| Author | Message | ||
     TONY RINALDO (Tony) New Member Username: Tony Post Number: 1 Registered: 01-2004 |
HELLO,WE HAVE A 97 RR WITH @65K ON THE CLOCK AND A RECENT SALVAGE ENGINE DUE TO A CATASTROPHIC LOWER END FAILURE AT 70MPH ON THE INTERSTATE.AFTER THE ENIGINE INSTALLATION WE NOW HAVE A FEW FAULTS THAT WE CANNOT RESOLVE.THE GEMS SYSTEM IS REGISTERING "FMFR AT MAX NEGATIVE VALUE",USUALLY CAUSED BY A RICH BURN CONDITION. ALSO WE HAVE GEARBOX FAULTS WHICH ARE "THROTTLE ANGLE DATA INVALID" AND "ENGINE TORQUE FAULT".THE ENGINE SEEMS TO RUN FINE ,BUT THE TRANSMISSION IS STUCK IN WHAT SEEMS TO BE "SPORT MODE" AND SHIFTS UP AND DOWN VERY HARD.WE HAVE CHANGED PLUGS,PLUG WIRES,MAF SENSOR,TPS, INJECTORS,AND CRANK SENSOR AND ALSO THE AUTOBOX ECU, ANY HELP ON THIS SUBJECT WOULD BE GREAT, THANKS AGAIN, TONY R. | ||
| J E Robison Service Co (Robisonservice) Member Username: Robisonservice Post Number: 142 Registered: 10-2002 |
No "quick fix" comes to mind for your situation. I suggest you find a shop with proper diagnostic equipment for the vehicle. With that we can read things like the engine torque signal and the throttle angle in real time and compare them to what's happening. I don't think you can do that with a generic scanner. Without more test results anything else is going to be a guess. I don't know where you are located - we are probably one of the biggest independent LR specialists (we're in MA). There are a number of independenets with proper equipment and of course all dealers have it. The other issue is finding a place that has people with the skills to solve problems like this. | ||
| J E Robison Service Co (Robisonservice) Member Username: Robisonservice Post Number: 144 Registered: 10-2002 |
I had originally responded that you need to take this truck somewhere with proper training and tools. I forgot that Land Rover had a service note relating to the throttle angle issue. Here is the gist of it: Discovery Series II, Range Rover (LP) from 1999 model year w/ Bosch Motronic M5.2.1 EMS Throttle/Torque signal output circuit fault P1663 Throttle angle / Torque signal (power stage) Drive cycle A:Signal missing. P1664 Throttle angle / Torque signal (power stage) Drive cycle A:Signal out of range - below minimum. P1665 Throttle angle / Torque signal (power stage) Drive cycle A:Signal out of range - above maximum. Possible causes: Short circuit C636/29 (SP) to vehicle +12V. Short circuit C636/29 (SP) to vehicle earth. Open circuit C504/10 (SP) to C636/29 (SP). Connector(s) C504,ECM C636 (B). Faulty ABS ECU. Faulty ECM. 1. Short circuit C636/29 (SP) to vehicle +12V. SHORT_CIRCUIT Check resistance < 5.0§Ù 2. Short circuit C636/29 (SP) to vehicle earth. OPEN_CIRCUIT Check resistance > 1M§Ù 3. Open circuit C504/10 (SP) to C636/29 (SP). OPEN_CIRCUIT Check resistance > 1M§Ù 4. Connector(s) C504,ECM C636 (B). CONNECTOR Check for connector not correctly latched, backed out pins, damaged pins, corroded pins 5. Faulty ABS ECU. CHECK THE FOLLOWING: Eliminate any possible harness or connector faults. Check ABS ECU by substituting a known good unit. POSSIBLE FAULTS ABS ECU Faulty 6. Faulty ECM. CHECK THE FOLLOWING: Eliminate all other fault possibilities before suspecting the ECM. Failure of this component is unlikely. Check ECM by substituting a known good unit. POSSIBLE FAULTS ECM Faulty |
