Question about 2004 Pontiac Grand Prix

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How to repair speed sensor - 2004 Pontiac Grand Prix

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MY SPEEDOMETER IS NOT READING CORRECTLY.WHAT CAN I DO?

Posted on Aug 28, 2010

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What parts have to be removed to change output speedsensor on 97 sebring convertible jxi?


Hi Nicholas, Im AL the owner of Big As Auto Repair.

FRONT WHEEL SPEED SENSOR

REMOVE
  1. Raise vehicle on jack stands or centered on a frame contact type hoist. See Hoisting in the Lubrication and Maintenance section of this manual, for the required lifting procedure to be used for this vehicle.
  2. Remove the tire and wheel assembly from the vehicle.
  3. Remove the speed sensor cable routing bracket Speed Sensor Cable Routing Brackets from the steering knuckle. Remove the wiring harness sealing grommet retainer and speed sensor routing bracket from the inner fender.
  4. Remove speed sensor sealing grommet from the inner fender Wheel Speed Sensor Connection To Vehicle Wiring Harness Then unplug the speed sensor cable from the vehicle wiring harness Wheel Speed Sensor Connection To Vehicle Wiring Harness
  5. Remove bolt Speed Sensor Head Attachment To Steering Knuckle attaching the speed sensor head to the steering knuckle. Then remove speed sensor head from steering knuckle. CAUTION: If speed sensor head locating pin has seized to the steering knuckle, do not attempt to remove speed sensor head by grasping with pliers and turning. This will damage the speed sensor head. Use only the following procedure.
  6. If speed sensor head can not be removed from steering knuckle by hand, the locating pin on the speed sensor head has seized to the steering knuckle do to corrosion. Remove speed sensor head from steering knuckle using the following procedure. Remove disc brake caliper from steering knuckle, and remove brake rotor from hub/bearing assembly. Then insert a pin punch through hole in front steering knuckle Speed Sensor Head Removal From Steering Knuckle and tap speed sensor head locating pin out of steering knuckle.
Hope this helps and please visit my auto-repair-website at:
http://www.bigasautorepair.com/

Oct 08, 2015 | Cars & Trucks

1 Answer

Trouble shoot


I believe that's a Speed Sensor issue.

Diag:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

Mar 21, 2014 | 1998 Acura Integra

1 Answer

Car


Speed Sensor probably. Try:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

Mar 21, 2014 | 1998 Acura Integra Type R

2 Answers

I have a 2001 aztek. ABS light comes on. But my biggest problem seems to be that my car jerks like it is the transmission slipping. My husband had it looked at and was told it is the speed control censor....


Get Another Car--LOL

Really --just throw that one away

Can you afford to do that?

When it was looked at ,why didn't you have it repaired?

The ABS Light is on -- so why wasn't that issue
diagnosed & repaired. That may be a Wheel Speed Sensor

Not the same thing as a transmission output speed sensor

I think vehicle technology is beyond your learning curve, at the
moment
Find a half decent repair shop

Jul 12, 2011 | 2004 Pontiac Aztek

1 Answer

Nissan Quest/Knock Sensor


n ot enough info to determine....... now what speed sensor.. one is the vehicle spped sensor to operate the speedodometer.. the other is for the engine speed for timming of motor..

Sep 04, 2009 | 2002 Nissan Quest

1 Answer

HOW TO REPLACE OR REPAIR WHEEL SPEED SENSOR


It is part of the bearing hub assembly.Very have to do without air tools,If setting multiple abs/tc code (wheel speed sensors) probably abs electronic module or chaffed wires on drivers side at ac lines by air box.Have big problems with this and probably will come back.

Jun 12, 2009 | 2005 Saturn Relay

1 Answer

Transmission


you need to have the trouble codes read go to autozone they can read them for you and write them down and report back it is most likley a speed sensor on the transmission there is two of them and they are very cheap and easy to change called input /output speed sensors
1 05014469AA Wiring Repair Package, Input Speed Sensor
1 05014471AA Wiring Repair Package, Output Speed Sensor you dont need to use the wiring harness supllied with these sensors as they are for early model vans only please rate -jeff

Aug 23, 2008 | 2001 Chrysler Town & Country

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