cruise control INFINITI QX56 2006 Factory User Guide

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSACS-37
[ICC]
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ACS
Revision: November 2009 2006 QX56
NOTE: DTC 55 will display when no malfunction is detected.
DTC 11 CONTROL UNITEKS00BM0
1. DIAGNOSTIC CHECK
Are any items other than “DTC 11 CONTROL UNIT ” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITEKS00BM1
1. DIAGNOSIS CHECK
With CONSULT-II
Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit, and ABS actuator and electric unit (control unit) connectors, and connect them securely again. Erase DTC, then perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and collapsed terminals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of
ICC system again.
NG >> GO TO 3.
98 GEAR POSITION ×××

TCM malfunction

A/T turbine revolution sensor
malfunction

A/T vehicle speed sensor mal-
functionACS-49
102 LASER STAIN
×× ×
ICC sensor body window has
contaminationACS-49
103 LASER SENSOR FAIL
×× ×
ICC sensor internal malfunctionACS-50
104 LASER AIMING INCMP ×× ×
Laser beam aiming of ICC sensor
is not adjustedACS-50
107 LASER COMM FAIL
×× ×

CAN data received by ICC sen-
sor is strange (from ICC unit,
combination meter or ECM)ACS-51
109 LASER HIGH TEMP
×× ×
Temperature around ICC sensor
is excessively highACS-51
DTC
No. CONSULT-II screen terms ICC sys-
tem
warning lamp Fail-safe
Malfunctions detected where... Refer-
ence
page
Vehicle-
to-vehi-cle dis- tance
control mode Conven-
tional
(fixed
speed) cruise
control
mode Brake
assist
(with pre- view
function)

ACS-52
[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
Symptom ChartEKS00BMJ
SymptomsReference page
Operation ON/OFF switch does not switch ON.
Symptom 1
ACS-53
ON/OFF switch does not switch OFF. Symptom 1
ACS-53
Cruise does not function for setting (powering functions). Symptom 2
ACS-53
CANCEL switch does not function. Symptom 3
ACS-54
RESUME does not function. Symptom 3
ACS-54
The set speed does not increase. Symptom 3
ACS-54
The set distance to the vehicle ahead cannot be changed. Symptom 3
ACS-54
The ICC is not cancelled when the gear is in "N". Symptom 4
ACS-55
Display/Chime The ICC system display does not appear.
Check combination meter. Refer to
DI-17, "
How to Proceed With Trou-
ble Diagnosis"
Chime does not function. Symptom 5
ACS-55
Control Driving force is hunting. Symptom 6
ACS-56
Function to detect the vehicle
ahead The system frequently cannot detect the vehicle ahead.
Symptom 7
ACS-56
The distance to detect the vehicle ahead is short. Symptom 7
ACS-56
The system misidentifies a vehicle even though there is no
vehicle ahead.

Refer to ACS-12, "LASER
BEAM AIMING ADJUSTMENT"

Refer to ACS-9, "ICC System
Running Test"
The system misidentifies a vehicle in the next lane.

Refer to ACS-12, "LASER
BEAM AIMING ADJUSTMENT"

Refer to ACS-9, "ICC System
Running Test"
The system does not detect a vehicle at all. Symptom 8
ACS-56

AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
CONTENTS
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Revision: November 2009 2006 QX56
INDEX FOR DTC ...................................................
..... 5
Alphabetical Index ............................................... ..... 5
DTC No. Index .................................................... ..... 6
PRECAUTIONS ..................................................... ..... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine .................................................... 7
Precautions ......................................................... ..... 8
Service Notice or Precautions ............................. ..... 9
PREPARATION ...................................................... ... 10
Special Service Tools .......................................... ... 10
Commercial Service Tools ................................... .... 11
A/T FLUID .............................................................. ... 12
Changing Automatic Transmission Fluid (ATF) ... ... 12
Checking Automatic Transmission Fluid (ATF) ... ... 12
A/T Fluid Cooler Cleaning ................................... ... 14
A/T CONTROL SYSTEM ....................................... ... 17
Cross-Sectional View (2WD models) .................. ... 17
Cross-Sectional View (4WD models) .................. ... 18
Shift Mechanism .................................................. ... 19
TCM Function ...................................................... ... 30
CAN Communication ........................................... ... 31
Input/Output Signal of TCM ................................. ... 31
Line Pressure Control ......................................... ... 32
Shift Control ........................................................ ... 33
Lock-up Control ................................................... ... 34
Engine Brake Control .......................................... ... 36
Control Valve ....................................................... ... 36
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 38
Introduction ......................................................... ... 38
OBD-II Function for A/T System .......................... ... 38
One or Two Trip Detection Logic of OBD-II ......... ... 38
OBD-II Diagnostic Trouble Code (DTC) .............. ... 38
Malfunction Indicator Lamp (MIL) ........................ ... 41
TROUBLE DIAGNOSIS ......................................... ... 42
DTC Inspection Priority Chart ............................. ... 42
Fail-Safe .............................................................. ... 42
How To Perform Trouble Diagnosis For Quick and Accurate Repair ...................................................
... 44
A/T Electrical Parts Location ............................... ... 49
Circuit Diagram ....................................................... 50
Inspections Before Trouble Diagnosis ................. ... 51
Check Before Engine is Started ........................... ... 55
Check at Idle ........................................................... 55
Cruise Test - Part 1 .............................................. ... 56
Cruise Test - Part 2 .............................................. ... 58
Cruise Test - Part 3 .............................................. ... 59
Vehicle Speed When Shifting Gears ................... ... 60
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................. 60
Vehicle Speed When Performing and Releasing
Slip Lock-up ............................................................ 60
Symptom Chart ....................................................... 61
TCM Input/Output Signal Reference Values ........ ... 83
CONSULT-II Function (A/T) ................................. ... 84
DTC U1000 CAN COMMUNICATION LINE ........... ... 96
Description ........................................................... ... 96
On Board Diagnosis Logic ................................... ... 96
Possible Cause ....................................................... 96
DTC Confirmation Procedure .............................. ... 96
Wiring Diagram — AT — CAN ............................. ... 97
Diagnostic Procedure .......................................... ... 99
DTC P0615 START SIGNAL CIRCUIT .................. .100
Description ........................................................... .100
CONSULT-II Reference Value ............................. .100
On Board Diagnosis Logic ................................... .100
Possible Cause .................................................... .100
DTC Confirmation Procedure .............................. .100
Wiring Diagram — AT — STSIG ......................... .101
Diagnostic Procedure .......................................... .102
DTC P0700 TCM .................................................... .104
Description ........................................................... .104
On Board Diagnosis Logic ................................... .104
Possible Cause .................................................... .104
DTC Confirmation Procedure .............................. .104
Diagnostic Procedure .......................................... .104
DTC P0705 PARK/NEUTRAL POSITION SWITCH .105
Description ........................................................... .105

TROUBLE DIAGNOSISAT-91
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Revision: November 2009 2006 QX56
ATF PRES SW 6 (ON-OFF display)XXX (for HLR/C solenoid)
PNP SW 1 (ON-OFF display) X— X
PNP SW 2 (ON-OFF display) X— X
PNP SW 3 (ON-OFF display) X— X
PNP SW 4 (ON-OFF display) X— X
SLCT LVR POSI —XX Selector lever position is recognized by the
TCM.
For fail-safe operation, the specific value used
for control is displayed.
1 POSITION SW (ON-OFF display) X— X 1st position switch
OD CONT SW (ON-OFF display) X— X 4th position switch
POWERSHIFT SW (ON-OFF display) X —X
Not mounted but displayed.
HOLD SW (ON-OFF display)
X— X
MANU MODE SW (ON-OFF display) X— X
NON M-MODE SW (ON-OFF display) X —X
UP SW LEVER (ON-OFF display) X— X
DOWN SW LEVER (ON-OFF display) X —X
SFT UP ST SW (ON-OFF display) ——X
SFT DWN ST SW (ON-OFF display) ——X
ASCD-OD CUT (ON-OFF display) ——X
ASCD-CRUISE (ON-OFF display) ——X
ABS SIGNAL (ON-OFF display) ——X
ACC OD CUT (ON-OFF display) ——X
ICC (Intelligent cruise control)
ACC SIGNAL (ON-OFF display) ——X
TCS GR/P KEEP (ON-OFF display) ——X
TCS SIGNAL 2 (ON-OFF display) ——X
TCS SIGNAL 1 (ON-OFF display) ——X
TCC SOLENOID (A) —XX
LINE PRES SOL (A) —XX
I/C SOLENOID (A) —XX
FR/B SOLENOID (A) —XX
D/C SOLENOID (A) —XX
HLR/C SOL (A) —XX
ON OFF SOL (ON-OFF display) ——X LC/B solenoid
TCC SOL MON (A) ——X
L/P SOL MON (A) ——X
I/C SOL MON (A) ——X
FR/B SOL MON (A) ——X
D/C SOL MON (A) ——X
HLR/C SOL MON (A) ——X
ONOFF SOL MON (ON-OFF display) ——X LC/B solenoid
P POSI IND (ON-OFF display) ——X
Monitored item (Unit)
Monitor Item Selection
Remarks
ECU
INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-193
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Revision: November 2009 2006 QX56
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 6 4 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 2 8 2 , "Oil Pump" .
–Power train system. Refer to AT- 2 6 4 , "Disassembly" .
–Transmission case. Refer to AT- 2 6 4 , "Disassembly" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 9.
NG >> GO TO 12.
9. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.23).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" , AT- 5 8 , "Cruise Test - Part 2" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 11.
11 . PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT- 8 3 , "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
SCIA5199E

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-195
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5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 6 4 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 2 8 2 , "Oil Pump" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 6 4 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 2 8 2 , "Oil Pump" .
–Power train system. Refer to AT- 2 6 4 , "Disassembly" .
–Transmission case. Refer to AT- 2 6 4 , "Disassembly" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 11.
8. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.10).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" , AT- 5 8 , "Cruise Test - Part 2" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
SCIA5199E

AT-200
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
7. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 11.
8. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.12).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" , AT- 5 8 , "Cruise Test - Part 2" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT- 8 3 , "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
11 . DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.12).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
SCIA5199E

AT-202
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 6 4 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 2 8 2 , "Oil Pump" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 6 4 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 2 8 2 , "Oil Pump" .
–Power train system. Refer to AT- 2 6 4 , "Disassembly" .
–Transmission case. Refer to AT- 2 6 4 , "Disassembly" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 11.
8. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.13).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
SCIA5199E

AT-206
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
2. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking Automatic Trans-
mission Fluid (ATF)" .
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.
4. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.25).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT- 8 3 , "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
SAT638A
SCIA5199E

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-211
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Revision: November 2009 2006 QX56
4. CHECK CONTROL CABLE
Check the control cable.

Refer to AT- 2 2 7 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to AT- 2 2 7 , "
Adjustment of A/
T Position" .
5. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.14).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7. CHECK SYMPTOM
Check again. Refer to AT- 5 9 , "
Cruise Test - Part 3" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.
8. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT- 8 3 , "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
LCIA0345E
SCIA5199E