Nissan Frontier D22. Manual — part 58
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-201
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
JUDGEMENT OF SELF-DIAGNOSIS CODE (VG33E ONLY)
O/D OFF indicator lamp:
All judgement flickers are same.
All circuits that can be confirmed by self-diagnosis are OK.
1st judgement flicker is longer than others.
Revolution sensor circuit is short-circuited or disconnected.
Þ Go to
AT-261, "DTC P0720 VEHICLE SPEED SENSOR·A/T
2nd judgement flicker is longer than others.
Vehicle speed sensor circuit is short-circuited or disconnected.
Þ Go to
AT-340, "DTC VEHICLE SPEED SENSOR·MTR"
3rd judgement flicker is longer than others.
Throttle position sensor circuit is short-circuited or disconnected.
Þ Go to
AT-321, "DTC P1705 THROTTLE POSITION SEN-
.
4th judgement flicker is longer than others.
Shift solenoid valve A circuit is short-circuited or disconnected.
Þ Go to
AT-311, "DTC P0750 SHIFT SOLENOID VALVE A"
5th judgement flicker is longer than others.
Shift solenoid valve B circuit is short-circuited or disconnected.
Þ Go to
AT-316, "DTC P0755 SHIFT SOLENOID VALVE B"
.
6th judgement flicker is longer than others.
Overrun clutch solenoid valve circuit is short-circuited or discon-
nected.
Þ Go to
AT-329, "DTC P1760 OVERRUN CLUTCH SOLENOID
7th judgement flicker is longer than others.
Torque converter clutch solenoid valve circuit is short-circuited or
disconnected.
Þ Go to
AT-293, "DTC P0740 TORQUE CONVERTER CLUTCH
.
8th judgement flicker is longer than others.
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
Þ Go to
AT-334, "DTC BATT/FLUID TEMP SEN (A/T FLUID
TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)"
9th judgement flicker is longer than others.
Engine speed signal circuit is short-circuited or disconnected.
Þ Go to
AT-266, "DTC P0725 ENGINE SPEED SIGNAL"
.
SAT436F
SAT437F
SAT439F
SAT441F
SAT443F
SAT445F
SAT447F
SAT449F
SAT451F
SAT453F
AT-202
[RE4R01A]
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
t
1
= 2.5 seconds
t
2
= 2.0 seconds
t
3
= 1.0 second
t
4
= 1.0 second
JUDGEMENT OF SELF-DIAGNOSIS CODE (VG33ER ONLY)
10th judgement flicker is longer than others.
Line pressure solenoid valve circuit is short-circuited or discon-
nected.
Þ Go to
AT-306, "DTC P0745 LINE PRESSURE SOLENOID
Flickers as shown below.
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a problem.)
Lamp comes on.
PNP switch, overdrive control switch or throttle position switch cir-
cuit is disconnected or TCM is damaged.
Þ Go to
AT-387, "21. TCM Self-diagnosis Does Not Activate
(PNP, Overdrive Control and Throttle Position Switches Cir-
cuit Checks)"
.
O/D OFF indicator lamp:
SAT455F
SAT457F
SAT367J
O/D OFF indicator lamp:
All judgement flickers are same.
All circuits that can be confirmed by self-diagnosis are OK.
1st judgement flicker is longer than others.
Revolution sensor circuit is short-circuited or disconnected.
Þ Go to
AT-261, "DTC P0720 VEHICLE SPEED SENSOR·A/T
2nd judgement flicker is longer than others.
Vehicle speed sensor circuit is short-circuited or disconnected.
Þ Go to
AT-340, "DTC VEHICLE SPEED SENSOR·MTR"
3rd judgement flicker is longer than others.
Throttle position sensor circuit is short-circuited or disconnected.
Þ Go to
AT-321, "DTC P1705 THROTTLE POSITION SEN-
LAT425
LAT426
LAT427
LAT428
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-203
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
t
1
= 2.5 seconds
t
2
= 2.0 seconds
t
3
= 1.0 second
t
4
= 1.0 second
4th judgement flicker is longer than others.
Shift solenoid valve A circuit is short-circuited or disconnected.
Þ Go to
AT-311, "DTC P0750 SHIFT SOLENOID VALVE A"
.
5th judgement flicker is longer than others.
Shift solenoid valve B circuit is short-circuited or disconnected.
Þ Go to
AT-316, "DTC P0755 SHIFT SOLENOID VALVE B"
.
6th judgement flicker is longer than others.
Overrun clutch solenoid valve circuit is short-circuited or discon-
nected.
Þ Go to
AT-329, "DTC P1760 OVERRUN CLUTCH SOLENOID
7th judgement flicker is longer than others.
Torque converter clutch solenoid valve circuit is short-circuited or
disconnected.
Þ Go to
AT-293, "DTC P0740 TORQUE CONVERTER CLUTCH
.
8th judgement flicker is longer than others.
A/T fluid temperature sensor is disconnected or TCM power
source circuit is damaged.
Þ Go to
AT-334, "DTC BATT/FLUID TEMP SEN (A/T FLUID
TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)"
9th judgement flicker is longer than others.
Engine speed signal circuit is short-circuited or disconnected.
Þ Go to
AT-266, "DTC P0725 ENGINE SPEED SIGNAL"
.
10th judgement flicker is longer than others.
Þ Go to
AT-344, "DTC TURBINE REVOLUTION SENSOR
.
11th judgement flicker is longer than others.
Line pressure solenoid valve circuit is short-circuited or discon-
nected.
Þ Go to
AT-306, "DTC P0745 LINE PRESSURE SOLENOID
Flickers as shown below.
Battery power is low.
Battery has been disconnected for a long time.
Battery is connected conversely.
(When reconnecting TCM connectors. — This is not a problem.)
Lamp comes on.
PNP switch, overdrive control switch or throttle position switch cir-
cuit is disconnected or TCM is damaged.
Þ Go to
AT-387, "21. TCM Self-diagnosis Does Not Activate
(PNP, Overdrive Control and Throttle Position Switches Cir-
cuit Checks)"
.
O/D OFF indicator lamp:
LAT429
LAT430
LAT431
LAT432
LAT433
LAT434
LAT435
SAT455F
SAT457F
SAT367J
AT-204
[RE4R01A]
TROUBLE DIAGNOSIS — INTRODUCTION
TROUBLE DIAGNOSIS — INTRODUCTION
PFP:00000
Introduction
ECS007LU
The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or PNP switch and provides shift control or lock-up
control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the OBD-related parts of the
A/T system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the problems. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the “Work Flow”. Refer to
.
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such problems, especially
intermittent ones. Find out what symptoms are present and under what conditions they occur. A “Diagnostic
Worksheet” should be used. Refer to
AT-205, "DIAGNOSTIC WORKSHEET"
Start your diagnosis by looking for “conventional” problems first. This
will help troubleshoot driveability problems on an electronically con-
trolled engine vehicle.
Also check related Service bulletins.
AAT473A
SAT632I
SEF234G
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