Nissan Murano Z51. Instruction — part 1405
VEHICLE SPEED SIGNAL CIRCUIT
STC-11
< DTC/CIRCUIT DIAGNOSIS >
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VEHICLE SPEED SIGNAL CIRCUIT
Description
INFOID:0000000005515251
Combination meter sends vehicle speed signal to power steering control unit.
Diagnosis Procedure
INFOID:0000000005515252
1.
PERFORM COMBINATION METER SELF-DIAGNOSIS
With CONSULT-III
1.
Turn the ignition switch ON.
CAUTION:
Never start the engine
2.
Perform “METER/M&A” self-diagnosis. Refer to
MWI-34, "CONSULT-III Function (METER/M&A)"
.
Is any DTC detected?
YES
>> Check the DTC.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT
1.
Turn the ignition switch OFF.
2.
Disconnect combination meter harness connector.
3.
Disconnect power steering control unit harness connector.
4.
Check continuity between combination meter harness connector and power steering control unit harness
connector.
5.
Check continuity between power steering control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK VEHICLE SPEED SIGNAL (1)
1.
Turn the ignition switch OFF.
2.
Connect combination meter harness connector.
3.
Check combination meter input/output standard values. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace combination meter Refer to
.
4.
CHECK VEHICLE SPEED SIGNAL (2)
1.
Turn the ignition switch OFF.
2.
Connect power steering control unit harness connector.
3.
Check signal between power steering control unit harness connector and ground with oscilloscope.
Combination meter
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
M34
30
M61
8
Existed
Power steering control unit
—
Continuity
Connector
Terminal
M61
8
Ground
Not existed
STC-12
< DTC/CIRCUIT DIAGNOSIS >
VEHICLE SPEED SIGNAL CIRCUIT
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace power steering control unit. Refer to
STC-21, "Removal and Installation"
5.
CHECK TERMINALS AND HARNESS CONNECTORS
• Check power steering control unit pin terminals for damage or loose connection with harness connector.
• Check combination meter pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace damaged parts.
Power steering control unit
—
Condition
Voltage (Approx.)
Connector
Terminal
M61
8
Ground
Vehicle speed: 40 km/h (25 MPH)
CAUTION:
Check air pressure of tire under
standard condition.
JSNIA0015GB
POWER STEERING CONTROL UNIT
STC-13
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
POWER STEERING CONTROL UNIT
Reference Value
INFOID:0000000005515253
TERMINAL LAYOUT
PHYSICAL VALUES
JSGIA0023ZZ
Terminal No.
(Wire color)
Description
Condition
Value (Approx.)
+
-
Signal name
Input/
Output
1
(Y)
Ground
Power steering solenoid
valve voltage
Output
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
4.4 – 6.6 V
Vehicle speed: 100 km/h (62 MPH)
2.4 – 3.6 V
3
(G)
Ground
Ignition switch power
supply
Input
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
5
(LG)
Ground
Power steering solenoid
valve ground
—
Always
0 V
6
(B)
Ground
Ground
—
Always
0 V
8
(P)
Ground
Vehicle speed signal
Input
Vehicle speed: 40 km/h (25 MPH)
CAUTION:
Check air pressure of tire under
standard condition.
10
(V)
Ground
Engine speed signal
Input
Engine is running
• Warm-up condition
• Idle speed
Engine is running
• Warm-up condition
• Engine speed: Approx. 2,000 rpm
JSNIA0015GB
JMBIA0076GB
JMBIA0077GB
STC-14
< ECU DIAGNOSIS INFORMATION >
POWER STEERING CONTROL UNIT
CAUTION:
When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to forcibly extend any connector ter-
minals.
Wiring Diagram - ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM -
INFOID:0000000005515254
JCGWM0180GB
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