NHTSA ID Number: 10171914
Manufacturer Communication Number: SB54-148
TSB/Document Date: 2020-03-03
Summary
Service Bulletin for Radio and Integrated Thin-Film Antenna Troubleshooting and Field Service Updates. The New Cascadia has been added to the affected model list.
1
A
07/30/2001
A.
1.
2.
3.
f542870a
Route along main dash harness channel to radio.
CD Changer Harness
Overhead Storage Liner
CD Changer
Fig. 17, CD Changer Harness Routing
Warranty
This is an informational bulletin only; warranty does not apply.
Attachment (Quick Reference Sheets)
See attached Quick Reference Sheets Stereo System Wiring Diagram and Troubleshooting Symptoms.
Page 32
Freightliner
Service Bulletin, 2/21/20
L.F.
MIDRANGE
D
E
F
C
B
A
B
D
95AR−
95AL−
A
C
A
B
C
A
B
STEREO C
CONN.
F
E
D
295E
GRD
DOOR
CONNECTOR
95F−
95F+
C D
B E
A F
STEREO CONN (C)
95WR−
95WR+
95WR+
95WL−
L
R
A
B
C
F
E
D
RF
MIDRANGE
95F−
RF
TWEETER
95F+
PDM
SUB
WOOFER
ASSY
SEE STEREO JUMPER HARNESS
SUB
AMP
f542868b
R.R.
MIDRANGE
Note: Many problems are the result of poor connections.
Check connectors before replacing components.
SEE AMPLIFIER/SUB WOOFER
WIRING DIAGRAM
95 WR+
95WR−
95WL−
95WL+
295E
GRD
A B
(B)
DOOR
CONNECTOR
F
95 F−
E
D 95 F+
95AR+
95AL+
95AL−
STEREO SYSTEM WIRING DIAGRAM
AUX VOL
CTRL CONN
95AR+
295E
95AR+ 95AR−
95AL−
L.F.
TWEETER
95AL+
95AL+
95AR−
L.R.
MIDRANGE
08/03/2001
Symptom:
"Focus" Message
"No CDX"
Message
"Comm Error"
Message
CD Changer Skips
Subwoofer(s) Not
Working
All Speakers Not
Working
Rear Speaker(s)
Not Working
Radio Does Not
Turn On (OR
Turns On Then
Quickly Turns Off)
Front Speaker(s)
Not Working
Poor Reception
Poor ground between antenna and
radio.
Improper coax cable, incorrect cable
routing, loose connections, or faulty
coax cable.
High resistance in radio ground
circuit.
Non−OEM antenna installed.
Faulty multiplexer (RAMI antenna
only).
Weak radio signal in area where
poor reception occurs.
Faulty antenna.
Faulty radio.
Faulty circuit breaker or wiring
supplying voltage to the radio.
Faulty radio ground circuit.
Faulty radio.
Faulty speaker wiring (open or
shorted together).
Faulty Speaker.
Faulty radio.
Faulty speaker wiring (open or
shorted together).
Faulty Speaker.
Faulty auxiliary volume control.
Faulty radio.
Speaker lead(s) shorted to ground. If
a fault is found, give the radio ample
time to cool and restore audio output.
Faulty radio.
Faulty circuit breaker or wiring
supplying voltage to amplifier.
Faulty speaker leads.
Faulty Speaker.
Faulty rear speaker audio input
wiring to amplifier.
Faulty amplifier.
Faulty radio.
Incorrect damping setting for
mounting location.
Faulty CD or CD changer.
Faulty E&C data wiring.
Faulty radio.
Faulty CD changer.
CD changer harness not plugged in
properly.
No power to CD changer from radio.
Faulty CD changer ground circuit.
Faulty radio.
Faulty CD changer.
CD inserted upside−down in CD
changer.
Condensation on CD.
Faulty CD changer.
Possible Cause:
Symptom:
3−10
2−10
0−1 VAC
Speaker Resistance
Subwoofer Speaker Resistance
Front OR Rear Speaker Output Voltage
(backprobing speaker outputs at back of
radio connector with a blank station and
comfortable volume)
E&C Databus Voltage
Ground Voltage Drop (radio metal case to
negative battery post with radio on)
Antenna cable resistance at back of radio
(center pin to outer ring)
Antenna cable resistance at back of radio
with radio ground disconnected (measured
from metal case of radio to good ground)
Coax cable resistance entire length (center
pin to center pin)
0 to 3.5 Ohms
(Max)
Variable VAC
0 to 0.25 VDC
(Max)
Greater than
10,000 Ohms
Less than 0.2
Ohms
Acceptable
Range:
Faulty cassett tape.
Cassette player requires cleaning.
Faulty cassett player.
Faulty cassett tape.
Faulty cassett player.
CD has played all the way through.
Faulty CD player if CD ejects
immediately after inserting.
Faulty CD.
Faulty CD player.
Faulty CD.
CD too cold, condensation forms.
Faulty CD player.
CD inserted upside−down.
Faulty CD player.
Faulty cassett tape.
Faulty cassett player.
Cassette player requires cleaning.
No CD in CD changer.
Faulty CD changer.
No power to CD changer from radio.
Faulty CD changer ground circuit.
Faulty radio.
Faulty CD changer.
Possible Cause:
Circuit Tests:
Tape Player
Inoperative OR
Obstructed
"Load" Message
"Tracking"
Message
"Bad Tape"
Message
"TP Clean"
Message
Tape Plays Weak
OR Slow
CD Player Skips
OR Mutes
"ERR" Message
CD Changer Does
Not Eject OR
Does Not Initialize
When the CD is
Reinstalled
CD Player Ejects
Unexpectedly
"No CD" Message
Pin
5
6
Desc
10
11
12
13
14
15
16
Pin
LEFT
RIGHT
SPEAKER
OUTPUTS
FROM RADIO
L+IN
B5
B1
A1
Amplifier Schematic
B2
B3
B4
A2
A3
A4
A5
B6
B7
A7
A6
B8
A8
1
B9
A9
B10
CONNECTOR P/N’S TBD
A10
B12
B11
L−IN
R−IN
29
30
31
32
33
34
35
36
CONNECTOR P/N 12110088
Desc
Left Audio
E & C Data (databus)
+12V Battery
Right Audio
Not Used
Ground
Audio Common
Not Used
Pin
A12
R+IN
Desc
RIGHT − OUT
RIGHT −
LEFT −
LEFT +
f040499
BUNK SPEAKERS
RIGHT+
L+
L+ OUT
L− OUT
RIGHT + OUT
R+
Right Rear Speaker −
Right Front Speaker +
Right Front Speaker −
Left Front Speaker +
Left Front Speaker −
Left Rear Speaker +
Left Rear Speaker −
CD CHANGER RADIO CONNECTOR
(VIEW TOWARD BACK OF RADIO)
30 33 36
31 34
29 32 35
Not Used
+12V Ignition
Not Used
Dimmer Input
+12V Battery
Ground
Right Rear Speaker +
A11
GND
8
7
RADIO CONNECTOR
(VIEW TOWARD BACK OF RADIO)
3
4
1
2
BATT
1−3
4
5
6
7
8
9
9 11 13 15
10 12 14 16
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TSB/Document ID: SB54-148
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
MFR Component System:
MFR Component Subsystem:
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