2000 NISSAN PATROL Electronic Repair Manual

Description
The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ...Check item
(Possible cause)
:
CONTROL UNIT (RAM)
TCM memory (RAM) or (ROM) is mal-
functioning.TCM
:CONTROL UNIT (ROM)
SELF-DIAGNOSIS CODE CONFIRMATION
PROCEDURE
NOTE:
If ªSELF-DIAGNOSIS CODE CONFIRMATION PROCEDUREº
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 A/T with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
SAT574J
SAT014K
SAT971J
TROUBLE DIAGNOSIS FOR CONTROL UNIT (RAM), CONTROL UNIT (ROM)
AT-1087

Diagnostic Procedure
1 CHECK DTC
WITH CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for A/T with CONSULT-II.
2. Touch ªERASEº.
Perform Self-diagnosis Code confirmation procedure.
See previous page.
Is the ªCONTROL UNIT (RAM) or CONTROL UNIT (ROM)º displayed again?
YescReplace TCM.
NocINSPECTION END
TROUBLE DIAGNOSIS FOR CONTROL UNIT (RAM), CONTROL UNIT (ROM)
AT-1088

Description
The TCM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the A/T.
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: CONT UNIT (EEP ROM)TCM memory (EEP ROM) is malfunc-
tioning.TCM
SELF-DIAGNOSIS CODE CONFIRMATION
PROCEDURE
NOTE:
If ªSELF-DIAGNOSIS CODE CONFIRMATION PROCEDUREº
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 A/T with CONSULT-II.
2) Start engine.
3) Run engine for at least 2 seconds at idle speed.
SAT574J
SAT014K
SAT971J
TROUBLE DIAGNOSIS FOR CONTROL UNIT (EFP ROM)
AT-1089

Diagnostic Procedure
1 CHECK DTC
WITH CONSULT-II
1. Turn ignition switch ªONº and select ªSELF DIAG RESULTSº mode for A/T with CONSULT-II.
2. Move selector lever to ªRº position.
3. Depress accelerator pedal (Full throttle position).
4. Touch ªERASEº.
5. Turn ignition switch ªOFFº position for 10 seconds.
Perform Self-diagnosis Code confirmation procedure.
See previous page.
Is the ªCONT UNIT (EEP ROM)º displayed again?
YescReplace TCM.
NocINSPECTION END
TROUBLE DIAGNOSIS FOR CONTROL UNIT (EFP ROM)
AT-1090

PNP, Overdrive Control, A/T Mode or
Accelerator Position Switches
DESCRIPTION
+PNP switch
Detects the selector lever position and sends a signal to the
TCM.
+Overdrive control switch, A/T mode switch
Detects the overdrive control switch position (ON or OFF)
and sends a signal to the TCM.
+Accelerator position switch
Consists of a wide open throttle position switch and a closed
Accelerator position switch.
The wide open throttle position switch sends a signal to the
TCM when the throttle valve is open at least 1/2 of the full
throttle position. The closed throttle position switch sends a
signal to the TCM when the throttle valve is fully closed.
SAT218JA
SAT220JA
SAT222JA
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
AT-1091

DIAGNOSTIC PROCEDURE
CHECK PNP SWITCH CIRCUIT.
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Select ªTCM INPUT SIGNALSº
in Data Monitor.
3. Read out ªR, N, D, 2 and 1
position switchesº moving
selector lever to each position.
Check the signal of the selector
lever position is indicated prop-
erly.
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªONº
position. (Do not start engine.)
2. Check voltage between TCM
terminals
V26,V27,V34,V35,V36
and ground while moving selec-
tor lever through each position.
Voltage:
B: Battery voltage
0: 0V
OK
cNG
Check the following items:
+PNP switch
Refer to ªCOMPONENT
INSPECTIONº,
AT-1095.
+Harness for short or
open between ignition
switch and PNP switch
(Main harness)
+Harness for short or
open between PNP
switch and TCM (Main
harness)
+Diode
VA
(Go to next page.)
Lever positionTerminal No.V36V35V34V27V26
P, NB0000
R0B000
D00B00
2 000B0
1 0000B
SAT738J
SAT227J
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
PNP, Overdrive Control, A/T Mode or
Accelerator Position Switches (Cont'd)
AT-1092

VA
CHECK OVERDRIVE CONTROL
SWITCH CIRCUIT.
Ð Except for the Middle East Ð
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Select ªTCM INPUT SIGNALSº
in Data Monitor.
3. Read out ªOVERDRIVE
SWITCHº.
Check the signal of the over-
drive control switch is indicated
properly.
(Overdrive control switch ªONº
displayed on CONSULT-II
means overdrive ªOFFº.)
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Check voltage between TCM
terminal
V22and ground when
overdrive control switch is ªONº
and ªOFFº.
OK
cNG
Check the following items.
+Overdrive control switch
Refer to ªCOMPONENT
INSPECTIONº,
AT-1095.
+Harness for short or
open between TCM and
overdrive control switch
(Main harness)
+Harness for short or
open of ground circuit
for overdrive control
switch (Main harness)
VB
(Go to next page.)
Switch position Voltage
ON Battery voltage
OFF 1V or less
SAT740J
SAT224J
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
PNP, Overdrive Control, A/T Mode or
Accelerator Position Switches (Cont'd)
AT-1093

VB
CHECK ACCELERATOR POSITION
SWITCH CIRCUIT.
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Select ªTCM INPUT SIGNALSº
in Data Monitor.
3. Read out ªCLOSED THL/SWº
and ªW/O THRL/P-SWº
depressing and releasing accel-
erator pedal.
Check the signal of accelerator
position switch is indicated
properly.
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Check voltage between TCM
terminals
V16,V17and ground
while depressing, and releasing
accelerator pedal slowly. (after
warming up engine)
OK
cNG
Check the following items:
+Accelerator position
switch
Refer to ªCOMPONENT
INSPECTIONº,
AT-1096.
+Harness for short or
open between ignition
switch and accelerator
position switch (Main
harness)
+Harness for short or
open between accelera-
tor position switch and
TCM (Main harness)
Perform ªDIAGNOSTIC PROCEDUREº,
AT-1092.
OK
cNG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
Accelerator
pedal condi-
tionData monitor
CLOSED
THL/SWW/O THRL/
P-SW
Released ON OFF
Fully
depressedOFF ON
Accelerator
pedal condi-
tionVoltage
Terminal
No.
V16Terminal No.
V17
ReleasedBattery volt-
age1V or less
Fully
depressed1V or lessBattery
voltage
SAT739J
SAT226J
.
.
.
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
PNP, Overdrive Control, A/T Mode or
Accelerator Position Switches (Cont'd)
AT-1094