Pinpoint Test K: The DC/AC Inverter Does Not Operate Correctly - No Power At The AC Power Point Or The LED Indicator Flashes
High-Voltage Converter/Inverter
Pinpoint Tests
Pinpoint Test K: The DC/AC Inverter Does Not Operate Correctly - No Power at the AC Power Point or the AC Power Point LED Indicator Flashes With the Key in the ON Position
Refer to Wiring Diagram Set 12 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Charging System for schematic and connector information. Diagrams By Number
Normal Operation
The DC/AC inverter receives 12 volts DC at C2293A-1 and C2293A-3 and is grounded at C2293A-6. The incoming DC power is internally converted to 60 Hz, 110 volt AC power that is output to the AC power point from C2293B-1 (power) and C2293B-5 (neutral).
NOTE: The electrical device that is powered by the AC power point must not exceed 150 watts.
NOTE: If the green LED is flashing, the AC power point may be overloaded, overheated or shorted. Unplug the electrical device from the AC power point and cycle the key. Refer to the Owner's Literature to determine if the electrical device is appropriate for the AC power point.
This pinpoint test is intended to diagnose the following:
- Fuses
- Wiring, terminals or connectors
- DC/AC inverter
- AC power point
PINPOINT TEST K: THE DC/AC INVERTER DOES NOT OPERATE CORRECTLY - NO POWER AT THE AC POWER POINT OR THE AC POWER POINT LED INDICATOR FLASHES WITH THE KEY IN THE ON POSITION
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K1 CHECK THE DC/AC INVERTER VOLTAGE CIRCUITS
- Ignition OFF.
- Disconnect: DC/AC Inverter C2293A.
- Ignition ON.
- Measure the voltage between DC/AC inverter C2293A-1, circuit SBP04 (GN/RD), harness side and ground; and between DC/AC inverter C2293A-3, circuit CBP35 (YE/GY), harness side and ground.
- Are the voltages greater than 10 volts?
Yes
GO to K2.
No
VERIFY the Smart Junction Box (SJB) fuses 4 (30A) and 35 (10A) are OK. If OK, REPAIR the affected circuit(s). If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. TEST the system for normal operation.
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K2 CHECK THE DC/AC INVERTER GROUND CIRCUIT
- Ignition OFF.
- Measure the resistance between DC/AC inverter C2293A-6, circuit GD139 (BK/YE), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to K3.
No
REPAIR circuit GD139 (BK/YE). TEST the system for normal operation.
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K3 CHECK THE AC POWER POINT CIRCUITS FOR AN OPEN
- Disconnect: AC Power Point C2292.
- Disconnect: DC/AC Inverter C2293B.
- Measure the resistance between DC/AC inverter C2293B, harness side and AC power point C2292, harness side as follows:
- Are the resistances less than 5 ohms?
Yes
GO to K4.
No
REPAIR the affected circuit(s). TEST the system for normal operation.
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K4 CHECK THE AC POWER POINT CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between AC power point C2292-1, circuit HYA01 (OG/GN), harness side and ground.
- Measure the resistance between AC power point C2292-3, circuit HYA02 (OG/WH), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to K5.
No
REPAIR the affected circuit(s). TEST the system for normal operation.
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K5 CHECK THE AC POWER POINT CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between AC power point C2292-1, circuit HYA01 (OG/GN), harness side and C2292-3, circuit HYA02 (OG/WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to K6.
No
REPAIR the affected circuit(s). TEST the system for normal operation.
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K6 CHECK THE AC POWER POINT FOR A SHORT TOGETHER
- Measure the resistance between AC power point C2292-1, circuit HYA01 (OG/GN), component side and C2292-3, circuit HYA02 (OG/WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to K7.
No
INSTALL a new AC power point. TEST the system for normal operation.
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K7 CHECK THE AC POWER POINT FOR AN OPEN
- Measure the resistance between AC power point outlet side, pin 1 and AC power point C2292, pin-3, component side.
- Measure the resistance between AC power point outlet side, pin 2 and AC power point C2292, pin-1, component side.
- Are the resistances less than 5 ohms?
Yes
INSTALL a new DC/AC inverter. REFER to Direct Current/Alternating Current (DC/AC) Inverter Direct Current/Alternating Current (DC/AC) Inverter. TEST the system for normal operation.
No
INSTALL a new AC power point. REFER to Alternating Current (AC) Powerpoint Alternating Current (AC) Powerpoint. TEST the system for normal operation.
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