Welcome to RennTech.org Community, Guest
There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.
Here are some of the features available - once you register at RennTech.org
- View Classified Ads
- DIY Tutorials
- Porsche TSB Listings (limited)
- VIN Decoder
- Special Offers
-
OBD II P-Codes - Paint Codes
- Registry
- Videos System
- View Reviews
- and get rid of this welcome message
It takes just a few minutes to register, and it's FREE
Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)
- No ads - advertisements are removed
- Access the Contributors Only Forum
- Contributing Members Only Downloads
- Send attachments with PMs
- All image/file storage limits are substantially increased for all Contributing Members
- Option Codes Lookup
- VIN Option Lookups (limited)
Farhad12345
-
Posts
2 -
Joined
-
Last visited
Content Type
Profiles
Events
Forums
External Paint Colors
Downloads
Tutorials
Links Directory
Collections
Store
Posts posted by Farhad12345
-
-
Hi gbratik,
Here is the step by step instructions on how to fix this problem.
FAULT CODE 0778
STEERING-ANGLE SENSOR
CAUTION: The steering-angle sensor must always be initialized 'control lamp on'
whenever the battery terminal is disconnected.
Diagnostic conditions
Ignition on
Internal level control module function test
Possible cause of fault
Initialization/calibration not performed (no display/no or incorrect basic setting/adaptation)
Mechanical fault
The signal received from the control module (level control) via the CAN drive does not correspond to the
expected signal (implausible signal)
CAN drive faulty (no signal/communication)
Steering-angle sensor faulty
Affected pins
Level control module, plug A:
Pin 61 'CAN drive (high)'
Pin 81 'CAN drive (low)'
DIAGNOSIS/TROUBLESHOOTING
Initializing
The steering-angle sensor in Cayenne must be initialized after the following work is carried out:
Whenever the power supply is interrupted (NRA control lamp on).
The steering-angle sensor must be calibrated after all work on the running gear.
NOTE: Calibration of the steering-angle sensor must be performed on a measuring platform. First, the level control module must be coded successfully and the
steering-angle sensor must be initialized. The steering-angle sensor must be
calibrated after work has been carried out on the running gear in the area of the
front axle.
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
1. Initialize steering-angle sensor
Switch on ignition.
Position wheels straight ahead.
From the straight-ahead position, turn the steering wheel approx. '15°' to the left and '15°' to the right (past the straight-ahead position).
Drive the vehicle straight ahead at a speed of '> 4 km/h for at least 1 second
IF DISPLAY OK After successful initialization, the stored fault code is erased from the fault memory and the NRA control lamp goes out.
IF NOT OK go to step 2
2. Check steeringangle sensor calibration using 9588 Porsche System Tester II
Running gear set according to Porsche specifications.
Wheels in straight-ahead position and steering wheel horizontal.
Steering wheel may be turned by max. '± 2.0°' from the horizontal position for driving straight ahead.
IF DISPLAY OK After successful calibration, the stored fault code is erased from the fault memory.
IF NOT OK go to step 3
3. Mechanical fault
Examine moving parts for damage and check mobility.
IF DISPLAY OK go to step 4
IF NOT OK The steering-angle sensor is integrated into the steering column switch and must be replaced along with this if its functionality is mechanically impaired.
4. Read out steering column switch control module, fault memory and check circuit for short or open circuit
Eliminate faults in accordance with 'Diagnosis/troubleshooting' for steering column switch control module.
If electric circuit is OK go to Step 5
IF NOT OK Repair wiring harness circuit.
5. Check CAN drive
Localize faults in accordance with CHECKING INSTRUCTIONS/CAN DATABUS
If CAN drive is OK go to step 6
IF NOT OK repair wiring harness.
6. Replace steering-angle sensor
The steering-angle sensor can only be replaced together with the steering column switch.
IF NOT OK go to step 7
7. Replace level control module
That`s it.
Hope it will help.
Cayenne Service Manual
in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
Posted
Hi,
I think comprehensive Porsche Workshop Service manual is 9700 pages. Other manuals could be incomplete and missing most informative features like wiring diagrams and etc.