Nissan Maxima. Manual — part 1125
STC-6
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
DTC/CIRCUIT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000009466552
EPS system functions by ignition power supply.
Diagnosis Procedure
INFOID:0000000009466553
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect power steering control unit connector.
3. Turn the ignition switch ON.
4. Check voltage between power steering control unit connector
M59 terminal 3 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connectors.
2.
CHECK GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between power steering control unit connector
M59 terminal 6 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connectors.
3.
CHECK TERMINALS AND HARNESS CONNECTORS
Check power steering control unit 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
Ground
Condition
Voltage (Approx.)
Connector
Terminal
M59
3
—
Ignition switch ON
Battery voltage
Ignition switch OFF
0V
AWGIA0092ZZ
Power steering control unit
Ground
Continuity
Connector
Terminal
M59
6 —
Yes
AWGIA0034ZZ
POWER STEERING SOLENOID VALVE
STC-7
< DTC/CIRCUIT DIAGNOSIS >
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POWER STEERING SOLENOID VALVE
Description
INFOID:0000000009466554
Power steering solenoid valve controls the power steering oil pressure in the gear housing assembly.
Diagnosis Procedure
INFOID:0000000009466555
Regarding Wiring Diagram information, refer to
.
1.
CHECK POWER STEERING SOLENOID VALVE SIGNAL
1. Start engine.
2. Check voltage between power steering control unit connector
M59 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK HARNESS BETWEEN POWER STEERING SOLENOID VALVE AND POWER STEERING CON-
TROL UNIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect power steering solenoid valve connector.
3. Disconnect power steering control unit connector.
4. Check continuity between power steering solenoid valve con-
nector E14 (A) terminals 1, 2 and power steering control unit
connector M59 (B) terminal 1, 5.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connectors.
3.
CHECK HARNESS BETWEEN POWER STEERING SOLENOID VALVE AND POWER STEERING CON-
TROL UNIT FOR SHORT
Power steering control unit
Ground
Condition
Voltage
(Approx.)
Connector
Terminal
M59
1
—
Vehicle speed: 0 km/h (0
MPH)
(Engine is running)
4.4 - 6.6 V
Vehicle speed: 100 km/h
(62 MPH)
2.5 - 3.7 V
AWGIA0108ZZ
Power steering solenoid valve
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
E14 (A)
1
M59 (B)
1
Yes
2
5
AWGIA0036ZZ
STC-8
< DTC/CIRCUIT DIAGNOSIS >
POWER STEERING SOLENOID VALVE
1. Check continuity between power steering solenoid valve con-
nector E14 terminals 1, 2 and ground.
2. Turn ignition switch ON.
3. Check voltage between power steering solenoid valve connector
E14 terminals 1, 2 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connectors.
4.
CHECK POWER STEERING SOLENOID VALVE
Perform power steering solenoid valve component inspection. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace power steering solenoid valve. Refer to
.
5.
CHECK TERMINALS AND HARNESS CONNECTORS
1. Check power steering control unit pin terminals for damage or loose connection with harness connector.
2. Check power steering solenoid valve pin terminals for damage or loose connection with harness connec-
tor.
Is the inspection result normal?
YES
>> Inspection End
NO
>> Repair or replace damaged parts.
Component Inspection
INFOID:0000000009466556
1.
POWER STEERING SOLENOID VALVE RESISTANCE CHECK
1. Turn ignition switch OFF.
2. Disconnect power steering solenoid valve connector.
3. Check resistance between power steering solenoid valve termi-
nals 1 and 2
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace power steering solenoid valve. Refer to
.
2.
POWER STEERING SOLENOID VALVE OPERATION CHECK
Power steering solenoid valve
Ground
Continuity
Connector
Terminal
E14
1
—
No
2
AWGIA0093ZZ
Power steering solenoid valve
Ground
Voltage (Approx.)
Connector
Terminal
E14
1
—
0V
2
AWGIA0094ZZ
Power steering solenoid valve terminals
Resistance (Approx.)
1 - 2
5
Ω
AWGIA0037ZZ
POWER STEERING SOLENOID VALVE
STC-9
< DTC/CIRCUIT DIAGNOSIS >
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Check power steering solenoid valve by listening for its operation
sound while applying battery voltage to power steering solenoid
valve terminal 1 (positive) and battery ground to terminal 2 (nega-
tive).
Is the inspection result normal?
YES
>> Inspection End
NO
>> Replace power steering solenoid valve. Refer to
AWGIA0038ZZ
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