Pinpoint Test A: The DC/AC Inverter Does Not Operate Correctly - No Power At The AC Power Point
High-Voltage Converter/Inverter
Pinpoint Tests
Pinpoint Test A: The DC/AC Inverter Does Not Operate Correctly - No Power at the AC Power Point
Refer to Wiring Diagram Set 12 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Charging System for schematic and connector information. Diagrams By Number
Normal Operation
The DC/AC inverter receives 12 volts DC on circuits SBP04 (GN/RD) and CBP35 (YE/GY) and is grounded on circuit GD182 (BK/GY). The incoming DC power is internally converted to 60 cycle 110 volts AC power that is output to the AC power point on circuits HYA01 (OG/GN) (power) and HYA02 (OG/WH) (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
- Circuits
- DC/AC inverter
- AC power point
PINPOINT TEST A: THE DC/AC INVERTER DOES NOT OPERATE CORRECTLY - NO POWER AT THE AC POWER POINT
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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A1 CHECK CIRCUITS SBP04 (GN/RD) AND CBP35 (YE/GY) FOR VOLTAGE
- 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.
- Measure the voltage between DC/AC inverter C2293a-3, circuit CBP35 (YE/GY), harness side and ground
- Are the voltages greater than 10 volts?
Yes
GO to A2.
No
CHECK the Smart Junction Box (SJB) fuses 1 (30A) and 35 (10A). If OK, REPAIR the circuit(s). TEST the system for normal operation.
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A2 CHECK CIRCUIT GD182 (BK/GY) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between DC/AC inverter C2293a-6, circuit GD182 (BK/GY), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to A3.
No
REPAIR the circuit. TEST the system for normal operation.
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A3 CHECK CIRCUITS HYA01 (OG/GN) AND HYA02 (OG/WH) FOR AN OPEN
- Disconnect: AC Power Point C2292.
- Disconnect: DC/AC Inverter C2293b.
- Measure the resistance between DC/AC inverter C2293b-1, circuit HYA01 (OG/GN), harness side and AC power point C2292-1 circuit HYA01 (OG/GN), harness side;
- Measure the resistance between DC/AC inverter C2293b-5, circuit HYA02 (OG/WH), harness side and AC power point C2292-3 circuit HYA02 (OG/WH), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to A4.
No
REPAIR the circuit. TEST the system for normal operation.
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A4 CHECK THE AC POWER POINT FOR AN OPEN
- Measure the resistance between AC power point C2292-1, component side and AC power point C2292-2.
- Measure the resistance between AC power point C2292-3, component side and AC power point C2292-1.
- 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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