Pinpoint Test P: The Hazard Lamps Are Inoperative/Always On
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- P1 CHECK THE RECORDED DTCs FROM THE SJB SELF-TEST
- Check the recorded DTCs from the SJB self-test.
- Is DTC B2071 present?
- Yes : GO to P2.
- No : GO to P4.
- P2 CHECK THE HAZARD FLASHER LAMP SWITCH
- Disconnect: Hazard Flasher Lamp Switch C2039 (Fusion/Milan).
- Disconnect: FCIM C2402 (MKZ).
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self-Test.
- Repeat the SJB self-test.
- Is DTC B2071 still present?
- Yes : GO to P3.
- No : For Fusion or Milan, INSTALL a new hazard flasher lamp switch. REFER to HAZARD FLASHER LAMP SWITCH in this service information. TEST the system for normal operation. For MKZ, INSTALL a new FCIM. REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article TEST the system for normal operation.
- P3 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280b.
- For Fusion or Milan, measure the resistance between the hazard flasher lamp switch C2039-6, circuit CLS32 (BN/YE), harness side and ground.
- For MKZ, measure the resistance between the FCIM C2402-6, circuit CLS32 (BN/YE), harness side and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to P7.
- No : REPAIR circuit CLS32 (BN/YE) for a short to ground. CLEAR the DTCs. REPEAT the self-test.
- P4 CHECK FOR A VOLTAGE SIGNAL TO THE HAZARD FLASHER LAMP SWITCH OR THE FCIM
- Ignition OFF.
- Disconnect: Hazard Flasher Lamp Switch C2039 (Fusion/Milan).
- Disconnect: FCIM C2402 (MKZ).
- For Fusion or Milan, measure the voltage between the hazard flasher lamp switch C2039-6, circuit CLS32 (BN/YE), harness side and ground.
- For MKZ, measure the voltage between the FCIM C2402-6, circuit CLS32 (BN/YE), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes
: For Fusion or Milan, GO to P6.
For MKZ, INSTALL a new FCIM. REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
- No : GO to P5.
- P5 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR AN OPEN
- For Fusion or Milan, measure the resistance between the SJB C2280b-48, circuit CLS32 (BN/YE), harness side and the hazard flasher lamp switch C2039-6, circuit CLS32 (BN/YE), harness side.
- For Fusion or Milan, measure the resistance between the SJB C2280b-48, circuit CLS32 (BN/YE), harness side and the FCIM C2402-6, circuit CLS32 (BN/YE), harness side.
- Is the resistance less than 5 ohms?
- Yes : GO to P7.
- No : REPAIR circuit CLS32 (BN/YE) for an open. TEST the system for normal operation.
- P6 CHECK FOR VOLTAGE TO THE HAZARD FLASHER LAMP SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the hazard flasher lamp switch C2039-6, circuit CLS32 (BN/YE), harness side and the hazard lamp switch C2039-2, circuit GD116 (BK/VT), harness side.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new hazard flasher lamp switch. REFER to HAZARD FLASHER LAMP SWITCH in this service information. TEST the system for normal operation.
- No : REPAIR circuit GD116 (BK/VT) for an open. TEST the system for normal operation.
- P7 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.