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Steering Control System: Diagnosis Nissan Sentra B16 рестайлинг

Steering Control Systems 4 illustrations ~1838 words

PRECAUTIONS FOR TROUBLE DIAGNOSIS

  1. Be sure to check the procedures of the trouble diagnosis in advance. Refer to " «HOW TO PERFORM TROUBLE DIAGNOSIS»(ref-367343-S01637888252010072700000) ".
  2. Always erase memory after completing trouble diagnosis.
  3. Checking continuity and voltage between units, be sure to check connector terminals for disconnection, looseness, bend, or collapse. Repair or replace applicable part if any non-standard condition is detected.
  4. Be careful not to forcibly extend any connector terminal if a circuit tester is used for the check.
  5. Always confirm the general precautions. Refer to " «GENERAL PRECAUTION»(ref-367300-S22694913842010072700000) ".

Scheme 9

Scheme 9: INTERVIEW
Scheme 9: INTERVIEW
  1. Complaints vary depending on the person. It is important to clarify the customer's actual remarks.
  2. Ask the customer about what symptoms occur under what conditions. Use the information to reproduce the symptom of confirm by vehicle.

Scheme 10

Scheme 10: Component Parts Location
Scheme 10: Component Parts Location

Scheme 11

Scheme 11: Wiring Diagram - EPS
Scheme 11: Wiring Diagram - EPS

Scheme 12

Scheme 12
Scheme 12

Symptom Chart

If EPS warning lamp turns ON, perform self-diagnosis. Refer to " CONSULT-III FUNCTION (EPS) ".

SymptomConditionCheck itemReference figure
EPS warning lamp does not turn ON when ignition switch to "ON". (EPS warning lamp check)Ignition switch: ONCAN communication lineEPS WARNING LAMP DOES NOT TURN ON
Combination meter
EPS warning lamp does not turn OFF for several seconds after starting the engineEngine runningCAN communication lineEPS WARNING LAMP DOES NOT TURN OFF
Power supply and ground for EPS control unit
Torque sensor
EPS motor
Vehicle speed signal
Engine status signal
Combination meter
Steering wheel turning force is heavy or light, while drivingWhile driving Steering wheel turningCAN communication lineSTEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
Vehicle speed signal
Engine status signal
EPS motor
Steering wheel turning force (Mechanical malfunction)
Unbalance steering wheel turning force and return between right and left, while drivingWhile driving Steering wheel turningWheel alignmentUNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BETWEEN RIGHT AND LEFT
Steering wheel turning force (Mechanical malfunction)
Unbalance steering wheel turning force, while driving (Torque variation)While driving Steering wheel turningSteering column intermediate shaft installation conditionUNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
Steering wheel turning force (Mechanical malfunction)

SYMPTOM CHART

DTC INDEX

DTCDescription
DTC C1601BATTERY VOLT
DTC C1604TORQUE SENSOR
DTC C1605ANGLE SENSOR
DTC C1606EPS MOTOR
DTC C1608CONTROL UNIT
DTC U1000CAN COMM CIRCUIT
DTC U1200CAN VHCL SPEED ABS

DTC INDEX

DIAGNOSTIC PROCEDURE

  1. CHECK TORQUE SENSOR SIGNAL With CONSULT-III Start engine. Select "DATA MONITOR" mode for "EPS" with CONSULT-III. Check the value of "TORQUE SENSOR". Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". Without CONSULT-III Start engine. Check voltage between EPS control unit harness connector M87 terminals 11, 12, 13, 14 and ground. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: INSPECTION END NG: GO TO 2.
  2. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 3. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving the vehicle for a while. OK or NG OK: INSPECTION END NG: Torque sensor is malfunctioning. Replace steering column assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-367338-S16302612782010072700000) ".
  1. PERFORM SELF-DIAGNOSIS With CONSULT-III Turn ignition switch "ON". (Do not start engine.) Select "SELF-DIAG RESULTS" mode for "EPS" with CONSULT-III. Touch "ERASE". Turn ignition switch "OFF", and wait at least 10 seconds. Start engine. Perform the self-diagnosis again. Is the "ANGLE SENSOR [C1605]" displayed? YES: EPS motor rotor position sensor is malfunctioning. Replace steering column assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-367338-S16302612782010072700000) ". NO: INSPECTION END
  1. PERFORM SELF-DIAGNOSIS With CONSULT-III Turn ignition switch "ON". (Do not start engine.) Select "SELF-DIAG RESULTS" mode for "EPS" with CONSULT-III. Touch "ERASE". Turn ignition switch "OFF", and wait at least 10 seconds. Start engine. Perform the self-diagnosis again. Is the "EPS MOTOR [C1606]" displayed? YES: EPS motor is malfunctioning. Replace steering column assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-367338-S16302612782010072700000) ". NO: INSPECTION END
  1. PERFORM SELF-DIAGNOSIS With CONSULT-III Turn ignition switch "ON". (Do not start engine.) Select "SELF-DIAG RESULTS" mode for "EPS" with CONSULT-III. Touch "ERASE". Turn ignition switch "OFF", and wait at least 10 seconds. Start engine. Perform the self-diagnosis again. Is the "CONTROL UNIT [C1608]" displayed? YES: Replace steering column assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-367338-S16302612782010072700000) ". NO: INSPECTION END
  1. CHECK CAN COMMUNICATION CIRCUIT With CONSULT-III Turn ignition switch "ON" and start engine. Select "SELF-DIAG RESULTS" mode for "EPS" with CONSULT-III. Perform the self-diagnosis. Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Print out CONSULT-III screen and go to " «CAN DIAGNOSIS WITH CONSULT-III»(ref-367305-S23768658542010072700000) ". NO: INSPECTION END
  1. CHECK DTC WITH ABS Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to " «CONSULT-III FUNCTION (ABS)»(ref-367331-S29935088882010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2.
  2. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 3. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. CHECK DTC Perform the self-diagnosis, after driving the vehicle for a while. OK or NG OK: INSPECTION END NG: Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to " «CONSULT-III FUNCTION (ABS)»(ref-367331-S29935088882010072700000) ".

SYMPTOM

EPS warning lamp does not turn ON when ignition switch to "ON" .

  1. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to " «CONSULT-III FUNCTION (EPS)»(ref-367343-S32305239962010072700000) ". Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to " «DTC U1000 CAN COMM CIRCUIT»(ref-367343-S31468085222010072700000) ". NO: GO TO 2.
  2. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 3. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  3. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Replace combination meter. Refer to " «REMOVAL AND INSTALLATION»(ref-367330-S03827243432010072700000) ".

EPS warning lamp does not turn OFF for several seconds after starting the engine.

  1. CHECK SELF-DIAGNOSTIC RESULTS Perform self-diagnosis. Refer to " «CONSULT-III FUNCTION (EPS)»(ref-367343-S32305239962010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 2.
  2. CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT Turn ignition switch "OFF". Disconnect EPS control unit harness connector. Turn ignition switch "ON". (Do not start engine.) Check voltage between EPS control unit harness connector (A) terminals and ground. VOLTAGE SPECIFICATION Connector Terminal Voltage M37 3 - Ground Battery voltage E202 1 - Ground Battery voltage Turn ignition switch "OFF". Check voltage between EPS control unit harness connector (A) terminals and ground. VOLTAGE SPECIFICATION Connector Terminal Voltage M37 3 - Ground Approx. 0 V E202 1 - Ground Battery voltage Connect EPS control unit harness connector. OK or NG OK: GO TO 3. NG: Check the following. If any items are damaged, repair or replace damaged parts. 60 A fusible link (letter f, located in the fuse and fusible link box). Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-367304-S39439066852010072700000) . 10 A fuse [No. 12, located in the fuse block (J/B). Refer to «POWER SUPPLY ROUTING CIRCUIT»(ref-367304-S39439066852010072700000) . Harness for short or open between battery and EPS control unit harness connector E202 terminal 1. Harness for short or open between ignition switch and EPS control unit harness connector M37 terminal 3.
  3. CHECK EPS CONTROL UNIT GROUND CIRCUIT Turn ignition switch "OFF". Disconnect EPS control unit harness connector. Check continuity between EPS control unit harness connector (A) terminal and ground. CONTINUITY CHART Connector Terminal Continuity E202 2 YES Also check harness for short to power. Connect EPS control unit harness connector. OK or NG OK: GO TO 4. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  4. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 5. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  5. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Replace combination meter. Refer to " «REMOVAL AND INSTALLATION»(ref-367330-S03827243432010072700000) ".

Steering wheel turning force is heavy or light, while driving.

  1. CHECK SYSTEM FOR CAN COMMUNICATION LINE Perform self-diagnosis. Refer to " «CONSULT-III FUNCTION (EPS)»(ref-367343-S32305239962010072700000) ". Is the "CAN COMM CIRCUIT [U1000]" displayed? YES: Perform trouble diagnosis for CAN communication line. Refer to " «DTC U1000 CAN COMM CIRCUIT»(ref-367343-S31468085222010072700000) ". NO-1: With ABS: GO TO 2. NO-2: Without ABS: GO TO 3 .
  2. CHECK VEHICLE SPEED SIGNAL FROM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to " «CONSULT-III FUNCTION (ABS)»(ref-367331-S29935088882010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 4 .
  3. CHECK VEHICLE SPEED SIGNAL FROM TRANSMISSION CONTROL MODULE (TCM) Perform self-diagnosis with TCM. Refer to " «CONSULT-III FUNCTION (TRANSMISSION)»(ref-367317-S00334948382010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 4.
  4. CHECK COMBINATION METER SIGNAL Perform self-diagnosis with combination meter. Refer to " «CONSULT-III FUNCTION (METER/M&A)»(ref-367330-S27449383382010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 5.
  5. CHECK ENGINE STATUS SIGNAL Perform self-diagnosis for ECM. Refer to " «CONSULT-III FUNCTION (ENGINE)»(ref-367313-S01740296972010072700000) ". Is any malfunction detected by self-diagnosis? YES: Check the malfunctioning system. NO: GO TO 6.
  6. CHECK EPS MOTOR SYSTEM Perform trouble diagnosis for EPS motor. Refer to " «DTC C1606 EPS MOTOR»(ref-367343-S25712107982010072700000) ". OK or NG OK: GO TO 7. NG: Repair or replace damaged parts.
  7. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 8. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  8. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Check the steering wheel turning force because there may be mechanical malfunction. Refer to " «ON-VEHICLE INSPECTION AND SERVICE»(ref-367338-S13385834472010072700000) ".

Unbalance steering wheel turning force and return between right and left, while driving.

  1. CHECK EPS WARNING LAMP Confirm EPS warning lamp during engine running. Does EPS warning lamp turn OFF? YES: GO TO 2. NO: Go to " «EPS WARNING LAMP DOES NOT TURN OFF»(ref-367343-S14441266762010072700000) ".
  2. CHECK WHEEL ALIGNMENT Check wheel alignment. Refer to " «WHEEL ALIGNMENT INSPECTION»(ref-367320-S23238851582010072700000) ". OK or NG OK: GO TO 3. NG: Adjust wheel alignment. Refer to " «WHEEL ALIGNMENT INSPECTION»(ref-367320-S23238851582010072700000) ".
  3. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 4. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  4. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Check the steering wheel turning force because there may be mechanical malfunction. Refer to " «ON-VEHICLE INSPECTION AND SERVICE»(ref-367338-S13385834472010072700000) ".

Unbalance steering wheel turning force, while driving (Torque variation).

  1. CHECK EPS WARNING LAMP Confirm EPS warning lamp during engine running. Does EPS warning lamp turn OFF? YES: GO TO 2. NO: Go to " «EPS WARNING LAMP DOES NOT TURN OFF»(ref-367343-S14441266762010072700000) ".
  2. CHECK STEERING COLUMN INTERMEDIATE SHAFT Check the connection between intermediate shaft and the mounting part of steering column assembly and steering gear assembly. Refer to " «REMOVAL AND INSTALLATION»(ref-367338-S19951790672010072700000) ". OK or NG OK: GO TO 3. NG: Repair or replace damaged parts.
  3. CHECK EPS CONTROL UNIT Check EPS control unit input/output signal. Refer to " «EPS CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUE»(ref-367343-S23438661542010072700000) ". OK or NG OK: GO TO 4. NG: Check EPS control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
  4. SYMPTOM CHECK Check again. OK or NG OK: INSPECTION END NG: Check the steering wheel turning force because there may be mechanical malfunction. Refer to " «ON-VEHICLE INSPECTION AND SERVICE»(ref-367338-S13385834472010072700000) ".

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