2008 INFINITI QX56 air condition

SYSTEM SYMPTOMTM-127
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
NG >> Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
- Power train system. Refer to TM-232, "
Disassembly".
- Transmission case. Refer to TM-232, "
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 TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.43).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10.CHECK SYMPTOM
Check again. Refer to TM-5, "
Work Flow".
OK or NG
OK >> INSPECTION END
NG >> GO TO 11.
11 .PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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.
12.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.43).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-129
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
- Power train system. Refer to TM-232, "
Disassembly".
- Transmission case. Refer to TM-232, "
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 TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.23).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1", TM-192, "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 TM-103, "
Reference Value".
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.
12.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.23).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-131
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
1. Check control valve with TCM. Refer to TM-201, "Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
- Power train system. Refer to TM-232, "
Disassembly".
- Transmission case. Refer to TM-232, "
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 TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.10).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1", TM-192, "Cruise Test - Part 2", TM-193, "Cruise Test -
Part 3"
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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 TM-151,
"Symptom Table" (Symptom No.10).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D2 →D3INFOID:0000000001604188
SYMPTOM:
The vehicle does not shift-up from D2 to D3 gear at the specified speed.
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-133
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
- Power train system. Refer to TM-232, "Disassembly".
- Transmission case. Refer to TM-232, "
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 TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.11).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1", TM-192, "Cruise Test - Part 2", TM-193, "Cruise Test -
Part 3"
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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 TM-151,
"Symptom Table" (Symptom No.11).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D3 →D4INFOID:0000000001604189
SYMPTOM:
•The vehicle does not shift-up from the D3 to D4 gear at the specified speed.
• The vehicle does not shift-up from the D
3 to D4 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1.CONFIRM THE SYMPTOM
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-135
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
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 TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.12).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1", TM-192, "Cruise Test - Part 2", TM-193, "Cruise Test -
Part 3"
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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 TM-151,
"Symptom Table" (Symptom No.12).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D4 →D5INFOID:0000000001604190
SYMPTOM:
•The vehicle does not shift-up from the D4 to D5 gear at the specified speed.
• The vehicle does not shift-up from the D
4 to D5 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1.CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position and vehicle can be started from D
1.
OK or NG
SCIA5199E
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-137
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
2. Check A/T fluid condition. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
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 TM-151,
"Symptom Table" (Symptom No.13).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1".
OK or NG
OK >> INSPECTION END
NG >> GO TO 10.
10.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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 TM-151,
"Symptom Table" (Symptom No.13).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Perform Lock-upINFOID:0000000001604191
SYMPTOM:
A/T does not perform lock-up at the specified speed.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, input
speed sensor, accelerator pedal position sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-63, "Diagnosis Procedure", TM-51, "Diagnosis
Procedure", TM-46, "Diagnosis Procedure", EC-382, "Diagnosis Procedure", TM-38, "Diagnosis
Procedure".
SCIA5199E
Revision: March 2010 2008 QX56

TM-138
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to TM-178, "
Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 3.
NG >> Refill ATF.
3.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to TM-187,
"Inspection and Judgment".
OK or NG
OK >> GO TO 6.
NG - 1 >> Line pressure high. GO TO 4.
NG - 2 >> Line pressure low. GO TO 5.
4.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to TM-201, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to TM-232, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to TM-250, "
Oil Pump".
- Power train system. Refer to TM-232, "
Disassembly".
- Transmission case. Refer to TM-232, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-199, "
Oil Pan".
SAT638A
SAT494G
Revision: March 2010 2008 QX56

SYSTEM SYMPTOMTM-139
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
2. Check A/T fluid condition. Refer to TM-178, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 7.
NG >> GO TO 10.
7.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8.CHECK SYMPTOM
Check again. Refer to TM-190, "
Cruise Test - Part 1".
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.
9.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-103, "
Reference Value".
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.
10.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to TM-151,
"Symptom Table" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
A/T Does Not Hold Lock-up ConditionINFOID:0000000001604192
SYMPTOM:
The lock-up condition cannot be main tained for more than 30 seconds.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TM-32, "
CONSULT-III Function (TRANSMISSION)".
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, input
speed sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to TM-63, "Diagnosis Procedure", TM-51, "Diagnosis
Procedure", TM-46, "Diagnosis Procedure", TM-38, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK A/T FLUID LEVEL
SCIA5199E
Revision: March 2010 2008 QX56