98redjeep

So in an attempt to diagnose my p0700 and p0740, I seam to have created more problems. I took the 26 pin plug off of the TCM to probe and test for voltage, tips voltage (inconclusive test) as well as brake switch (good test) and solenoid c (good test). When I plugged it back in I am getting p1698. It seems drivable. I was worried I might have bent some pin sockets withy meter probe. Is there a way to tale the pins out of the plug to inspect them? Did the ecu not like being turned on with the TCM unplugged and throw a fit?

dmill89

Most likely, P1698 is for no communication from TCM. Try disconnecting the battery (touch the two leads together after disconnecting to drain any residual voltage in the capacitors) to reset the PCM memory and see if the code comes back.

98redjeep

I will try that! I tried to clear the codes but it would not clear. I assume that meant the code was still active??

Anony

P1698 No Bus message from the TCM

Set Condition : .. No bus messages from the TCM for 10 seconds, two trips required.

First clear the code and see it it comes back ... if you have another CEL visually inspect the wiring harness.

Look for any chafed, pierced, pinched, or partially broken wires, broken, bent, pushed out, or corroded terminals.

If the MIL is out (no P1698 DTC) try wiggling the wiring harnesses to see if the MIL (P1698) or other DTC occurs.

Possible causes: P1698

Intermittent Condition
Communications with TCM
PCM

* NO RESPONSE FROM PCM during ENGINE STARTS (GAS ONLY)

PCM Power and Grounds
Transmission Control Module
Controller Antilock Brake
SCI Transmit Circuit Shorted to Gnd
SCI Receive Circuit Shorted to Gnd
SCI Receive Circuit Open
SCI Transmit Circuit Open
Powertrain Control Module

Anony

The codes (DTCs) need to be completely erased from the PCM without any CEL.

If the codes are cleared the MIL should be out when the ign. key is first turned to the On postion.

If the set condition occurs again the DTC will come back with a CEL.

Some DTCs don't produce a CEL (MIL).

P1698 - Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was
recorded

98redjeep

So, what are you saying I should do exactly? Try to clear the codes with the key in the ON posistion?

Anony

No, clear the codes (with the ign. OFF) then turn the ign. key to the ON postion to make certain the codes are clear.

Easier to have a scanner, press a button the scanner displays a message that the codes are cleared. (No messing with the battery cables, shorting things out, etc.)

* If your having some sort of DTC that occurs while the engine is OFF (ign On), it possible the MIL will occur a few seconds after the Ign. key is turn to the ON position.

--------------- scanner use ------------

While connected to a scanner the Ign. is ON >> clearing the codes >> the MIL light will go OFF.

If the fault (set condition) still exists, the MIL should come back ON again (OFF then ON)

If this happens try clearing the code memory (DTCs) several times ...

MIL will continually go OFF then back ON again after each reset, ... IF the "set condition" still exists.

A set condition are any existing conditions capable of tripping a DTC.

* Scanners I have used only allow clearing codes while the Ign. is ON and engine OFF. Power from the battery to the OBD and electronics is required to clear codes.

98redjeep

I have a scanner, I'll give it a shot!

98redjeep

That cleared the light!!!

I may be back to my original codes when I go down the road but at least that new code is gone!