TCM failure

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lax17

NAXJA Forum User

Location

.;,

• Nov 19, 2005

• #1

Friday, my Jeep threw the codes P1682-Charging system, and P1698-TCM. When they tested the alternator it was reading like 1.2 amps; what is the normal number? Also what places sell a TCM for a '98 Jeep Cherokee, and wht years will work for me?

Has anyone ever seen these two codes showup at the same time?
TIA

 

old_man

NAXJA Forum User

Location

Loveland, Colorado

• Nov 19, 2005

• #2

If the battery is fully charged, 1.2 amps is fine. If it is discharged, it is not. Turn on the headlights and see what it says.

 

87manche

NAXJA Forum User

Location

Ohio

• Nov 19, 2005

• #3

Don't know about the TCM, but it might be possible the alternator is related. I'd fix the alternator then see what happens. No sense in replacing somehting that might not be broken.

 

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lax17

NAXJA Forum User

Location

.;,

• Nov 19, 2005

• #4

I had Advance charge the battery, and when it was done the machine said the battery was good. I first noticed something was wrong when I was braking at a stop light and the speedometer went all the way up and past 100.

 

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LouisianaZJ

NAXJA Member #1362

Location

Louisiana

• Nov 19, 2005

• #5

they need to test the alternator with a load placed on it. (usually with the testing machine) go back and double check the measurement

under full load the alt puts out about 90 amps

 

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lax17

NAXJA Forum User

Location

.;,

• Dec 7, 2005

• #6

Turned out to be the alternator not giving it enough power, thanks for all your help.