ignition NISSAN PATROL 2000 Electronic User Guide

Terminal
No.Wire color Item ConditionJudgement
standard (Approx.)
20 L/BOverrun clutch
solenoid valve
When overrun clutch solenoid
valve operates.Battery voltage
When overrun clutch solenoid
valve does not operate.0V
21 Ð Ð
ÐÐ
22 GYOverdrive control
switchWhen setting overdrive control
switch in ªONº positionBattery voltage
When setting overdrive control
switch in ªOFFº position0V
23 Ð Ð Ð Ð
24 Ð Ð Ð Ð Ð
25 B Ground
ÐÐ
26 GPNP ª1º position
switchWhen setting selector lever to ª1º
position.Battery voltage
When setting selector lever to
other positions.0V
27 G/WPNP ª2º position
switchWhen setting selector lever to ª2º
position.Battery voltage
When setting selector lever to
other positions.0V
28 R/YPower source
(Back-up)
or
When turning ignition switch to
ªOFFº.Battery voltage
When turning ignition switch to
ªONº.Battery voltage
29 WRevolution sensor
(Measure in AC
range)
When vehicle cruises at 30 km/h
(19 MPH).1V or more
Voltage rises gradu-
ally in response to
vehicle speed.
When vehicle parks. 0V
30*1 Y/G (RX)
ÐÐ
31*1 Y/R (TX) Ð Ð
32 G/RAccelerator posi-
tion sensor
(Power source)Turn ignition switch to ªONº. 4.5 - 5.5V
33 Ð Ð Turn ignition switch to ªOFFº. 0V
*1: These terminals are connected to the data link connector.
TROUBLE DIAGNOSIS Ð General Description
TCM Terminals and Reference Value (Cont'd)
AT-1062

DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (self-
diagnostic results) for engine control.
Refer to EC section [ªMalfunction Indica-
tor (MI)º, ªON BOARD DIAGNOSTIC
SYSTEM DESCRIPTIONº].
OK
cNG
Check accelerator position
sensor circuit for engine
control. Refer to EC sec-
tion [ªTROUBLE DIAGNO-
SIS FOR ªTHRTL
(ACCEL) POSI SENº
(DTC 43)].
CHECK INPUT SIGNAL.
1. Turn ignition switch to ªONº
position.
(Do not start engine.)
2. Select ªTCM INPUT SIGNALSº
in Data Monitor.
3. Read out the value of ªTHRTL
POS SENº.
Voltage:
Fully-closed throttle:
Approximately 0.5V
Fully-open throttle:
Approximately 4V
------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªONº
position. (Do not start engine.)
2. Check voltage between TCM
terminals
V41andV42while
accelerator pedal is depressed
slowly.
Voltage:
Fully-closed throttle valve:
Approximately 0.5 - 0.7V
Fully-open throttle valve:
Approximately 4V
(Voltage rises gradually in
response to throttle position)
OK
cNG
Check harness for short or
open between ECM and
TCM regarding accelerator
position sensor circuit.
(Main harness)
CHECK ACCELERATOR POSITION
SWITCH.
Refer to ªCHECK ACCELERATOR POSI-
TION SWITCHº, AT-1091.
OK
cNG
Repair or replace dam-
aged parts.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1068.
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
SAT738J
SAT239J
.
.
.
.
TROUBLE DIAGNOSIS FOR THROTTLE POSI SEN
Accelerator Position Sensor (Cont'd)
AT-1069

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 terminal
V3
and ground.
Resistance: 20 - 40W
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Shift solenoid valve A
Refer to ªCOMPONENT
INSPECTIONº below.
+Harness 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 terminal
V3
and TCM harness connector terminal
V11.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
cNG
Repair open circuit or
short to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1070.
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
COMPONENT INSPECTION
Shift solenoid valve A
+For removal, refer to AT-1124.
Resistance check
+Check resistance between terminal
V3and ground.
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve A
V3Ground 20 - 40W
Operation check
+Check solenoid valve by listening for its operating sound
while applying battery voltage to the terminal
V3and ground.
SAT240J
SAT241J
SAT537IA
SAT536IA
.
.
.
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V A
Shift Solenoid Valve A (Cont'd)
AT-1071

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 terminal
V2
and ground.
Resistance: 20 - 40W
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Shift solenoid valve B
Refer to ªCOMPONENT
INSPECTIONº below.
+Harness 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 terminal
V2
and TCM harness connector terminal
V12.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
cNG
Repair open circuit or
short to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1072.
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
COMPONENT INSPECTION
Shift solenoid valve B
+For removal, refer to AT-1124.
Resistance check
+Check resistance between terminal
V2and ground.
Solenoid valve Terminal No.Resistance
(Approx.)
Shift solenoid
valve B
V2Ground 20 - 40W
Operation check
+Check solenoid valve by listening for its operating sound
while applying battery voltage to the terminal
V2and ground.
SAT242J
SAT243J
SAT535IA
SAT534IA
.
.
.
TROUBLE DIAGNOSIS FOR SHIFT SOLENOID/V B
Shift Solenoid Valve B (Cont'd)
AT-1073

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 terminal
V4
and ground.
Resistance: 20 - 40W
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Overrun clutch solenoid
valve
Refer to ªCOMPONENT
INSPECTIONº below.
+Harness 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 terminal
V4
and TCM harness connector terminal
V20.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
cNG
Repair open circuit or
short to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1074.
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
COMPONENT INSPECTION
Overrun clutch solenoid valve
+For removal, refer to AT-1124.
Resistance check
+Check resistance between terminal
V4and ground.
Solenoid valve Terminal No.Resistance
(Approx.)
Overrun clutch
solenoid valve
V4Ground 20 - 40W
Operation check
+Check solenoid valve by listening for its operating sound
while applying battery voltage to the terminal
V4and ground.
SAT244J
SAT245J
SAT392JC
SAT567IB
.
.
.
TROUBLE DIAGNOSIS FOR OVERRUN CLUTCH S/V
Overrun Clutch Solenoid Valve (Cont'd)
AT-1075

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 terminal
V7
and ground.
Resistance: 10 - 20W
OK
cNG
1. Remove oil pan. Refer
to AT-1124.
2. Check the following
items:
+Torque converter clutch
solenoid valve
Refer to ªCOMPONENT
INSPECTIONº on next
page.
+Harness 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 terminal
V7
and TCM harness connector terminal
V3.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
cNG
Repair open circuit or
short to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1076.
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
SAT246J
SAT247J
.
.
.
TROUBLE DIAGNOSIS FOR T/C CLUTCH SOL/V
Torque Converter Clutch Solenoid Valve
(Cont'd)
AT-1077

DIAGNOSTIC PROCEDURE
CHECK TCM POWER SOURCE.
1. Turn ignition switch to ªONº position.
(Do not start engine.)
2. Check voltage between TCM terminals
V10,V19and ground.
Battery voltage should exist.
OK
cNG
Check the following items:
+Harness for short or
open between ignition
switch and TCM (Main
harness)
+Ignition 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 terminals
V8andV9when A/T is cold.
Resistance:
Cold [20ÉC (68ÉF)]
Approximately 2.5 kW
4. Reinstall any part removed.
OK
cNG
1. Remove oil pan.
2. Check the following
items:
+A/T fluid temperature
sensor
Refer to ªCOMPONENT
INSPECTIONº on next
page.
+Harness of terminal cord
assembly for short or
open
VA
(Go to next page.)
SAT248J
SAT249J
.
.
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor and TCM
Power Source (Cont'd)
AT-1080

DIAGNOSTIC PROCEDURE
Perform diagnostic test mode II (self-
diagnostic results) for engine control.
Check ignition signal circuit condition.
OK
cNG
Check ignition signal cir-
cuit for engine control.
Refer to EC section
[TROUBLE DIAGNOSIS
FOR ªIGN SIGNAL-PRI-
MARYº (DTC 21)].
CHECK INPUT SIGNAL.
1. Start engine.
2. Select ªTCM 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
terminal
V39and ground.
Voltage:
Refer to EC section.
OK
cNG
Check the following items:
+Harness for short or
open between TCM and
ECM
+Resistor
+Ignition coil
Refer to EC section
[TROUBLE DIAGNOSIS
FOR ªIGN SIGNAL-PRI-
MARYº (DTC 21)].
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1082.
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
SAT740J
SAT253J
.
.
.
TROUBLE DIAGNOSIS FOR ENGINE SPEED SIG
Engine Speed Signal (Cont'd)
AT-1083

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 terminal
V6
and ground.
Resistance: 2.5 - 5W
OK
cNG
1. Remove control valve
assembly. Refer to
AT-1124.
2. Check the following
items:
+Line pressure sole-
noid valve
Refer to ªCOMPO-
NENT INSPECTIONº
on next page.
+Harness 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 terminal
V6
and TCM harness connector terminal
V2.
Resistance: 11.2 - 12.8W
OK
cNG
Check the following items:
+Dropping resistor
Refer to ªCOMPONENT
INSPECTIONº on next
page.
+Harness for short or
open between TCM ter-
minal
V2and terminal
cord assembly (Main
harness)
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to ªOFFº position.
2. Check resistance between terminal
V6
and TCM harness connector terminal
V1.
Resistance:
Approximately 0W
If OK, check harness for short to
ground and short to power.
3. Reinstall any part removed.
OK
cNG
Repair open circuit or
short to ground or short to
power in harness or con-
nector.
Perform ªSELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDUREº, AT-1084.
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
SAT254J
SAT255J
.
.
.
.
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve (Cont'd)
AT-1085

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