STI Home
Diagnostic Manual, Info./Comm., Volume 1

 Printable version
LOCATION:    7.2 Cellular Telephone (CTEL)   >   25 Electrical Test Program - Speaker Test


Electrical Test Program - Speaker Test

Test scope Test connection Test condition Nominal value Possible cause/Remedy
1.0 Model 129
Speakers
 

 

 

 

 

Radio: ON
CTEL: OFF
Radio audio is heard through all speakers.
2.0
2.0 Model 129
Audio switchover relay
module (A35/2)
Wiring

 

 

 

 

 

 

Check for proper connection of relay harness.
Radio audio is heard through all speakers. 2.1
2.1 Wiring

 

 

 

 

 

 

Ignition: ON
Radio: OFF
CTEL: ON
Press C (clear) to generate an audio tone.
CTEL audio is heard through left front door speaker group (H4/1) and left front speaker (H4/9).
2.2
2.2 Voltage supply
Circuit 30

2
X39/20


1
Ignition: ON
Radio: ON
CTEL: ON
Do not disconnect X39/20. Take reading from back of connector.
11 - 14 V Nominal value OK: 2.5

Nominal value not OK:
Wiring,
Fuse (F22/2-1).
2.3 Voltage supply
Control voltage



X39/23
1
Do not disconnect X39/23. Take reading from back of connector.
11 - 14 V Nominal value OK: 2.5

Nominal value not OK:
Wiring.
2.4 Control voltage
2
X39/20


3
Enter 611
Press SND .
< 1 V Nominal value OK: 2.5

Nominal value not OK:
26
2.5 Model 129
Audio switchover relay
module (A35/2)

 

 

 

 

 

 

Install known good relay. Audio returns. Audio: Replace A35/2.

No audio: Replace relay harness.
3.0 Model 129
CTEL junction box (X39/11)

 

 

 

 

 

 

Disconnect speaker wire connector (2) from X39/11. Connect test headset to X39/11 at connector 2.
Press C (clear) to generate an audio tone.
Audio tone heard over test headset. Nominal value OK: 2.5

Nominal value not OK: 3.1
3.1  

 

 

 

 

 

 

Connect test headset to test point #2.
Press C (clear) to generate an audio tone.
Audio tone heard over test headset. Nominal value okay: Replace X39/11

Nominal value not OK: 27
4.0 Model 140
Speakers
 

 

 

 

 

Ignition: ON
Radio: OFF
CTEL: ON
Connect test headset to CTEL speaker harness.
Press IDC keys to generate an audio tone.
Keytone audio is heard through headset.
Nominal value OK:
Speakers,
Wiring.

Nominal value not OK: 4.1
4.1 Wiring

 

 

 

 

 

 

Disconnect speaker output wiring from X39/11. Connect to test headset.
Press IDC keys to generate an audio tone.
Keytone audio is heard through headset Nominal value OK: Wiring.

Nominal value not OK: 5.0
5.0 Model 140
CTEL junction box (X39/11)

 

 

 

 

 

 

Connect test headset to test point #2.
Press IDC keys to generate an audio tone.
Audio tone heard over test headset. Nominal value OK: Replace X39/11

Nominal value not OK: 27