GMC Chevrolet Camaro 1998 Service Manual page 692

8-450 Body Control System Body and Accessories
DTC 22/32 Courtesy Lamps Return Shorted to Battery (Convertible)
r-------------------------,~~
I
I Control
I
Courtesy Courtesy
I
Module
I
=~ ~:
I
(BCM)
L-------------------------J
D1C3
EC2
~
0.8 DK BLU/WHT 149
S317 0.8 DK BLU/WHT 6241
149
0.8 DK BLU/WHT 149
0.8
0.8
DKBLU/ 149
WHT
DK BLU/WHT 149
E3 C200D
3
C200C
0.35
WHT
0.8
DKBLU/ 149
WHT
A
A
B
~LHRear
Courtesy
Lamp
iConvenlblej
156 B
0.5WHT
0.35WHT
156
0.35WHT
o.a
DK BLU/WHT
Rear
Compartment
Lamp
I
Converliblej
A
149
~ ; B
jeoupej
RH Rear
8
Courtesy
Lamp
jeonverttblei
156
$247
0.5WHT
156
156
A
0.8 DK BLU/WHT 149
IP
Compartment
Lamp
(Cloeed with
IP ,;ompartment
door open)
A
c
B
~
Ll:!I
Inside
Rearview
Mirror
E10
C200D
10
C200C
0.8 BLK 650
0.35 WHT
156
0.5 BLK 750
Circuit Description
The following inputs command the body control
module (BCM) to provide a ground path to the courtesy
lamps through CKT 156 to S247:
• The instrument panel. (IP) dimmer switch input
• The right or left side door lock input
• The right or left door jamb switch
• The rear compartment lid ajar indication switch
S247 distributes the ground to the following
components:
• The right and left rear courtesy lamps
• The rear compartment lamp
• The courtesy/reading lamps
8216 - - - - - -
'l
3 BLK
650
Ground
Dletribulion
Cell14
8217
______ !
3
BLK 650
...,.
__ _
(,----------------------'
G200
Conditions for Setting the DTC
S220
361770
CKT 156 (courtesy lamps return) is shorted to B+ for
greater than 50 milliseconds, while the BCM is
attempting to ground the circuit. The BCM grounds
CKT 156 if one of the following actions occurs:
• Either door is opened.
• The rear compartment lid is opened.
• The IP dimmer switch is turned on.
Action Taken When the DTC Sets
• DTC 22 will set.
• There is no courtesy lighting in the vehicle.
• The IP dimmer switch is inoperative.
• The console compartment and the IP compartment
lamps operate normally.
• The BCM will read out a series of flash codes
upon entering the diagnostic mode.
(
(