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

 Printable version
LOCATION:    7.2 Cellular Telephone (CTEL)   >   24 Electrical Test Program - Antenna Test


Electrical Test Program - Antenna Test

If customer complaint is limited to a specific geographic location or condition, explain limitations of CTEL (radio-telephone) to customer.

If customer complaint is regarding chronic static or frequently dropped calls, which are not limited to a specific geographic area, contact carrier.

Test scope Test connection Test condition Nominal value Possible cause/Remedy
1.0 Antenna
Ground
 

 

 

 

 

Ignition: OFF
Radio: OFF
CTEL: OFF
Known good service area.
Temporarily disconnect Radio and Telefon connection coax cables from antenna splitter (A28/1).
< 0.3 Loosen lower antenna mounting bracket. Tighten mast tube until resistance is < 0.3 . Retighten lower bracket. Reconnect coax cables.
1.1 Cable  

 

 

 

 

Disconnect antenna coax cable from A28/1 and TR (A35).
Replace with known good cable.
indicator does not come on.


Reception and quality improve.
Indicator stays ON: 1.2.

Indicator goes OFF: Replace antenna coax cable.

Reception does not improves:
1.2

Reception improves: Replace antenna coax cable.
1.2 Cable  

 

 

 

 

Disconnect antenna coax cable from A35.
Connect magnetic mont test antenna to A35. Place test antenna on trunk lid with lid closed.
  Indicator stays ON: contact arrier.
Indicator goes OFF: Replace antenna.
2.0 Antenna
Radio control
 

 

 

 

 

Ignition: ON
Radio: Cycle ON/OFF
CTEL: OFF
Antenna extends and retracts with cycling of radio.
2.1
2.1 Radio control  

 

 

 

 

Disconnect antenna control wire from junction box (X39/11) and antenna.
Radio: Cycle ON/OFF
CTEL: OFF
Antenna extends and retracts with cycling of radio. Nominal value OK: 2.3.

Nominal value not okay: see DM, Vol. 3, Drivetrain, Body & Accessories Electrical, Chassis & Body EB-02.06.
2.2 CTEL control  

 

 

 

 

CTEL: Cycle ON/OFF
Radio: OFF
Antenna extends and retracts with cycling of CTEL.
2.3
2.3 CTEL control

M11
3
CTEL: ON

CTEL: OFF
11 - 14 V

< 1 V
Nominal values OK: Replace antenna.

Nominal values not OK: Replace X39/11.