415-00-4 Audio System — General Information 415-00-4
DIAGNOSIS AND TESTING (CONTINUED)
CONDITIONS
DETAILS/RESULTS/ACTIONS
A4: CHECK THE ACCESSORY SUPPLY FUSE
1 Check fuse 19 (10 A) in the central junction
box (CJB).
• Is fuse 19 (10 A) OK?
Yes
GO TO A5
No
INSTALL a new fuse 19 (10 A). TEST the
system for normal operation. If the fuse
blows again, GO TO A8
A5: CHECK CIRCUIT 29-MD15/74-MD15 AUDIO UNIT SUPPLY
1 Remove the audio unit.
2.
3 Using a digital multimeter, measure the
voltages between the audio unit C52
- pin 1, circuit 29-MD15 (OG/BK)
- pin 3, circuit 74-MD15 (BU/BK)
• Are the voltages 10 volts or greater?
Yes
GO TO A6
No
GO TO A7
A6: CHECK CIRCUIT 91-MD15 AUDIO CONTROL UNIT GROUND
1 Using a digital multimeter, measure the
resistance between the audio unit C52, pin 6,
circuit 91-MD15 (BK/GN) and ground.
• Is the resistance greater than 0.1 ohms?
Yes
REPAIR circuit 91-MD15A (BK/GN) as
appropriate. TEST the system for normal
operation.
No
INSTALL a new audio unit. TEST the sys-
tem for normal operation.
E6747 EN 07/2001 2002 Bantam
To Next Page
Loading...
