Infiniti QX4 (R50). Manual — part 10
SAT964I
Malfunction Indicator Lamp (MIL)
=NBAT0183
The MIL is located on the instrument panel.
1.
The MIL will light up when the ignition switch is turned ON
without the engine running. This is a bulb check.
I
If the MIL does not light up, refer to EL-114, “Schematic”.
(Or refer to EC-648, “Wiring Diagram”.)
2.
When the engine is started, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction. For detail, refer to
EC-59, “Introduction”.
CONSULT-II
NBAT0184
After performing “SELF-DIAGNOSTIC PROCEDURE (WITH CON-
SULT-II)” (AT-37), place check marks for results on the “DIAGNOS-
TIC WORKSHEET”, AT-55. Reference pages are provided follow-
ing the items.
NOTICE:
1)
The CONSULT-II electrically displays shift timing and lock-up
timing (that is, operation timing of each solenoid).
Check for time difference between actual shift timing and the
CONSULT-II display. If the difference is noticeable, mechani-
cal parts (except solenoids, sensors, etc.) may be malfunction-
ing. Check mechanical parts using applicable diagnostic pro-
cedures.
2)
Shift schedule (which implies gear position) displayed on
CONSULT-II and that indicated in Service Manual may differ
slightly. This occurs because of the following reasons:
I
Actual shift schedule has more or less tolerance or allowance,
I
Shift schedule indicated in Service Manual refers to the point
where shifts start, and
I
Gear position displayed on CONSULT-II indicates the point
where shifts are completed.
3)
Shift solenoid valve “A” or “B” is displayed on CONSULT-II at
the start of shifting. Gear position is displayed upon completion
of shifting (which is computed by TCM).
4)
Additional CONSULT-II information can be found in the Opera-
tion Manual supplied with the CONSULT-II unit.
SAT014K
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)
NBAT0184S01
1.
Turn on CONSULT-II and touch “ENGINE” for OBD-II detected
items or touch “A/T” for TCM self-diagnosis.
If A/T is not displayed, check TCM power supply and ground
circuit. Refer to AT-92. If result is NG, refer to EL-9, “Sche-
matic”.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
Malfunction Indicator Lamp (MIL)
AT-37
SAT987J
2.
Touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing
operation.
CONSULT-II performs REAL-TIME SELF-DIAGNOSIS.
Also, any malfunction detected while in this mode will be dis-
played at real time.
SELF-DIAGNOSTIC RESULT TEST MODE
NBAT0184S02
Detected items
(Screen terms for CONSULT-II, “SELF-DIAG
RESULTS” test mode)
Malfunction is detected when ...
TCM self-diagnosis
OBD-II (DTC)
Available by
O/D OFF
indicator lamp or
“A/T” on CONSULT-II
Available by
malfunction
indicator lamp*2,
“ENGINE” on CON-
SULT-II or GST
“A/T”
“ENGINE”
PNP switch circuit
I
TCM does not receive the cor-
rect voltage signal (based on
the gear position) from the
switch.
—
P0705
—
PNP SW/CIRC
Revolution sensor
I
TCM does not receive the
proper voltage signal from the
sensor.
X
P0720
VHCL SPEED
SEN·A/T
VEH SPD SEN/CIR
AT
Vehicle speed sensor (Meter)
I
TCM does not receive the
proper voltage signal from the
sensor.
X
—
VHCL SPEED
SEN·MTR
—
A/T 1st gear function
I
A/T cannot be shifted to the 1st
gear position even if electrical
circuit is good.
—
P0731*1
—
A/T 1ST GR FNCTN
A/T 2nd gear function
I
A/T cannot be shifted to the 2nd
gear position even if electrical
circuit is good.
—
P0732*1
—
A/T 2ND GR FNCTN
A/T 3rd gear function
I
A/T cannot be shifted to the 3rd
gear position even if electrical
circuit is good.
—
P0733*1
—
A/T 3RD GR FNCTN
A/T 4th gear function
I
A/T cannot be shifted to the 4th
gear position even if electrical
circuit is good.
—
P0734*1
—
A/T 4TH GR FNCTN
A/T TCC S/V function (lock-up)
I
A/T cannot perform lock-up
even if electrical circuit is good.
—
P0744*1
—
A/T TCC S/V FNCTN
Shift solenoid valve A
I
TCM detects an improper volt-
age drop when it tries to operate
the solenoid valve.
X
P0750
SHIFT SOLENOID/V
A
SFT SOL A/CIRC
Shift solenoid valve B
I
TCM detects an improper volt-
age drop when it tries to operate
the solenoid valve.
X
P0755
SHIFT SOLENOID/V
B
SFT SOL B/CIRC
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont’d)
AT-38
Detected items
(Screen terms for CONSULT-II, “SELF-DIAG
RESULTS” test mode)
Malfunction is detected when ...
TCM self-diagnosis
OBD-II (DTC)
Available by
O/D OFF
indicator lamp or
“A/T” on CONSULT-II
Available by
malfunction
indicator lamp*2,
“ENGINE” on CON-
SULT-II or GST
“A/T”
“ENGINE”
Overrun clutch solenoid valve
I
TCM detects an improper volt-
age drop when it tries to operate
the solenoid valve.
X
P1760
OVERRUN CLUTCH
S/V
O/R CLUCH SOL/
CIRC
T/C clutch solenoid valve
I
TCM detects an improper volt-
age drop when it tries to operate
the solenoid valve.
X
P0740
T/C CLUTCH SOL/V
TCC SOLENOID/
CIRC
Line pressure solenoid valve
I
TCM detects an improper volt-
age drop when it tries to operate
the solenoid valve.
X
P0745
LINE PRESSURE
S/V
L/PRESS SOL/CIRC
Throttle position sensor
Throttle position switch
I
TCM receives an excessively
low or high voltage from the
sensor.
X
P1705
THROTTLE POSI
SEN
TP SEN/CIRC A/T
Engine speed signal
I
TCM does not receive the
proper voltage signal from the
ECM.
X
P0725
ENGINE SPEED SIG
A/T fluid temperature sensor
I
TCM receives an excessively
low or high voltage from the
sensor.
X
P0710
BATT/FLUID TEMP
SEN
ATF TEMP SEN/
CIRC
Engine control
I
The ECM-AT communication
line is open or shorted.
X
A/T COMM LINE
—
Turbine revolution sensor
I
TCM does not receive the
proper voltage signal from the
sensor.
X
—
TURBINE REV
—
TCM (RAM)
I
TCM memory (RAM) is malfunc-
tioning.
—
—
CONTROL UNIT
(RAM)
—
TCM (ROM)
I
TCM memory (ROM) is malfunc-
tioning.
—
—
CONTROL UNIT
(ROM)
—
TCM (EEP ROM)
I
TCM memory (EEP ROM) is
malfunctioning.
—
—
CONTROL UNIT
(EEP ROM)
—
Initial start
I
This is not a malfunction mes-
sage (Whenever shutting off a
power supply to the TCM, this
message appears on the
screen.)
X
—
INITIAL START
—
No failure
(NO DTC IS DETECTED FURTHER TEST-
ING MAY BE REQUIRED)
I
No failure has been detected.
X
X
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont’d)
AT-39
X: Applicable
—: Not applicable
*1: These malfunctions cannot be displayed by MIL
if another malfunction is assigned to MIL.
*2: Refer to EC-74, “DESCRIPTION”.
DATA MONITOR MODE (A/T)
NBAT0184S03
Item
Display
Monitor item
Description
Remarks
TCM input
signals
Main sig-
nals
Vehicle speed sensor 1
(A/T)
(Revolution sensor)
VHCL/S SE·A/T
[km/h] or [mph]
X
—
I
Vehicle speed computed
from signal of revolution
sensor is displayed.
When racing engine in “N”
or “P” position with vehicle
stationary, CONSULT-II
data may not indicate 0
km/h (0 mph).
Vehicle speed sensor 2
(Meter)
VHCL/S SE·MTR
[km/h] or [mph]
X
—
I
Vehicle speed computed
from signal of vehicle
speed sensor is dis-
played.
Vehicle speed display may
not be accurate under
approx. 10 km/h (6 mph). It
may not indicate 0 km/h (0
mph) when vehicle is sta-
tionary.
Throttle position sensor
THRTL POS
SEN
[V]
X
—
I
Throttle position sensor
signal voltage is dis-
played.
A/T fluid temperature sen-
sor
FLUID TEMP SE
[V]
X
—
I
A/T fluid temperature
sensor signal voltage is
displayed.
I
Signal voltage lowers as
fluid temperature rises.
Battery voltage
BATTERY VOLT
[V]
X
—
I
Source voltage of TCM
is displayed.
Engine speed
ENGINE SPEED
[rpm]
X
X
I
Engine speed, computed
from engine speed
signal, is displayed.
Engine speed display may
not be accurate under
approx. 800 rpm. It may
not indicate 0 rpm even
when engine is not run-
ning.
Turbine revolution sensor
TURBINE REV
[rpm]
X
—
I
Turbine revolution com-
puted from signal of tur-
bine revolution sensor is
displayed.
Error may occur under
approx. 800 rpm and will
not indicate 0 rpm even if
engine is not running.
Overdrive control switch
OVERDRIVE SW
[ON/OFF]
X
—
I
ON/OFF state computed
from signal of overdrive
control SW is displayed.
PN position switch
PN POSI SW
[ON/OFF]
X
—
I
ON/OFF state computed
from signal of PN posi-
tion SW is displayed.
R position switch
R POSITION SW
[ON/OFF]
X
—
I
ON/OFF state computed
from signal of R position
SW is displayed.
D position switch
D POSITION SW
[ON/OFF]
X
—
I
ON/OFF state computed
from signal of D position
SW is displayed.
2 position switch
2 POSITION SW
[ON/OFF]
X
—
I
ON/OFF status, com-
puted from signal of 2
position SW, is dis-
played.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont’d)
AT-40
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