Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1999SABLE V6-3.0L DOHC VIN SREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWMANUAL A/C-HEATER
1999 Mercury Sable V6-3.0L DOHC VIN S
Manual A/C-Heater
1999 Mercury Sable V6-3.0L DOHC VIN SSECTION Manual A/C-Heater
1. Verify the customer's concern by operating the manual A/C-heater controls to duplicate the condition.
2. Inspect to determine if one of the mechanical or electrical concerns apply:
VISUAL INSPECTION CHART
Mechanical
- Vacuum hose damaged.
- AC system damaged.
- Damaged drive belt.
Electrical
- Open fuse(s).
- circuitry misrouted/damaged.
- Connectors damaged/disconnected.
3. If inspection reveals an obvious concern that can be readily serviced, correct the concern before continuing with Inspection and Verification.
4. If a concern remains after the inspection, use the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent connected to the Data Link Connector (DLC) and select the vehicle to be tested from the NGS menu.
If the vehicle selection cannot be entered:
- check that the program card is properly installed.
- check the connections to the vehicle.
- check the ignition switch position.
If the NGS still does not allow the vehicle selection to be entered, refer to the New Generation Star Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST using the NGS or equivalent. If the NGS responds with:
- CKT914 and CKT915 = ALL MODULE NO RESP/NOT EQUIP, go to Module Communication Network to diagnose a network concern.
- If the Powertrain Control Module (PCM) is not listed for a communication concern, turn the A/C function selector switch to OFF and execute self-test diagnostics for the PCM.
6. If any PCM DTCs retrieved, and are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code Index to continue diagnostics. Trouble Code Index
7. If no DTCs related to the concern are retrieved, go to the Symptom Chart to continue diagnostics. Manual Climate Control
2. Inspect to determine if one of the mechanical or electrical concerns apply:
VISUAL INSPECTION CHART
Mechanical
- Vacuum hose damaged.
- AC system damaged.
- Damaged drive belt.
Electrical
- Open fuse(s).
- circuitry misrouted/damaged.
- Connectors damaged/disconnected.
3. If inspection reveals an obvious concern that can be readily serviced, correct the concern before continuing with Inspection and Verification.
4. If a concern remains after the inspection, use the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent connected to the Data Link Connector (DLC) and select the vehicle to be tested from the NGS menu.
If the vehicle selection cannot be entered:
- check that the program card is properly installed.
- check the connections to the vehicle.
- check the ignition switch position.
If the NGS still does not allow the vehicle selection to be entered, refer to the New Generation Star Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST using the NGS or equivalent. If the NGS responds with:
- CKT914 and CKT915 = ALL MODULE NO RESP/NOT EQUIP, go to Module Communication Network to diagnose a network concern.
- If the Powertrain Control Module (PCM) is not listed for a communication concern, turn the A/C function selector switch to OFF and execute self-test diagnostics for the PCM.
6. If any PCM DTCs retrieved, and are related to the concern, go to the Powertrain Control Module (PCM) Diagnostic Trouble Code Index to continue diagnostics. Trouble Code Index
7. If no DTCs related to the concern are retrieved, go to the Symptom Chart to continue diagnostics. Manual Climate Control
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.