2007 INFINITI QX56 Factory Service Manual

clock deactivate passenger airbag alternator fuel tank capacity technical data radiator

Page 225 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1845 ATF PRESSURE SWITCH 5
AT-155
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
1. Start engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for �

Page 226 of 3061

INFINITI QX56 2007 Factory Service Manual AT-156
< SERVICE INFORMATION >
DTC P1846 ATF PRESSURE SWITCH 6
DTC P1846 ATF PRESSURE SWITCH 6
DescriptionINFOID:0000000003532432
Fail-safe function to detect high and low reverse clutch solenoid valv

AT-156
< SERVICE INFORMATION >
DTC P1846 ATF PRESSURE SWITCH 6
DTC P1846 ATF PRESSURE SWITCH 6
DescriptionINFOID:0000000003532432
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532433
On Board Diagnosis LogicINFOID:0000000003532434
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1846 ATF PRES SW 6/CIRC” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6 is
irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseINFOID:0000000003532435
• ATF pressure switch 6
• Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000003532436
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd ⇒ 3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to AT-156, "
Diagnosis Procedure".
If DTC (P1767) is detected, go toAT-142, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003532437
1.CHECK INPUT SIGNAL
With CONSULT-II
Item name Condition Display value
ATF PRES SW 6High and low reverse clutch engaged. Refer to AT- 2 0
.ON
High and low reverse clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0031E

Page 227 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1846 ATF PRESSURE SWITCH 6
AT-157
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
1. Start the engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode f

Page 228 of 3061

INFINITI QX56 2007 Factory Service Manual AT-158
< SERVICE INFORMATION >
MAIN POWER SUPPLY AND GROUND CIRCUIT
MAIN POWER SUPPLY AND GROUND CIRCUIT
Wiring Diagram - AT - MAININFOID:0000000003532438
TCM Input/Output Signal Reference Values
Refe

Page 229 of 3061

INFINITI QX56 2007 Factory Service Manual MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-159
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
Diagnosis ProcedureINFOID:0000000003532439
1.CHECK TCM POWER SOURCE STEP 1
1. Turn ignition switch O

Page 230 of 3061

INFINITI QX56 2007 Factory Service Manual AT-160
< SERVICE INFORMATION >
MAIN POWER SUPPLY AND GROUND CIRCUIT
Check the following items:
• The A/T assembly harness connector terminals for damage or loose connection with harness connector.
O

Page 231 of 3061

INFINITI QX56 2007 Factory Service Manual CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION CIR-
CUIT
AT-161
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION
CIRCUIT
CONSU

Page 232 of 3061

INFINITI QX56 2007 Factory Service Manual AT-162
< SERVICE INFORMATION >
BRAKE SIGNAL CIRCUIT
BRAKE SIGNAL CIRCUIT
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003532442
Diagnosis ProcedureINFOID:0000000003532443
1.CHECK CAN C

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