ng900cv top diagnosis and troubleshooting.pdf

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PRODUCT INFORMATION
June 5,1997
Route
To: Service Manager
Subject:
Convertible Troubleshooting Guide
As part of the new training course, Convertible Top Adjustments and Updates - CNAA - a
Troubleshooting Guide was produced. Each technician attending this course received his/her
own copy of this document.
Enclosed is the final version of this Troubleshooting Guide for your dealership’s service library.
The information contained in this document is the latest and only information that should be
referenced when working on a 1995- 900 Convertible.
In conjunction with the publication of this Guide, several older bulletins have been supersed-
ed. Please make certain all superseded bulletins are deleted (crossed out/torn out) of your
PSI Supplements. The list of affected bulletins are:
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PSI 08/94-0495 Programming Top Mechanism
(See new PSI 04/97-0758 which gives both ISAT and TECH 2 instructions)
PSI 09/94-0499 Adjustment of Tonneau Cover Latches
PSI 03/95-0554 Improvement to Operation of Top Stack Mechanism
(See new PSI 04/97-0753)
PSI 05/95-0570 Correcting Complaint of Water Leakage at Door Mirror
(See new PSI 04/97-0760)
PSI 10/95-0628 Adjustment of 5th Bow Latch Motor
PSI 02/96-0664 Customer Satisfaction Campaign 428
(See new PSI 04/97-0754)
PSI 02/96-0665 Addressing Customer Complaints of Water Leaks
(See new PSI 04/97-0755)
PSI 07/96-0693 Correcting Customer Complaint that Headliner at First Bow
is Loose or Hanging Down
(See new PSI 04/97-0756)
PSI 1 O/96-071 6 Installing New Fifth Bow Latch Motor Racks
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All technicians who attended the training class will be receiving updated pages for their bind-
ers.
If you require additional copies of this Troubleshooting Guide, please contact a Product In-
formation Specialist at 770-279-6484 or 770-279-6324.
97-17
900 Convertible Top Troubleshooting Guide
Table of Contents
TOPIC
Table of Contents
How to determine if Updates & Campaigns have been performed
Inoperative Top/Operational Problems/Unsatisfactory Performance
Squeaks & Rattles
Water Leaks
SID Messages
Miscellaneous Problems
PAGE
A
B
C-E
F
G
G
H
BULLETINS INCLUDED IN THIS GUIDE:
PSI 04/97-0753 Improvement to Operation of Top Stack Mechanism
PSI 04/97-0754 Customer Satisfaction Campaign 428: Top Mechanism Quality
Improvement
PSI 04/97-0755 Addressing Customer Complaints of Water Leaks
PSI 04/97-0756 Correcting Customer Complaint that Headliner at First Bow is
Loose or Hanging Down
PSI 04/97-0757 New Procedure for Replacement of Convertible Top
PSI 04/97-0758 Programming Top Mechanism (Using ISAT or Tech 2)
MI 811-1758 Customer Satisfaction Campaign 450: Replacement of 5th Bow
Latch Motor Assembly (issued as PSI 04/97-0759 in early issues of Troubleshoot-
ing Guide)
PSI 04/97-0760 Addressing Complaint of Water Leaks from Area Around Door
Mirror
A
06/09/97
900 Convertible Top Troubleshooting Guide
How to determine if Updates & Campaigns have been performed
The
following
chart
includes some quick visual checks you can make to determine if a
particular campaign or update has actually been performed on a 900 Convertible. Note
that this is not a guarantee that all of the steps of a particular PSI or campaign have
been performed.
Old
“19
Point”
Update, see revised PSI 04/97-0753
I
!
3
1
;
Right hand 5th bow latch motor microswitch should be disconnected (gone)
Check for proper ECM - you SHOULD NOT be able to raise the windows while the top is
being
raised. (ECM software version 0402 or higher.)
Look at header switches through opening in header - silver arm and pure white plastic
arm are early versions. Plastic arm on latest switch is an “off white color”.
The 5th bow potentiometer should have a “drive bracket” installed, and the potentiometer
arm should be approx. 3/8” long
The 5th bow motor on the passenger’s side of the car should have a protective plate
installed over the gear, so the wiring harness can’t be damaged by the gear.
Service Campaign #428, see revised PSI 04/97-0754
I
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“2nd bow drive link” installed
2 holes drilled in bottom of front door pockets. (1997 models have the holes drilled differ-
ently from the Factory.)
Customer Satisfaction Campaign 450,5th Bow Latch Motor Update,
see MI 811-1758
(The 5th bow latch motor assembly has been updated as from VIN V7010306 in Fac-
tory production)
1
Round plug in hole over 5th Bow Latch Motor
How to Determine Which Type of Top is Installed on the Convertible you are going
to work on:
1
2
Original M95 900 Top is “ASC”: rear window is glued in place
Later style Top is “CT% rear window is clipped in place.
B
06109197
900 Convertible Top Troubleshooting Guide
Inoperative Top/Operational Problems/Unsatisfactory Performance
(Note that problems are listed in order of top operating sequence, beginning with top fully raised)
PROBLEM
1
Nothing happens when attempting
to lower top (no movement at all,
no noises, etc.)
POSSIBLE CAUSE
a. Top switch on center console
defective
b. Fuse blown
ACTION
See page 1
2
3
First bow raises a few inches and
stops
Fifth bow raises all the way, then
top stops other movement
c. Trunk bag raised?
Fifth Bow latch motor stuck or in-
operative
a. Header Switches closed by
dowel pin
b. 5th bow potentiometer will not
reach high limit
See page 1
See pages 1 - 3
4
c. Tonneau motor disengaged
Tonneau cover catches going up - Latch Adjustment
“snaps” when opening
See page 4
5
6
Grinding, ticking when tonneau
goes up
Top stops l/Z way when lowering
the top
Tonneau motor not fully engaged
a. Missing 2nd bow drive link or
2nd bow binding on fabric
b. Programming
c. Main motor or 5th bow poten-
tiometer faulty
a. Programming
b. 2nd bow catching on fabric
Programming
a. Programming
b. Tonneau motor drive shaft
twisted
a. Programming
b. Twisted Tonneau shaft
c. Bent Tonneau cover hinges
Broken or missing stops on rear
window
See page 4
See pages 5-6
7
Top hesitates when lowering top
Seepages6-7
8
9
Rear window hits rear headrest
when lowering’ top
5th bow hits Tonneau cover
hinges when lowering top
See page 7
See page 7
IO
First bow hits Tonneau cover
when lowering top
See page 8
11
“Snapping” noise from rear as top
is being lowered into “boot”
See page 9
C
06/09/97

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