 |
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 |
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