NISSAN TEANA 2008 Service Manual

EC-320
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
P2A00, P2A03 A/F SENSOR 1
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
 IPDM E/R harness connector F12
 15A fuse (No. 46)
 Harness for open or short between A/F sensor 1 and fuse
>> Repair or replace harness or connectors.
8.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
9.CHECK INTERMITTENT INCIDENT
Perform GI-35, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace malfunctioning part.
10.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel ratio (A/F) sensor 1.
CAUTION:
 Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
 Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner and approved anti-seize lubricant.
>> INSPECTION END
DTCA/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
P2A00 1 F271
F845
Existed 249
P2A03 2 F64153
257
DTCA/F sensor 1 ECM
Ground Continuity
Bank Connector Terminal Connector Terminal
P2A00 1 F271
F845
Ground Not existed 249
P2A03 2 F64153
257

ASCD BRAKE SWITCH
EC-321
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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ASCD BRAKE SWITCH
DescriptionINFOID:0000000003858142
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by two kinds of input (ON/OFF signal).
Refer to EC-51, "
System Diagram" for the ASCD function.
Component Function CheckINFOID:0000000003856821
1.CHECK ASCD BRAKE SWITCH FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-321, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856822
1.CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD brake switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
 Fuse block (J/B) connector E103
 10A fuse (No.3)
 Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit, short to ground or short to power in harness or connectors.
Monitor item Condition Indication
BRAKE SW1 Brake pedalSlightly depressed OFF
Fully released ON
ECM
Ground Condition Voltage
Connector Terminal
E1611 0
(ASCD brake
switch signal)Ground Brake pedalSlightly depressed Approx. 0 V
Fully released Battery voltage
ASCD brake switch
Ground Voltage
Connector Terminal
E49 1 Ground Battery voltage

EC-322
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
ASCD BRAKE SWITCH
3.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ASCD BRAKE SWITCH
Refer to EC-322, "
Component Inspection (ASCD Brake Switch)".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace ASCD brake switch.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (ASCD Brake Switch)INFOID:0000000003858143
1.CHECK ASCD BRAKE SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK ASCD BRAKE SWITCH-II
1. Adjust ASCD brake switch installation. Refer to BR-6, "
Inspection and Adjustment".
2. Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ASCD brake switch.
ASCD brake switch ECM
Continuity
Connector Terminal Connector Terminal
E49 2 E16 110 Existed
Terminals Condition Continuity
1 and 2 Brake pedalFully released. Existed
Slightly depressed. Not existed
Terminals Condition Continuity
1 and 2 Brake pedalFully released. Existed
Slightly depressed. Not existed

ASCD INDICATOR
EC-323
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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ASCD INDICATOR
DescriptionINFOID:0000000003856824
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and
SET, and is integrated in combination meter.
CRUISE lamp illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD
system is ready for operation.
SET lamp illuminates when the following conditions are met.
 CRUISE lamp is illuminated.
 SET/COAST switch on ASCD steering switch is turned ON while vehicle speed is within the range of the
ASCD setting.
SET lamp remains lit during ASCD control.
Refer to EC-51, "
System Diagram" for the ASCD function.
Component Function CheckINFOID:0000000003856825
1.CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-323, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856826
1.CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble diagnosis for DTC U1000, U1001. Refer to EC-135, "
Diagnosis Procedure".
2.CHECK COMBINATION METER FUNCTION
Refer to MWI-33, "
CONSULT-III Function (METER/M&A)".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-35, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Repair or replace malfunctioning part.
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP  Ignition switch: ON MAIN switch: Pressed at the
1st time →
at the 2nd timeON → OFF
SET LAMP MAIN switch: ON
 When vehicle speed is be-
tween 40 km/h (25 MPH) and
144 km/h (89 MPH) ASCD: Operating ON
 ASCD: Not operating OFF

EC-324
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
COOLING FAN
DescriptionINFOID:0000000003856827
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to EC-60, "
System Diagram".
Component Function CheckINFOID:0000000003856828
1.CHECK COOLING FAN FUNCTION
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percent.
Without CONSULT-III
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PCS-11, "
Diagnosis
Description".
2. Check that cooling fan operates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-324, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856829
1.CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2, -3.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
Cooling fan speedCooling fan motor terminals
(+) (−)
Middle (MID)1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
High (HI) 1 and 2 3 and 4
Cooling fan relay
Ground Voltage
Connector Terminal
E57
(cooling fan relay-2)2
Ground Battery voltage 5
E59
(cooling fan relay-3)2
5

COOLING FAN
EC-325
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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2.DETECT MALFUNCTIONING PART
Check the following.
 40A fusible link (letter K)
 10A fuse (No.42)
 IPDM E/R harness connector E10
 Harness for open or short between cooling fan relay-2 and battery
 Harness for open or short between cooling fan relay-3 and battery
 Harness for open or short between cooling fan relay-2 and IPDM E/R
 Harness for open or short between cooling fan relay-3 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors.
3. Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1. Disconnect cooling fan motor-1 harness connector.
2. Check the voltage between cooling fan motor-1 harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 40A fusible link (letter M)
 Harness for open or short between cooling fan motor-1 and battery
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN MOTOR CIRCUIT-I
1. Disconnect cooling fan motor-2 harness connector.
2. Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.
Cooling fan relay IPDM E/R
Continuity
Connector Terminal Connector Terminal
E57
(cooling fan relay-2)1E1142
Existed
E59
(cooling fan relay-3)1E1034
Cooling fan motor-1
Ground Voltage
Connector Terminal
E3011
Ground Battery voltage
2

EC-326
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 Harness for open or short between cooling fan motor-1 and cooling fan relay-2
 Harness for open or short between cooling fan motor-1 and cooling fan relay-3
 Harness for open or short between cooling fan motor-2 and cooling fan relay-2
 Harness for open or short between cooling fan motor-2 and cooling fan relay-3
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK COOLING FAN MOTOR CIRCUIT-II
1. Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E70, E305
 Harness for open or short between cooling fan motor-1 and IPDM E/R
 Harness for open or short between cooling fan motor-2 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
10.CHECK COOLING FAN MOTOR CIRCUIT-III
1. Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
Cooling fan relay Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E57
(cooling fan relay-2)3E302
(Cooling fan motor-2)2
Existed 7E301
(Cooling fan motor-1)3
E59
(cooling fan relay-3)3E302
(Cooling fan motor-2)1
7E301
(Cooling fan motor-1)4
IPDM E/R Cooling fan motor
Continuity
Connector Terminal Connector Terminal
E1035E301
(Cooling fan motor-1)4
Existed
38E302
(Cooling fan motor-2)1

COOLING FAN
EC-327
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
11 .CHECK COOLING FAN MOTOR CIRCUIT-IV
1. Check the continuity between cooling fan motor-2 harness connector and ground.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
12.CHECK COOLING FAN RELAYS-2 AND -3
Refer to EC-328, "
Component Inspection (Cooling Fan Relay)".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Replace malfunctioning cooling fan relay.
13.CHECK COOLING FAN MOTORS-1 AND -2
Refer to EC-327, "
Component Inspection (Cooling Fan Motor)".
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace malfunctioning cooling fan motor.
14.CHECK INTERMITTENT INCIDENT
Perform GI-35, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair or replace harness connectors.
Component Inspection (Cooling Fan Motor)INFOID:0000000003856830
1.CHECK COOLING FAN MOTOR
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor harness connector.
3. Supply cooling fan motor terminals with battery voltage and check operation.
Cooling fan motor
Ground Continuity
Connector Terminal
E57
(cooling fan relay-2)6
Ground Existed
E59
(cooling fan relay-3)6
Cooling fan motor-2
Ground Continuity
Connector Terminal
E3023
Ground Existed
4

EC-328
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay)INFOID:0000000003856831
1.CHECK COOLING FAN RELAY
1. Disconnect cooling fan relays -2, -3 harness connectors.
2. Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan relay.
ConditionTe r m i n a l s
(+) (−)
Cooling fan motorA1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
B 1, 2 3, 4
Terminals Conditions Continuity
3 and 5
6 and 712 V direct current supply between terminals 1 and 2 Existed
No current supply Not existed
SEF745U

ELECTRICAL LOAD SIGNAL
EC-329
< COMPONENT DIAGNOSIS >[VQ25DE, VQ35DE]
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ELECTRICAL LOAD SIGNAL
DescriptionINFOID:0000000003856832
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from BCM to ECM via IPDM E/R.
Component Function CheckINFOID:0000000003856833
1.CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to EC-329, "
Diagnosis Procedure".
2.CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Go to EC-329, "
Diagnosis Procedure".
3.CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-329, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003856834
1.INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to EC-329, "
Compo-
nent Function Check".
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to DEF-3, "
Work Flow".
Monitor item Condition Indication
LOAD SIGNAL Rear window defogger switchON ON
OFF OFF
Monitor item Condition Indication
LOAD SIGNAL Lighting switchON at 2nd position ON
OFF OFF
Monitor item Condition Indication
HEATER FAN SW Heater fan control switchON ON
OFF OFF