NISSAN ALMERA N16 2003 Electronic Repair Manual

ENGINE SPEED SIGNAL
AT-385
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Wiring Diagram — AT — ENGSSECS007SH
YAT 3 5 8

AT-386
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ENGINE SPEED SIGNAL
Diagnostic Procedure
ECS007SI
1. CHECK DTC WITH ECM
Perform “Overall function check” for ignition signal. Refer to EC-369, "
Diagnostic Procedure" .
OK or NG
OK (With CONSULT-II)>>GO TO 2
OK (Without CONSULT-II)>>GO TO 3
NG >> Follow the construction of EC-369, "
Diagnostic Procedure" .
2. CHECK INPUT SIGNAL (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Read out the value of “ENGINE SPEED”.
Check engine speed changes according to throttle position.
OK or NG
OK >> GO TO 4
NG >> Check the following items:
●Harness for short or open between TCM and ECM
●Resistor and ignition coil
Refer to EC-365, "
IGNITION SIGNAL" .
3. CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 39 and ground.
OK or NG
OK >> GO TO 4
NG >> Check the following items:
●Harness for short or open between TCM and ECM
●Resistor and ignition coil
Refer to EC-365, "
IGNITION SIGNAL" .
SAT014K
SAT645J
Voltage (Idle speed):
Refer to EC-365, "
IGNITION SIGNAL" .
SCIA0740E

ENGINE SPEED SIGNAL
AT-387
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4.CHECK DTC
Perform AT- 3 8 3 , "
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE" .
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

AT-388
[ALL]
LINE PRESSURE SOLENOID VALVE
LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS007SJ
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.
NOTE:
The line pressure duty cycle value is not consistent when the
closed throttle position switch is “ON”. To confirm the line
pressure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is
“OFF”.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
NOTE:
The line pressure duty cycle value is not consistent when the closed throttle position switch is “ON”. To confirm the line pressure duty
cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is “OFF”.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
SCIA0735E
Monitor item Condition Specification
Line pressure solenoid valve dutySmall throttle opening
(Low line pressure)
↓
Large throttle opening
(High line pressure)Approximately 24%
↓
Approximately 95%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.4 - 14V
When depressing accelerator pedal
fully after warming up engine.0V
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.
●Harness or connectors
(The solenoid circuit is open or shorted.)
●Line pressure solenoid valve
: 10th judgement flicker

LINE PRESSURE SOLENOID VALVE
AT-389
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SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
After the repair, perform the following procedure to confirm the malfunction is eliminated.
With CONSULT-II
1. Start engine.
2. Select “SELF-DIAG RESULTS” mode for A/T with CONSULT-II.
3. With brake pedal depressed, shift the lever from “P” → “N” →
“D”→ “N” → “P” positions.
4. If DTC is detected, go to AT- 3 9 1 , "
Diagnostic Procedure" .
Without CONSULT-II
1. Start engine.
2. With brake pedal depressed, shift the lever from “P” → “N” →
“D”→ “N” → “P” positions.
3. Perform self-diagnosis.
Refer to AT-250, "
Diagnostic Procedure Without CONSULT-II" .
4. If DTC is detected, go to AT- 3 9 1 , "
Diagnostic Procedure" .
SAT014K
SCIA0704E

AT-390
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LINE PRESSURE SOLENOID VALVE
Wiring Diagram — AT — LPSV
ECS007SK
YAT 3 6 0

LINE PRESSURE SOLENOID VALVE
AT-391
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Diagnostic ProcedureECS007SL
1.CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 4 and ground.
OK or NG
OK >> GO TO 2
NG >>1.Remove control valve assembly. Refer to AT- 4 0 6 ,
"Control Valve Assembly and Accumulators" .
2. Check the following items:
–Line pressure solenoid valve
Refer to AT- 3 9 3 , "
Component Inspection" .
–Harness of terminal cord assembly for short or open
2.CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 2.
OK or NG
OK >> GO TO 3
NG >> Check the following items:
●Dropping resistor
Refer to AT- 3 9 3 , "
Component Inspection" .
●Harness for short or open between TCM terminal 2
and terminal cord assembly Resistance: 2.5 - 5Ω
SAT895JA
Resistance: 10 - 15Ω
SAT896JB

AT-392
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LINE PRESSURE SOLENOID VALVE
3. CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal 4 and TCM harness connector terminal 1.
If NG, check harness for short to ground and short to power.
3. Reinstall any part removed.
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 DTC
Perform AT-389, "
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE" .
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector. Resistance: Approx. 0Ω
SAT897JB

LINE PRESSURE SOLENOID VALVE
AT-393
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Component InspectionECS007SM
LINE PRESSURE SOLENOID VALVE
●For removal, refer to AT-406, "Control Valve Assembly and Accumulators" .
Resistance Check
●Check resistance between two terminals.
Operation Check
●Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
Solenoid valve Terminal No.Resistance
(Approx.)
Line pressure
solenoid valve4 Ground 2.5 - 5Ω
SAT898JA
SAT899JA

AT-394
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LINE PRESSURE SOLENOID VALVE
DROPPING RESISTOR
●Check resistance between two terminals.
Resistance: 10 - 15Ω
SAT003K