2009 INFINITI QX56 200

TM-148
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
2. Check A/T fluid condition. Refer to TM-179, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 5.
NG >> GO TO 8.
5.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.16).
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK SYMPTOM
Check again. Refer to TM-194, "Cruise Test - Part 3"
.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
7.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-104, "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.
8.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.16).
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: 2GR → 1GRINFOID:0000000003772010
SYMPTOM:
When shifted from 22 to 11 position, does not down shift from 2GR to 1GR.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to TM-32, "CONSULT-III Function (TRANSMISSION)"
.
Do the self-diagnosis results indicate transmission range switch?
YES >> Check the malfunctioning system. Refer to TM-44, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITO R" mode for "TRANSMISSION" with CONSULT-III.
3. Read out "1 POSITION SW" switch moving selector lever to each position.
SCIA5199E
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-149
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Without CONSULT-III
1. Turn ignition switch “ON”.(Do not start engine)
2. Check voltage between A/T shift selector harness connector ter- minal and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-179, "Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
 Refer to TM-195, "Checking of A/T Position"
.
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to TM-195, "Adjustment of A/
T Position".
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-201, "Oil Pan"
.
Monitor item Condition Display value
1 POSITION SWWhen setting the selector
lever to "1" position.
ON
When setting selector le-
ver to other positions. OFF
Item Connector No. Terminal No. Condition Data
(Approx.)
1st position switch M203 7 - Ground When setting
the selector le-
ver to "1" posi-
tion.
0V
When setting
selector lever
to other posi-
tions. Battery voltage
AWDIA0811ZZ
SAT638A
LCIA0345E
Revision: December 20092009 QX56

TM-150
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
2. Check A/T fluid condition. Refer to TM-179, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to TM-193, "Cruise Test - Part 2"
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to TM-104, "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.
9.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Vehicle Does Not Decele rate By Engine BrakeINFOID:0000000003772011
SYMPTOM:
No engine brake is applied when the gear is shifted from the 22 to 11.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis.
Do the self-diagnosis results indicate transmission range switch?
YES >> Check the malfunctioning system. Refer to TM-44, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITO R" mode for "TRANSMISSION" with CONSULT-III.
3. Read out "1 POSITION SW" moving switch selector lever to each position.
SCIA5199E
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-151
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
Without CONSULT-III
1. Turn ignition switch “ON”.(Do not start engine)
2. Check voltage between A/T shift selector harness connector ter- minal and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to TM-179, "Checking the A/T Fluid
(ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK CONTROL CABLE
Check the control cable.
 Refer to TM-195, "Checking of A/T Position"
.
OK or NG
OK >> GO TO 5.
NG >> Adjust control cable. Refer to TM-195, "Adjustment of A/
T Position".
5.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to TM-201, "Oil Pan"
.
Monitor item Condition Display value
1 POSITION SWWhen setting the selector
lever to "1" position.
ON
When setting selector le-
ver to other positions. OFF
Item Connector No. Terminal No. Condition Data
(Approx.)
1st position switch M203 7 - Ground When setting
the selector le-
ver to "1" posi-
tion.
0V
When setting
selector lever
to other posi-
tions. Battery voltage
AWDIA0811ZZ
SAT638A
LCIA0345E
Revision: December 20092009 QX56

TM-152
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
2. Check A/T fluid condition. Refer to TM-179, "Checking the A/T
Fluid (ATF)".
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" ((Symptom No.53).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to TM-194, "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 TM-104, "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.
9.DETECT MALFUNCTIONING ITEM
 Check the malfunction items. If any items are dam aged, repair or replace damaged parts. Refer to TM-152,
"Symptom Table" (Symptom No.53).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Symptom TableINFOID:0000000003772012
 The diagnostics item numbers sh ow the sequence for inspection. Inspect in order from item 1.
 Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to TM-179, "Checking the
A/T Fluid (ATF)".
SCIA5199E
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-153
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
No. Items Symptom Condition Diagnostic Item Reference
page
1
Shift
Shock Large shock. (“N”
→“
D” position)
Refer to TM-122,
"Large Shock("N" to
"D" Position)" . ON vehicle 1. Engine idle speed
EC-17
2. Engine speed signalTM-52
3. Accelerator pedal position sensorTM-70
4. Control cable adjustmentTM-195
5. ATF temperature sensor TM-72
6. Front brake solenoid valveTM-82
7. CAN communication line LAN-4
8. Fluid level and stateTM-179
9. Line pressure testTM-188
10. Control valve with TCMTM-203
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to
TM-8, TM-9 . TM-232
2 Shock is too large
when changing D1→

D
2. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Direct clutch solenoid valve TM-84
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Direct clutch TM-265
3Shock is too large
when changing D2→

D
3. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. High and low reverse clutch solenoid valve TM-86
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. High and low reverse clutch TM-263
Revision: December 20092009 QX56

TM-154
< SYMPTOM DIAGNOSIS >
SYSTEM SYMPTOM
4Shift
Shock Shock is too large
when changing D3→

D
4. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Input clutch solenoid valve TM-80
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Input clutch TM-253
5Shock is too large
when changing D4→

D
5. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Front brake solenoid valve TM-82
4. CAN communication line LAN-4
5. Engine speed signalTM-52
6. Input speed sensorTM-47
7. Output speed sensor and vehicle speed signalTM-49,
TM-74
8. Fluid level and state TM-179
9. Control valve with TCMTM-203
OFF vehicle10. Front brake (brake band)
TM-22011. Input clutchTM-253
6Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Engine speed signalTM-52
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56

SYSTEM SYMPTOMTM-155
< SYMPTOM DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
7
Shift
Shock Shock is too large for
upshift when accelera-
tor pedal is released.
ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Fluid level and state TM-179
8. Control valve with TCMTM-203
OFF vehicle9. Front brake (brake band)
TM-22010. Input clutchTM-253
11. High and low reverse clutchTM-263
12. Direct clutchTM-265
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. Engine speed signal TM-52
4. CAN communication line LAN-4
5. Input speed sensorTM-47
6. Output speed sensor and vehicle speed signalTM-49,
TM-74
7. Torque converter clutch solenoid valve TM-64
8. Fluid level and stateTM-179
9. Control valve with TCMTM-203
OFF vehicle 10. Torque converter TM-203
9Shock is too large dur-
ing engine brake. ON vehicle
1. Accelerator pedal position sensor
TM-70
2. Control cable adjustmentTM-195
3. CAN communication line LAN-4
4. Fluid level and stateTM-179
5. Control valve with TCMTM-203
OFF vehicle6. Front brake (brake band)
TM-2037. Input clutchTM-203
8. High and low reverse clutchTM-203
9. Direct clutchTM-203
No. Items Symptom Condition Diagnostic Item Reference
page
Revision: December 20092009 QX56