ABS NISSAN ALMERA TINO 2001 Service Workshop Manual

4 CHECK MOTOR RELAY POWER SUPPLY CIRCUIT
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector terminal 17 and ground.
SBR055EF
Does battery voltage exist?
Ye s©GO TO 5.
No©Check the following.
+Harness connector E1
+Harness for open or short between ABS actuator and electric unit and fusible link
If NG, repair harness or connectors.
5 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND CIRCUIT
Refer to ABS ACTUATOR AND ELECTRIC UNIT GROUND in Ground Circuit Check, BR-68.
Is ground circuit OK?
Ye s©Replace ABS actuator and electric unit.
No©Check the following.
+Harness connector E1
+Harness for open or short between ABS actuator and electric unit and ground
If NG, repair harness or connectors.
6 REPLACE FUSIBLE LINK
Replace fusible link.
Does the fusible link blow out when ignition switch is turned“ON”?
Ye s©GO TO 7.
No©INSPECTION END
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Motor Relay or Motor (Cont’d)
BR-78

7 CHECK ABS ACTUATOR MOTOR POWER SUPPLY CIRCUIT
1. Disconnect battery cable and ABS actuator and electric unit connector.
2. Check continuity between ABS actuator and electric unit connector terminal 17 and ground.
NBR373
Does continuity exist?
Ye s©Check ABS actuator and electric unit pin terminals for damage or the connection of ABS
actuator and electric unit harness connector. Reconnect ABS actuator and electric unit
harness connector. Then retest.
No©Check the following.
+Harness connector E1
+Harness for open or short between ABS actuator and electric unit and fusible link
If NG, repair harness or connectors.
Low VoltageNLBR0102DIAGNOSTIC PROCEDURENLBR0102S01(Malfunction code No. 57 for models with self-diagnosis func-
tion)
1 INSPECTION START
ABS actuator and electric unit power supply and ground circuit inspection
SBR625E
©GO TO 2.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Motor Relay or Motor (Cont’d)
BR-79

2 CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit connector. Check terminals for damage or loose connections. Then recon-
nect connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 3.
No©INSPECTION END
3 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector terminal 15 and ground.
SBR058EH
Does battery voltage exist when ignition switch is turned ON?
Ye s©GO TO 4.
No©GO TO 5.
4 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND
Refer to ABS ACTUATOR AND ELECTRIC UNIT GROUND in Ground Circuit Check, BR-68.
Is ground circuit OK?
OK©Check ABS actuator and electric unit pin terminals for damage or the connection of ABS
actuator and electric unit harness connector. Reconnect ABS actuator and electric unit
harness connector. Then retest.
NG©Check the following.
+Harness connector E1
+Harness for open or short between ABS actuator and electric unit and ground
If NG, repair harness or connectors.
5 CHECK FUSE
Check 10A fuse 31 (Engine control) for control unit. Refer to POWER SUPPLY ROUTING in EL section.
Is fuse OK?
Ye s©GO TO 6.
No©Replace fuse.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Low Voltage (Cont’d)
BR-80

6 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT
Check continuity between battery and ABS actuator and electric unit connector terminal 15.
Does continuity exist?
Ye s©Check battery. Refer to BATTERY in EL section.
No©Check the following.
+Harness connector E1
+Harness for open or short between ABS actuator and electric unit and fuse
If NG, repair harness or connectors.
Control UnitNLBR0103DIAGNOSTIC PROCEDURENLBR0103S01(Malfunction code No. 71 for models with self-diagnosis func-
tion)
1 INSPECTION START
ABS actuator and electric unit power supply and ground circuit inspection
SBR626E
©GO TO 2.
2 CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit connector.
Check terminals for damage or loose connections and replace. Then reconnect connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 3.
No©INSPECTION END
3 CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT
Check voltage. Refer to“3. CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT”in“Low Voltage”,
BR-79.
Does battery voltage exist when ignition switch is turned ON?
Ye s©GO TO 4.
No©Repair.
4 CHECK WARNING LAMP INDICATION
Does warning lamp indicate code No. 71 again?
Ye s©Replace ABS actuator and electric unit.
No©Inspect the system according to the code No.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Low Voltage (Cont’d)
BR-81

1. ABS Works FrequentlyNLBR0104
1 CHECK BRAKE FLUID PRESSURE
Check brake fluid pressure distribution.
Is brake fluid pressure distribution normal?
Ye s©GO TO 2.
No©Perform Preliminary Check. Refer to BR-65.
2 CHECK WHEEL SENSOR
1. Check wheel sensor connector for terminal damage or loose connections.
2. Perform wheel sensor mechanical check.
Refer to ªWheel Sensor or Rotorº, BR-71.
Are wheel sensors functioning properly?
Ye s©GO TO 3.
No©Repair.
3 CHECK FRONT AXLE
Check front and rear axles for excessive looseness. Refer to AX section, ªFront Wheel Bearingº, ªON-VEHICLE SERVICEº
and ªRear Wheel Bearingº, ªON-VEHICLE SERVICEº.
Is front axle installed properly?
Ye s©Go to ª3. CHECK WARNING LAMP INDICATIONº in ª2. Unexpected Pedal Actionº,
BR-82.
No©Repair.
2. Unexpected Pedal ActionNLBR0105
1 CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Is stroke excessively large?
SBR540A
Ye s©Perform Preliminary Check. Refer to BR-65.
No©GO TO 2.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
1. ABS Works Frequently
BR-82

2 CHECK CONNECTOR AND PERFORMANCE
1. Disconnect ABS actuator and electric unit connector.
2. Check whether brake is effective.
OK or NG
Ye s©GO TO 3.
No©Perform Preliminary Check. Refer to BR-65.
3 CHECK WARNING LAMP INDICATION
Ensure warning lamp remains off while driving.
SBR759E
Is warning lamp turned off?
Ye s©GO TO 4.
No©Carry out self-diagnosis. Refer to BR-56, BR-58.
4 CHECK WHEEL SENSOR
1. Check wheel sensor connector for terminal damage or loose connection.
2. Perform wheel sensor mechanical check.
Is wheel sensor mechanism OK?
Ye s©Check ABS actuator and electric unit pin terminals for damage or the connection of ABS
actuator and electric unit harness connector. Reconnect ABS actuator and electric unit
harness connector. Then retest.
No©Repair.
3. Long Stopping DistanceNLBR0106
1 CHECK CONNECTOR AND PERFORMANCE
1. Cancel ABS by disconnecting ABS actuator and electric unit connector.
2. Check whether stopping distance is still long.
OK or NG
OK©Perform Preliminary Check and air bleeding.
NG©Go to“3. CHECK WARNING LAMP INDICATION”in“2. Unexpected Pedal Action”,
BR-82.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
2. Unexpected Pedal Action (Cont’d)
BR-83

NOTE:
Stopping distance may be longer than vehicles without ABS when
road condition is slippery.
4. ABS Does Not WorkNLBR0107
1 CHECK WARNING LAMP INDICATION
Does the ABS warning lamp activate?
Ye s©Carry out self-diagnosis. Refer to BR-56, BR-58.
No©Go to“3. CHECK WARNING LAMP INDICATION”in“2. Unexpected Pedal Action”,
BR-82.
NOTE:
ABS does not work when vehicle speed is under 10 km/h (6 MPH).
TROUBLE DIAGNOSES FOR SYMPTOMSABS
4. ABS Does Not Work
BR-84

5. Pedal Vibration and Noise=NLBR0108
1 INSPECTION START
Pedal vibration and noise inspection
SAT797A
©GO TO 2.
2 CHECK SYMPTOM
1. Apply brake.
2. Start engine.
Does the symptom appear only when engine is started?
Ye s©Carry out self-diagnosis. Refer to BR-56, BR-58.
No©GO TO 3.
3 RECHECK SYMPTOM
Does the symptom appear when electrical equipment switches (such as headlamp) are operated?
Ye s©GO TO 4.
No©Go to“3. CHECK WARNING LAMP INDICATION”in“2. Unexpected Pedal Action”,
BR-82.
4 CHECK WHEEL SENSOR
Check wheel sensor shield ground. For location of shield ground, refer to wiring diagram and“HARNESS LAYOUT”in EL
section.
Is wheel sensor shield grounded properly?
Ye s©Check ABS actuator and electric unit pin terminals for damage or the connection of ABS
actuator and electric unit harness connector. Reconnect ABS actuator and electric unit
harness connector. Then retest.
No©Repair.
NOTE:
ABS may operate and cause vibration under any of the following
conditions.
+Applying brake gradually when shifting or operating clutch.
+Low friction (slippery) road.
+High speed cornering.
+Driving over bumps and pot holes.
+Engine speed is over 5,000 rpm with vehicle stopped.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
5. Pedal Vibration and Noise
BR-85

6. ABS Warning Lamp Does Not Come On
When Ignition Switch Is Turned On
=NLBR0109
1 INSPECTION START
Warning lamp circuit inspection
NBR379
©GO TO 2.
2 CHECK FUSE
Check 10A fuse No. 30 for warning lamp. For fuse layout, refer to“POWER SUPPLY ROUTING”in EL section.
Is fuse OK?
Ye s©GO TO 3.
No©Replace fuse.
3 CHECK ABS CONTROL UNIT POWER SUPPLY CIRCUIT
1. Install 10A fuse.
2. Disconnect ABS actuator and electric unit connector.
3. Check voltage between control unit connector terminal *1 and ground after turning ignition switch“ON”.
NBR380
Does battery voltage exist after turning ignition switch“ON”?
Ye s©GO TO 5.
No©GO TO 4.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
6. ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On
BR-86

4 CHECK WARNING LAMP INDICATION
Disconnect ABS actuator and electric unit connector.
SBR759E
Does the ABS warning lamp activate?
Ye s©GO TO 6.
No©GO TO 5.
5 CHECK HARNESS FOR SHORT
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector terminal *1 and ground.
NBR381
Does battery voltage exist?
Ye s©Check combination meter. Refer to WARNING LAMPS in EL section.
No©Repair harness and connectors between fuse and ABS actuator and electric unit connec-
tor terminal *1.
6 CHECK HARNESS CONNECTOR
Check ABS actuator and electric unit pin terminals for damage or connection of ABS actuator and electric unit harness
connector. Reconnect ABS actuator and electric unit harness connector. Then reset.
OK©INSPECTION END
NG©Replace ABS actuator and electric unit.
TROUBLE DIAGNOSES FOR SYMPTOMSABS
6. ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On (Cont’d)
BR-87