Bulletin No.:

Service Bulletin

Date:

07-08-67-010C
June, 2019

INFORMATION
Subject:

Retractable Hard Top (RHT)/Convertible Switch Diagnosis (DTC B1296, B3669, B367A,
B376B, B366E, B366D, B366B, B366A, B366F, B1307, B3683, B3685, B366C and/or
B1010)

Models:

2006-2009 Pontiac G6

This Bulletin has been revised to remove references to Service Know-How and Training
videos that are no longer available. This Bulletin replaces PIC4149C. Please discard
Corporate Bulletin Number 07-08-67-010B and PIC4149C.

Do This

Don't Do This

Follow the proper DTC diagnosis.

Do not replace the FTC Module (Labor Operation B3346) or
Hydraulic Pump/Motor (Labor Operation B3460).
Do not repair the Hydraulic Seal/Line Leak (Labor Operation
B3442).

This bulletin address the issue of the convertible top not
cycling open or closed with one or more RHT DTCs set.
When the top is cycle open or closed the Folding Top
Control (FTC) Module looks for a specific sequence of
switching events to take place (refer to the Switch
Status Charts below). If the specific sequence is
interrupted by one of the switches not properly
changing status, the FTC Module will set DTC/s for the
specific switch(es) that did not cycle. The module will
then time out the hydraulic pump/motor and will not
allow further top operation to protect top components
from being damaged.
Important: Once the FTC module times out, it will no
longer allow top operation until the switch that
interrupted the sequence properly changes status
(Note: At times the FTC may allow return of the roof to
its previous position, but normally will not allow
movement past the point at which the switch sequence
was interrupted).
Important: The switch sequence can also be
interrupted by a mechanical binding of the system
latches or a hydraulic system leak. Both of these issues
can cause a switch status not to change and the
system will time out.
DO NOT replace the FTC module or the hydraulic
pump/motor. Instead, follow the diagnostics below.
Use the Tech 2 to identify the DTC(s) and symptom/
descriptor set.

Copyright 2019 General Motors LLC. All Rights Reserved.

Important: Verify that the battery has a full state of
charge (always cycle the top with the engine running).
• If no DTC is set or DTC B1010 is the only DTC
set: Check the DIC for messages (i.e. “Check
Cargo Shade” – the top will not cycle if the cargo
shade is open). If no messages are displayed,
cycle the top open/closed and re-check for DTCs.
If the top operates normally and no DTCs are set,
the condition is not present.
If the Top Operational Switch DTC is set (B3602),
go to Step 1.
Important: The Top Operational Switch is designed to
operate with constant finger pressure. For safety
reasons, the top will stop if the constant pressure is not
present. It is also normal for a slight pause to occur
when resuming top operation with the switch after a
constant pressure interruption has taken place. (No
DTC will be set for this issue. Do not replace the switch
for this normal condition).
• If any of the following Top Switch DTCs are set –
B1296, B3669, B367A, B367B, B366E, B366D,
B366B, B366A, B367F, B1307, B3683, B3685,
B366C and/or B1010 - go to Step 1.
Important: B1010 is a System Sensors Data
Mismatch Signal Invalid DTC and almost always sets
with some other Switch DTC. Diagnose the set
Switch DTC.

Page 2

June, 2019

•

If any Hydraulic Pump/Motor DTC is set, follow the
2008 SI document DTC Descriptors Circuit/
System Testing Diagnosis:
– B3680
– B3674
– B3675
• If any Folding Top Control (FTC) Module DTC is
set, follow the 2008 SI document DTC Descriptors
Circuit/System Testing Diagnosis:
– B1000
– B1325
– B1335
– B1345
– B1395
– B316A
1. Using the Tech 2®, verify the switch for the set
DTC will properly change status when manually
cycled. Note – in some instances the hydraulic
pressure may need to be opened at the pump
(i.e. S1/B1296, S2/B3669, S3/B367A, S4/B367B),
refer to Folding Top Pump Bypass Valve Pressure
Release Adjustment in SI.
Important: Using a Tech 2®, the DTC Diagnostic
Matrix and the Switch Status Charts, you can determine
the status of each switch in any position while the top is
being opened or closed.
• If the switch changes status properly, go to
Step 6.
• If the switch does not change status properly,
go to Step 2.
2. Disconnect the switch for the set DTC. Proceed to
Step 3.
3. Ignition ON, probe the 12-volt reference circuit of
the switch with a test lamp connected to ground.
The test lamp should illuminate. If the test lamp
does illuminate, go to Step 4.
• If the test lamp does not illuminate, test the
12-volt reference circuit for a short to ground
or open.
• If the test lamp does not illuminate and the
circuit is OK, go to Step 5.

Bulletin No.: 07-08-67-010C

4. Probe the signal circuit of the switch with a test
lamp connected to B+. The test lamp should
illuminate. If the test lamp illuminates, go to Step 6.
• If the test lamp does not illuminate, test the
signal circuit for an open or high resistance.
• If the test lamp does not illuminate and circuit is
OK, go to Step 5.
5. Disconnect the FTC module, verify the power and
ground circuits for any short to ground, open or
short to battery. Verify pins/connections,
re-connect the module and the switch and cycle
the top. If the condition is still present, replace the
FTC module.
6. Verify that there is no mechanical binding of the
switch latching system. Note – in some instances,
the hydraulic pressure may need to be opened at
the pump. Refer to Folding Top Pump Bypass
Valve Pressure Release Adjustment in SI. If the
latching system moves freely, go to Step 7.
If the latching system does not move freely, repair
(adjust/replace) the mechanical system
accordingly.
7. Verify there are no hydraulic system leaks.
Remove the trunk trim and check under the spare
tire for signs of fluid leak. If there are no leaks
found, go to Step 8.
If a hydraulic leak is found, repair the damaged
seal/line accordingly.
8. Verify that the switch is adjusted properly
(i.e. S18/B3685 – refer to TAC PIC 4154A). Verify
that the switch has no obstructions in it that would
mechanically prevent the switch from properly
cycling. Verify there is no damaged wiring/
connections from a mis-routed/improperly tie
strapped wire harness or moving parts contacting/
pinching the wire harness when the top is being
cycled open/closed (specifically in the deck lid
reverse open hinge/hold down claws area).
Re-connect the switch and cycle the top. If the
condition is present, replace the switch.
Important: Refer to the DTC Diagnostic Matrix below
for more specific switch information and diagnostic
detail from Steps 1, 2, 3 and 4 above.

B1296

S1

header latch
cylinder

"Folding Top Header
Latched Cylinder" (hall
effect sensor,
header cyl.)

Monitor switch state on
Tech 2 while operating top
switch-should change from
"latched" to "unlatched.”

Check switch attachment
to cylinder body, electrical
connection and wiring.

B3669

S2

rear decklid
4-bar (for reverse
open) cylinder

"RCL Cylinder Extended"
(hall effect sensor,
decklid cyl.)

Monitor switch state on
Tech 2 while operating top
switch-should change from
"no" to "yes.”

Check switch attachment
to cylinder body, electrical
connection and wiring.

"RCL Release Switch"
(RCL lobster claws
switch)

Loosen pressure relief,
move claws manually up
and down, monitor switch
state with Tech 2 should
show "unlatched" in the full
downward position and
"latched" when in the full
upward position, "transition"
anywhere in between.

Check wiring and
connection at rear RCL
hinge.

B367A
B367B

S3/S4

Rear RCL hinge
(one switch)

Bulletin No.: 07-08-67-010C

B366E

B366D

B366B

B366A

B366F

B1307

B3683

B3685

B366C

S9

S10

S11

S12

S13

S14

S17

S18

S19A/B

Front of RH RCL
front hinge

rear of RH RCL
front hinge

front of LH RCL
front hinge

rear of LH RCL
front hinge

RH front
downstack
receiver in trunk

header latch
center drive

LH header
receiver

LH header
receiver

rear holes in RCL
plates

June, 2019

Page 3

"Right Front RCL
Latched Switch"