back up assist
- Thread starter stevep
- Start date
Steelcity
Member
steve I have the same problem with my back up assist : did you try and clean your sensors on the back of the bumper ? There is a paragraph in the owners manual that describes this.Hope this helps.
Steelcity
Member
Steve check out this link this will help us both
http://www.justanswer.com/pontiac/3zqzz-diagnose-rear-backup-sensor-2003-pontiac.html
http://www.justanswer.com/pontiac/3zqzz-diagnose-rear-backup-sensor-2003-pontiac.html
Steelcity
Member
steve I just found this info about our back up assist problem : edit:: click on link above to read chart for some reason the copy and paste did not work so good
2003 Pontiac Montana Ext. | Montana, Silhouette, Venture (VIN U) Service Manual | Body and Accessories | Rear Parking Assist | Diagnostic Information and Procedures | Document ID: 762997
Diagnostic Trouble Code (DTC) Displaying
This vehicle is equipped with an on-board diagnostic display feature capable of displaying diagnostic trouble codes using the 3 indicators on the rear parking assist display. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the URPA system under this condition.
In order to enter the diagnostic mode, complete the following actions:
1. With the ignition turned OFF short the rear parking assist diagnostic connector to ground while the vehicle is in PARK. Refer to Rear Parking Assist Component Views for the location of the rear parking assist diagnostic connector.
2. Turn the ignition ON.
3. Place foot on the brake.
4. Shift the vehicle into REVERSE within 5 seconds.
If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON, the diagnostic mode will still be initiated. However, a reverse input wiring fault will be registered as sequence #7 as shown in the Diagnostic Indicator table below. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes. After the reverse input wiring code is cleared, repeat the diagnostic trouble code displaying steps in order to enter the diagnostic mode.
When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes.
Diagnostic Indicators
State/Fault Location
Amber Outside
Amber Middle
Red Outside
Flashing
1 Start of Diagnostics
2 RR Corner Object Sensor and Wiring
3 RR Middle Object Sensor and Wiring
4 LR Middle Object Sensor and Wiring
5 LR Corner Object Sensor and Wiring
6 Chime Warning Wiring
7 Reverse Input Wiring
8 Important: This diagnostic pattern sets for an open sensor supply voltage circuit and sensor low reference circuit.
Sensor Supply Voltage Circuit and Sensor Low Reference Circuit
Flashes in the following sequence:
1. Amber Outside
2. Amber Outside and Amber Middle
3. Amber Middle and Red Outside
4. Red Outside
9 Important: This diagnostic pattern sets for a short to ground in the sensor supply voltage circuit.
Sensor Supply Voltage Circuit
© 2010 General Motors. All rights reserved.
Attachments are only available to registered users.
Register Here
Edited by Bill on 9/14/2010 at 9:58 AM EST
Posted by Bill 98 days and 7 hours ago.
Expert's Answer
Hope that helps... It is almost always one of the sensors in the bumper. If you're completely satisfied please click accept... If you need further assistance, ask away!
96 days and 10 hours ago.
Customer Reply
Bill,
Thanks for the prompt response!
From the picture how do I determine where the "Diagnostic Connector" is?
I suspect it is #2 but want to confirm.
PS: Most of the pictures in your response show as broXXX XXnks so I am not sure if there is other information you provided.
Posted by Bill 96 days and 6 hours ago.
Expert's Answer
My apologies for the picture issue. I'm having a little trouble with that but I did add the picture on the bottom. The diagnostic connector is in the left rear corner of the vehicle. The picture shows it as a harness coming off the park assist module and it is labeled as "2" in the picture. Hope that info is helpful!
Edited by Bill on 9/16/2010 at 10:27 AM EST
94 days and 8 hours ago.
Customer Reply
The picture was confusing. I tore open the driver side of the vehicle and could not find the sensor. Located it on the passenger side.
Anyway the code I get is the middle amber and red outside which indicates the "LR Middle object Sensor and wiring". So from the perspective of this diagnostic, which is Left and which is right? I am sure if I guess, murphys law will prevail and I will get the wrong sensor.
Accepted Answer
My apologies for the confusing picture. I'm afraid we deal with confusing or misleading service information every day. As far as the sensors go... left is left and right is right. What you might try is swapping (for example) your two center sensors, cycling the ignition key and rechecking the fault code. See if it follows the sensor to the RR sensor. It's possible to have a wiring issue or a failure in the module itself but it is almost always one of the sensors themselves. I've replaced many... never a module.
Picture
Expert: Bill
Pos. Feedback: 100.0 %
Accepts: 60
Answered: 9/18/2010
Pontiac Technician
GM Certified Master Technician
Ask this Expert a Question >
2003 Pontiac Montana Ext. | Montana, Silhouette, Venture (VIN U) Service Manual | Body and Accessories | Rear Parking Assist | Diagnostic Information and Procedures | Document ID: 762997
Diagnostic Trouble Code (DTC) Displaying
This vehicle is equipped with an on-board diagnostic display feature capable of displaying diagnostic trouble codes using the 3 indicators on the rear parking assist display. After the bulb check has been completed, the red outside indicator flashes to indicate a malfunction with the system. The module disables operation of the URPA system under this condition.
In order to enter the diagnostic mode, complete the following actions:
1. With the ignition turned OFF short the rear parking assist diagnostic connector to ground while the vehicle is in PARK. Refer to Rear Parking Assist Component Views for the location of the rear parking assist diagnostic connector.
2. Turn the ignition ON.
3. Place foot on the brake.
4. Shift the vehicle into REVERSE within 5 seconds.
If the vehicle is not shifted into reverse within 5 seconds after turning the ignition ON, the diagnostic mode will still be initiated. However, a reverse input wiring fault will be registered as sequence #7 as shown in the Diagnostic Indicator table below. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes. After the reverse input wiring code is cleared, repeat the diagnostic trouble code displaying steps in order to enter the diagnostic mode.
When the diagnostic mode is first entered, the rear parking assist display displays the amber outside indicator and the red outside indicator. Then the indicators on the rear parking assist display will display one or more of the sequences in the table below to indicate where the fault exists within the rear parking assist system. Refer to Diagnostic Trouble Code (DTC) Clearing for the specific steps on how to clear diagnostic trouble codes.
Diagnostic Indicators
State/Fault Location
Amber Outside
Amber Middle
Red Outside
Flashing
1 Start of Diagnostics
2 RR Corner Object Sensor and Wiring
3 RR Middle Object Sensor and Wiring
4 LR Middle Object Sensor and Wiring
5 LR Corner Object Sensor and Wiring
6 Chime Warning Wiring
7 Reverse Input Wiring
8 Important: This diagnostic pattern sets for an open sensor supply voltage circuit and sensor low reference circuit.
Sensor Supply Voltage Circuit and Sensor Low Reference Circuit
Flashes in the following sequence:
1. Amber Outside
2. Amber Outside and Amber Middle
3. Amber Middle and Red Outside
4. Red Outside
9 Important: This diagnostic pattern sets for a short to ground in the sensor supply voltage circuit.
Sensor Supply Voltage Circuit
© 2010 General Motors. All rights reserved.
Attachments are only available to registered users.
Register Here
Edited by Bill on 9/14/2010 at 9:58 AM EST
Posted by Bill 98 days and 7 hours ago.
Expert's Answer
Hope that helps... It is almost always one of the sensors in the bumper. If you're completely satisfied please click accept... If you need further assistance, ask away!
96 days and 10 hours ago.
Customer Reply
Bill,
Thanks for the prompt response!
From the picture how do I determine where the "Diagnostic Connector" is?
I suspect it is #2 but want to confirm.
PS: Most of the pictures in your response show as broXXX XXnks so I am not sure if there is other information you provided.
Posted by Bill 96 days and 6 hours ago.
Expert's Answer
My apologies for the picture issue. I'm having a little trouble with that but I did add the picture on the bottom. The diagnostic connector is in the left rear corner of the vehicle. The picture shows it as a harness coming off the park assist module and it is labeled as "2" in the picture. Hope that info is helpful!
Edited by Bill on 9/16/2010 at 10:27 AM EST
94 days and 8 hours ago.
Customer Reply
The picture was confusing. I tore open the driver side of the vehicle and could not find the sensor. Located it on the passenger side.
Anyway the code I get is the middle amber and red outside which indicates the "LR Middle object Sensor and wiring". So from the perspective of this diagnostic, which is Left and which is right? I am sure if I guess, murphys law will prevail and I will get the wrong sensor.
Accepted Answer
My apologies for the confusing picture. I'm afraid we deal with confusing or misleading service information every day. As far as the sensors go... left is left and right is right. What you might try is swapping (for example) your two center sensors, cycling the ignition key and rechecking the fault code. See if it follows the sensor to the RR sensor. It's possible to have a wiring issue or a failure in the module itself but it is almost always one of the sensors themselves. I've replaced many... never a module.
Picture
Expert: Bill
Pos. Feedback: 100.0 %
Accepts: 60
Answered: 9/18/2010
Pontiac Technician
GM Certified Master Technician
Ask this Expert a Question >
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Last edited:
Steelcity
Member
update: In order to help troubleshoot the back up sensors :Turn key to the run position DO NOT START VANapply parking brake then put gear selector in reverse then with a stethoscope listen to each sensor for a ticking sound or clicking sound ,once you hear a dead one, that is your bad sensor.Most likely with a blinking red light it is a bad sensor.