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Old 07-14-2010, 09:29 PM   #1
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Icon6 Honda Civic 03 Drive Light Blinking + Transmission Range Switch

I have an automatic Honda Civic EX 2003. I started to have this problem over a month ago... When I slowed down to stop, my car would suddenly shift down into 1st gear with a jerk. Then the drive light began to blink, and the check engine light came on. And this would keep happening until I turn off the car and start it again. Then the check engine light would still be there, but the drive light was back to normal. This was intermittent, and if it didn't happen within the first few minutes of driving, then it wouldn't happen that ride.

Eventually it started happening more often, and I decided to get it checked. I took it to the Honda dealer, and they said it was either the transmission range switch, or the after-market car starter (which I had installed for about 2 years and never gave me problems). They replaced the transmission range switch, but after a while the problem began again. Now it's getting more serious, because sometimes it would shift up with that same jerky feeling at around 30 mph or 50 mph. One time it wouldn't even shift up past 3rd gear.

I don't know much about cars, but I'm pretty sure it's not the after-market car starter, because it hasn't given me any problems for the 2 years I've had it. And I don't want to pay Honda to "fix" something that isn't broken only to come back the next day with the same problem. Any ideas?
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Old 07-14-2010, 09:58 PM   #2
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Is the D light still blinking? Is the MIL (check engine light) still on, or has it come on recently? There should still be stored temporary DTC codes which can be recovered with a scan.

You can take it to Autozone or other various auto parts stores for a free scan. That would help determine what the problem is.


I need you to be more specific that "feeling jerky around 30 mph or 50 mph" ... which gear is this happening in? When it shifts from 3rd to 4th? It could be a number of things - Defective 4th clutch, defective A/T clutch pressure control solenoid A or B, defective CPC valve, defective 3rd accumulator, defective 3-4 orifice control valve.

How many miles are on the car? The automatic transmission could be wearing out and is in need of a rebuild or replacement. Basically, this isn't something you're going to fix at home.
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Old 07-15-2010, 08:02 AM   #3
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Icon6 Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

I have 80k miles. Whenever I drive and the D light blinks within the first minute, I have this problem. So, now this is happening every other time, so yes the D light is still blinking every other time I drive. After the first time the D light started blinking, the MIL light came on and hasn't gone away.

Last time I got it fixed, Honda checked the code and then they ended up replacing the Transmission Range Switch. I don't know if that helps, but I suspect that same code will show up again. Once I go to Autozone, I will post the code.

I am not an expert on cars, but my friend describes the jerky feeling the same as shifting gears and releasing the clutch too soon in a manual car. This usually happens every time I slow down to a complete stop, so probably shifting down from 2nd to 1st gear. A couple times I felt it shifting up, when I was going around 30 mph (probably 2nd to 3rd gear?). And once I felt it shifting up while I was going around 50 mph (3rd to 4th gear?).

In my original post, I said one time I felt it wouldn't even shift up out of 3rd gear. Now I am starting to think that was 2nd gear I couldn't shift up out of, cause I think I was going around 30-35 mph around that time.
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Old 07-15-2010, 11:57 AM   #4
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Quote:
Originally Posted by moali200 View Post
Once I go to Autozone, I will post the code.
That will help, tremendously. That way we're not just tossing guesses back and forth.
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Old 07-15-2010, 02:05 PM   #5
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Icon6 Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

The code was P1705 - Automatic Transaxle Concerns
He said more specifically: Transmission Range Switch Short
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Old 07-17-2010, 01:07 PM   #6
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Quote:
Originally Posted by moali200 View Post
The code was P1705 - Automatic Transaxle Concerns
He said more specifically: Transmission Range Switch Short

Short to ground, to be specific. Are you mechanically inclined? If I were to put together a list of troubleshooting steps would you be able to use a DMM (digital multimeter) in order to fix your car, or are you going to take it in for repair?
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Old 07-17-2010, 06:06 PM   #7
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

I do have a DMM, and a few basic tools. So if it's simple enough, I would be able to try it. Otherwise, I would have to take it in.
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Old 07-19-2010, 08:24 PM   #8
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Troubleshooting DTC P1705 - Transmission Range Switch (short to ground)

Click the image to open in full size.

1. Turn the Ignition Switch ON (II)

2. Observe the AT gear position indicator, and shift each position separately.

- Do any indicators stay on when the shift lever is not in that position?
Yes: Turn the ignition switch OFF, then go to step 4.
No: Go to step 3

3. Clear the DTC and test-drive the car.
- Is DTC P1705 indicated?
Yes: Review the freeze data. If the freeze data indicates more than one gear position indicator on at one time, go to step 4.
No: Intermittent failure; wiggle the wire harness and check for intermittent short to ground.

4. Disconnect the transmission range switch connector, and turn the ignition switch ON (II).
- Do all gear position indicators go out?
Yes: Replace the transmission range switch.
No: Turn the ignition switch OFF, then go to step 5.

5. Test the transmission range switch.
- Is the switch okay?
Yes: Go to step 6.
No: Replace the transmission range switch.

6. Connect the transmission range switch connector.

7. Turn the ignition ON (II)

8. Shift to any position other than R.

9. Measure the voltage between PCM connectors C10 and A23 or A24.
- Is there battery voltage?
Yes: Go to step 10
No: Check for a short between PCM connector terminal C10 and the transmission range switch or AT gear position indicator, and check for an open in the wires between PCM connector terminals A23 and A24, and body ground (G101). If the wires are okay, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.

10. Shift to any position other than D.

11. Measure the voltage between PCM connector terminals C20 and A23 or A24.
- Is there about 5 volts?
Yes: Go to step 12.
No: Check for a short in the wire between PCM connector terminal C20 and the transmission range switch. If the wire is okay, update the PCM if it does not have the latest software, or substitute it with a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.

12. Shift to any position other than D3.

13. Measure the voltage between PCM connector terminals C9 and A23 or A24.
- Is there about 5 volts?
Yes: Go to step 14.
No: Check for a short in the wire between terminal C9 and the transmission range switch. If the wire is okay, update the PCM if it does not have the latest software, etc etc, as mentioned a couple times. (tired of writing that out)

14. Shift to any position other than 2.

15. Measure the voltage between PCM connector terminals C11 and A23 or A24.
- Is there about 5 volts?
Yes: Go to step 16.
No: Check for a short in the wire between C11 and the transmission range switch. If the wire is okay, update the PCM if it does not have the latest software, etc. etc.

16. Shift to any position other than P and N.

17. Measure the voltage between PCM connector terminals C12 and A23 or A24.
- Is there about 5 volts?
Yes: Go to step 18
No: Check for a short in the wire between C12 and the transmission range switch. If the wire is okay, update the PCM, etc etc.

18. Shift to any position other than D and D3.

19. Measure the voltage between PCM connector terminals C18 and A23 or A24.
- Is there battery voltage?
Yes: The PCM failed; replace it.
No: Check for a short in the wire between C18 and the transmission range switch. If the wire is okay, update the PCM if it does not have the latest software, etc. etc.




I'll have to make another DIY for testing the TRS. (step 5)

Last edited by It Wasn't Me; 01-04-2011 at 07:27 PM. Reason: Replaced missing image
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Old 07-19-2010, 09:47 PM   #9
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Transmission Range Switch Test


1. Remove the transmission range switch harness connector from the connector bracket and then disconnect it.

2. Check for continuity between the terminals at the harness connector. There should be continuity between the terminals listed for each switch position.

Click the image to open in full size.

Click the image to open in full size.


3. If there is no continuity between any terminal, remove the transmission range switch cover and disconnect the connector at the switch.

4. Check for continuity between terminals at the switch connector. (not the harness, but on the switch itself) There should be continuity between the terminals listed for each position.

Click the image to open in full size.

Click the image to open in full size.

5. If there is not continuity between any terminals, adjust the transmission range switch installation. If the transmission range switch installation is okay, replace the switch.

6. If the transmission range switch continuity check was okay, replace the faulty transmission range switch harness.

Last edited by It Wasn't Me; 01-04-2011 at 07:31 PM. Reason: Replaced missing images
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Old 01-16-2013, 04:26 PM   #10
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Default Re: Honda Civic 03 Drive Light Blinking + Transmission Range Switch

Can you Upload the pictures again please? i have this problem on my Honda Civic
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2002, 2003, blinking, check, civic, crv, dlight, drive, engine, flashing, honda, intermittently, jerk, light, pilot, shift, transmission

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