200 INFINITI QX56 2009 Factory Service Manual

TM-36
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
DTC & SRT CONFIRMATION
DTC Work Support Mode
D POSI IND (ON-OFF display) — — X
4TH POSI IND (ON-OFF display) — — X
3RD POSI IND (ON-OFF display) — — X
2ND POSI IND (ON-OFF display) — — X
1ST POSI IND (ON-OFF display) — — X
MANU MODE IND (ON-OFF display) — — XNot mounted but displayed.
POWER M LAMP (ON-OFF display) — — X
F-SAFE IND/L (ON-OFF display) — — X
ATF WARN LAMP (ON-OFF display) — — X
BACK-UP LAMP (ON-OFF display) — — X
STARTER RELAY (ON-OFF display) — — X
RANGE SW3M (ON-OFF display) — — X
C/V CLB ID1 — — X
C/V CLB ID2 — — X
C/V CLB ID3 — — X
UNIT CLB ID1 — — X
UNIT CLB ID2 — — X
UNIT CLB ID3 — — X
TRGT GR RATIO — — X
TRGT PRES TCC (kPa) — — X
TRGT PRES L/P (kPa) — — X
TRGT PRES I/C (kPa) — — X
TRGT PRE FR/B (kPa) — — X
TRGT PRES D/C (kPa) — — X
TRG PRE HLR/C (kPa) — — X
SHIFT PATTERN — — X
DRV CST JUDGE — — X
START RLY MON — — X
NEXT GR POSI — — X
SHIFT MODE — — X
MANU GR POSI — — X
VEHICLE SPEED (km/h) — X X Vehicle speed recognized by the TCM.
Voltage (V) — — X Displays the value measured by the voltage
probe.
Frequency (Hz) — — X
The value measured by the pulse probe is dis-
played.
DUTY-HI (high) (%) — — X
DUTY-LOW (low) (%) — — X
PLS WIDTH-HI (ms) — — X
PLS WIDTH-LOW (ms) — — X Monitored item (Unit)
Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU
Revision: December 20092009 QX56

DIAGNOSIS SYSTEM (TCM)TM-37
< FUNCTION DIAGNOSIS >
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Diagnosis Procedure without CONSULT-IIIINFOID:0000000004024115
OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)
Refer to EC-72, "Generic Scan Tool (GST) Function".
OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Refer to EC-55, "Malfunction Indicator Lamp (MIL)".
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Description
When the ignition switch is switched “ON”, the A/T CHECK indicator lamp lights up for 2 seconds. As a method
for locating the suspect circuit, w hen the self-diagnostics start signal is input, the memory for the malfunction
location is output and the A/T CHECK indicator lamp flashes to display the corresponding DTC.
Diagnostic Procedure
1.CHECK A/T CHECK INDICATOR LAMP
1. Start the engine with selector lever in “P” pos ition. Warm engine to normal operating temperature.
2. Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.
3. Wait 10 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> GO TO 2.
NO >> GO TO TM-119, "A/T Check Indicator Lamp Does Not Come On"
.
2.JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal “ON”.)
5. Depress brake pedal. (Stop lamp switch signal “ON”.)
6. Turn ignition switch ON. (Do not start engine.)
7. Wait 3 seconds.
8. Move the selector lever from “D” to “3” position.
9. Release brake pedal. (Stop lamp switch signal “OFF”.)
10. Move the selector lever from “3” to “2” position.
11. Depress brake pedal. (Stop lamp switch signal “ON”.)
DTC work support item Description Check item
1ST GR FUNCTN P0731 Following items for “” be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed
or not)
 Self-diagnosis result (OK or NG)
 Input clutch solenoid valve
 Front brake solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Each clutch
 Hydraulic co ntrol circuit
valve
2ND GR FUNCTN P0732
Following items for “” be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed
or not)
 Self-diagnosis result (OK or NG)
3RD GR FUNCTN P0733 Following items for “” be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed
or not)
 Self-diagnosis result (OK or NG)
4TH GR FUNCTN P0734 Following items for “” be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed
or not)
 Self-diagnosis result (OK or NG)
5TH GR FUNCTN P0735 Following items for “” be confirmed.
 Self-diagnosis status (whether the diagnosis is being performed
or not)
 Self-diagnosis result (OK or NG)
Revision: December 20092009 QX56

TM-38
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
12. Depress accelerator pedal fully and release it.>> GO TO 3.
3.CHECK SELF-DIAGNOSIS CODE
Check A/T CHECK indicator lamp.
Refer to "Judgement Self-diagnosis Code".
If the system does not go into self-diagnostics. Refer to TM-44, "Diagnosis Procedure"
, TM-94, "Diagnosis
Procedure", TM-95, "Diagnosis Procedure".
>> DIAGNOSIS END
Judgement Self-diagnosis Code
If there is a malfunction, the lamp lights up fo r the time corresponding to the suspect circuit.
Erase Self-diagnosis
 In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.
 However, this information is erased by turning igni tion switch OFF after executing self-diagnostics or by
erasing the memory using the CONSULT-III.
ABDIA0593GB
Revision: December 20092009 QX56

U1000 CAN COMM CIRCUITTM-39
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003771825
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communica tion speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicl e, and each control unit shares information and links
with other control units during operation (not independent ). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L li ne) allowing a high rate of information transmission
with less wiring. Each control unit transmits/recei ves data but selectively reads required data only.
On Board Diagnosis LogicINFOID:0000000003771826
 This is an OBD-III self-diagnostic item.
 Diagnostic trouble code “U1000” with CONSULT-III is detected when TCM cannot communicate to other
control units.
Possible CauseINFOID:0000000003771827
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000003771828
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-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to TM-39, "Diagnosis Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000003771829
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III.
Is any malfunction of the
“CAN COMM CIRCUIT” indicated?
YES >> Go to LAN section. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> INSPECTION END
Revision: December 20092009 QX56

TM-40
< COMPONENT DIAGNOSIS >
P0615 STARTER RELAY
P0615 STARTER RELAY
DescriptionINFOID:0000000003771830
 TCM prohibits cranking other than at “P” or “N” position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000003771831
On Board Diagnosis LogicINFOID:0000000003771832
 This is not an OBD-II self-diagnostic item.
 Diagnostic trouble code “P0615” with CONSULT-III is det ected when starter relay is switched “ON” other
than at “P” or “N” position. (Or when sw itched “OFF” at “P” or “N” position).
Possible CauseINFOID:0000000003771833
 Harness or connectors
[The starter relay and TCM circuit is open or shorted.]
 Starter relay
DTC Confirmation ProcedureINFOID:0000000003771834
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 proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle for at least 2 consecutive seconds.
5. If DTC is detected, go to TM-40, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003771835
1.CHECK STARTER RELAY
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “STARTER RELAY” ON/OFF.
Without CONSULT-III
Item name Condition Display value
STARTER RELAY Selector lever in “N”,“P” position. ON
Selector lever in other position. OFF
Item name Condition Display value
STARTER RELAY Selector lever in "N'', "P'' positions. ON
Selector lever in other positions. OFF
Revision: December 20092009 QX56

P0615 STARTER RELAYTM-41
< COMPONENT DIAGNOSIS >
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1. Turn ignition switch “ON”. (Do not start engine.)
2. Check voltage between the IPDM E/R connector and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK HARNESS BETWEEN A/T AS SEMBLY HARNESS CONNECTOR AND IPDM E/R CONECTOR.
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector and IPDM E/R connector.
3. Check continuity between A/T assembly harness connector and IPDM E/R connector.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK TERMINAL CORD ASSEMBLY
1. Remove control valve with TCM. Refer to TM-203, "Control Valve with TCM and A/T Fluid Temperature
Sensor 2"
2. Disconnect A/T assembly harness connector and TCM connector.
3. Check continuity between A/T assembly harness connector ter-
minal and TCM connector terminal.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Replace open circuit or short to ground and short to power in harness or connectors.
4.DETECT MALFUNCTIONING ITEM
Check the following items:
 Starter relay, Refer to STR-8, "System Description"
.
 IPDM E/R, Refer to PCS-21, "Physical Values"
.
OK or NG
OK >> Replace the control valve with TCM. Refer to TM-203, "Control Valve with TCM and A/T Fluid
Temperature Sensor 2".
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform “DTC Confirmation Procedure”.
Item Connector Terminal Shift position Voltage (Approx.)
Starter re-
lay E122 48 Ground "N'' and "P'' Battery voltage
"R'' and "D'' 0V
LCIA0320E
Item Connector Terminal Continuity
A/T assembly harness con-
nector F9 9
Ye s
IPDM E/R connector E122 48
WCIA0427E
Item Connector Terminal Continuity
A/T assembly harness con-
nector F9 9
Ye s
TCM connector F502 8
SCIA5440E
Revision: December 20092009 QX56

TM-42
< COMPONENT DIAGNOSIS >
P0615 STARTER RELAY
 Refer to TM-40, "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Revision: December 20092009 QX56

P0700 TRANSMISSION CONTROLTM-43
< COMPONENT DIAGNOSIS >
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P0700 TRANSMISSION CONTROL
DescriptionINFOID:0000000003771836
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 LogicINFOID:0000000003771837
 This is an OBD-II self-diagnostic item.
 Diagnostic trouble code “P0700” with CONSULT-III is detected when the TCM is malfunctioning.
Possible CauseINFOID:0000000003771838
TCM.
DTC Confirmation ProcedureINFOID:0000000003771839
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-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Run engine for at least 2 cons ecutive seconds at idle speed.
5. If DTC is detected, go to TM-43, "Diagnosis Procedure"
.
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis ProcedureINFOID:0000000003771840
1.CHECK DTC
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode fo r “TRANSMISSION” with CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform DTC Confirmation Procedure, TM-43, "DTC Confirmation Procedure"
.
Is the
“P7000” displayed again?
YES >> Replace the control valve with TCM. Refer to TM-203, "Control Valve with TCM and A/T Fluid
Temperature Sensor 2".
NO >> INSPECTION END
Revision: December 20092009 QX56

TM-44
< COMPONENT DIAGNOSIS >
P0705 TRANSMISSION RANGE SWITCH A
P0705 TRANSMISSION RANGE SWITCH A
DescriptionINFOID:0000000003771841
The transmission range switch detects the selector lever position and sends a signal to the TCM.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000003771842
On Board Diagnosis LogicINFOID:0000000003771843
 This is an OBD-II self-diagnostic item.
 Diagnostic trouble code “P0705” with CONSULT-III is detected under the following conditions.
- When TCM does not receive the correct voltage signal fr om the transmission range switch 1, 2, 3, 4 based
on the gear position.
- When no other position but “P” positi on is detected from “N” positions.
Possible CauseINFOID:0000000003771844
 Harness or connectors
[The transmission range switch 1, 2, 3, 4 and TCM circuit is open or shorted.]
 Transmission range s witch 1, 2, 3, 4
DTC Confirmation ProcedureINFOID:0000000003771845
CAUTION:
Always drive vehicle at a safe speed.
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 proc edure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
THRTL POS SEN: More than 1.2V
5. If DTC is detected, go to TM-44, "Diagnosis Procedure"
.
WITH GST
Follow the procedure “With CONSULT-III”.
Diagnosis ProcedureINFOID:0000000003771846
1.CHECK TRANSMISSION RANGE SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
Item name Condition Display value
SLCTLVR POSI Selector lever in
“N”,“P” positions. 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
Revision: December 20092009 QX56

P0705 TRANSMISSION RANGE SWITCH A
TM-45
< COMPONENT DIAGNOSIS >
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3. Check if correct selector lever position (N/P, R or D) is displayed as selector lever is moved into each posi- tion.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Perform TCM power supply and ground circuit. Refer to TM-92, "Diagnosis Procedure"
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.DETECT MALFUNCTIONING ITEM
Check the following items:
 A/T assembly harness connector pin terminals fo r damage or loose connection with harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK SUB-HARNESS
1. Remove control valve with TCM. Refer to TM-203, "Control
Valve with TCM and A/T Fluid Temperature Sensor 2".
2. Disconnect transmission range switch connector and TCM con- nector.
3. Check continuity between transmission range switch connector
(A) terminals and TCM connector (B) terminals.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
Item name Condition Display value
SLCTLVR POSI Selector lever in “N”,“P” positions. 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
Item Connector Terminal Continuity
Transmission range
switch connector F505 1
Ye s
TCM connector F503 13
Transmission range
switch connector F505 2
Ye s
TCM connector F503 11
Transmission range
switch connector F505 3
Ye s
TCM connector F503 12
Transmission range
switch connector F505 5
Ye s
TCM connector F503 14
JSDIA1328GB
Revision: December 20092009 QX56