98 Ex P1780

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Aug 25, 2008 | 03:38 PM

Schtoke

Thread Starter

Freshman User

Joined: Apr 2007

Posts: 30

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98 Ex P1780

Got my intake gaskets replaced today, and go to read codes again,all clear.
Performed a KOER test and got a P1780 code(Trans ctrl sw out of range).
Any ideas out there?
Thanx

Aug 25, 2008 | 10:33 PM

jk080

Transmission Rebuilder

Joined: Jul 2008

Posts: 1,570

Likes: 63

From: North Georgia

</td><td>P1780</td><td>

</td><td width="100%">Transmission Control Switch Out of Self-Test Range</td><td>

</td><td>

</td></tr><tr><td colspan="6">

</td></tr><tr><td>

</td><td colspan="4">

</td><td>

</td></tr></tbody></table><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td>

</td><td>

</td><td width="50%" align="left">Possible Causes</td><td>

</td><td width="50%" align="left">Setting Conditions</td><td>

</td><td>

</td></tr><tr><td>

</td><td>

</td><td valign="top" align="left">

TCS is damaged
TCS circuit open or shorted in the wiring harness
TCS not cycled during the self-test
PCM has failed

</td><td>

</td><td valign="top" align="left">KOER Self-Test Enabled Engine started, and the PCM detected the Transmission Control Switch (TCS) was out of range during the self-test.
This code sets in 1 Trip(s).</td></tr></tbody></table>

Aug 26, 2008 | 05:59 AM

Schtoke

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Thank you JK, looks like I got more work in front of me.

Aug 26, 2008 | 08:30 AM

jk080

Transmission Rebuilder

Joined: Jul 2008

Posts: 1,570

Likes: 63

From: North Georgia

I would just replace the switch, they are known for problems.

I cant remember the KOER test, I havent done it in a while, you might want to try it running in neutral.