1996 Honda Accord Electrical or Transmission

Tiny
GETTEROBO
  • MEMBER
  • 1996 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 217,000 MILES
My transmission has been acting erratic and check engine light is on. It will not shift gears appropriately. Will not go down to 1st. Pulls off in 2nd. Will not go past 3rd gear. I disconnected the battery for a few seconds. When I reconnected, the check engine light went off and the transmission operates perfectly. However, after about 8 hours of operation the check engine light comes back on and the transmission behaves erratically again. I checked all fuses and relays inside and out, they work. What gives? Is it solenoid or emmission sensors?
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Sunday, February 7th, 2010 AT 9:39 AM

3 Replies

Tiny
KHLOW2008
  • EXPERT
Hi getterobo,

Thank you for the donation.

When the CEL comes on, an error has been detected and you need to retrieve the trouble codes to understand what is causing the problem.

Autozone provides free scanning to retrieve trouble codes. Let me know the exact trouble codes and we shall continue from there.
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Monday, February 8th, 2010 AT 10:21 AM
Tiny
GETTEROBO
  • MEMBER
The trouble code found was P0715
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Tuesday, February 9th, 2010 AT 8:11 AM
Tiny
KHLOW2008
  • EXPERT
You have a problem with the mainshaft speed sensor and here are the diagnostic procedures.

DTC P0715: (FLASH CODE 15) MAINSHAFT SPEED SENSOR
NOTE:
DTC P0715 (FLASH CODE 15) doesn't always mean an electrical problem in mainshaft speed sensor or circuit; this DTC can also be caused by a mechanical problem in transaxle.

1 . Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor connector and measure resistance between sensor connector terminals.

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

3 . If continuity exists, repair short to ground in Orange/Blue and White/Blue wires between PCM and mainshaft speed sensor. If continuity does not exist, reconnect mainshaft speed sensor connector. Measure resistance between PCM 25-pin connector "B" terminals No. 15 (Orange/Blue wire) and No. 14 (White/Blue wire).

4 . If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, perform DTC P0720 (FLASH CODE 9) diagnostic, check for loose PCM connectors and replace PCM with known good part, as necessary.

5. Disconnect mainshaft speed sensor connector. Check continuity of Red wire between PCM 25-pin connector "B" terminal No. 15 (Orange/Blue wire) and mainshaft speed sensor connector. If continuity exists, go to next step. If continuity does not exist, repair open Orange/Blue wire between PCM 25-pin connector and mainshaft speed sensor connector.

6 . Check continuity of White wire between PCM 25-pin connector "B" terminal No. 14 (White/Blue wire) and mainshaft speed sensor connector. If continuity exists, check for loose PCM connectors and replace PCM with known good part, as necessary. If continuity does not exist, repair open White/Blue wire between PCM 25-pin connector and mainshaft
speed sensor connector.


http://www.2carpros.com/forum/automotive_pictures/192750_TransComp97AccordlFig11_1.jpg

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Wednesday, February 10th, 2010 AT 12:51 AM

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