2004 INFINITI QX56 Ins

AT-104
DTC U1000 CAN COMMUNICATION LINE
Revision: August 20072004 QX56
Diagnostic ProcedureUCS002DD
1. CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
Is any malfunction of the
“CAN COMM CIRCUIT” indicated?
YES >> Print out CONSULT-II screen, GO TO LAN section.
Refer to LAN-3, "
Precautions When Using CONSULT-II"
.
NO >>INSPECTION END
PCIA0061E

AT-106
DTC P0615 START SIGNAL CIRCUIT
Revision: August 20072004 QX56
Diagnostic ProcedureUCS002DJ
1. CHECK STARTER RELAY
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II and check monitor “STARTER
RELAY” ON/OFF.
Without CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Check the voltage between the IPDM E/R connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING ITEM
Check the following items:

Starter relay, Refer to SC-10, "STARTING SYSTEM" .

IPDM E/R, Refer to PG-17, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)" .

Disconnections or short-circuits in the harness between TCM and IPDM E/R.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK TCM
Perform TCM input/output signals inspection. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
Check the following items:

Power supply and ground circuit for TCM.

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
Item name Condition Display value
STARTER RELAYSelector lever in N, P position. ON
Selector lever in other position. OFF
PCIA0056E
Item ConnectorTe r m i n a l
(Wirer color)Shift position Voltage (Approx.)
Sta rte r
relayE12248
(B/R)GroundN and P Battery voltage
R, D and M 0V
LCIA0320E

DTC P0615 START SIGNAL CIRCUIT
AT-107
D
E
F
G
H
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MA
B
AT
Revision: August 20072004 QX56
5. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 0 5 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 4 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.

AT-108
DTC P0700 TCM
Revision: August 20072004 QX56
DTC P0700 TCMPFP:31036
DescriptionUCS002DK
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis LogicUCS002DL

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “TCM” with CONSULT-II or P0700 without CONSULT-II is detected when the
TCM is malfunctioning.
Possible CauseUCS002DM
TCM.
DTC Confirmation ProcedureUCS002DN
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. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Run engine for at least 2 consecutive seconds at idle speed.
5. If DTC is detected, go to AT-108, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnostic ProcedureUCS002DO
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode for “A/T” with CONSULT-
II.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform DTC Confirmation Procedure, AT - 1 0 8 , "
DTC Confirma-
tion Procedure" .
Is the
“TCM” displayed again?
YES >> Replace the control valve with TCM. Refer to AT-241,
"Control Valve With TCM and A/T Fluid Temperature
Sensor 2" .
NO >>INSPECTION END
BCIA0030E
BCIA0031E

AT-110
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Revision: August 20072004 QX56
Diagnostic ProcedureUCS002DU
1. CHECK PNP SW CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
3. Read out “N·P”, “R” and “D” position switches moving selector
lever to each position.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK TCM
Perform TCM input/output signals inspection. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT-109, "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT-241, "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following items:

Power supply and ground circuit for TCM.

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
Item name Condition Display value
SLCTLVR POSISelector lever in “N”,“P” position. N/P
Selector lever in “R” position. R
Selector lever in “D” position. D
Selector lever in “4” position. 4
Selector lever in “3” position. 3
Selector lever in “2” position. 2
Selector lever in “1” position. 1
PCIA0034E

DTC P0705 PARK/NEUTRAL POSITION SWITCH
AT-111
D
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MA
B
AT
Revision: August 20072004 QX56
6. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 0 9 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
AT-113
D
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F
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B
AT
Revision: August 20072004 QX56
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnostic ProcedureUCS002E0
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Start the engine.
4. Read out the value of “VHCL/S SE·A/T” while driving.
Check the value changes according to driving speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK TCM
Perform TCM input/output signals inspection. Refer to AT-90, "
TCM Input/Output Signal Reference Values" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 11 2 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 4 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following items:

Power supply and ground circuit for TCM.

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches the
speedometer reading.
SCIA2148E

AT-114
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: August 20072004 QX56
6. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT-112, "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.