Plug A radio remote control receiver

  1. Pin 2 'output for radio remote control receiver'

Plug A for auxiliary heater control unit

  1. Pin 1 'input for auxiliary heater control unit'
  1. No display in air-conditioning control unit display
  2. The same fault has happened 3 times or 5 different faults have happened in succession
  3. Auxiliary heater control unit faulty
  1. After voltage interruption and recurrent voltage
  2. Auxiliary heater control unit faulty

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