Pinpoint Test N: DTC P2533 - Ignition Switch Run/Start Position Circuit
High-Voltage Traction Battery
Pinpoint Tests
Pinpoint Test N: DTC P2533 - Ignition Switch Run/Start Position Circuit
Refer to Wiring Diagram Set 12 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Charging System for schematic and connector information. Diagrams By Number
Normal Operation
At all times, the Battery Control Module (BCM) monitors the ignition run/start input circuit for voltage.
- DTC P2533 Ignition Switch Run/Start Position Circuit - If the BCM does not detect voltage on the ignition run/start input circuit with the ignition switch in the ON position and the engine ON or OFF will cause this DTC to be set.
This pinpoint test is intended to diagnose the following:
- Fuse
- Circuitry
- High Voltage Traction Battery (HVTB)
PINPOINT TEST N: DTC P2533 - IGNITION SWITCH RUN/START POSITION CIRCUIT
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N1 RETRIEVE THE DTCs
WARNING: Wear high-voltage insulated safety gloves and a face shield when working with high-voltage batteries or cables. The high-voltage insulated safety gloves should be of the appropriate safety and protection rating. Inspect the gloves before use and always wear them with the leather outer glove. Any hole in the rubber insulating glove is a potential entry point for high-voltage. Failure to follow these instructions may result in serious personal injury or death.
WARNING: Turn OFF the ignition switch for a minimum of 5 minutes before removing high-voltage cables. High-voltage cables and wiring are orange in color. The nominal high-voltage traction battery voltage (HVTB) is 330 V DC. Failure to follow these instructions may result in serious personal injury or death.
WARNING: Depower the high-voltage traction battery (HVTB) before carrying out any removal or installation procedures affecting the high-voltage battery system. Failure to follow this instruction may result in serious personal injury or death.
WARNING: When servicing the high-voltage system, establish a buffer zone per the specified procedure. Failure to follow this instruction may result in serious personal injury or death.
- Enter the following diagnostic mode on the scan tool: BCM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs.
- Check the recorded BCM DTCs from the continuous and on-demand self tests.
- Is DTC P2612 also present?
Yes
REFER to Heating and Air Conditioning.
No
GO to N2.
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N2 CHECK THE BCM IGNITION CIRCUIT INPUT AND BATTERY ZONE VALVE CONTROL CIRCUIT
- Ignition OFF.
- Disconnect: HVTB C4227a.
- Ignition ON.
- Measure the voltage between HVTB C4227a-19, circuit CBB23 (BN/YE), harness side and ground.
- Measure the voltage between HVTB C4227a-33, circuit CYB14 (GY/OG), harness side and ground.
- Are the voltage 10 volts or greater?
Yes
GO to N3.
No
If circuit CBB23 (BN/YE) or both circuits CBB23 (BN/YE) and CYB14 (GY/OG) have less than 10 volts, VERIFY that the Smart Junction Box (SJB) fuse 27 (20A) is OK; if OK, REPAIR the circuit as necessary. CLEAR the DTCs. REPEAT the self-test. If only circuit CYB14 (GY/OG), CHECK the battery zone valve control. REFER to Diagnosis and Testing in Heating and Air Conditioning. Testing and Inspection
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N3 CHECK FOR CORRECT BCM OPERATION
NOTE: This pinpoint test step only addresses the 6-pin and 40-pin connectors for the BCM. It is not necessary to disconnect the high-voltage connectors when following this pinpoint test step procedure.
- Disconnect BCM electrical connector C4227a.
- Check for:
- corrosion.
- pushed-out pins.
- Connect BCM electrical connector C4227a and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new HVTB. REFER to High-Voltage Traction Battery High-Voltage Traction Battery. 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.
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