NISSAN LATIO 2009 Service Repair Manual

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Note 1: If wheel sens
or 2 for each wheel is indicated, check ABS actuator and electric unit (control unit) power supply voltage in addition
to wheel sensor circuit check.
Note 2: If multiple malfunctions are detected including CAN communication line [U1000], perform diagnosis for CAN communication line
first.
DATA MONITOR
Operation Procedure 1. After turning OFF the ignition switch, c onnect CONSULT-III to the data link connector.
2. Touch “ABS”, “DATA MONITOR” in order on the CONSULT-III screen. If “ABS” is not indicated, go to GI-36, " CONSULT-III Data Link Connector (DLC) Circuit " .
3. Return to the SELECT MONITOR ITEM screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
4. When “START” is touched, the data monitor screen is displayed.
Display Item List MAIN RELAY
[C1114] ABS actuator relay or circuit malfunction. BRC-26, " Actuator Mo-
tor, Motor Relay, and Cir-
cuit Inspection "
CAN COMM CIRCUIT
[U1000] • CAN communication line is open or shorted.
• ABS actuator and electric unit (control unit) internal malfunction
• Battery voltage for ECM is suddenly interrupted for approxi-
mately 0.5 second or more. BRC-28, " CAN Commu-
nication System Inspec-
tion " (Note 2)
Self-diagnostic item Malfunction detecting condition Check system Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
FR RH SENSOR
(km/h, MPH) × × × Wheel speed calculated by front RH
wheel sensor signal is displayed.
FR LH SENSOR
(km/h, MPH) × × ×
Wheel speed calculated by front LH
wheel sensor signal is displayed.
RR RH SENSOR
(km/h, MPH) × × × Wheel speed calculated by rear RH
wheel sensor signal is displayed.
RR LH SENSOR
(km/h, MPH) × × × Wheel speed calculated by rear LH
wheel sensor signal is displayed.
BATTERY VOLT
(V) × × × Voltage supplied to ABS actuator
and electric unit (control unit) is dis-
played.
STOP LAMP SW
(ON/OFF) × × × Stop lamp switch (ON/OFF) status is
displayed.
ABS WARN LAMP
(ON/OFF) –
× × ABS warning lamp (ON/OFF) status
is displayed.
FR LH IN SOL
(ON/OFF) –
× × Front LH IN ABS solenoid (ON/OFF)
status is displayed.
FR LH OUT SOL
(ON/OFF) –
× × Front LH OUT ABS solenoid (ON/
OFF) status is displayed.
FR RH IN SOL
(ON/OFF) –
× × Front RH IN ABS solenoid (ON/
OFF) status is displayed.
FR RH OUT SOL
(ON/OFF) –
× × Front RH OUT ABS solenoid (ON/
OFF) status is displayed.
RR LH IN SOL
(ON/OFF) –
× × Rear LH IN ABS solenoid (ON/OFF)
status is displayed.
RR LH OUT SOL
(ON/OFF) –
× × Rear LH OUT ABS solenoid (ON/
OFF) status is displayed.

CONSULT-III Data Link Connector (DLC) Circuit " .
3. Touch “ACTIVE TEST”.
4. The SELECT TEST ITEM screen is displayed.
5. Touch necessary test item.
6. With the “MAIN SIGNALS” display selected, touch “START”.
7. The Active Test screen will be displayed, so conduct the following test.
Solenoid Valve Operation Chart
NOTE:
• If active test is performed with brake pedal depr essed, pedal stroke may change. This is normal.
• “TEST IS STOPPED” is displayed approximately 10 seconds after operation starts.
• After “TEST IS STOPPED” is displayed, to perform test again, repeat Step 6.
ABS Motor
Touch “ON” and “OFF” on the screen. Check that ABS motor relay operates as shown in table below.
RR RH IN SOL
(ON/OFF) –
× × Rear RH IN ABS solenoid (ON/OFF)
status is displayed.
RR RH OUT SOL
(ON/OFF) –
× × Rear RH OUT ABS solenoid (ON/
OFF) status is displayed.
MOTOR RELAY
(ON/OFF) –
× × ABS motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF) –
× × ABS actuator relay signal (ON/OFF)
status is displayed.
ABS FAIL SIG
(ON/OFF) – –
×ABS fail signal (ON/OFF) status is
displayed.
EBD FAIL SIG
(ON/OFF) – –
×EBD fail signal (ON/OFF) status is
displayed.
EBD SIGNAL
(ON/OFF) – –
×EBD operation (ON/OFF) status is
displayed.
ABS SIGNAL
(ON/OFF) – –
×ABS operation (ON/OFF) status is
displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU TEST ITEM CONDITION JUDGEMENT
FR RH SOL
FR LH SOL
RR RH SOL
RR LH SOL Ignition switch is turned ON.Brake fluid pressure control operation
IN SOL OUT SOL
UP (Increase): OFF OFF
KEEP (Hold): ON OFF
DOWN (Decrease): ON ON

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NOTE:
• If active test is performed with brake pedal depressed, pedal stroke may change. This is normal.
• “TEST IS STOPPED” is displayed approx imately 10 seconds after operation starts.
Operation ON OFF
ABS actuator relay ON ON
ABS motor relay ON OFF

OK >> GO TO 2.
NG >> Repair or replace as necessary. YES >> GO TO 3.
NO >> Replace the wheel sensor. Refer to BRC-32, " Removal and Installation " .
.
Are tire pressure and size correct and is tire wear within specifications? YES >> GO TO 4.
NO >> Adjust tire pressure or replace tire(s). On-Vehicle Inspection and Service " or
RAX-5, " On-Vehi-
cle Inspection and Service " .
OK or NG OK >> GO TO 5.
NG >> Repair or replace as necessary. Refer to FAX-6, " Removal and Installation " or
RAX-5, " Removal
and Installation " .
OK >> GO TO 6.
NG >> Repair the circuit.

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Check continuity between ABS actuator and electric
unit (control unit) harness connector and wheel sensor
harness connector.
OK or NG OK >> Replace the ABS actuator and electric unit (control unit). Refer to
BRC-35, " Removal and Installa-
tion " .
NG >> Repair the circuit.
ABS Control Unit Inspection INFOID:0000000004307271
INSPECTION PROCEDURE YES >> Replace ABS actuator and electr
ic unit (control unit). Refer to BRC-35, " Removal and Installa-
tion " .
NO >> Inspection End.
Solenoid Valve System Inspection INFOID:0000000004307272
INSPECTION PROCEDURE YES >> GO TO 2.
NO >> Inspection End. Wheel sensor
ABS actuator and
electric unit (control unit) Wheel sensor
Continuity
Connector Terminals Connector Terminals
Front LH
E335
E51 1
Yes
16 2
Front RH 10
E52 1
9 2
Rear LH 17
B123 1
6 2
Rear RH 19
B124 1
8 2 Self-diagnosis results
CONTROLLER FAILURE Self-diagnosis results
FR LH IN ABS SOL
FR LH OUT ABS SOL FR RH IN ABS SOL
FR RH OUT ABS SOL RR LH IN ABS SOL
RR LH OUT ABS SOL RR RH IN ABS SOL
RR RH OUT ABS SOL

OK >> GO TO 3.
NG >> Repair or replace as necessary. OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-35, " Removal and Installation " .
NG >> Repair the circuit.
Actuator Motor, Motor Rela y, and Circuit Inspection INFOID:0000000004307273
INSPECTION PROCEDURE YES >> GO TO 2.
NO >> Inspection End. OK >> GO TO 3.
NG >> Repair or replace as necessary.

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1. Check voltage between ABS actuator and electric unit (control
unit) harness connector E33 and ground.
2. Check resistance between ABS actuator and electric unit (con- trol unit) connector E33 and ground.
OK or NG OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-35, " Removal and Installation " .
NG >> Repair the circuit.
ABS Control Unit Power a nd Ground Systems Inspection INFOID:0000000004307274
INSPECTION PROCEDURE YES >> GO TO 2.
NO >> Inspection End. OK >> GO TO 3.
NG >> Repair or replace as necessary.

OK >> Check the battery for loose terminals, low voltage, etc. Repair as necessary.
NG >> Repair the circuit.
CAN Communication System Inspection INFOID:0000000004307275
INSPECTION PROCEDURE YES >> Print out the self-diagnostic results, and refer to
LAN-17, " Trouble Diagnosis Flow Chart " .
NO >> Connector terminal is loose, damaged, open, or shorted. Ground
1
— Continuity sh ould exist.
4

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TROUBLE DIAGNOSES FOR SYMPTOMS
ABS Works Frequently INFOID:0000000004307276OK >> GO TO 2.
NG >> Carry out self-diagnosis. Refer to BRC-18, " CONSULT-III Function (ABS) " .
OK >> GO TO 3.
NG >> Repair or replace as necessary. On-Vehicle Inspection and Service " or
RAX-5, " On-Vehi-
cle Inspection and Service " .
OK or NG OK >> GO TO 4.
NG >> Repair as necessary. Basic Inspection " .
Is brake fluid pressure distribution normal? YES >> Inspection End.
NO >> Perform Basic Inspection. Refer to BRC-16, " Basic Inspection " .
Unexpected Pedal Action INFOID:0000000004307277OK >> GO TO 2.
NG >> Carry out self-diagnosis. Refer to BRC-18, " CONSULT-III Function (ABS) " .
YES >> Perform Basic Inspection. Refer to
BRC-16, " Basic
Inspection " .
NO >> GO TO 3.

8, " System Description " .
OK or NG OK >> GO TO 4.
NG >> Perform Basic Inspection. Refer to BRC-16, " Basic Inspection " .
OK >> Check ABS actuator and electric unit (contro
l unit) connector terminals for deformation, discon-
nection, looseness or damage. Reconnect ABS act uator and electric unit (control unit) harness
connector. Then retest.
NG >> Repair or replace as necessary.
Long Stopping Distance INFOID:00000000043072788, " System Description " .
OK or NG OK >> Go to
BRC-29, " ABS Works Frequently " .
NG >> Perform Basic Inspection. Refer to BRC-16, " Basic Inspection " .
ABS Does Not Work INFOID:0000000004307279
CAUTION:
The ABS does not operate when the vehicle speed is 10 km/h (6 MPH) or less.OK >> Carry out self-diagnosis. Refer to
BRC-18, " CONSULT-III Function (ABS) " .
NG >> Go to BRC-16, " Basic Inspection " .
Pedal Vibration or ABS Operation Noise INFOID:0000000004307280
NOTE:
During ABS activation, pedal vibration may be felt and a noise may be heard. This is normal and does not indi-
cate a malfunction. YES >> Carry out self-diagnosis. Refer to
BRC-18, " CONSULT-III Function (ABS) " .