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HOMESERVICE MANUALSSAAB1994900 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESINTEGRATED CENTRAL ELECTRONICS (ICE)SYSTEM TESTS - MISCELLANEOUSELECTRICALLY HEATED REAR WINDOW
1994 Saab 900 Base, Standard

Electrically Heated Rear Window

1994 Saab 900 Base, StandardSECTION Electrically Heated Rear Window
  1. Check that the fuses for the electrically heated rear window's relay are intact and for the air conditioning system or the control panel for heating/ventilation and that there is voltage to the fuses. See Fig 1 .
  2. Connect ISAT and select "READ FAULT CODES" on the menu. If any fault codes are stored, diagnose and repair cause of code before continuing.
    3. NOTE: "READ SWITCHES" can only be done in cars with a manual ventilator fan, as the voltage in the ACC is only one pulse.
  3. Select "READ SWITCHES" on the menu followed by "REAR WINDOW HEATER". Read on the ISAT display when the rear window's switch is activated. If this does not work, check the wiring between the ACC or the heating/ventilation panel and pin 66 in the ICE connector for any open circuits/short circuits.
  4. Disconnect the electrically heated rear window's connectors; the electrically heated rear window should still be activated. There should be 12 V between one of the contacts and a safe grounding point. Check the grounding of the electrically heated rear window. The resistance should be less than 1 ohm between the other contact and a safe grounding point.
  5. If results in step 4) are not correct, strap between pins 30 and 87 in the connector of the relay holder for the electrically heated rear window. If the electrically heated rear window works, fit a new relay. If it does not work, check the wiring between pin 87 in the relay's connector and the electrically heated rear window for any open circuits/short circuits.
  6. Check the electric coil in the rear window.
Fig 1: Checking Electrically Heated Rear Window
G00169346Courtesy of SAAB-SCANIA OF AMERICA, INC.
RENDER: 1.0x

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