Nissan Murano: Brake System :: Basic Inspection / Brake Booster
Inspection
VACUUM INSPECTION
Idle the engine for one minute to apply vacuum to the brake booster. Stop the engine. Depress the brake pedal several times at five second intervals until the accumulated vacuum is released to atmospheric pressure. Check that the clearance between brake pedal and dash lower panel gradually increases (A —>B —>C) each time the brake pedal is depressed during this operation.

Depress the brake pedal with the engine running. Then stop the engine while holding down the brake pedal. Check that the brake pedal stroke does not change after holding down the brake pedal for 30 seconds or more.

NOTE:
A slight impact with a small click may be felt on the pedal when the brake pedal is fully depressed. This is normal brake system operation.
OPERATION
Depress the brake pedal several times at five second intervals with the engine stopped. Start the engine with the brake pedal fully depressed. Check that the clearance between brake pedal and dash lower panel decreases.

NOTE:
A slight impact with a small click may be felt on the pedal when the brake pedal is fully depressed. This is normal brake system operation.
Inspection
Check for brake fluid leakage at the following areas:
Master cylinder mounting face
Reservoir tank mounting face
Sub tank mounting face
Brake tube and brake tube connections
Brake hose and brake hose connections
If any brake fluid leakage is found, repair as necessary...
Inspection
Check for uneven wear of the disc brake rotor using a micrometer. Replace the disc brake rotor if the thickness is below the wear limit. Thickness variation (measured at 8 positions)
: Refer to Front Disc Brake...
Other information:
DTC Description
DTC DETECTION LOGIC
Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine.
Engine coolant temperature is insufficient for closed loop fuel control.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0125
ECT SENSOR
(Insufficient coolant temperature for closed loop fuel control)
1
Diagnosis condition
—
Signal (terminal)
Voltage signal transmitted from engine coolant temperature sensor to ECM
Threshold
Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine
Diagnosis delay time
—
2
Diagnosis condition
—
Signal (terminal)
Voltage signal transmitted from engine coolant temperature sensor to ECM
Threshold
Engine coolant temperature is insufficient for closed loop fuel control
Diagnosis delay time
—
POSSIBLE CAUSE
Harness and connectors (High resistance in the circuit)
Engine coolant temperature sensor
Thermostat
FAIL-SAFENot applicable
DTC Confirmation Procedure
CHECK DTC PRIORITY
If DTC P00125 is displayed with DTC P0116, P0117 or P0118, first perform the trouble diagnosis for DTC P0116, P0117 or P0118...
DTC Description
DTC DETECTION LOGIC DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0826
UP/DOWN SHIFT SWITCH
(Up and Down Shift Switch Circuit)
Diagnosis condition
Engine is started
Signal
—
Threshold
TCM monitors manual mode, non-manual mode, up or down switch signal, and detects as irregular when impossible input pattern occurs
Diagnosis delay time
1 second or more
POSSIBLE CAUSE
Manual mode switch
Harness or connectors
(Manual mode switch circuit are open or shorted...