Nissan Pathfinder. Manual — part 1128
HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
STC-29
< DTC/CIRCUIT DIAGNOSIS >
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HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
Component Function Check
INFOID:0000000009177150
1.
CHECK THE ILLUMINATION OF THE HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING
LAMP
Check that the hydraulic pump electric power steering warning lamp turns ON when ignition switch turns ON.
Then, hydraulic pump electric power steering warning lamp turns OFF after the engine is started.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Perform trouble diagnosis. Refer to
Diagnosis Procedure
INFOID:0000000009177151
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform “EPS” self-diagnosis.
Is any DTC detected?
YES
>> Check the DTC. Refer to
NO
>> GO TO 2.
2.
CHECK HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP SIGNAL
With CONSULT
1. Turn the ignition switch ON.
2. Select “WARNING LAMP” in “DATA MONITOR” of “EPS”.
3. Check that the item in “DATA MONITOR” is “On”.
CAUTION:
Engine should not be running for step 3.
4. Start the engine.
CAUTION:
Never drive the vehicle during the test.
5. Check that the item in “DATA MONITOR” is “Off”.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for combination meter power supply circuit. Refer to
"COMBINATION METER : Diagnosis Procedure"
.
NO
>> GO TO 3.
3.
CHECK TERMINALS AND HARNESS CONNECTORS
Check the power steering control module pin terminals for damage or loose connection with harness connec-
tor.
Is the inspection result normal?
YES
>> Power steering control module is malfunctioning. Replace power steering oil pump assembly.
ST-52, "Removal and Installation"
NO
>> Repair or replace the malfunctioning component.
STC-30
< SYMPTOM DIAGNOSIS >
HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP DOES
NOT TURN ON
SYMPTOM DIAGNOSIS
HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
DOES NOT TURN ON
Description
INFOID:0000000009177152
The hydraulic pump electric power steering warning lamp does not illuminate when the ignition switch is
turned ON (lamp check).
Diagnosis Procedure
INFOID:0000000009177153
1.
CHECK THE HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
Perform trouble diagnosis for the hydraulic pump electric power steering warning lamp system. Refer to
.
Is the inspection result normal?
YES
>> Check that the pin terminals and the connection of each connector are normal.
NO
>> Repair or replace the malfunctioning components.
HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP DOES
NOT TURN OFF
STC-31
< SYMPTOM DIAGNOSIS >
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HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
DOES NOT TURN OFF
Description
INFOID:0000000009177154
Hydraulic pump electric power steering warning lamp does not turn OFF several seconds after engine started
Diagnosis Procedure
INFOID:0000000009177155
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
Perform “EPS” self-diagnosis.
Is any DTC detected?
YES
>> Check the DTC. Refer to
NO
>> GO TO 2.
2.
CHECK HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
Perform the trouble diagnosis of hydraulic pump electric power steering warning lamp. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the malfunctioning components.
3.
POWER STEERING CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT
Perform the trouble diagnosis of power steering control module power supply and ground. Refer to
.
Is the inspection result normal?
YES
>> Check that the pin terminals and the connection of each connector are normal.
NO
>> Repair or replace the malfunctioning components.
STC-32
< SYMPTOM DIAGNOSIS >
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
Diagnosis Procedure
INFOID:0000000009177156
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
Perform “EPS” self-diagnosis.
Is a malfunctioning system displayed?
YES
>> Check malfunctioning system. Refer to
.
NO
>> GO TO 2.
2.
CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)
With CONSULT
1. Start the engine.
CAUTION:
Never drive the vehicle.
2. Turn the steering wheel until it stops.
3. Select “MTR ASSIST” in “DATA MONITOR” of “EPS”.
Is the display value “100%”?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)
With CONSULT
1. Select “C/U TEMP” and “C/U TEMP A” in “DATA MONITOR” of “EPS”.
2. Stop the system until the DATA MONITOR display value drops to “90
°C (194°F)” or less.
3. Check whether symptom continues.
Did symptom continue?
YES
>> GO TO 4.
NO
>> This occurs because the protection function lowers the assist force. It is not a system malfunction.
Inspection End.
4.
CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)
With CONSULT
1. Turn the steering wheel to the straight-ahead position. (There is no steering force)
2. Select “BATTERY VOLT” in “DATA MONITOR” of “EPS”.
Is the display value “10.5 V” or more?
YES
>> GO TO 5.
NO
>> Check the battery power system. Refer to
.
5.
CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)
With CONSULT
Select “ESTM VHCL SPD” in “DATA MONITOR” of “EPS”.
*: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This
is not a malfunction.
Is the check result normal?
YES
>> GO TO 6.
NO
>> Check the combination meter, ABS actuator and electric unit (control unit). Refer to
"CONSULT Function (METER/M&A)"
.
Monitor item
Test condition
Display value
ESTM VHCL SPD
When stopped
0.00 km/h or mph
While driving
Approximately equal to the in-
dication on speedometer
*
(Inside of
±10%)
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