Service Engine Soon - No Connection with Code Read

[Recalculating]

Just replaced the supercharger coupler, the serpentine and supercharger belts and four pulleys. The battery was removed and the alternator dismounted for easier access.

The operation went well. Upon testing, I have a service engine soon light and when plugging into the data port, I have a connection error. I have taken it to Advance Auto and their scanner can not make a connection either. The vehicle runs great. Heads up display works along with the instrument display center. No abnormal readings. Cigarette lighter circuit is working. There are no blown fuses in the UHJB or in the fuse panel in the passenger side foot well. No fuses blown in the panel under the rear seat. All ground points near the battery are solid.

Tough one to figure. Anyone experienced this or having suggestions to repair? I do not know the actual circuit the data port gets its power from. I have the owner's manual and fuse panel covers with fuse assignments but none defining power for the data port.
Vehicle - 1999 Buick Ultra 118k

 

[yonyon]

If you grab a voltmeter or test light and find battery voltage at the DLC you don't have to do any more checking of fuses.

 

[The_Eric]

Originally Posted By: yonyon
If you grab a voltmeter or test light and find battery voltage at the DLC you don't have to do any more checking of fuses.


Also check for B- at the DLC too.



O/P, since you were in that area on the 3.8, check to make sure you didn't remove/damage the ground wire(s) that attach to the stud under the ignition control module. Sometimes it's a wire, sometimes it's a cluster of grounds. It or they're attached to a 3/8" ring terminal.

 

[Recalculating]

I have a solid connection of the white stripe on black wire connecting under the ignition control module. I did not loosen any of this assembly on the original repair other than changing the pulley nearby.

I do have power at the port. My scantool software is giving me an error 109 and failing to connect on com 3.

Thanks for the replies.

 

[GMBoy]

xTooltipElement
Service Information
1999 Buick Park Avenue | Park Avenue VIN C Service Manual | Document ID: 324377
--------------------------------------------------------------------------------

Scan Tool Does Not Communicate with Class 2 Data Line
Scan Tool Does Not Communicate with Class 2 Data Line Step
Action
Value(s)
Yes
No

1
Was the Data Link Communications Diagnostic System Check performed?
—
Go to Step 2
Go to Diagnostic System Check - Data Link Communications

2
 1. Connect a scan tool to another vehicle of the same model year in order to ensure proper operation of the scan tool.
 2. Turn the ignition switch to RUN.
 3. Attempt to establish communication with the vehicle.
Does the scan tool communicate with the vehicle?
—
Go to Step 4
Go to Step 3

3
The scan tool may be malfunctioning. Refer to the scan tool instruction manual. Ensure that the scan tool is functioning.

Does the scan tool operate properly?
—
Go to Step 33
—

4
 1. Connect the scan tool to the original vehicle.
 2. Verify that the scan tool connections are clean and tight.
Is the terminal contact between the DLC and the scan tool OK?
—
Go to Step 6
Go to Step 5

5
Repair the terminal contact at the DLC.

Is the repair complete?
—
Go to Step 33
—

6
Turn the ignition switch to RUN with the engine off.

Does the scan tool turn on?
—
Go to Step 12
Go to Step 7

7
Measure the voltage between DLC terminal 16 and chassis ground.

Is the voltage within the specified range?
10-15 V
Go to Step 9
Go to Step 8

8
Repair the open or short to ground in CKT 1140 (ORN).

Is the repair complete?
—
Go to Step 33
—

9
Measure the voltage from DLC terminal 16 to terminal 5.

Is the voltage within the specified range?
10–15 V
Go to Step 11
Go to Step 10

10
Repair the open in CKT 351 (BLK/WHT).

Is the repair complete?
—
Go to Step 33
—

11
Repair the open in CKT 350 (BLK).

Is the repair complete?
—
Go to Step 33
—

12
Using a DMM, measure the voltage from DLC terminal 2 to ground.

Is the voltage within the specified range?
10–15 V
Go to Step 15
Go to Step 13

13
Measure the resistance from DLC terminal 2 to ground.

Is the resistance within the specified value?
0-5 Ω
Go to Step 24
Go to Step 14

14
Repair the open in CKT 1807 (PPL) between DLC terminal 2 and C200 terminal A.

Is the repair complete?
—
Go to Step 33
—

15
 1. Disconnect C206.
 2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 17
Go to Step 16

16
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B5 and B6.

Is the repair complete?
—
Go to Step 33
—

17
 1. Disconnect C310.
 2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 19
Go to Step 18

18
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B5 and C310 terminal A3.

Is the voltage within the specified range?
10–15 V
Go to Step 33
—

19
 1. Reconnect C310.
 2. Disconnect C4 of the IP fuse block.
 3. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 21
Go to Step 20

20
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between the IP fuse block connector C4 terminal F1 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

21
 1. Reconnect C206.
 2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 22
Go to Step 23

22
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B6 and the IP fuse block connector C1 terminal D12. If OK, replace the IP fuse block.

Is the repair complete?
—
Go to Step 33
—

23
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between IP fuse block connector C4 terminal D1 and E1.

Is the repair complete?
—
Go to Step 33
—

24
 1. Disconnect C206
 2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 26
Go to Step 25

25
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B5 and B6.

Is the repair complete?
—
Go to Step 33
—

26
 1. Disconnect C310
 2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 28
Go to Step 27

27
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B5 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

28
 1. Reconnect C310.
 2. Disconnect C4 of the IP fuse block.
 3. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 30
Go to Step 29

29
Repair the short to ground in CKT 1807 (PPL) between IP fuse block connector C4 terminal F1 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

30
 1. Reconnect C206.
 2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 31
Go to Step 32

31
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B6 and IP fuse block connector C1 terminal D12. If OK, replace the IP block block.

Is the repair complete?
—
Go to Step 33
—

32
Repair the short to ground in CKT 1807 (PPL) between IP fuse block connector C4 terminal D1.

Is the repair complete?
—
Go to Step 33
—

33
 1. Turn the ignition switch to OFF.
 2. Reconnect or install any connectors or components that were disconnected or removed.
 3. Turn the ignition switch to ON.
 4. Clear any DTCs.
Are all of the DTCs cleared?
—
Go to Diagnostic System Check - Data Link Communications
—

© 2013 General Motors. All rights reserved.

 

[GMBoy]

Sorry somehow the cut and paste always gets gsrbled!! You csn try to read thru it...or PM me an email address and I will send the legible format as well as other diagnostics listed.

 

[yonyon]

Slightly less g1zzerbulled version in case you're imp@ient:
Originally Posted By: grep GMBoystext *
xTooltipElement
Service Information
1999 Buick Park Avenue | Park Avenue VIN C Service Manual | Document ID: 324377
--------------------------------------------------------------------------------

Scan Tool Does Not Communicate with Class 2 Data Line
Scan Tool Does Not Communicate with Class 2 Data Line Step
Action
Value(s)
Yes
No

1
Was the Data Link Communications Diagnostic System Check performed?
—
Go to Step 2
Go to Diagnostic System Check - Data Link Communications

2
1. Connect a scan tool to another vehicle of the same model year in order to ensure proper operation of the scan tool.
2. Turn the ignition switch to RUN.
3. Attempt to establish communication with the vehicle.
Does the scan tool communicate with the vehicle?
—
Go to Step 4
Go to Step 3

3
The scan tool may be malfunctioning. Refer to the scan tool instruction manual. Ensure that the scan tool is functioning.

Does the scan tool operate properly?
—
Go to Step 33
—

4
1. Connect the scan tool to the original vehicle.
2. Verify that the scan tool connections are clean and tight.
Is the terminal contact between the DLC and the scan tool OK?
—
Go to Step 6
Go to Step 5

5
Repair the terminal contact at the DLC.

Is the repair complete?
—
Go to Step 33
—

6
Turn the ignition switch to RUN with the engine off.

Does the scan tool turn on?
—
Go to Step 12
Go to Step 7

7
Measure the voltage between DLC terminal 16 and chassis ground.

Is the voltage within the specified range?
10-15 V
Go to Step 9
Go to Step 8

8
Repair the open or short to ground in CKT 1140 (ORN).

Is the repair complete?
—
Go to Step 33
—

9
Measure the voltage from DLC terminal 16 to terminal 5.

Is the voltage within the specified range?
10–15 V
Go to Step 11
Go to Step 10

10
Repair the open in CKT 351 (BLK/WHT).

Is the repair complete?
—
Go to Step 33
—

11
Repair the open in CKT 350 (BLK).

Is the repair complete?
—
Go to Step 33
—

12
Using a DMM, measure the voltage from DLC terminal 2 to ground.

Is the voltage within the specified range?
10–15 V
Go to Step 15
Go to Step 13

13
Measure the resistance from DLC terminal 2 to ground.

Is the resistance within the specified value?
0-5 Ω
Go to Step 24
Go to Step 14

14
Repair the open in CKT 1807 (PPL) between DLC terminal 2 and C200 terminal A.

Is the repair complete?
—
Go to Step 33
—

15
1. Disconnect C206.
2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 17
Go to Step 16

16
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B5 and B6.

Is the repair complete?
—
Go to Step 33
—

17
1. Disconnect C310.
2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 19
Go to Step 18

18
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B5 and C310 terminal A3.

Is the voltage within the specified range?
10–15 V
Go to Step 33
—

19
1. Reconnect C310.
2. Disconnect C4 of the IP fuse block.
3. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 21
Go to Step 20

20
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between the IP fuse block connector C4 terminal F1 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

21
1. Reconnect C206.
2. Measure the voltage from DLC terminal 2 to ground.
Is the voltage within the specified range?
10–15 V
Go to Step 22
Go to Step 23

22
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between C206 terminal B6 and the IP fuse block connector C1 terminal D12. If OK, replace the IP fuse block.

Is the repair complete?
—
Go to Step 33
—

23
Repair the short to battery positive voltage (B+) in CKT 1807 (PPL) between IP fuse block connector C4 terminal D1 and E1.

Is the repair complete?
—
Go to Step 33
—

24
1. Disconnect C206
2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 26
Go to Step 25

25
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B5 and B6.

Is the repair complete?
—
Go to Step 33
—

26
1. Disconnect C310
2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 28
Go to Step 27

27
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B5 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

28
1. Reconnect C310.
2. Disconnect C4 of the IP fuse block.
3. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 30
Go to Step 29

29
Repair the short to ground in CKT 1807 (PPL) between IP fuse block connector C4 terminal F1 and C310 terminal A3.

Is the repair complete?
—
Go to Step 33
—

30
1. Reconnect C206.
2. Measure the resistance from DLC terminal 2 to ground.
Is the resistance within the specified value?
0-5 Ω
Go to Step 31
Go to Step 32

31
Repair the short to ground in CKT 1807 (PPL) between C206 terminal B6 and IP fuse block connector C1 terminal D12. If OK, replace the IP block block.

Is the repair complete?
—
Go to Step 33
—

32
Repair the short to ground in CKT 1807 (PPL) between IP fuse block connector C4 terminal D1.

Is the repair complete?
—
Go to Step 33
—

33
1. Turn the ignition switch to OFF.
2. Reconnect or install any connectors or components that were disconnected or removed.
3. Turn the ignition switch to ON.
4. Clear any DTCs.
Are all of the DTCs cleared?
—
Go to Diagnostic System Check - Data Link Communications
—

© 2013 General Motors. All rights reserved.

His original format will be even easier to follow.

 

[GMBoy]

I can cut and paste GM service info ANYWHERE but on this site! It used to take but now garbles up for some reason.

Usually I will spend 10 minutes editing it to be readable..but I post a LOT of help on here for people and it's get tiring to edit. That's why I will post and offer it emailed to a BITOG'er and have done such for atleast 30 of us.

 

[Recalculating]

Thanks for the posts gentlemen. Appreciate it.

I'll follow the instructions.

 

[Recalculating]

Follow-up:

After chasing connections, a ScanGauge II connected and gave me a P0341/ camshaft position sensor and it was cleared. Checked the sensor wiring and routing. My original belt and pulley work was nearby.

So for now, problem solved.