2008 INFINITI QX56 relay

P0615 STARTER RELAYTM-41
< COMPONENT DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
• Refer to TM-39, "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Revision: March 2010 2008 QX56

TM-104
< ECU DIAGNOSIS >
TCM
A/T ASSEMBLY HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR TCM
Data are reference value and are measured between each terminal and ground.
ON OFF SOLLow coast brake engaged. Refer to
TM-9ON
Low coast brake disengaged. Refer to TM-9
OFF
STARTER RELAY Selector lever in “N”,“P” position.
ON
Selector lever in other position. OFF
ACCELE POSI Released accelerator pedal.
0.0/8
Fully depressed accelerator pedal. 8/8
CLSD THL POS Released accelerator pedal.
ON
Fully depressed accelerator pedal. OFF
W/O THL POS Fully depressed accelerator pedal.
ON
Released accelerator pedal. OFF
BRAKE SW Depressed brake pedal.
ON
Released brake pedal. OFF
Item name
Condition Display value (Approx.)
SCIA1658E
Te r m i n a l
No. Wire
color Item
ConditionData (Approx.)
1P Power supply
(Memory back-up)
Always
Battery voltage
2P Power supply
(Memory back-up) Always
Battery voltage
3 L CAN-H ––
4G/W K-line (CONSULT-
III signal) The terminal is connected to the data link connector for CONSULT-III.
–
5 B Ground Always0V
6Y/RPower supply –
Battery voltage
–0 V
7R Back-up lamp re-
lay Selector lever in “R” position.
0V
Selector lever in other positions. Battery voltage
8 P CAN-L ––
9 B/R Starter relay Selector lever in “N”,“ P”
positions. Battery voltage
Selector lever in other positions. 0V
10 B Ground Always0V
Revision: March 2010 2008 QX56

TCM
TM-115
< ECU DIAGNOSIS >
C EF
G H
I
J
K L
M A
B
TM
N
O P
Even when the electronic circuits are normal, under s pecial conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the tire rotation), the transmission can go into fail-safe
mode. If this happens, switch “OFF” the ignition switch for 10 seconds, then switch it “ON” again to return to
the normal shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the
“diagnostics flow” (Refer to TM-5, "
Work Flow").
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, th is function controls the A/T to mark driving possible.
Output Speed Sensor
• Signals are input from two systems - from output s peed sensor installed on the transmission and from com-
bination meter so normal driving is possible even if t here is a malfunction in one of the systems. And if output
speed sensor has unusual cases, 5GR is prohibited.
Accelerator Pedal Position Sensor
• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-
tems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.
Throttle Position Sensor
• If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow sys-
tems, the accelerator opening angle is controlled by the idle signal sent from the ECM which is based on
input indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order to
make driving possible.
Transmission Range Switch
• In the unlikely event that a malfunction signal enters t he TCM, the position indicator is switched “OFF”, the
starter relay is switched “OFF” (starter starting is disabled), the back-up lamp relay switched “OFF” (back-up
lamp is OFF) and the position is fixed to the “D” range to make driving possible.
Starter Relay
• The starter relay is switched “OFF”. (Starter starting is disabled.)
Interlock
• If there is an interlock judgment malfunction, the tr ansmission is fixed in 2GR to make driving possible.
NOTE:
When the vehicle is driven fixed in 2GR, a inpu t speed sensor malfunction is displayed, but this is
not a input speed sensor malfunction.
• When the interlock is detected at the 3GR or more, it is locked at the 2GR.
1st Engine Braking
• When there is an 1st engine brake judgment malfunction, the low coast brake solenoid is switched “OFF” to
avoid the engine brake operation.
Line Pressure Solenoid
• The solenoid is switched “OFF” and the line pressure is set to the maximum hydraulic pressure to make driv- ing possible.
Torque Converter Clutch Solenoid
• The solenoid is switched “OFF” to release the lock-up.
Low Coast Brake Solenoid
• When a (electrical or functional) malfunction occurs, in order to make driving possible, the engine brake is
not applied in 1GR and 2GR.
Input Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4th gear to make driving possible.
Direct Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4GR to make driving possible.
Front Brake Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid “ON”, in order to make driving possible, the
A/T is held in 5GR; if the solenoid is OFF, 4GR.
Revision: March 2010 2008 QX56

TM-116
< ECU DIAGNOSIS >
TCM
High and Low Reverse Clutch Solenoid
• If a (electrical or functional) malfunction occurs with the solenoid either “ON” or “OFF”, the transmission is
held in 4GR to make driving possible.
Input Speed Sensor 1 or 2
• The control is the same as if there were no turbine revolution sensors, 5GR is prohibited.
DTC Inspection Priority ChartINFOID:0000000001604176
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
TM-38, "
Diagnosis Procedure".
DTC No. IndexINFOID:0000000001604177
NOTE:
If DTC U1000 is displayed with other DTC, first pe rform the trouble diagnosis for DTC U1000. Refer to
TM-38, "
Diagnosis Procedure".
Priority Detected items (DTC)
1 U1000 CAN COMM CIRCUIT
2 Except above
DTC
Items
(CONSULT- III screen terms) Reference page
OBD- II
Except OBD- II
CONSULT- III GST (*1) CONSULT- III only
“TRANSMISSION”
— P0615STARTER RELAY TM-39
P0700P0700TRANSMISSION CONT TM-42
P0705P0705T/M RANGE SWITCH A TM-43
P0710P1710TRANS FLUID TEMP SEN TM-71
P0717P0717INPUT SPEED SENSOR A TM-46
P0720P0720OUTPUT SPEED SENSOR TM-49
—P0725ENGINE SPEED TM-51
P0731P07311GR INCORRECT RATIO TM-54
P0732P07322GR INCORRECT RATIO TM-56
P0733P07333GR INCORRECT RATIO TM-58
P0734P07344GR INCORRECT RATIO TM-60
P0735P07355GR INCORRECT RATO TM-62
P0740P0740TORQUE CONVERTER TM-63
P0744 P0744 TORQUE CONVERTER TM-66
P0745P0745PC SOLENOID A TM-67
—P1705TP SENSOR TM-69
—P1721VEHICLE SPEED SIGNAL TM-74
P1730P1730INTERLOCK TM-76
—P17311GR E/BRAKING TM-78
P1752P1752INPUT CLUTCH SOL TM-80
P1757P1757FR BRAKE SOLENOID TM-82
P1762P1762DRCT CLUTCH SOL TM-84
P1767P1767HLR CLUTCH SOLENOID TM-86
Revision: March 2010 2008 QX56

TCM
TM-117
< ECU DIAGNOSIS >
C EF
G H
I
J
K L
M A
B
TM
N
O P
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DTC Alphabetical IndexINFOID:0000000001604178
NOTE:
If DTC U1000 is displayed with other DTC, first pe rform the trouble diagnosis for DTC U1000. Refer to
TM-38, "
Diagnosis Procedure".
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL. P1772
P1772L C BRAKE SOLENOID TM-88
P1774 (2*) P1774 LC BRAKE SOLENOID TM-90
U1000U1000CAN COMM CIRCUIT TM-38
DTC
Items
(CONSULT- III screen terms) Reference page
OBD- II
Except OBD- II
CONSULT- III GST (*1) CONSULT- III only
“TRANSMISSION”
Items
(CONSULT- III screen terms) DTC
Reference page
OBD- II
Except OBD- II
CONSULT- III GST (*1) CONSULT- III only
“TRANSMISSION”
1GR E/BRAKING —P1731TM-78
1GR INCORRECT RATIO P0731P0731TM-54
2GR INCORRECT RATIO P0732P0732TM-56
3GR INCORRECT RATIO P0733P0733TM-58
4GR INCORRECT RATIO P0734P0734TM-60
5GR INCORRECT RATIO P0735P0735TM-62
INTERLOCK P1730P1730TM-76
TORQUE CONVERTER P0744 P0744 TM-66
TRANS FLUID TEMP SEN P0710P1710TM-71
CAN COMM CIRCUIT U1000U1000TM-38
DRCT CLUTCH SOL P1762P1762 TM-84
ENGINE SPEED —P0725TM-51
FR BRAKE SOLENOID P1757P1757TM-82
HLR CLUTCH SOLENOID P1767P1767TM-86
INPUT CLUTCH SOL P1752P1752TM-80
PC SOLENOID A P0745P0745TM-67
L C BRAKE SOLENOID P1772P1772TM-88
L C BRAKE SOLENOID P1774 P1774 TM-90
T/M RANGE SWITCH A P0705P0705TM-43
STARTER RELAY —P0615TM-39
TORQUE CONVERTER P0740P0740TM-63
TRANSMISSION CONT P0700P0700TM-42
TP SENSOR —P1705TM-69
INPUT SPEED SENSOR A P0717P0717TM-46
VEHICLE SPEED SIGNAL —P1721TM-74
OUTPUT SPEED SENSOR P0720P0720TM-49
Revision: March 2010 2008 QX56

WCS-22
< COMPONENT DIAGNOSIS >
KEY SWITCH SIGNAL CIRCUIT
KEY SWITCH SIGNAL CIRCUIT
DescriptionINFOID:0000000001697685
Transmits a key switch signal to the BCM.
Component Function CheckINFOID:0000000001697686
1.CHECK BCM INPUT SIGNAL
Select “DATA MONITOR” for “BCM” and check the “KEY ON SW” monitor value.
>> Inspection End.
Diagnosis ProcedureINFOID:0000000001697687
1.CHECK FUSE
Check if the key switch and ignition knob switch 10A fuse (No. 62, located in the fuse and relay box) is blown.
Is the fuse blown?
YES >> Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2
2.CHECK BCM INPUT SIGNAL
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> Inspection End.
NO >> GO TO 3
3.CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM and key switch and ignition knob switch con- nectors.
2. Check continuity between BCM harness connector M18 (A) and key switch and ignition knob switch harness connector M12 (B).
3. Check continuity between BCM harness connector M18 (A) and ground.KEY ON SW
When key is inserted into key cylinder : ON
When key is removed from key cylinder : OFF
Te r m i n a l s
ConditionVo l ta g e
(Approx.)
(+)
(−)
BCM
connector Te r m i n a l
M18 37 Ground Key is inserted Battery voltage
Key is removed
0
PKIC0721E
AB
Continuity
Connector Terminal Connector Terminal
M183 7M 12 4 Y es
A GroundContinuity
Connector Terminal
M18 37 No
AWNIA0159ZZ
Revision: March 2010 2008 QX56

WW-4
< FUNCTION DIAGNOSIS >
FRONT WIPER AND WASHER SYSTEM
FUNCTION DIAGNOSIS
FRONT WIPER AND WASHER SYSTEM
System DiagramINFOID:0000000001735565
System DescriptionINFOID:0000000001735566
OUTLINE
The front wiper is controlled by each function of BCM and IPDM E/R.
Control by BCM
• Combination switch reading function
• Front wiper control function
Control by IPDM E/R
• Front wiper control function
• Relay control function
FRONT WIPER BASIC OPERATION
• BCM detects the combination switch conditi on by the combination switch reading function.
• BCM transmits the front wiper request signal to IPDM E/R with CAN communication depending on each
operating condition of the front wiper.
• IPDM E/R turns ON/OFF the integrated front wiper rela y and the front wiper high relay according to the front
wiper request signal. IPDM E/R provides the power supply to operate the front wiper HI/LO operation.
FRONT WIPER LO OPERATION
• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the
front wiper LO operating condition.
Front wiper LO operating condition
- Ignition switch ON
- Front wiper switch LO or front wiper switch MIST (while pressing)
• IPDM E/R turns ON the integrated front wiper rela y according to the front wiper request signal (LO).
FRONT WIPER HI OPERATION
• BCM transmits the front wiper request signal (HI) to IPDM E/R with CAN communication according to the
front wiper HI operating condition.
Front wiper HI operating condition
- Ignition switch ON
- Front wiper switch HI
• IPDM E/R turns ON the integrated front wiper relay and the front wiper high relay according to the front wiper request signal (HI).
FRONT WIPER INT OPERATION (L INKED WITH VEHICLE SPEED)
ALLIA0427GB
Revision: March 2010 2008 QX56

FRONT WIPER AND WASHER SYSTEMWW-5
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
• BCM transmits the front wiper request signal (INT) to IPDM E/R with CAN communication according to the
front wiper INT operation condition and the intermittent operation delay interval judged value.
Front wiper INT operating condition- Ignition switch ON
- Front wiper switch INT
Intermittent operation delay interval judgment- BCM calculates the intermittent operation delay inte rval from the vehicle speed signal received from the
wiper dial position and the combination meter with CAN communication.
• IPDM E/R turns the integrated front wiper relay ON so that the front wiper is operated only once according to the front wiper request signal (INT).
• BCM detects stop position/except st op position of the front wiper motor according to the front wiper stop
position signal received from IP DM E/R with CAN communication.
• BCM transmits the front wiper request signal (INT) again after the intermittent operation delay interval after the front wiper motor is stopped.
FRONT WIPER AUTO STOP OPERATION
• BCM stops transmitting the front wiper request si gnal when the front wiper switch is turned OFF.
• IPDM E/R detects the front wiper auto stop signal fr om the front wiper motor and detects the front wiper
motor position (stop positi on/except stop position).
Wiper intermittent dial posi-
tion Intermittent
operation interval Intermittent operation delay Interval (s)
Vehicle speed
Vehicle stopped or less than 5 km/h (3.1 MPH) 5 km/h (3.1 MPH)
or more or less
than 35 km/h (21.7 MPH) 35 km/h (21.7
MPH) or more or
less than 65 km/h (40.4 MPH) 65 km/h (40.4
MPH) or more
1S hort
↑
↓
Long 0.8
0.60.40.24
2 4321 .2
31 07.5 5 3
41 612 84.8
5 241 8127.2
6 322 4169.6
7 423 1.52 11 2.6
JPLIA0094GB
Revision: March 2010 2008 QX56