I just had the interior out of my '97 to install the insulation kit, while it was out and I had the Electronic Suspension Control Module out to remove the rear carpet my battery went dead and I used a charger to get the car started. After reinstalling everything and putting in a new battery I now get a code P1571 H, also during diagnostic it shows 38 RTD No Comm. When insterting the key I get shocks inoperative, Service Ride Control, Service Vehicle Soon and Maximum speed 80MPH. Hitting the reset does not clear the codes. Is there anyway to eliminate these codes.

 

Sounds like you didnt plug something back properly. The wires in the console area are small and easily damaged! Been there. I recommend that you remove the selector switch, wxamine all of the wires, connectors and look for bent pins, cut/chaffed wires ect.

Please let us know how you make out

Bill C

 

Took everything apart and checked, all the wires look good and the connections seem to be tight. Still have the problems.

 

38-RTD - Real Time Damping You should have another code with this one. Here's the list:
C1650 ESC Module Malfunction
· C1658 EEPROM Calibration Malfunction
· C1710 LF Shock Absorber Solenoid (Short to Voltage)
· C1711 LF Shock Absorber Solenoid (Short to GND)
· C1712 LF Shock Absorber Solenoid (Open Circuit)
· C1715 RF Shock Absorber Solenoid (Short to Voltage)
· C1716 RF Shock Absorber Solenoid (Short to GND)
· C1717 RF Shock Absorber Solenoid (Open Circuit)
· C1720 LR Shock Absorber Solenoid (Short to Voltage)
· C1721 LR Shock Absorber Solenoid (Short to GND)
· C1722 LR Shock Absorber Solenoid (Open Circuit)
· C1725 RR Shock Absorber Solenoid (Short to Voltage)
· C1726 RR Shock Absorber Solenoid (Short to GND)
· C1727 RR Shock Absorber Solenoid (Open Circuit)
· C1743 Loss of Vehicle Speed Signal
· C1760 LF Position Sensor (Out of Range)
· C1761 RF Position Sensor (Out of Range)
· C1762 LR Position Sensor (Out of Range)
· C1763 RR Position Sensor (Out of Range)
· C1768 Position Sensor Supply Malfunction (Overcurrent)
· C1780 Loss of Steering Position Signal
· C1786 RTD Control Relay Malfunction
· C1787 RTD Control Relay Circuit (Open or Short to GND)
· C1788 RTD Control Relay Circuit (Short to Voltage)
· C1790 Ride Control Switch (Out of Range)
· C1791 Ride Control Switch (Contact Malfunction

P1571 ASR Desired Torque But the H means history. So that's not the reult of your current mod.

Apparently you've got a bad connection.

Bob

 

On the 38-RTD there is no code, after the 38 RTD it says NO COMM

 

On the 38-RTD there is no code, after the 38 RTD it says NO COMM. And everytime I erase the P1571 code and then restart the car the code returns.

 

On the 38-RTD there is no code, after the 38 RTD it says NO COMM. And everytime I erase the P1571 code and then restart the car the code returns.

 

On the 38-RTD there is no code, after the 38 RTD it says NO COMM. And everytime I erase the P1571 code and then restart the car the code returns.

 

No Comm would mean they're not talking to each other. Looks like a bad connection via a connector not seated properly or maybe a bent pin or broken wire.

I think you'll have your hands full tracking this down. Good luck.

Bob

 

No com can also mean that the Real Time Dampening (RTD) module may not have any power. Check for a blown fuse or bad relay.

Here are a few things to check

ABS/RTD Maxi Fuse# 53. It is in the under hood electrical center.

ABSTRNS Mini Fuse # 5. It is in the under hood electrical center.

RTD Mini fuse# 7. It is in the under hood electrical center.

RTD Micro relay# 41 It is in the under hood electrical center.

The RTD system is grounded at chassis ground G-402. That ground is on the rear passengers side frame rail, between the reartire and the plastic fender skirt.

Bill C

 

I never thought of a fuse. Must be getting old. He had already checked his connections, so I bet that's it.

Bob

 

Thanks for the help, I checked #53 & #7 fuse, my '97 dosen't use the #5 fuse, they checked ok. I am not sure how to check the relay. Anyway I went back into the car and unplugged the ESC module which is the only thing I unplugged earlier to do the interior. I've rechecked this a couple of times, this time I checked all the wires and the pins everything was ok, but before plugging it back together I sprayed it with 2-26 CRC, which is suppose to improve electrical connections. This worked. When I ran the diagnostic again I a code C1790 H in the RTD, I cleared this and now everything seems ok. The only thing left is I still get a code P1571 H. It doesn't seem to effect anything as I do not get the warning messages anymore.
One last thing can you tell me how to check the relay's, just for future reference.
Thanks for the help

 

You need a schematic that shows which terminals do what inside the relay. Use an ohm meter and check the coil, the open and closed contacts and check for any high resistance contacts when the relay is actuated.

That is all there is to it.

BC

 

When I was having problems with codes, although I didn't take anything apart, it turned out to be a loose ground. In my case it was the ground under the battery , you could wiggle back and forth, thats how loose it was. After tightning all problems solved, good luck, Jim.