Infiniti QX56 (JA60). Manual — part 925
TM-2
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0725 ENGINE SPEED . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0731 1GR INCORRECT RATIO . . . . . ..
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0732 2GR INCORRECT RATIO . . . . . ..
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0733 3GR INCORRECT RATIO . . . . . ..
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0734 4GR INCORRECT RATIO . . . . . ..
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0735 5GR INCORRECT RATIO . . . . . ..
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0740 TORQUE CONVERTER . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ..
P0744 TORQUE CONVERTER . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P0745 PRESSURE CONTROL SOLENOID A ...
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1705 TP SENSOR . . . . . . . . . . ...
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1710 TRANSMISSION FLUID TEMPERA-
TURE SENSOR . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
Component Inspection . . . . . . . . . . .
P1721 VEHICLE SPEED SIGNAL . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1730 INTERLOCK . . . . . . . . . . ...
Description . . . . . . . . . . . . . . . ..
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Judgment of Interlock . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1731 1ST ENGINE BRAKING . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
TM-3
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Diagnosis Procedure . . . . . . . . . . . ...
P1752 INPUT CLUTCH SOLENOID . . . . ..
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1757 FRONT BRAKE SOLENOID . . . . ...
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1762 DIRECT CLUTCH SOLENOID . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1767 HIGH AND LOW REVERSE CLUTCH
SOLENOID . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1772 LOW COAST BRAKE SOLENOID . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
P1774 LOW COAST BRAKE SOLENOID . . .
Description . . . . . . . . . . . . . . . ..
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . ..
Possible Cause . . . . . . . . . . . . . ...
DTC Confirmation Procedure . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
MAIN POWER SUPPLY AND GROUND CIR-
CUIT . . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
CLOSED THROTTLE POSITION AND WIDE
OPEN THROTTLE POSITION CIRCUIT . . ...
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
BRAKE SIGNAL CIRCUIT . . . . . . . .
CONSULT-III Reference Value in Data Monitor
Mode . . . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
TOW MODE SWITCH . . . . . . . . . ...
Description . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ...
A/T SHIFT LOCK SYSTEM . . . . . . . ...
Description . . . . . . . . . . . . . . . ...
Terminals And Reference Values . . . . . . .
Wiring Diagram - A/T SHIFT LOCK SYSTEM - . .
Component Inspection . . . . . . . . . . ...
ECU DIAGNOSIS . . . . . . . . . ...
TCM . . . . . . . . . . . . . . . . .
Reference Value . . . . . . . . . . . . .
Wiring Diagram — A/T CONTROL SYSTEM — .
Fail-Safe . . . . . . . . . . . . . . . .
DTC Inspection Priority Chart . . . . . . . .
DTC No. Index . . . . . . . . . . . . . ...
DTC Alphabetical Index . . . . . . . . . . .
SYMPTOM DIAGNOSIS . . . . . . .
SYSTEM SYMPTOM . . . . . . . . . ...
Symptom Table . . . . . . . . . . . . . .
PRECAUTION . . . . . . . . . . .
PRECAUTIONS . . . . . . . . . . . ...
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine . . . . . . . . . . . . ..
Precaution . . . . . . . . . . . . . . . .
Service Notice or Precaution . . . . . . . . .
PREPARATION . . . . . . . . . . .
PREPARATION . . . . . . . . . . . ...
Special Service Tool . . . . . . . . . . . ..
Commercial Service Tool . . . . . . . . . ..
ON-VEHICLE MAINTENANCE . . . . ..
A/T FLUID . . . . . . . . . . . . . ...
Checking the A/T Fluid (ATF) . . . . . . . .
Changing the A/T Fluid (ATF) . . . . . . . .
A/T FLUID COOLER . . . . . . . . . ...
A/T Fluid Cooler Cleaning . . . . . . . . . .
TM-4
STALL TEST . . . . . . . . . . . . .
Inspection and Judgment . . . . . . . . . ..
LINE PRESSURE TEST . . . . . . . . ..
Inspection and Judgment . . . . . . . . . ..
ROAD TEST . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
Check Before Engine Is Started . . . . . . .
Check At Idle . . . . . . . . . . . . . . .
Cruise Test - Part 1 . . . . . . . . . . . ...
Cruise Test - Part 2 . . . . . . . . . . . ...
Cruise Test - Part 3 . . . . . . . . . . . ...
Vehicle Speed When Shifting Gears . . . . . .
Vehicle Speed When Performing and Releasing
Complete Lock-up . . . . . . . . . . . . .
A/T POSITION . . . . . . . . . . . . .
Adjustment of A/T Position . . . . . . . . .
Checking of A/T Position . . . . . . . . . ...
ON-VEHICLE REPAIR . . . . . . . ...
SHIFT CONTROL SYSTEM . . . . . . .
A/T Shift Selector Removal and Installation . . ..
AIR BREATHER HOSE . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
OIL PAN . . . . . . . . . . . . . . ...
Oil Pan . . . . . . . . . . . . . . . . ...
CONTROL VALVE WITH TCM . . . . . .
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 and Plug . . . . . . . . . . ..
REAR OIL SEAL . . . . . . . . . . . ..
Rear Oil Seal . . . . . . . . . . . . . . .
FLUID COOLER SYSTEM . . . . . . . ...
Exploded View . . . . . . . . . . . . . ...
Removal and Installation . . . . . . . . . ...
REMOVAL AND INSTALLATION . . . ..
TRANSMISSION ASSEMBLY . . . . . . .
Removal and Installation (2WD) . . . . . . ...
Removal and Installation (4WD) . . . . . . ...
DISASSEMBLY AND ASSEMBLY . . ...
OVERHAUL . . . . . . . . . . . . . ..
Component . . . . . . . . . . . . . . ...
Oil Channel . . . . . . . . . . . . . . ...
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings . . . . . . ..
DISASSEMBLY . . . . . . . . . . . .
Disassembly . . . . . . . . . . . . . . ..
REPAIR FOR COMPONENT PARTS . . . ..
Oil Pump . . . . . . . . . . . . . . . ...
Front Sun Gear, 3rd One-Way Clutch . . . . ...
Front Carrier, Input Clutch, Rear Internal Gear . .
Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub . . . . . . . . . . . . ..
High and Low Reverse Clutch . . . . . . . ..
Direct Clutch . . . . . . . . . . . . . . .
ASSEMBLY . . . . . . . . . . . . . ..
Assembly (1) . . . . . . . . . . . . . . .
Adjustment . . . . . . . . . . . . . . .
Assembly (2) . . . . . . . . . . . . . . .
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . .
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . .
General Specification . . . . . . . . . . .
Vehicle Speed at Which Gear Shifting Occurs . .
Vehicle Speed at Which Lock-up Occurs/Releas-
es . . . . . . . . . . . . . . . . . . ..
Stall Speed . . . . . . . . . . . . . . .
Line Pressure . . . . . . . . . . . . . .
Input Speed Sensor . . . . . . . . . . . ..
Output Speed Sensor . . . . . . . . . . ...
Reverse Brake . . . . . . . . . . . . . ..
Total End Play . . . . . . . . . . . . . ...
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DIAGNOSIS AND REPAIR WORKFLOW
TM-5
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
INFOID:0000000005148505
INTRODUCTION
The TCM receives a signal from the output speed sensor, accelera-
tor pedal position sensor or transmission range switch. Then pro-
vides 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 an error that occurs intermit-
tently rather than continuously. Most intermittent errors are caused
by poor electric connections or improper wiring. In this case, careful
checking of suspected circuits may help prevent the replacement of
good parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-III (or GST) or a circuit tester connected should be
performed. Follow the “DETAILED FLOW”.
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 errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “Diagnostic work sheet” as shown on
the example (Refer to
) should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
DETAILED FLOW
1.
COLLECT THE INFORMATION FROM THE CUSTOMER
Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using diagnosis worksheet. Refer to
.
>> GO TO 2.
2.
CHECK SYMPTOM 1
Check the following items based on the information obtained from the customer.
• Fail-safe. Refer to
• A/T fluid inspection. Refer to
TM-148, "Checking the A/T Fluid (ATF)"
• Stall test. Refer to
TM-155, "Inspection and Judgment"
• Line pressure test. Refer to
TM-157, "Inspection and Judgment"
.
SAT631IB
SAT632I
SEF234G
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