Nissan Rogue (T33) 2021-Present Service Manual: C105d-7b Brake Fluid Level Low

Nissan Rogue (T33) 2021-Present Service Manual / Brakes :: Brake Control System / With Vdc :: Dtc/circuit Diagnosis / C105d-7b Brake Fluid Level Low

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
C105D 7B

Brake fluid level low

(Brake fluid level low) 		1 Diagnosis condition

  • When ignition switch is ON.

  • When the power supply voltage is normal.
Signal (terminal) Brake fluid level switch signal
Threshold When brake fluid level low signal is detected.
Diagnosis delay time 5 seconds or more
2 Diagnosis condition

  • When ignition switch is ON.

  • When the power supply voltage is normal.
Signal (terminal) Brake fluid level switch signal
Threshold When an open circuit is detected in brake fluid level switch circuit.
Diagnosis delay time 5 seconds or more

POSSIBLE CAUSE

NOTE:

Confirm if DTC is PAST or CRNT. If DTC is CRNT, proceed with Diagnosis Procedure. If DTC is PAST, clear DTC. Do not replace the ABS actuator and electric unit (control unit) for a PAST DTC.

PAST DTC CRNT DTC

  • Brake fluid level is low

  • Harness or connector

  • Brake fluid level switch

  • Combination meter

  • Brake fluid level is low

  • Harness or connector

  • Brake fluid level switch

  • Combination meter

  • ABS actuator and electric unit (control unit)

FAIL-SAFE

The following functions are suspended.

  • VDC function

  • TCS function

  • Brake limited slip differential (BLSD) function

  • Brake assist function

  • Brake force distribution function

  • hill start assist function

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always ignition switch OFF (Auto ACC function OFF) before conducting the next test.

>>

GO TO 2.

CHECK DTC DETECTION

CONSULT

  1. Ignition switch OFF (Auto ACC function OFF).

  2. Start the engine.

    NOTE:

    Wait at least 10 seconds after start the engine.

  3. Perform self-diagnosis for “ABS”.

Is DTC “C105D-7B” detected?

YES-1>>

“CRNT” is displayed: Refer to Diagnosis Procedure.

YES-2>>

“PAST” is displayed: Inspection End (Erase the memory of self-diagnosis results.)

NO-1>>

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

NO-2>>

Confirmation after repair: Inspection End

Diagnosis Procedure

CHECK BRAKE FLUID LEVEL

  1. Ignition switch OFF (Auto ACC function OFF).

  2. Check the brake fluid level. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Refill brake fluid. Refer to Bleeding Brake System. GO TO 2.

PERFORM SELF-DIAGNOSIS (1)

CONSULT

  1. Erase self-diagnosis result for “ABS”.

  2. Ignition switch OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).

  3. Start the engine.

    NOTE:

    Wait at least 10 seconds after start the engine.

  4. Perform self-diagnosis for “ABS”.

Is DTC “C105D-7B” detected?

YES>>

GO TO 3.

NO>>

Inspection End

CHECK CONNECTOR

  1. Disconnect 12V battery negative terminal.

  2. Check the brake fluid level switch harness connector for disconnection or looseness.

  3. Check the combination meter harness connector for disconnection or looseness.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair / replace harness or connector. GO TO 4.

PERFORM SELF-DIAGNOSIS (2)

CONSULT

  1. Connect 12V battery negative terminal.

  2. Start the engine.

    NOTE:

    Wait at least 10 seconds after start the engine.

  3. Perform self-diagnosis for “ABS”.

Is DTC “C105D-7B” detected?

YES>>

GO TO 5.

NO>>

Inspection End

CHECK BRAKE FLUID LEVEL SWITCH

Check the brake fluids level switch. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Replace the reservoir tank. Refer to Disassembly and Assembly. GO TO 6.

PERFORM SELF-DIAGNOSIS (3)

CONSULT

  1. Erase self-diagnosis result for “ABS”.

  2. Ignition switch OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).

  3. Start the engine.

    NOTE:

    Wait at least 10 seconds after start the engine.

  4. Perform self-diagnosis for “ABS”.

Is DTC “C105D-7B” detected?

YES>>

GO TO 7.

NO>>

Inspection End

CHECK CONNECTOR AND TERMINAL

  1. Disconnect 12V battery negative terminal.

  2. Disconnect brake fluid level switch harness connector.

  3. Check the brake fluid level switch harness connector for disconnection or looseness.

  4. Check the brake fluid level switch terminals for damage or loose connection with harness connector.

  5. Disconnect combination meter harness connector.

  6. Check the combination meter harness connector for disconnection or looseness.

  7. Check the combination meter terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair / replace harness, connector, or terminal. GO TO 8.

PERFORM SELF-DIAGNOSIS (4)

CONSULT

  1. Connect brake fluid level switch harness connector.

  2. Connect combination meter harness connector.

  3. Connect 12V battery negative terminal.

  4. Erase self-diagnosis result for “ABS”.

  5. Ignition switch OFF (Auto ACC function OFF) → ON → OFF (Auto ACC function OFF).

  6. Start the engine.

    NOTE:

    Wait at least 10 seconds after start the engine.

  7. Perform self-diagnosis for “ABS”.

Is DTC “C105D-7B” detected?

YES>>

GO TO 9.

NO>>

Inspection End

CHECK BRAKE FLUID LEVEL SWITCH CIRCUIT

  1. Disconnect 12V battery negative terminal.

  2. Disconnect brake fluid level switch harness connector.

  3. Disconnect combination meter harness connector.

  4. Check the continuity between brake fluid level switch harness connector and combination meter harness connector.

    Brake fluid level switch Combination meter Continuity
    Connector Terminal Connector Terminal
    E63 1

    M73*1

    M76*2

    M77*3    		 28 Yes

    *1: Japan production models with Type B

    *2: USA production models with Type B

    *3: With Type A meter

  5. Check the continuity between brake fluid level switch harness connector and ground.

    Brake fluid level switch — Continuity
    Connector Terminal
    E63 1 Ground No

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Repair / replace harness or connector. GO TO 10.

CHECK BRAKE FLUID LEVEL SWITCH GROUND CIRCUIT

Check the continuity between brake fluid level switch harness connector and ground.

Brake fluid level switch — Continuity
Connector Terminal
E63 2 Ground Yes

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Repair / replace harness or connector. GO TO 11.

CHECK COMBINATION METER

  1. Connect brake fluid level switch harness connector.

  2. Connect combination meter harness connector.

  3. Connect 12V battery negative terminal.

  4. Check the combination meter.

    • Type A: Refer to On Board Diagnosis Function.

    • Type B: Refer to On Board Diagnosis Function.

Is the inspection result normal?

YES>>

Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation.

NO>>

Repair or replace combination meter.

  • Type A: Refer to Removal and Installation.

  • Type B: Refer to Removal and Installation.

Component Inspection

CHECK BRAKE FLUID LEVEL SWITCH

  1. Disconnect 12V battery negative terminal.

  2. Disconnect brake fluid level switch harness connector.

  3. Check the continuity between terminals of brake fluid level switch.

    Brake fluid level switch Condition Continuity
    Terminal
    1 – 2 When brake fluid level in reservoir tank is within the specified level. No
    When brake fluid level in reservoir tank is less than the specified level. Yes

Is the inspection result normal?

YES>>

Inspection End

NO>>

Replace the master cylinder. Refer to Disassembly and Assembly.

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