2001 NISSAN ALMERA ECU

4 CHECK THROTTLE POSITION SWITCH CIRCUIT (WITH CONSULT-II)
With CONSULT-II
1. Apply vacuum to the throttle opener, then check the following. Refer to steps 1 to 5 of ªPreparationº, ªTCM SELF-DIAG-
NOSTIC PROCEDURE (No Tools)º, AT-63.
2. Turn ignition switch to ªONº position.
(Do not start engine.)
3. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
4. Read out ªCLOSED THL/SWº and ªW/O THRL/P-SWº depressing and releasing accelerator pedal.
Check the signal of throttle position switch is indicated properly.
MTBL0011
SAT702J
OK or NG
OK©GO TO 6.
NG©Check the following items:
+Throttle position switch Ð Refer to ªComponents Inspectionº, AT-267.
+Harness for short or open between ignition switch and throttle position switch (Main
harness)
+Harness for short or open between throttle position switch and TCM (Main harness)
DTC P1705 THROTTLE POSITION SENSOREURO-OBD
Diagnostic Procedure (Cont'd)
AT-265

2 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 terminals 6 and 7 when A/T is cold.
Resistance:
Cold [20ÉC (68ÉF)]
Approximately 2.5 kW
SAT912JB
4. Reinstall any part removed.
OK or NG
OK (With CONSULT-II)©GO TO 3.
OK (Without CONSULT-
II)©GO TO 4.
NG©1. Remove oil pan.
2. Check the following items:
+A/T fluid temperature sensor
Refer to ªComponent Inspectionº, AT-280.
+Harness of terminal cord assembly for short or open
3 CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
3. Read out the value of ªFLUID TEMP SEº.
Voltage:
Cold [20ÉC (68ÉF)]®Hot [80ÉC (176ÉF)]:
Approximately 1.5V®0.5V
SAT614J
OK or NG
OK©GO TO 5.
NG©Check the following item:
+Harness for short or open between TCM, ECM and terminal cord assembly (Main har-
ness)
+Ground circuit for ECM
Refer to EC-178, ªTROUBLE DIAGNOSIS FOR POWER SUPPLYº.
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
EURO-OBD
Diagnostic Procedure (Cont'd)
AT-278

Diagnostic ProcedureNJAT0325
1 CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
3. Read out the value of ªVHCL/S SE´MTRº while driving.
Check the value changes according to driving speed.
SAT614J
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 40 and ground while driving at 2 to 3 km/h (1 to 2 MPH) for1m(3ft)ormore.
Voltage:
Voltage varies between less than 1V and more than 4.5V.
SAT465JB
OK or NG
OK©GO TO 2.
NG©Check the following items:
+Vehicle speed sensor and ground circuit for vehicle speed sensor
Refer to EL-144, ªMETERS AND GAUGESº.
+Harness for short or open between TCM and vehicle speed sensor (Main harness)
2 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-282.
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 con-
nector.
DTC VHCL SPEED SEN´MTR VEHICLE SPEED SENSOR´MTREURO-OBD
Diagnostic Procedure
AT-285

2. Engine Cannot Be Started In ªPº and ªNº
Position
=NJAT0332SYMPTOM:
+Engine cannot be started with selector lever in ªPº or ªNº
position.
+Engine can be started with selector lever in ªDº, ª2º, ª1º
or ªRº position.
1 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªECU INPUT SIGNALSº in ªDATA MONITORº show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ª21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position Switches Circuit Checks)º, AT-334.
No©GO TO 2.
2 CHECK PNP SWITCH INSPECTION
Check for short or open of PNP switch harness connector terminals 1 and 2.
Refer to ª21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches Circuit
Checks)º, AT-334.
SAT408JA
OK or NG
OK©GO TO 3.
NG©Repair or replace PNP switch.
TROUBLE DIAGNOSES FOR SYMPTOMS
2. Engine Cannot Be Started In ªPº and ªNº Position
AT-299

4. In ªNº Position, Vehicle Moves=NJAT0334SYMPTOM:
Vehicle moves forward or backward when selecting ªNº posi-
tion.
1 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªECU INPUT SIGNALSº in ªDATA MONITORº show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ª21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position Switches Circuit Checks)º, AT-334.
No©GO TO 2.
2 CHECK CONTROL CABLE
Check control cable. Refer to AT-352.
SAT023JB
OK or NG
OK©GO TO 3.
NG©Adjust control cable. Refer to AT-352.
TROUBLE DIAGNOSES FOR SYMPTOMS
4. In ªNº Position, Vehicle Moves
AT-301

9. A/T Does Not Shift: D1®D2Or Does Not
Kickdown: D
4®D2=NJAT0339SYMPTOM:
A/T does not shift from D
1to D2at the specified speed.
A/T does not shift from D
4to D2when depressing accelerator
pedal fully at the specified speed.
1 CHECK SYMPTOM
Are 7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position and 8. Vehicle Cannot Be Started From D1OK?
YesorNo
Ye s©GO TO 2.
No©Go to 7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position and 8. Vehicle Can-
not Be Started From D
1, AT-308, 311.
2 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªECU INPUT SIGNALSº in ªDATA MONITORº show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ª21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position Switches Circuit Checks)º, AT-334.
No©GO TO 3.
3 CHECK VEHICLE SPEED SENSOR´A/T (REVOLUTION SENSOR) AND CHECK VEHICLE SPEED
SENSOR´MTR CIRCUIT
Check vehicle speed sensor´A/T (revolution sensor) and vehicle speed sensor´MTR circuit. Refer to AT-126 (General and
except for Euro-OBD), AT-195 (EURO-OBD) and AT-131 (General and except for Euro-OBD), AT-281 (EURO-OBD).
OK or NG
OK©GO TO 4.
NG©Repair or replace vehicle speed sensor´A/T (revolution sensor) and vehicle speed
sensor´MTR circuits.
TROUBLE DIAGNOSES FOR SYMPTOMS
9. A/T Does Not Shift: D1®D2Or Does Not Kickdown: D4®D2
AT-314

10. A/T Does Not Shift: D2®D3=NJAT0340SYMPTOM:
A/T does not shift from D
2to D3at the specified speed.
1 CHECK SYMPTOM
Are 7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position and 8. Vehicle Cannot Be Started From D1OK?
YesorNo
Ye s©GO TO 2.
No©Go to 7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position and 8. Vehicle Can-
not Be Started From D
1, AT-308, 311.
2 CHECK PNP SWITCH CIRCUIT
With CONSULT-II
Does ªECU INPUT SIGNALSº in ªDATA MONITORº show damage to PNP switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to PNP switch circuit?
SAT367J
YesorNo
Ye s©Check PNP switch circuit. Refer to ª21. TCM Self-diagnosis Does Not Activate (PNP,
Overdrive Control and Throttle Position Switches Circuit Checks)º, AT-334.
No©GO TO 3.
3 CHECK THROTTLE POSITION SENSOR
Check throttle position sensor. Refer to EC-207, ªDTC P0120 THROTTLE POSITION SENSORº.
SAT004K
OK or NG
OK©GO TO 4.
NG©Repair or replace throttle position sensor.
TROUBLE DIAGNOSES FOR SYMPTOMS
10. A/T Does Not Shift: D2®D3
AT-317

14. Lock-up Is Not Released=NJAT0344SYMPTOM:
Lock-up is not released when accelerator pedal is released.
1 CHECK THROTTLE POSITION SWITCH CIRCUIT
With CONSULT-II
Does ªECU INPUT SIGNALSº in ªDATA MONITORº show damage to closed throttle position switch circuit?
Without CONSULT-II
Does self-diagnosis show damage to closed throttle position switch circuit?
SAT367J
YesorNo
Ye s©Check closed throttle position switch circuit. Refer to ª21. TCM Self-diagnosis Does Not
Activate (PNP, Overdrive Control and Throttle Position Switches Circuit Checks)º, AT-334.
No©GO TO 2.
2 CHECK SYMPTOM
Check again.
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 con-
nector.
TROUBLE DIAGNOSES FOR SYMPTOMS
14. Lock-up Is Not Released
AT-327