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#2596070 - 04/10/12 10:00 PM Need help on Buick Rendezvous & Best Code analyzer
jetmech1 Offline


Registered: 12/27/11
Posts: 126
Loc: SW Missouri
Sorry, this is going to be quite long:

My daughter-in-law's Buick Rendevous (3.4 AWD) is dead. It has a no crank problem. I've never ran into this before and my GM experience has only been with OBD-I. Most of my OBD-2 has been on my Blue Ovals and those were simple fixes (O-2 sensors etc.)

Here is what I have done so far:

Engine will not crank:

Checked battery and found nearly dead cells. Replaced battery.

Still no crank. Unable to hear starter relay engage. Unable to get under vehicle to physically confirm if power reaching starter, but I'm reasonably confident it's not.

Fuel pump will not energize (no 2 second pre-pressurization when key turned on).

Checked for fuel pressure on fuel rail. No pressure at Schrader valve.

Checked all fuses on affected circuits as best as possible with available tester.

Swapped identical relays from one system to another in order to isolate fault. No help. Returned relays to original positions.

When key turned on, odometer will come up with miles and then read "error".

Theft prevention light is not flashing.

Seems as if the theft prevention system is holding out fuel pump relays and starter circuit.

Need to obtain code reader for any other analysis...........

Note: Her Uncle came over and used his code reader (don't know what he had) and said that the computer wouldn't communicate with his reader??? That didn't sound right to me as I am under the impression that even a dead computer would throw a code. I'm pretty sure this vehicle has a body computer also.

Now for the code reader. I need to spring for a new one anyway for my own use. I want one that does more than just read a code. The Equus Innova 3160b seems to fit the bill pretty well. It has live data and other features. Snap-On won't be an option as whatever I get will have to be E-tailed through Amazon or other online vendors.

I would really appreciate any imput on a diagnostic reader AND where do I go from here on this Buick?!?! Has anyone here experienced this condition?? Thanks to all!!!!!!!

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#2596075 - 04/10/12 10:06 PM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
The_Eric Offline


Registered: 03/31/10
Posts: 3237
Loc: Iowa
Unfortunately, if you are going to retrieve any body (BCM) codes, you'll need a better equipped scan tool. The BCM is where you'll find any codes for anti theft or passlock issues.
_________________________
2001 Hyundai Elantra 2.0
1998 Chevy Malibu 2.4
1995 Pontiac Grand Am 3.1
1979 Ford F-150 351M

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#2596079 - 04/10/12 10:09 PM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: The_Eric]
jetmech1 Offline


Registered: 12/27/11
Posts: 126
Loc: SW Missouri
Does it connect to the same OBD-2 port on the drivers side? Does anyone even offer a diagnostic reader for BCM codes that's affordable?

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#2596185 - 04/11/12 12:16 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
user52165 Offline


Registered: 10/21/11
Posts: 727
Loc: CA
Always do the easy stuff first. Clean and tight battery terminals? Good battery/starter cable?

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#2596203 - 04/11/12 01:06 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
JasonC Offline


Registered: 12/06/06
Posts: 402
Loc: Lynchburg, Va
If the OBD II reader can't communicate with the ECM, the ECM may be fried.
_________________________
1981 Turbo Trans Am
2004 Ford Mustang Cobra
2009 Dodge Challenger SRT8 Procharged
2012 Dodge Charger R/T Max
2014 Dodge Charger R/T Plus 100th Ann. Ed.

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#2596204 - 04/11/12 01:30 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: JasonC]
user52165 Offline


Registered: 10/21/11
Posts: 727
Loc: CA
Originally Posted By: JasonC
If the OBD II reader can't communicate with the ECM, the ECM may be fried.


That is very, very rare. Poor connection, bad pins, dirty contacts, bad wiring, etc are more likely IF it is even an ECM issue.


Edited by user52165 (04/11/12 01:30 AM)

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#2596212 - 04/11/12 02:02 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: user52165]
jetmech1 Offline


Registered: 12/27/11
Posts: 126
Loc: SW Missouri
All the easy stuff has been done. New premium battery installed. All connections clean. Additional online research is showing that these GM's had a lot of BCM failures/issues. If the BCM is fried, will that hold out the passlock (anti-theft) system and keep it from cranking?? I don't think it an ECM issue. Won't the engine still crank and run in closed loop on it's closed loop presets even with an inop ECM?


Edited by jetmech1 (04/11/12 02:04 AM)

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#2596240 - 04/11/12 04:52 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
Merkava_4 Offline


Registered: 01/30/07
Posts: 9113
Loc: Clovis, CA
Originally Posted By: jetmech1
The Equus Innova 3160b seems to fit the bill pretty well. It has live data and other features.


Innova makes very nice code readers and they're built very robustly.

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#2596260 - 04/11/12 06:12 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
Hirev Offline


Registered: 01/18/03
Posts: 1198
Loc: Oregon
Don't know what year Buick were talking about so about all I can say is most likely your GM PassLock system has issues.
_________________________
------
2006 Toyota Tundra, 2007 Corvette, 2009 Scion TC,
2001 KTM 380EXC, 2005 Yamaha FZ1, 2006 Honda 919, 2013 Honda CRF250L, 2013 Yamaha FZ6R

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#2596418 - 04/11/12 10:47 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: Hirev]
jetmech1 Offline


Registered: 12/27/11
Posts: 126
Loc: SW Missouri
OOOPS Sorry. Thought I listed it.

It's a 2003.

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#2596477 - 04/11/12 11:28 AM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
GMBoy Offline


Registered: 11/22/04
Posts: 6632
Loc: Texas
Ok. Here is a copy/paste direct from GM Service Information for the symptom "starter solonoid does not click" which I think is basically what you are saying. If you wish, I can email this to you where it is more easily viewed.

Main points in this paper are to check your Neutral safety switch...so..try staring the vehicle in Neutral as apposed to park. You may luck out there. It also mentions your ignition switch as well as, sadly, PCM replacement. But also a lot about poor connections incl to the starter.

SORRY ABOUT HOW THE CUT AND PASTES SHOW UP!! I cannot get it to show properly - it really is a simple yes/no question format but looks awful here. Emailing it is the only way.






xTooltipElement
Service Information
2003 Buick Rendezvous - FWD | Aztek, Rendezvous VIN A/B Service Manual | Document ID: 854066
--------------------------------------------------------------------------------

Starter Solenoid Does Not Click


Step



Action



Yes



No




Schematic Reference: Starting and Charging Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems



1


Did you perform the Engine Electrical Diagnostic System Check?


Go to Step 2


Go to Diagnostic System Check - Engine Electrical



2


Turn the ignition switch to the START position.

Does the engine crank?


Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems


Go to Step 3



3


Important: A flashing or illuminated security lamp indicates a theft deterrent malfunction. A theft deterrent malfunction may disable starter operation.
Is the security lamp flashing?



Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent


Go to Step 4



4



1. Install a scan tool.

2. Turn ON the ignition, with the engine OFF.

3. With a scan tool, observe the Crank Request Signal parameter in the powertrain control module (PCM) data list.

4. Turn the ignition switch to the START position.


Does the scan tool display Yes?


Go to Step 5


Go to Step 14



5


Turn the ignition switch to the START position.

Does the Starter relay click?


Go to Step 6


Go to Step 9



6



1. Turn OFF the ignition.

2. Disconnect the Starter relay.

3. Connect a test lamp between the battery positive voltage circuit of the Starter relay switch circuit and a good ground.


Does the test lamp illuminate?


Go to Step 7


Go to Step 25



7


Connect a 30-amp fused jumper between the battery positive voltage circuit of the Starter relay switch circuit and the supply voltage circuit of the starter solenoid.

Does the engine crank?


Go to Step 19


Go to Step 8



8


Does the fuse in the jumper open?


Go to Step 15


Go to Step 16



9



1. Turn OFF the ignition.

2. Disconnect the Starter relay.

3. Turn ON the ignition, with the engine OFF.

4. Connect a test lamp between the battery positive voltage circuit of the Starter relay coil and a good ground.


Does the test lamp illuminate?


Go to Step 10


Go to Step 12



10



1. Connect a test lamp between the battery positive voltage circuit of the Starter relay coil and the control circuit of the Starter relay.

2. Turn the ignition ON, with the engine OFF.


Does the test lamp illuminate?


Go to Step 26


Go to Step 11



11


Turn the ignition to the START position.

Does the test lamp illuminate?


Go to Step 19


Go to Step 17



12



1. Turn OFF the ignition.

2. Disconnect the park neutral position (PNP) switch.

3. Connect a 3-amp fused jumper between the PNP switch signal circuit and the ignition 1 voltage circuit of the PNP switch.

4. Turn ON the ignition, with the engine OFF.


Does the test lamp illuminate?


Go to Step 20


Go to Step 13



13


Connect a test lamp between the ignition 1 voltage circuit of the PNP switch and a good ground.

Does the test lamp illuminate?


Go to Step 27


Go to Step 28



14



1. Turn OFF the ignition.

2. Disconnect the PCM.

3. Connect a test lamp between the crank request signal circuit of the PCM and a good ground.

4. Turn the ignition to the start position


Does the test lamp illuminate?


Go to Step 22


Go to Step 18



15


Test the supply voltage circuit of the starter solenoid for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 23



16


Test the supply voltage circuit of the starter solenoid for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 23



17


Test the control circuit of the Starter relay for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 22



18


Test the crank request circuit of the PCM for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 24



19


Inspect for poor connections at the Starter relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 29



20


Inspect the PNP switch for proper operation.

Did you find and correct the condition?


Go to Step 34


Go to Step 21



21


Inspect for poor connection at the PNP switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 30



22


Inspect for poor connections at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 31



23


Inspect for poor connections at the starter solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 32



24


Inspect for poor connections at the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?


Go to Step 34


Go to Step 33



25


Repair the high resistance or open in the battery positive voltage circuit of the Starter relay switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?


Go to Step 34






26


Repair the short to ground in the control circuit of the Starter relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?


Go to Step 34






27


Repair the high resistance or open in the park/neutral signal circuit of the PNP switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?


Go to Step 34






28


Repair the high resistance or open in the ignition 1 circuit of the PNP switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?


Go to Step 34






29


Replace the Starter relay.

Did you complete the replacement?


Go to Step 34






30


Replace the neutral safety switch.

Did you complete the replacement?


Go to Step 34






31


Important: Perform the set up procedures for the PCM.
Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 3.4L.

Did you complete the replacement?



Go to Step 34






32


Replace the starter motor. Refer to Starter Replacement .

Did you complete the replacement?


Go to Step 34






33


Replace the ignition switch. Refer to Ignition and Start Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?


Go to Step 34






34


Operate the system in order to verify the repair.

Did you correct the condition?


System OK


Go to Step 2




2012 General Motors.


Edited by GMBoy (04/11/12 11:30 AM)

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#2596519 - 04/11/12 12:02 PM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: GMBoy]
jetmech1 Offline


Registered: 12/27/11
Posts: 126
Loc: SW Missouri
Thanks GMBoy. I am sending you a PM with my email. Much appreciated.

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#2596654 - 04/11/12 02:36 PM Re: Need help on Buick Rendezvous & Best Code analyzer [Re: jetmech1]
GMBoy Offline


Registered: 11/22/04
Posts: 6632
Loc: Texas
Originally Posted By: jetmech1
Thanks GMBoy. I am sending you a PM with my email. Much appreciated.


No problem - email sent.

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