FAULT DIAGNOSIS
- Ensure SDA Mk II is connected to Saab ISAT Scan Tester. Connect ISAT Scan Tester to data link connector (under left side of dash, next to steering column).
- During diagnosis, ignition switch should be in normal driving position. Obtain readouts and make a note of stored Diagnostic Trouble Codes (DTCs) in all systems before disconnecting battery and any control module.
- If communication cannot be established between ISAT and the A/C-heater control panel (control module), check that ALL fuses are not blown and that they are supplied with current. Check wiring harness between A/C-heater control panel and data link connector. Also check power and ground circuits to data link connector. Ensure data link connector pins are not damaged.
- Ensure ignition switch is off before disconnecting components, control module, or connectors. DO NOT remove the control module's signal ground without first disconnecting the battery, as this could damage the control module.
- Check power and ground circuits to control module. Ensure component connector pins are not damaged. Never switch from volts to ohms, or vice versa, on multimeter without first having unplugged tester leads.
- Reattach connectors. Start and drive vehicle to check whether the fault or faults persists. Voltage values are proportional to battery voltage, and should be used only as a guide.
- All control modules are sensitive to electrostatic discharge and could, if handled incorrectly, be damaged. Avoid disconnecting or removing the control module unless absolutely necessary. After checking functions, always clear fault memory with CLEAR FAULT CODES command.
RETRIEVING TROUBLE CODES
- Connect ISAT Scan Tester to data link connector (under left side of dash, next to steering column). Clear any manual programming from A/C-heater control panel (control module) and then road test vehicle.
- Obtain Diagnostic Trouble Codes (DTCs) and write them down on a piece of paper. Perform A/C-heater control panel calibration. See «CALIBRATION»(ref-13734-S03311839732000122600000) under FAULT DIAGNOSIS.
- Obtain DTCs once again and make a note of any additional DTCs. See «DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION»(ref-13734-S17286721482000122600000) . See «TESTING»(ref-13734-S29682528762000122600000) . This procedure should be followed, since DTCs B2403 and B2493 can only be detected in connection with calibration.
- Diagnose and test A/C-heater system using relevant trouble codes. After servicing vehicle, perform A/C-heater control panel calibration. See «CALIBRATION»(ref-13734-S03311839732000122600000) under FAULT DIAGNOSIS.
| DTC (1) | Component/Circuit (Fault) |
|---|
| B1343 | Solar Sensor (Open/Shorted Circuit) |
| B1347 | Blend Air Sensor (Shorted To Ground) |
| B1348 | Blend Air Sensor (Open/Shorted Circuit) |
| B1352 | In-Vehicle Temp. Sensor (Shorted To Ground) |
| B1353 | In-Vehicle Temp. Sensor (Open/Shorted Circuit) |
| B1355 | In-Vehicle Temp. Sensor & Vent Motor Power Supply (Shorted To Ground) |
| B1360 | A/C-Heater Control Panel Push Buttons |
| B1493 | A/C Output Signal (Shorted To Ground) |
| B1498 | Heated Rear Window (Shorted To Ground) |
| B1515 | Sensor Ground (Shorted To Battery Voltage) |
| B1605 | Control Module (Internal Fault) |
| B1675 | Air Distribution Motor Faulty |
| B1676 | Recirculation Motor Faulty |
| B1677 | Heater Flap Motor Faulty |
| B2402 | Air Dist. Stepper Motor (Shorted To Ground) |
| B2403 | Air Dist. Stepper Motor (Open Circuit) |
| B2404 | Air Dist. Stepper Motor (Shorted Circuit) |
| B2405 | Air Dist. Damper Loose |
| B2406 | Air Dist. Damper Jammed |
| B2413 | Recirculation Motor (Open Circuit) |
| B2414 | Recirculation Motor (Shorted Circuit) |
| B2422 | Fan Test Voltage (Shorted To Ground) |
| B2423 | Fan Test Voltage (Shorted To Battery Voltage) |
| B2426 | Fan Control Voltage (Overloaded Circuit) |
| B2427 | Fan Control Voltage (Shorted To Ground) |
| B2428 | Fan Control Voltage (Shorted To Battery Voltage) |
| B2492 | Blend Air Stepper Motor (Shorted To Ground) |
| B2493 | Blend Air Stepper Motor (Open Circuit) |
| B2494 | Blend Air Stepper Motor (Shorted Circuit) |
| B2495 | Blend Air Damper Loose |
| B2496 | Blend Air Damper Jammed |
| (1) Codes can only be retrieved with Saab ISAT Scan Tester. |
| (1) | Codes can only be retrieved with Saab ISAT Scan Tester. |
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
CLEARING TROUBLE CODES
After checking functions, always clear fault memory with CLEAR FAULT CODES command on Saab ISAT Scan Tester. ALL systems can be cleared with the CLEAR ALL command.
TESTING
| WARNING | To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section. |
