check engine INFINITI M35 2007 Factory Service Manual

TROUBLE DIAGNOSIS
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Revision: 2007 April2007 M35/M45
*1 : The values are changed by throttle opening and engine speed.
*2 : Mode switch is not equipped, but displayed.
CONSULT-II Function (ALL MODE AWD/4WD)NDS000DM
FUNCTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
RR RH SENSOR [km/h] or [mph]Wheel speed (Rear wheel
right)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
RR LH SENSOR [km/h] or [mph]Wheel speed (Rear wheel
left)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
BATTERY VOLT [V]Power supply voltage for
AWD control unitIgnition switch: ON Battery voltage
THRTL POS SEN [%] Throttle opening conditionWhen depressing accelerator pedal
(Value rises gradually in response to
throttle position.)0 - 100%
ETS SOLENOID [A]Monitored value of current at
AWD solenoidEngine running

At idle speedApprox. 0.000A
Engine running

When depressing accelerator
pedalApprox. 0.000 - 0.500A*1
STOP LAMP SW [ON/OFF]Condition of brake pedal
operationBrake pedal: Depressed ON
Brake pedal: Released OFF
ENG SPEED SIG [RUN/STOP] Condition of engine runningEngine stopped
(Engine speed: Less than 400 rpm)STOP
Engine running
(Engine speed: 400 rpm or more)RUN
ETS ACTUATOR [ON/OFF]Operating condition of AWD
actuator relay (integrated in
AWD control unit)Engine stopped (Ignition
switch: ON)OFF
Engine running ON
4WD WARN LAMP [ON/OFF] AWD warning lamp conditionAWD warning lamp: ON ON
AWD warning lamp: OFF OFF
4WD MODE SW*
2 [AUTO]Input condition from mode
switchAlways AUTO
4WD MODE MON [AUTO] Control status of AWD Engine running AUTO
DIS-TIRE MONI [mm]Improper size tire installed
conditionVehicle running with normal size tire
installed0-4 mm
Vehicle running with improper size
tire installed (Front/rear tire size dif-
ference, wear condition)4-8 mm, 8- mm
P BRAKE SW [ON/OFF] Condition of parking brakeParking brake operated ON
Parking brake not operated OFF Monitor item [Unit] Content Condition Display value
Diagnostic test mode FunctionReference
page
Self-diagnostic results

Self-diagnostic results can be read and erased quickly.TF-22
Data monitor
Input/Output data in the AWD control unit can be read.TF-24

TF-22
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Stop vehicle. With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing
operation.
NOTE:

The details for “TIME” are as follow:
–“0”: Error currently detected with AWD control unit.
–Except for “0”: Error detected in the past and memorized
with AWD control unit.
Detects frequency of driving after DTC occurs (frequency
of turning ignition switch “ON/OFF”).
Display Item List
CAUTION:

If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communica-
tion line.

Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH) or more after
turning ignition switch “OFF” if AWD warning lamp turns ON with system malfunction of “ABS SYSTEM [C1203]”. AWD
warning lamp may not turn OFF if it is normal unless ignition switch turns OFF at once and engine restarts after that.
How to Erase Self-Diagnostic Results
1. Perform applicably inspection of malfunctioning item and then repair or replace.
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Make sure that ABS warning lamp turns OFF.
CAN diagnostic support monitor
The results of transmit/receive diagnosis of CAN communication can be read.LAN-44
Active test
Diagnostic Test Mode in which CONSULT-II drives some actuators apart from
the AWD control unit and also shifts some parameters in a specified range.TF-25
ECU part number
AWD control unit part number can be read.TF-25
Diagnostic test mode FunctionReference
page
SDIA2217E
Items (CONSULT-II screen
terms)Diagnostic item is detected when... Check item
CONTROLLER FAILURE
[C1201]Malfunction has occurred inside AWD control unit.TF-27, "
AWD Control Unit"
ABS SYSTEM
[C1203]Malfunction related to wheel sensor has been detected by ABS actu-
ator and electric unit (control unit).TF-27, "ABS System"
4WD SOLENOID
[C1204]Malfunction related to AWD solenoid has been detected.TF-28, "AWD Solenoid"
4WD ACTUATOR RLY
[C1205]Malfunction has been detected from AWD actuator relay integrated
with AWD control unit, or malfunction related to AWD solenoid has
been detected.TF-31, "AWD Actuator
Relay" or TF-28, "AWD
Solenoid"
ENGINE SIGNAL 1
[C1210]Malfunction has been detected from ECM.TF-32, "Engine Control Sig-
nal"
CAN COMM CIRCUIT
[U1000]When AWD control unit is not transmitting or receiving CAN commu-
nication signal for 2 seconds or more.TF-32, "CAN Communica-
tion Line"
NO DTC IS DETECTED.
FURTHER TESTING MAY BE
REQUIRED.No NG item has been detected. —

TROUBLE DIAGNOSIS
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Revision: 2007 April2007 M35/M45
ACTIVE TEST MODE
Description
Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data
monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT-II to check
operation of actuator.
Test Item
CAUTION:
Do not continuously energize for a long time.
AWD CONTROL UNIT PART NUMBER
Ignore the AWD control unit part number displayed in the “ECU PART NUMBER”.
Refer to parts catalog to order the AWD control unit.
Test item Condition Description
ETS S/V
(Detects AWD solenoid)

Vehicle stopped

Engine running

No DTC detected

Change command current value to AWD solenoid, and then change driv-
ing mode. (Monitor value is normal if it is within approximately ±10% of
command value.)
Qu: Increase current value in increments of 0.20A
Qd: Decrease current value in increments of 0.20A
UP: Increase current value in increments of 0.02A
DOWN: Decrease current value in increments of 0.02A

TF-26
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSIS FOR SYSTEMPFP:00000
Power Supply Circuit for AWD Control UnitNDS000DN
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE
1. CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between AWD control unit harness connector ter-
minals and ground.
5. Turn ignition switch “OFF”.
6. Check voltage between AWD control unit harness connector ter-
minals and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.

10A fuse [No.33, located in the fuse block (J/B)]

10A fuse [No.82, located in the IPDM E/R]

Harness for short or open between battery and AWD control unit harness connector terminal 9

Harness for short or open between ignition switch and AWD control unit harness connector ter-
minal 7

Ignition switch. Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
Monitor item [Unit] Condition Display value (Approx.)
BATTERY VOLT [V] Ignition switch: ON Battery voltage
Connector Terminal Voltage (Approx.)
F1097 - Ground
Battery voltage
9 - Ground
SDIA2319E
Connector Terminal Voltage (Approx.)
F1097 - Ground 0V
9 - Ground Battery voltage
SDIA2320E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-27
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Revision: 2007 April2007 M35/M45
2. CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Check continuity between AWD control unit harness connector
F109 terminals 10, 11 and ground.
Also check harness for short to ground and short to power.
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 DTC
Start engine.
Does AWD warning lamp turn OFF?
YES >>INSPECTION END
NO >> Perform the self-diagnosis, repair or replace damaged parts. Refer to TF-22, "
SELF-DIAG
RESULT MODE" .
AWD Control UnitNDS000DO
DIAGNOSTIC PROCEDURE

Check the following if “CONTROLLER FAILURE [C1201]” is displayed in self-diagnosis results of CON-
SULT-II.
1. PERFORM SELF-DIAGNOSIS
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the
“CONTROLLER FAILURE [C1201]” displayed?
YES >> Replace AWD control unit. Refer to TF-39, "AWD CONTROL UNIT" .
NO >>INSPECTION END
ABS SystemNDS000DP
DIAGNOSTIC PROCEDURE

Check the following if “ABS SYSTEM [C1203]” is displayed in self-diagnosis results of CONSULT-II.
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-24, "
Self-Diagnosis" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.Continuity should exist.
SDIA1883E

TF-28
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2007 April2007 M35/M45
2. CHECK DTC AFTER DRIVING
1. Turn ignition switch “OFF”.
2. Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.
3. Make sure that ABS warning lamp turns OFF.
4. Perform erase self-diagnosis results. Refer to TF-22, "
How to Erase Self-Diagnostic Results" .
5. Stop vehicle and turn ignition switch “OFF”.
6. Turn ignition switch “ON”.
7. Perform self-diagnosis.
Is the
“ABS SYSTEM [C1203]” displayed?
YES >> GO TO 3.
NO >>INSPECTION END
3. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 4.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-24,
"Self-Diagnosis" .
AWD SolenoidNDS000DQ
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
*: The values are changed by throttle opening and engine speed.
DIAGNOSTIC PROCEDURE

Check the following if “4WD SOLENOID [C1204]” is displayed in self-diagnosis results of CONSULT-II.
Monitor item [Unit] Condition Display value
ETS SOLENOID [A] Engine runningAt idle speed Approx. 0.000A
When depressing accelerator pedal Approx. 0.000 - 0.500A*

TROUBLE DIAGNOSIS FOR SYSTEM
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1. CHECK AWD SOLENOID SIGNAL
With CONSULT-II
1. Start engine.
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Read out the value of “ETS SOLENOID”.
*: The values are changed by throttle opening and engine speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Turn ignition switch “ON”. (Do not start engine.)
4. Check voltage between AWD control unit harness connector ter-
minal 9 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the following. If any items are damaged, repair or
replace damaged parts.

10A fuse [No. 33, located in the fuse block (J/B)]

Harness for short or open between battery and AWD
control unit harness connector terminal 9
3. CHECK AWD SOLENOID CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect AWD control unit harness connector.
3. Check resistance between AWD control unit harness connector
terminals 1 and 2.
OK or NG
OK >> GO TO 6.
NG >> GO TO 4.
Condition Display value
Engine runningAt idle speed Approx. 0.000A
When depressing accelerator
pedalApprox. 0.000 - 0.500A*
SDIA1885E
Connector Terminal Voltage (Approx.)
F109 9 - Ground Battery voltage
SDIA1884E
Connector Terminal Resistance (Approx.)
F109 1 - 2 (Ground) 2.45 Ω
SDIA1928E

TROUBLE DIAGNOSIS FOR SYSTEM
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Revision: 2007 April2007 M35/M45
3. Check resistance between transfer assembly harness connector
F43 terminals 1 and 2.
4. If NG, replace electric controlled coupling. Refer to TF-45, "
Dis-
assembly and Assembly" .
AWD Actuator RelayNDS000DR
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
DIAGNOSTIC PROCEDURE

Check the following if “4WD ACTUATOR RLY [C1205]” is displayed in self-diagnosis results of CONSULT-
II.
1. CHECK AWD SOLENOID SYSTEM
Perform self-diagnosis. Refer to TF-22, "
SELF-DIAG RESULT MODE" .
Is the
“4WD SOLENOID [C1204]” displayed?
YES >> Perform trouble diagnosis for AWD solenoid. Refer to TF-28, "AWD Solenoid" .
NO >> GO TO 2.
2. CHECK AWD ACTUATOR RELAY SIGNAL
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Start engine and read out ON/OFF signal of “ETS ACTUATOR”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 4.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts. 1 - 2 : Approx. 2.45Ω
SDIA2162E
Monitor item Condition Display value
ETS ACTUATOR [ON/OFF]Engine stopped (Ignition switch: ON) OFF
Engine running ON
Monitor item Condition Display value
ETS ACTUATOREngine stopped (Ignition switch: ON) OFF
Engine running ON
SDIA1897E

TF-32
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2007 April2007 M35/M45
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Replace AWD control unit.
Engine Control SignalNDS000DS
DIAGNOSTIC PROCEDURE

Check the following if “ECM SIGNAL 1 [C1210]” is displayed in self-diagnosis results of CONSULT-II.
1. CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-55, "
Emission-Related Diagnostic Information" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 3.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with ECM again. Refer to EC-55, "
Emission-Related Diagnostic Informa-
tion" .
CAN Communication LineNDS000DT
DIAGNOSTIC PROCEDURE

Check the following if “CAN COMM CIRCUIT [U1000]” is detected in self-diagnosis results of CONSULT-
II.
1. CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with in CONSULT-II.
3. Perform the self-diagnosis.
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Print out CONSULT-II screen and go to LAN-50, "CAN
System Specification Chart" .
NO >>INSPECTION END
SDIA1850E

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
AWD Warning Lamp Does Not Turn ON When The Ignition Switch Is Turned to
ON
NDS000DU
DIAGNOSTIC PROCEDURE
1. CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to TF-22, "
SELF-DIAG RESULT MODE" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to TF-32, "CAN Communication
Line" .
NO >> GO TO 2.
2. CHECK AWD CONTROL UNIT
Check AWD control unit input/output signal. Refer to TF-20, "
AWD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 3.
NG >> Check AWD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3. CHECK OUTPUT SIGNAL WITH UNIFIED METER AND A/C AMP.
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “METER A/C AMP” with CONSULT-II.
3. Start the engine, and then make sure that “4WD W/L” display
turns from "ON" to "OFF" after several seconds.
OK or NG
OK >> GO TO 4.
NG >> Perform trouble diagnosis for combination meter. Refer
to DI-18, "
Trouble Diagnosis" .
4. SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace unified meter control unit assembly. Refer to DI-27, "
Disassembly and Assembly of Com-
bination Meter" .
AWD Warning Lamp Does Not Turn OFF Several Seconds after Engine StartedNDS000DV
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to TF-22, "
SELF-DIAG RESULT MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
Monitor item Condition Display value
4WD W/LIgnition switch ON ON
Start engine (after several seconds) OFF
SDIA2065E