2014 NISSAN TEANA warning

STC-10
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (POWER STEERING CONTROL MODULE)
DIAGNOSIS SYSTEM (POWER STEERING CONTROL MODULE)
CONSULT FunctionINFOID:0000000009460347
CAUTION:
After disconnecting the CONSULT vehicle interface (VI) from the data link connector, the ignition must
be cycled OFF → ON (for at least 5 seconds) → OFF. If this step is not performed, the BCM may not go
to ”sleep mode”, potentially causing a di scharged battery and a no-start condition.
FUNCTION
CONSULT can display each diagnostic item using the diagnostic test modes shown as per the following.
ECU IDENTIFICATION
Displays the part number stored in the control unit.
SELF-DIAG RESULTS MODE
Refer to STC-13, "DTC Index".
When “CRNT” is displayed on self-diagnosis result.
• The system is presently malfunctioning.
When “PAST” is displayed on self-diagnosis result.• System malfunction in the past is detect ed, but the system is presently normal.
DATA MONITOR MODE
Diagnostic test mode Function
ECU identification The part number stored in the control unit can be read.
Self Diagnostic Results Self-diagnostic results and freeze frame data can be read and erased quickly.
Data monitor Input/Output data in the power steering control module can be read.
Monitor item (Unit) Remarks
BATTERY VOLT (V) Displays the power supply voltage for power steering control module.
STEERING ANGLE (deg) Displays the steering angle based on the steering angle signal transmitted by CAN com-
munications.
STR ANG SPD (deg/s) Displays the steering angle speed based on the steering angle signal transmitted by
CAN communications.
MOTOR CURRENT (A) Displays the cu rrent value consumed by power steering control module.
MTR REV SPD COMM (rpm) Displa ys the power steering motor speed command value.
MTR REV SPD (rpm) Displays the power steering motor speed.
C/U TEMP ( °C or °F) Displays the temperature of the power steering control module.
C/U TEMP A ( °C or °F) Displays the temperature of the power steering control module.
MTR ASSIST (%) Displays the current percentage of the allowable assist ratio power steering motor.
ESTM VHCL SPD (km/h or mph) Displays the vehicle speed calculated by the power steering control module.
WARNING LAMP (On/Off) Hydraulic pump electric power steering system warning lamp control status is displayed.
ENGINE STATUS (STOP/RUN/CRANK) Engine speed is displayed from engine condition signal with CAN communication
VHCL SPD JUDGE (OK/NG) Displays the receiving status of the vehicle speed signal transmitted by CAN communi-
cations.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

POWER STEERING CONTROL MODULESTC-11
< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
POWER STEERING CONTROL MODULE
Reference ValueINFOID:0000000009460348
VALUES ON THE DIAGNOSIS TOOL
*1: The value changes according to load of power steering motor.
*2: This is in close agreement with a motor speed command value. Although a quick steering operation may
cause disagreement, this is not a malfunction.
*3: Usually, 100% is displayed. An excessive steer ing operation gradually lowers the percentage. When left
standing, the percentage returns to 100%.
Monitor item Data monitor
Condition Display value
BATTERY VOLT Engine running Battery voltage (V)
STEERING ANGLE The steering wheel is not steered. Approx. 0.0 deg
The steering wheel is steered. Displays steering angle (deg)
STR ANG SPD The steering wheel is not steered. Approx. 0.0 deg/s
The steering wheel is steered. Displays steering angle speed (deg/s)
MOTOR CURRENT Engine running Steering wheel: Not steering (There is
no steering force) MAX approx. 10 A
*1
Steering wheel: Right or left turnDisplays consumption current of pow-
er steering control module (A)
MTR REV SPD COMM Engine running Steering wheel: Not steering (There is
no steering force) Shows an almost constant value
(rpm)
Steering wheel: Right or left turn The value changes as a steering
speed (rpm)
MTR REV SPD Engine running Steering wheel: Not steering (There is
no steering force) Shows an almost constant value
(rpm)
*2
Steering wheel: Right or left turn The value changes as a steering
speed (rpm)*2
C/U TEMP Engine running Displays temperature of inside of
power steering control module ( °C or
° F)
C/U TEMP A Engine running Displays temperature of inside of
power steering control module ( °C or
° F)
MTR ASSIST Engine running 100%
*3
ESTM VHCL SPDVehicle stopped 0.00 km/h or mph
While driving Approximately equal to the indication
on speedometer*4
(inside of ±10%)
WARNING LAMP Hydraulic pump electric power steering warning lamp: ON On
Hydraulic pump electric power steering warning lamp: OFF Off
ENGINE STATUS Engine not running STOP
Engine running RUN
Engine cranking CRANK
VHCL SPD JUDGE Vehicle speed signal can be received via CAN communication OK
Vehicle speed signal cannot be received via CAN communica-
tion NG
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STC-12
< ECU DIAGNOSIS INFORMATION >
POWER STEERING CONTROL MODULE
*4: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This
is not a malfunction.
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-safeINFOID:0000000009460349
When an error occurs in the hydraulic pump electric pow er steering system, fail-safe brings the system to a
halt (manual steering) or restricted (constant steering assi st level) state. When the system is in a halt state,
fail-safe turns ON the hydraulic pump electric power steer ing warning lamp to warn the driver that the hydrau-
lic pump electric power steering system is in the manual steering state.
Protection FunctionINFOID:0000000009460350
• When the steering wheel is operated repeatedly or turned all the way for a long period during parking or low
speed driving, the function of the hydraulic pump elec tric power steering system becomes limited to prevent
the system from overheating. If the steering wheel is operated further more, the hydraulic pump electric
power steering system stops and the hydraulic pump el ectric power steering system warning lamp may be
turned ON. In this case, the steering wheel operation temporarily becomes hard. This is not a malfunction.
When the engine is turned OFF (ignition switch OFF) and steering operation is stopped for a while, the tem-
perature of the hydraulic pump electric power steeri ng system decreases and the steering operation returns
to normal after restarting the engine.
JSGIA0835ZZ
Te r m i n a l N o .
(Wire Color) Description
Condition Value
+ − Signal name Input/Output
1
(W) Ground Battery power supply Input Always Battery Voltage
2
(B) Ground Ground — Always 0 V
5
(BR) Ground Ignition power supply Input Ignition switch: ON Battery Voltage
Ignition switch: OFF 0 V
7
(P) — CAN-L Input/Output — —
8
(L) — CAN-H Input/Output — —
DTC Fail-safe condition
C1143 Certain steering assist force
C1601 Manual steering state
C1606 Manual steering state
C1607 Certain steering assist force
C1608 Manual steering state
U1000 Normal control
NOTE:
If the cause is in a different ECU, the state changes to fixed steering assist force.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

POWER STEERING CONTROL MODULESTC-13
< ECU DIAGNOSIS INFORMATION >
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• Then, the hydraulic pump electric power steering syste m warning lamp turns OFF. If the system is OFF
under the protection state, the hydraulic pump electr ic power steering system warning lamp turns ON to
warn that the system is in the manual steering state. (This is not a system malfunction.) In addition, the fol-
lowing DTC remains to distinguish from malfunction.
DTC Inspection Priority ChartINFOID:0000000009460351
When multiple DTCs are detected simultaneously, c heck one by one depending on the following priority list.
DTC IndexINFOID:0000000009460352
NOTE:
If two or more DTCs are detected, refer to STC-13, "DTC Inspection Priority Chart"
.
DTC vehicle condition
C160A The system temporarily enters the manual steering state. (This is not a hydraulic pump electric
power steering system malfunction.)
Priority Priority order item (DTC)
1 • C1601 BATTERY VOLT
• C1602 NO TUNING SET
• C1606 EPS MOTOR
• C1608 CONTROL UNIT
2 • C1607 EEPROM
3 • C160A HEAT PROTECTION
4 • C1143 ST ANG SEN CIRCUIT
• U1000 CAN COMM CIRCUIT
DTC Items (CONSULT screen terms) Reference
C1143 ST ANG SEN CIRCUIT STC-22, "DTC Logic"
C1601 BATTERY VOLT STC-23, "DTC Logic"
C1602 NO TUNING SETSTC-26, "DTC Logic"
C1606 EPS MOTORSTC-27, "DTC Logic"
C1607 EEPROMSTC-28, "DTC Logic"
C1608 CONTROL UNITSTC-28, "DTC Logic"
C160A HEAT PROTECTION STC-29, "DTC Logic"
U1000 CAN COMM CIRCUITSTC-30, "DTC Logic"
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STC-20
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
YES >> GO TO 6.
NO >> Check harness and connectors based on the information obtained by interview.
6.REPAIR OR REPLACE THE MALFUNCTIONING COMPONENTS.
• Repair or replace the malfunctioning components.
• Reconnect part or connector after repairing or replacing.
• When DTC is detected, erase self-diagnostic results for “EPS”.
>> GO TO 8.
7.IDENTIFY THE MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Estimate the malfunctioning system based on symptom diagnosis and perform inspection.
Can the malfunctioning system be identified?
YES >> GO TO 8.
NO >> Check harness and connectors based on the information obtained by interview.
8.FINAL CHECK
With CONSULT
1. Check the reference value for power steering control module.
2. Recheck the symptom and check that sympto m is not reproduced on the same conditions.
Is the symptom reproduced?
YES >> GO TO 3.
NO >> Inspection End.
Diagnostic Work SheetINFOID:0000000009460355
Description
• In general, customers have their own criteria for a pr oblem. Therefore, it is important to understand the
symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all
the information for the diagnosis, prepare the interview sheet referring to the interview points.
• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.
Interview sheet sample
Interview sheet
Customer
name MR/MSRegistration
number Initial year
registration
Vehicle type VIN
Storage date Engine Mileage km (Mile)
Symptom †
The steering wheel position (center) is in the wrong position.
† Warning lamp turns on.
† Noise †Vibration
† Others
( )
First occurrence †Recently †Others ( )
Frequency of occurrence †Always †Under a certain conditions of †Sometimes (time(s)/day)
Climate con-
ditions †
Irrelevant
Weather †Fine †Cloud †Rain †Snow †Others ( )
Temperature †Hot †Warm †Cool †Cold †Temperature [Approx. °C ( °F)]
Relative humidity †High †Moderate †Low
Road conditions †
Urban area †Suburb area †High way
† Mountain road (uphill or down hill) †Rough road
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

C160A HEAT PROTECTIONSTC-29
< DTC/CIRCUIT DIAGNOSIS >
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C160A HEAT PROTECTION
DTC LogicINFOID:0000000009460366
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.DTC REPRODUCTION PROCEDURE
With CONSULT
1. Turn the ignition switch OFF to ON.
2. Perform “EPS” self-diagnosis.
Is DTC
“C160A” detected?
YES >> Go to STC-19, "Work Flow".
NO >> Inspection End.
DTC Display item Malfunction detected condition Possible cause
C160A HEAT PROTECTION When the steering wheel is operated excessively
and the interior temperature of the power steering
system reaches 118 °C (244.4 °F) or more. (Protec-
tion function)
NOTE:
Although the hydraulic pump electric power steering
system warning lamp turns ON, this is not a system
malfunction. The state returns to normal after stop-
ping steering operation and waiting until the system
interior temperature drops to 90 °C (194 °F) or less. The protection of the hydraulic
pump electric power steering sys-
tem
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
STC-31
< DTC/CIRCUIT DIAGNOSIS >
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HYDRAULIC PUMP ELECTRIC PO WER STEERING WARNING LAMP
Component Function CheckINFOID:0000000009460370
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 warn ing lamp turns OFF after the engine is started.
Is the inspection result normal?
YES >> Inspection End.
NO >> Perform trouble diagnosis. Refer to STC-31, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009460371
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 STC-13, "DTC Index".
NO >> GO TO 2.
2.CHECK HYDRAULIC PUMP ELECTRIC PO WER 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:
The 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 combinat ion meter power supply circuit. Refer to MWI-58,
"COMBINATION METER : Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK TERMINALS AND HARNESS CONNECTORS
Check the power steering control module pin terminal s for damage or loose connection with harness connec-
tor.
Is the inspection result normal?
YES >> Power steering control module is malfuncti oning. Replace power steering oil pump assembly.
Refer to ST-38, "Removal and Installation"
.
NO >> Repair or replace the malfunctioning component.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STC-32
< 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
DescriptionINFOID:0000000009460372
The hydraulic pump electric power steering warning lamp does not illuminate when the ignition switch is
turned ON (lamp check).
Diagnosis ProcedureINFOID:0000000009460373
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 STC-
31, "Diagnosis Procedure".
Is the inspection result normal?
YES >> Check that the pin terminals and t he connection of each connector are normal.
NO >> Repair or replace the malfunctioning components.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM