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DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0232S04CAUTION:
IAlways drive vehicle at a safe speed.
IBe careful not to rev engine into the red zone on the
tachometer.
NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº and wait at least 5 seconds before conducting
the next test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for ªCVTº with CONSULT-II.
2) Make sure that output voltage of CVT fluid temperature sne-
sor is within the range below.
FLUID TEMP SEN: 0.5 - 1.5V
If out of range, drive the vehicle to decrease the voltage
(warm up the fluid) or stop engine to increase the voltage
(cool down the fluid)
3) Select ªDATA MONITORº mode for ªENGINEº with CONSULT-
II.
4) Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: 1.3V
Selector lever: D position
ENG SPEED: 450 rpm or more
If the check result is NG, go to ªDiagnostic Procedureº, AT-97.
With GST
Follow the procedure ªWith CONSULT-IIº.
SAT651J
SAT971J
SAT654J
DTC P1791 CVT FLUID PRESSURE SENSOR
Description (Cont'd)
AT-95
Page 98 of 2267
Wiring Diagram Ð AT Ð FPSNCAT0233
YAT209
TCM
(TRANSMISSION
CONTROL MODULE): Detectable line for DTC
: Non-detectable line for DTC CONTROL VALVE
(CVT FLUID
PRESSURE
SENSOR)ECM
DTC P1791 CVT FLUID PRESSURE SENSOR
Wiring Diagram Ð AT Ð FPS
AT-96
Page 99 of 2267

Diagnostic ProcedureNCAT0234
1 CHECK PRESSURE SENSOR
Refer to ªComponent Inspectionº, AT-98.
OK or NG
OK (With CONSULT-II)©GO TO 2.
OK (Without CONSULT-II)©GO TO 3.
NG©Repair or replace pressure sensor.
2 CHECK INPUT SIGNAL (With CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select ªECU Input Item Parameter Listº in ªDATA MONITORº mode for ªCVTº with CONSULT-II.
3. Read out the value of ªLINE PRES SENº while driving.
IThrottle valve fully closed (PL Duty: 4%): Approx. 1.0V
IThrottle valve fully depressed (PL Duty: 94%): Approx. 4.0V
OK or NG
OK©GO TO 4.
NG©Check the following items:
IHarness for short or open between TCM, ECM and CVT fluid pressure sensor (Main
harness)
IGround circuit for ECM
Refer to EC section (ªTROUBLE DIAGNOSIS FOR POWER SUPPLYº).
3 CHECK INPUT SIGNAL (Without CONSULT-II)
Without CONSULT-II
Refer to ªComponent Inspectionº, AT-98.
OK or NG
OK©GO TO 4.
NG©Check the following items:
IHarness for short or open between TCM, ECM and CVT fluid pressure sensor (Main
harness).
IGround circuit for ECM
Refer to EC section (ªTROUBLE DIAGNOSIS FOR POWER SUPPLYº).
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-95.
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 P1791 CVT FLUID PRESSURE SENSOR
Diagnostic Procedure
AT-97
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Component Inspection=NCAT0235CVT FLUID PRESSURE SENSORNCAT0235S01IStart engine.
ICheck voltage between terminals 1 and 6, 6 and 10.
Terminal No. Voltage
16Approx. 0.5 - 4.5V
610Approx. 4.5 - 5.5V
SAT691J CVT fluid pressure sensor connector
DTC P1791 CVT FLUID PRESSURE SENSOR
Component Inspection
AT-98
Page 101 of 2267
Description
ªCVT SAFE FUNCTIONº is function to protect CVT.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: CVT SAFE FUNCTION
TCM is malfunctioning TCM
: 10th judgement flicker
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for CVT with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
Without CONSULT-II
1) Start engine.
2) Perform self-diagnosis. Refer to SELF-DIAGNOSTIC PROCE-
DURE (Without CONSULT-II), AT-25.SAT651J
SAT971J
SAT455FALight
Shade
CVT SAFE FUNCTION
Description
AT-99
Page 102 of 2267
Diagnostic Procedure
1 CHECK INPUT SIGNAL (With CONSULT-II)
1. Turn ignition switch to ªONº and select ªSELF DIAG RESULTSº mode for CVT with CONSULT-II.
2. Touch ªERASEº.
Perform ªDIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDUREº. See previous page.
Is the ªCVT SAFE FUNCTIONº displayed again?
YES©Replace TCM
NO©INSPECTION END
CVT SAFE FUNCTION
Diagnostic Procedure
AT-100
Page 103 of 2267
DescriptionNCAT0239The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the CVT.
ON BOARD DIAGNOSIS LOGICNCAT0239S01
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: CONTROL UNIT (RAM)
: CONTROL UNIT (ROM)TCM memory (RAM) or (ROM) is mal-
functioning.TCM
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0239S02NOTE:
If ªDIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DUREº has been previously conducted, always turn ignition
switch ªOFFº and wait at least 5 seconds before conducting
the next test.
With CONSULT-II
1) Turn ignition switch ªONº and select ªDATA MONITORº mode
for CVT with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
SAT574J
SAT651J
SAT971J
CONTROL UNIT (RAM), CONTROL UNIT (ROM)
Description
AT-101
Page 104 of 2267
Diagnostic Procedure=NCAT0240
1 CHECK DTC
With CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for CVT with CONSULT-II.
2. Touch ªERASEº.
PERFORM DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE.
See previous page.
Is the ªCONTROL UNIT (RAM) or CONTROL UNIT (ROM)º displayed again?
Ye s©Replace TCM.
No©INSPECTION END
CONTROL UNIT (RAM), CONTROL UNIT (ROM)
Diagnostic Procedure
AT-102