Speed Sensor prob-Code 0104??? HELP!
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Speed Sensor prob-Code 0104??? HELP!
Hey, I'm a newbie to the boards, but have used alot of advice from here recently but need some more help. I've got a 96 and have had the ECU spit out the 0104 code since I got it last year. The dealer replaced the speed sensor and the speedo and the harness to the speedo right before I bought it, but about 3 months later I got the dreaded CEL with knock sensor and speed sensor codes. I pulled the speed sendor and it seems to work fine (measures proper voltage), I even bought a new one and compared the output-same. I reset the ECU hoping it just wasn't in far enough, now I'm getting the same old codes and a new one 0504, which hs something to do with the AT unit? HELP!
Sorry for the long read.
Clint
Sorry for the long read.
Clint
Thread Starter
Newbie - Just Registered
Joined: Nov 2003
Posts: 2
Originally Posted by chall24
Hey, I'm a newbie to the boards, but have used alot of advice from here recently but need some more help. I've got a 96 and have had the ECU spit out the 0104 code since I got it last year. The dealer replaced the speed sensor and the speedo and the harness to the speedo right before I bought it, but about 3 months later I got the dreaded CEL with knock sensor and speed sensor codes. I pulled the speed sendor and it seems to work fine (measures proper voltage), I even bought a new one and compared the output-same. I reset the ECU hoping it just wasn't in far enough, now I'm getting the same old codes and a new one 0504, which hs something to do with the AT unit? HELP!
Sorry for the long read.
Clint
Sorry for the long read.
Clint
0104
Diagnostic Trouble Code 0104 points to a problem with the Vehicle Speed Sensor or the associated wiring.
The Vehicle Speed Sensor installed on the transaxle. The part inside the transaxle has a plastic gear which is driven by the internal parts of the transaxle. The part outside is a signal generator which produces a square wave of amplitude 5.2 volts and frequency proportional to vehicle speed.
Remove the VSS, attach a voltmeter to the electric leads, and spin the gear
by hand. If you get zero volts, it's dead.
One owner discovered his VSS was not fully seated in the transaxle. He just tapped it inward, and retightened the 10mm mounting bolt.
For more information please refer to the Chilton repair manual (page 4-22) or the Haynes repair manual (page 6-16).
if hte dealer replaced it 3 motnhs ago take it bacj to him since dealers are suppose to put a 1 year/12000 mile warrenty on their work
0504
Diagnostic Trouble Code 0504 points to a problem with the Automatic Transmission Communications line. Pulse signals are exchanged between the Engine Control Module and the Transmission Control Module to assure smooth shifting during hard acceleration or deceleration.
This malfunction is detected when the ECM continuously receives an incorrect voltage from the TCM. Possible causes include...
- Harness or connectors (The communications line circuit between the ECM and the TCM is open or shorted.)
- TCM
- Discharged or faulty battery
Diagnostic Trouble Code 0104 points to a problem with the Vehicle Speed Sensor or the associated wiring.
The Vehicle Speed Sensor installed on the transaxle. The part inside the transaxle has a plastic gear which is driven by the internal parts of the transaxle. The part outside is a signal generator which produces a square wave of amplitude 5.2 volts and frequency proportional to vehicle speed.
Remove the VSS, attach a voltmeter to the electric leads, and spin the gear
by hand. If you get zero volts, it's dead.
One owner discovered his VSS was not fully seated in the transaxle. He just tapped it inward, and retightened the 10mm mounting bolt.
For more information please refer to the Chilton repair manual (page 4-22) or the Haynes repair manual (page 6-16).
if hte dealer replaced it 3 motnhs ago take it bacj to him since dealers are suppose to put a 1 year/12000 mile warrenty on their work
0504
Diagnostic Trouble Code 0504 points to a problem with the Automatic Transmission Communications line. Pulse signals are exchanged between the Engine Control Module and the Transmission Control Module to assure smooth shifting during hard acceleration or deceleration.
This malfunction is detected when the ECM continuously receives an incorrect voltage from the TCM. Possible causes include...
- Harness or connectors (The communications line circuit between the ECM and the TCM is open or shorted.)
- TCM
- Discharged or faulty battery
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