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1991 Cadillac Sedan Deville
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Discussion Starter #1
could use all info on code pulling and testing anti lock system.light only come on when driving.on frist stop you can feel the anti lock system kick in and light comes on.seams to me that its a wheel sensor.so testing info on sensors would also be great.
 

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1995 Deville 4.9L 200,000m
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498 Posts
THese codes are for my '95 Devile:

DTC 21 RF Wheel Speed Sensor Circuit Fault
DTC 23 RF Wheel Speed Sensor Circuit Continuity Fault
DTC 25 Left Front Wheel Speed Sensor Fault
DTC 27 LF Wheel Speed Sensor Circuit Continuity Fault
DTC 28 Wheel Speed Sensor Frequency Error
DTC 31 Right Rear Wheel Speed Sensor Fault
DTC 33 Right Rear Wheel Speed Sensor Continuity Fault
DTC 35 Left Rear Wheel Speed Sensor Fault
DTC 37 Left Rear Wheel Speed Sensor Continuity Fault
DTC 41 Right Front ABS Valve Solenoid Fault
DTC 42 Right Front ABS Outlet Valve Solenoid Fault
DTC 43 Right Front TCS Prime Valve Solenoid Fault
DTC 44 Right Front TCS Isolation Valve Solenoid Fault
DTC 45 Left Front ABS Valve Solenoid Fault
DTC 46 Left Front ABS Outlet Valve Solenoid Fault
DTC 47 Left Front TCS Prime Valve Solenoid Fault
DTC 48 Left Front TCS Isolation Valve Fault
DTC 51 Right Rear ABS Inlet Valve Solenoid Fault
DTC 52 Right Rear Outlet Valve Solenoid Fault
DTC 55 Left Rear ABS Inlet Valve Solenoid Fault
DTC 56 Left Rear ABS Outlet Valve Solenoid Fault
DTC 61 Pump Motor or Pump Motor Circuit Fault
DTC 63 Valve Relay Circuit Fault
DTC 67 TCC/Bls Switch Fault
DTC 71 EBTCM/EBCM Internal Fault
DTC 72 IPC Serial Data Link Fault
DTC 73 PCM-EBTCM PWM Signal Fault
DTC 77 PCM/Serial Data Link Fault
DTC 83 Brake Fluid Level Low
DTC 85 Low Voltage
 

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Registered
1995 Deville 4.9L 200,000m
Joined
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498 Posts
I have a LF speed sensor continuity fault code. It used to have a WSS fault code but I replaced the hub. The sensor is integral to the hub, BTW. I have tested the circuit with my multimeter and there is nothing wrong with it. Every now and then I would get a T077 code. PCM serial data link fault.

Turns out the ground stud on the break pump (Bosch 5.0) is broken and just spins when I try to tighten the ground wire.

A new pump is like $1500 or something outrageous like that, I plan to go to Pull-A-Part and try out a used one for $38.07.
 
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