No EPS - Attempting to Diagnose Problem
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Joined: Mar 2006
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Originally Posted by mattstryfe' timestamp='1399416919' post='23147367
[quote name='Alf_09NFR' timestamp='1399415015' post='23147326']
Just noticed that you have "NO" circled on step 5. That is a resistance measurement similar to what I was just describing on the TS, but from pin 3 of the TS computer (not the cable) to chassis ground.
Did you really measure no continuity at that point? If so, was the EPS computer still mounted and connected except for that one cable?
Just noticed that you have "NO" circled on step 5. That is a resistance measurement similar to what I was just describing on the TS, but from pin 3 of the TS computer (not the cable) to chassis ground.
Did you really measure no continuity at that point? If so, was the EPS computer still mounted and connected except for that one cable?
I connected one end of my multi-meter to a chassis and the other end into the pink wire (3). No sound.
Yes, it was still mounted with everything except for the EPS Control Unit Connector plugged up. (ignition off)
(You might want to consider spending $20 and getting an inexpensive multi-meter...)
[/quote]
Alright. That makes a bit more sense. 'Priciate your help.
I have a multi-meter already. This one.
I am learning as I'm going so it's slow and arduous.
Joined: Jul 2009
Posts: 61
Likes: 1
From: Seattle
Originally Posted by Alf_09NFR' timestamp='1399417467' post='23147379
[quote name='mattstryfe' timestamp='1399416919' post='23147367']
[quote name='Alf_09NFR' timestamp='1399415015' post='23147326']
Just noticed that you have "NO" circled on step 5. That is a resistance measurement similar to what I was just describing on the TS, but from pin 3 of the TS computer (not the cable) to chassis ground.
Did you really measure no continuity at that point? If so, was the EPS computer still mounted and connected except for that one cable?
[quote name='Alf_09NFR' timestamp='1399415015' post='23147326']
Just noticed that you have "NO" circled on step 5. That is a resistance measurement similar to what I was just describing on the TS, but from pin 3 of the TS computer (not the cable) to chassis ground.
Did you really measure no continuity at that point? If so, was the EPS computer still mounted and connected except for that one cable?
I connected one end of my multi-meter to a chassis and the other end into the pink wire (3). No sound.
Yes, it was still mounted with everything except for the EPS Control Unit Connector plugged up. (ignition off)
(You might want to consider spending $20 and getting an inexpensive multi-meter...)
[/quote]
Alright. That makes a bit more sense. 'Priciate your help.
I have a multi-meter already. This one.
I am learning as I'm going so it's slow and arduous.
[/quote]
That meter is fine. Look back at my previous post, I made an edit.
Thread Starter
Joined: Mar 2006
Posts: 251
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Indeed. Okay. Well I will attack it again tomorrow. I'd hate to wait until the weekend before I figure out I need to order something. I find the randomness of this issue a bit odd. This is the first time that somethings actually broken on the car so I'm a bit taken back I guess.
Frustrating to not know what it is right away though... Thanks again for your help.
Frustrating to not know what it is right away though... Thanks again for your help.
Joined: Jul 2009
Posts: 61
Likes: 1
From: Seattle
Step 5: If you end up with no continuity (very high/infinite resistance) when measuring pin 3 of the 14 pin connector to ground (with the TS plugged in), then you need to do step 9.
Step 9: This measures the resistance/continuity of the cable from the 14 pin plug on the EPS to the plug on the TS. Unplug both the 14 pin from the EPS and the 3 pin at the TS. Measure the resistance values for each of the three wires in the list. (Connect one lead from your meter to the specified pin in the 14 pin connector, and the other lead from your meter to the corresponding pin in the TS connector.)
If the cable checks out OK, then we measure the TS (step 10) to see if it has an open circuit.
Report back with results.
Jim
Step 9: This measures the resistance/continuity of the cable from the 14 pin plug on the EPS to the plug on the TS. Unplug both the 14 pin from the EPS and the 3 pin at the TS. Measure the resistance values for each of the three wires in the list. (Connect one lead from your meter to the specified pin in the 14 pin connector, and the other lead from your meter to the corresponding pin in the TS connector.)
If the cable checks out OK, then we measure the TS (step 10) to see if it has an open circuit.
Report back with results.
Jim
Thread Starter
Joined: Mar 2006
Posts: 251
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Step 5: If you end up with no continuity (very high/infinite resistance) when measuring pin 3 of the 14 pin connector to ground (with the TS plugged in), then you need to do step 9.
Step 9: This measures the resistance/continuity of the cable from the 14 pin plug on the EPS to the plug on the TS. Unplug both the 14 pin from the EPS and the 3 pin at the TS. Measure the resistance values for each of the three wires in the list. (Connect one lead from your meter to the specified pin in the 14 pin connector, and the other lead from your meter to the corresponding pin in the TS connector.)
If the cable checks out OK, then we measure the TS (step 10) to see if it has an open circuit.
Report back with results.
Jim
Step 9: This measures the resistance/continuity of the cable from the 14 pin plug on the EPS to the plug on the TS. Unplug both the 14 pin from the EPS and the 3 pin at the TS. Measure the resistance values for each of the three wires in the list. (Connect one lead from your meter to the specified pin in the 14 pin connector, and the other lead from your meter to the corresponding pin in the TS connector.)
If the cable checks out OK, then we measure the TS (step 10) to see if it has an open circuit.
Report back with results.
Jim
Step 5:
Pink wire (pin 3) when grounded has no continuity. (No tone when connecting to ground)
Step 9:
Testing the wires from EPS to the plug on the TS. They all pass. I get a tone on all 3.
Step 10:
This is where I get a bit lost. Unless these numbers are just absurdly off and I need a new one. (see below)
- Blue/Red to Pink
- 770
- Blue/Red to White/Green
- 981
Video 2 (multi-meter setting on 2000)
So the resistance is supposed to be between 12-14 ohms? I think this is a bit off.
Joined: Jul 2009
Posts: 61
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From: Seattle
Well then, congratulations. Your EPS is working (according tot he troubleshooting guide).
Hmmm, but its not working you say? Is the ground wire from the steering rack (near the middle) connected to the cross member?
Still don't understand your step 5 results. Simply put, step 5 tests the cable (pin 3) and the TS continuity at the same time.
The connector to the TS and big 2-pin connector (red and black heavy wires) to the steering rack should be connected, and only the plug at the EPS disconnected. You measure from pin 3 (in the EPS cable 14 pin connector) to ground. That just tests the wire in the cable to the TS, and the TS internal connectivity. You measured the 3 wires in the cable and checked OK, and the TS checked OK, but step 5 just measures the TS from the EPS end of the cable.
Note that step 5 does not depend on (or involve) the EPS unit, so since you're getting conflicting results, try step 5 again.
...and re-check the 70A EPS fuse in the "auxiliary under hood fuse box".
Hmmm, but its not working you say? Is the ground wire from the steering rack (near the middle) connected to the cross member?
Still don't understand your step 5 results. Simply put, step 5 tests the cable (pin 3) and the TS continuity at the same time.
The connector to the TS and big 2-pin connector (red and black heavy wires) to the steering rack should be connected, and only the plug at the EPS disconnected. You measure from pin 3 (in the EPS cable 14 pin connector) to ground. That just tests the wire in the cable to the TS, and the TS internal connectivity. You measured the 3 wires in the cable and checked OK, and the TS checked OK, but step 5 just measures the TS from the EPS end of the cable.
Note that step 5 does not depend on (or involve) the EPS unit, so since you're getting conflicting results, try step 5 again.
...and re-check the 70A EPS fuse in the "auxiliary under hood fuse box".
Thread Starter
Joined: Mar 2006
Posts: 251
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Originally Posted by mattstryfe' timestamp='1399503840' post='23149323
Both 12. Right on the money.
Hmmm, but its not working you say? Is the ground wire from the steering rack (near the middle) connected to the cross member?
Still don't understand your step 5 results. Simply put, step 5 tests the cable (pin 3) and the TS continuity at the same time.
The connector to the TS and big 2-pin connector (red and black heavy wires) to the steering rack should be connected, and only the plug at the EPS disconnected. You measure from pin 3 (in the EPS cable 14 pin connector) to ground. That just tests the wire in the cable to the TS, and the TS internal connectivity. You measured the 3 wires in the cable and checked OK, and the TS checked OK, but step 5 just measures the TS from the EPS end of the cable.
Note that step 5 does not depend on (or involve) the EPS unit, so since you're getting conflicting results, try step 5 again.
...and re-check the 70A EPS fuse in the "auxiliary under hood fuse box".
Now I am getting 2 codes.
DTC: 13 A problem with average of voltage for torque sensor VT1 and VT2
DTC: 14 Open or short to body ground in the torque sensor circuit
I didn't believe it until I went back and looked at my video.
Is the ground wire from the steering rack (near the middle) connected to the cross member?
Yes. I unbolted both of the ground bolts (both sides) and wire brushed them to be certain.