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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 4) >> DTC/Circuit Diagnosis >> P1550 Battery Current Sensor >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms(Trouble diagnosis content) DTC detection condition
P1550 00 BAT CURRENT SENSOR(BAT CURRENT SENSOR) Diagnosis condition Engine running at idle
Signal (terminal) Battery current sensor signal and sensor power supply 1 signal.
Threshold The output voltage of the battery current sensor remains within the specified range while engine is running.
Diagnosis delay time -

POSSIBLE CAUSE 

FAIL-SAFE 

Not applicable

DTC CONFIRMATION PROCEDURE 

  1. PRECONDITIONING 

    If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be turned OFF and wait for 10 seconds or more to start this procedure. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

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    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Start the engine and let it idle at least 10 seconds.
    2. Check 1st trip DTC.

    Is 1st trip DTC detected?

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    Proceed to Diagnosis Procedure .

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    To check malfunction symptom before repair: Refer to Intermittent Incident .

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    Confirmation after repair: INSPECTION END