2002 NISSAN TERRANO check engine

Torque Converter Clutch Solenoid Valve
DESCRIPTION
The torque converter clutch solenoid valve is activated, with the
gear in D
4, by the TCM in response to signals sent from the vehicle
speed and throttle (accelerator) position sensors. Torque converter
clutch piston operation will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...Check items
(Possible cause)
: T/C CLUTCH SOL/V
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.IHarness or connectors
(The solenoid circuit is open or
shorted.)
IT/C clutch solenoid valve
: 7th judgement flicker
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item Condition Specification
Torque converter clutch solenoid valve
dutyLock-up ªOFFº
"
Lock-up ªONºApproximately
4%
"
Approximately
94%
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1) Start engine.
2) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
3) Drive vehicle in D
1,D2,D3,D4,D4lock-up
position.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle in D
1,D2,D3,D4,D4lock-up
position.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT342HA
SAT818H
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
AT-72

DIAGNOSTIC PROCEDURE
CHECK GROUND CIRCUIT.
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly
connector in engine compartment.
3. Check resistance between terminalq
6
and ground.
Resistance: 10 - 20W
OK
ENG
1. Remove oil pan. Refer
to AT-123.
2. Check the following
items:
ITorque converter clutch
solenoid valve
Refer to ªCOMPONENT
INSPECTIONº on next
page.
IHarness of terminal cord
assembly for short or
open
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to ªOFFº position.
2. Disconnect TCM harness connector.
3. Check resistance between terminalq
6
and TCM harness connector terminal
q
3.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
ENG
Repair open circuit or short
to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-72.
OK
ENG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
YAT312
YAT313
H
H
H
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Torque Converter Clutch Solenoid Valve
(Cont'd)
AT-73

A/T Fluid Temperature Sensor and TCM Power
Source
DESCRIPTION
The A/T fluid temperature sensor detects the A/T fluid temperature
and sends a signal to the TCM.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...Check items
(Possible cause)
:
BATT/FLUID TEMP SEN
TCM receives an excessively low or
high voltage from the sensor.IHarness or connectors
(The sensor circuit is open or
shorted.)
IA/T fluid temperature sensor
: 8th judgement flicker
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item Condition Specification
A/T fluid temperature sensorCold [20ÉC (68ÉF)]
"
Hot [80ÉC (176ÉF)]Approximately
1.5V
"
Approximately
0.5V
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1) Start engine.
2) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full open position, engine speed higher than 450 rpm
and driving for more than 10 minutes.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full open position, engine speed higher than 450 rpm
and driving for more than 10 minutes.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT342HA
SAT821H
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
AT-76

DIAGNOSTIC PROCEDURE
CHECK TCM POWER SOURCE.
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Check voltage between TCM terminals
q
42,q47and ground.
Battery voltage should exist.
OK
ENG
Check the following items:
IHarness for short or
open between ignition
switch and TCM (Main
harness)
IIgnition switch and fuse
Refer to EL section
(ªPOWER SUPPLY
ROUTINGº).
CHECK A/T FLUID TEMPERATURE
SENSOR WITH TERMINAL CORD
ASSEMBLY.
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly
connector in engine compartment.
3. Check resistance between terminalsq
6
andq7when A/T is cold.
Resistance:
Cold [20ÉC (68ÉF)]
Approximately 2.5 kW
4. Reinstall any part removed.
OK
ENG
1. Remove oil pan.
2. Check the following
items:
IA/T fluid temperature
sensor
Refer to ªCOMPONENT
INSPECTIONº on next
page.
IHarness of terminal cord
assembly for short or
open
qA
(Go to next page.)
YAT316
YAT317
H
H
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM Power
Source (Cont'd)
AT-77

qA
CHECK INPUT SIGNAL OF A/T FLUID
TEMPERATURE SENSOR.
1. Start engine.
2. Select ªECU INPUT SIGNALSº in
Data Monitor.
3. Read out the value of ªFLUID
TEMP SEº.
Voltage:
Cold [20ÉC (68ÉF)]®
Hot [80ÉC (176ÉF)]:
Approximately
1.5V®0.5V
-----------------------------------------------------------------------------------------------------------------------OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM ter-
minalq
47and ground while warm-
ing up A/T.
Voltage:
Cold [20ÉC (68ÉF)]®
Hot [80ÉC (176ÉF)]:
Approximately
1.5V®0.5V
OK
ENG
Check the following item:
IHarness for short or
open between TCM and
terminal cord assembly
(Main harness)
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-76.
OK
ENG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
COMPONENT INSPECTION
A/T fluid temperature sensor
IFor removal, refer to AT-113.
ICheck resistance between terminalsq
6andq7while changing
temperature as shown at left.
Temperature ÉC (ÉF) Resistance
20 (68) Approximately 2.5 kW
80 (176) Approximately 0.3 kW
YAT318
YAT319
H
H
H
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM Power
Source (Cont'd)
AT-78

Engine Speed Signal
DESCRIPTION
The engine speed signal is sent from the ECM to the TCM.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...Check items
(Possible cause)
:
ENGINE SPEED SIG
TCM does not receive the proper volt-
age signal from ECM.IHarness or connectors
(The sensor circuit is open or
shorted.)
:
9th judgement flicker
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1) Start engine.
2) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
3) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full throttle position and driving for more than 10 sec-
onds.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) Drive vehicle under the following conditions:
Selector lever in ªDº position, vehicle speed higher than
10 km/h (6 MPH), throttle opening greater than 1/8 of the
full throttle position and driving for more than 10 sec-
onds.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.SAT823H
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
AT-80

DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (self-
diagnostic results) for engine control.
Check ignition signal circuit condition.
OK
ENG
Check ignition signal circuit
for engine control. Refer to
EC section [TROUBLE
DIAGNOSIS FOR ªIGN
SIGNAL-PRIMARYº (DTC
21)].
CHECK INPUT SIGNAL.
1. Start engine.
2. Select ªECU INPUT SIGNALSº in
Data Monitor.
3. Read out the value of ªENGINE
SPEEDº.
Check engine speed changes
according to throttle position.
-----------------------------------------------------------------------------------------------------------------------OR -----------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM ter-
minalq
39and ground.
Voltage (Idle speed):
Approximately 0.8V
Voltage (2,000 rpm):
Approximately 2.2V
OK
ENG
Check the following items:
IHarness for short or
open between TCM and
ECM
IResistor
Refer to EC section
[TROUBLE DIAGNOSIS
FOR ªIGN SIGNAL-PRI-
MARYº (DTC 21)].
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-80.
OK
ENG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
YAT320
H
H
H
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
Engine Speed Signal (Cont'd)
AT-81

Line Pressure Solenoid Valve
DESCRIPTION
The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...Check items
(Possible cause)
: LINE PRESSURE S/V
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.IHarness or connectors
(The solenoid circuit is open or
shorted.)
ILine pressure solenoid valve
: 10th judgement flicker
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item Condition Specification
Line pressure solenoid valve dutyLow line-pressure
(Small throttle opening)
"
High line-pressure
(Large throttle opening)Approximately
29%
"
Approximately
94%
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1) Start engine.
2) Select ªSELF-DIAG RESULTSº mode with CONSULT-II.
3) With brake pedal depressed, shift the lever from ªPº,
ªNº,ªDº,ªNº,ªPº positions.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1) Start engine.
2) With brake pedal depressed, shift the lever from ªPº,
ªNº,ªDº,ªNº,ªPº positions.
3) Perform self-diagnosis.
Refer to SELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II), AT-15.
SAT341H
SAT824H
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
AT-84