1998 Honda Civic SPEED sensor / speedometer malfuntion

Tiny
EFAUL33815
  • MEMBER
  • 1998 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 119,000 MILES
119000 speedometer fails and comes back on at will
after rebooting check engine light stays off or on while speedometer is working. I am taking it back to a repair shop for the 5th time Monday $1270.00 later
started with a tune up 3 weeks ago because of a check engine light $270.00 and then $ 1000.00 more to replaced a alternater, computer speed sensor
electrical socket to speed sensor, fan motor and head light reconditioning kit and towing the original
analizer code after tune up po501?
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Friday, November 27th, 2009 AT 3:38 PM

1 Reply

Tiny
DAVE H
  • EXPERT
Hello .. thanks for the donation .. much appreciated

You have replaced the sensor and the computer .. you will now need to check the wiring !!

DTC P0500 & P0501: VEHICLE SPEED SENSOR (VSS) MALFUNCTION

Test drive vehicle. Using scan tool, check vehicle speed. If correct speed is not indicated, go to next step. If correct speed is indicated, problem is intermittent. System is okay at this time. Check for poor connections or loose wires at VSS and PCM connectors. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary.

Turn ignition off. Block rear wheels and set parking brake. Raise and support front of vehicle. Turn ignition on. Block right front wheel and slowly rotate left front wheel by hand. Using backprobe set, measure voltage between PCM 25-pin connector "B" terminal No. 20 (Brown/Black wire) and PCM 31-pin connector "C" terminal No. 23 (Blue/White wire). See Fig. 2 and Fig. 3 . If voltage does not pulse between zero and 5 volts or battery voltage, go to next step. If voltage pulses between zero and 5 volts or battery voltage, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM.

Turn ignition off. Disconnect PCM 31-pin connector "C". Turn ignition on. Block right front wheel and slowly rotate left front wheel by hand. Using backprobe set, measure voltage between PCM 25-pin connector "B" terminal No. 20 (Brown/Black wire) and PCM 31-pin connector "C" terminal No. 23 (Blue/White wire). See Fig. 2 and Fig. 3 . If voltage pulses between zero and 5 volts or battery voltage, substitute a known-good PCM and recheck. If symptom or indication goes away, replace original PCM. If voltage does not pulse between zero and 5 volts or battery voltage, check for short in Blue/White wire between PCM, TCM and VSS. Also check for open in Blue/White wire between PCM and VSS.

Fig2 " B"Terminals


http://www.2carpros.com/forum/automotive_pictures/266999_honda1_1.jpg


Fig3 "C" Terminals


http://www.2carpros.com/forum/automotive_pictures/266999_honda2_1.jpg



I would also check the junction connector in the right Kick Panel ... this may have been damaged by passengers feet !!


http://www.2carpros.com/forum/automotive_pictures/266999_honda_2.jpg



Hope this helps


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_294.png

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Saturday, November 28th, 2009 AT 5:02 AM

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