Generators & Regulators: Other Porsche Cayenne I

BELT TENSION

Serpentine belt tension is automatically adjusted by tensioner and no adjustment is required.

DRIVE BELT ROUTING

Serpentine belt is self-adjusting. (Scheme 16)or see scheme 2.

Scheme 16

SERVICE PRECAUTIONS

The following precautionary measures must be taken before disconnecting or total discharge of the battery or serious electrical damage can occur

1. Never disconnect battery with engine running.
2. Ensure battery is securely connected before starting.
3. Do not use a boost charger to start engine.
4. When jump starting use jumper cables with overvoltage protection.
5. Always disconnect the battery before performing any welding.
6. Turn ignition to OFF position. Wait one minute before disconnecting negative lead.
7. Always disconnect negative lead first. When reconnecting battery connect negative lead last.
8. Before beginning testing, perform «PRELIMINARY INSPECTION»(ref-165253-S38942377332004082300000) .

BATTERY DISCONNECT PRECAUTIONS

After disconnecting battery or replacing ECM, drive vehicle to enable ECM to relearn driveability. Inform your customer that they may experience driveability different from what they are accustomed to until ECM completes relearn function.

Ready Status

After battery is disconnected and reconnected, The "Ready Status" must be obtained following a test drive or using a Porsche System Tester (or equivalent aftermarket scan tool).

Idle Relearn

After disconnecting the power supply, the idle speed might change or fluctuate briefly until the throttle adjusting unit readapts. The mixture adaption is also lost.

To readapt the DME control unit (PCM), perform the following procedure

1. Turn ignition on, with engine off for 30 seconds. Do NOT touch accelerator pedal. This completes the adaption of the throttle adjusting unit.
2. The engine must run for several minutes before the PCM can relearn the idle speed and mixture adaption values.

Tire Pressure Monitoring

Tire pressure monitoring values will be lost after the battery is disconnected. After reconnecting the battery, drive the vehicle for a short distance. The actual tire pressures will start to display again.

Steering Angle Sensor

The steering angle sensor must be re-initialized after battery is disconnected and connected.

1. Turn steering wheel to straight ahead position.
2. Turn ignition off then on again twice (do not start the engine yet).
3. Start engine.
4. From the straight-ahead position, turn steering wheel about 20 degrees to the left and 20 degrees to the right (past the straight-ahead position).
5. Drive the vehicle straight ahead for at least one second at a speed above 2.5 MPH.
6. The stored fault code in the Porsche Stability Management (PSM) control unit should now be cleared automatically. The PSM indicator light in the instrument cluster should now go out.

Sliding Roof Electric Motor

The sliding roof limit positions are lost when battery is disconnected and connected. To restore settings, turn ignition on (engine off) and press the rocker switch upwards. The roof opens and closes completely. The limit positions are now stored in the control unit.

Power Windows

The limit positions of the power windows are deleted from the control unit when the battery is disconnected and connected.

To restore the settings, manually close each power window as far as it will go. Open it completely, and then press the rocker switch for closing the window again. The power window limit positions are now stored in the control unit.

Supply Voltage Fault Entry

A "supply voltage" entry may be stored in various electronic control units if the battery is completely discharged. This will have to erased from fault memory using a scan tool.

LOCK MOUNT

Note. Servicing generator as well as other components located at front of engine compartment is made easier by moving lock mount into service position.

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Scheme 21

1. Remove front spoiler. See «FRONT SPOILER»(ref-165253-S04383420282004082700000).
2. Remove front lid seal. (Scheme 21)
3. Disconnect front lid lock cable. see scheme 22
4. Remove rubber covers (1) and (2), inset circle No. 1. see scheme 23
5. On Turbo models only, remove side air guides.Disconnecting air sensor harness connector (14), inset circle No. 2. see scheme 23 Slide air guide (15) outwards to remove.
6. On all models, remove lock mount fastening screws (3), inset circle No. 3. see scheme 23
7. Install lock mount service mount bolts (4), inset circle No. 4. No bolt size is given by manufacturer, but bolts provide support for lock mount as it is moved into service position.
8. Remove lock mount fastening screws (5), inset circle No. 5. see scheme 23
9. Remove lock mount fastening screws (6 and 7), inset circle No. 6. see scheme 24
10. Release air intake guides (8) at air filter, inset circle No. 7. see scheme 24
11. Disconnect in-line harness connector (9), inset circle No. 8. see scheme 24
12. On Turbo models only, remove charge air cooler (intercooler) mount screws (16), inset circle No. 8. see scheme 24 Remove spacers (17).
13. On all models, remove front spoiler guide rails. See «FRONT SPOILER»(ref-165253-S04383420282004082700000).
14. Pull lock mount into service position, inset circle No. 10. see scheme 24 To prevent damage to the headlights and accessories pull lock mount forward on both sides by an equal mount.
15. To secure lock mount, reverse procedure. When tightening lock mount mounting bolts match existing marks on frame rails and body. Tighten lock mount bolts to specification. See «TORQUE SPECIFICATIONS»(ref-165253-S17894539272004082300000). Connect and check function of front lid lock cable. see scheme 25