Nissan Murano Z50 (2005 year). Manual - part 83

BASIC SERVICE PROCEDURE

EC-83

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10. 

CHECK IGNITION TIMING

1.

Run engine at idle.

2.

Check ignition timing with a timing light. Refer to 

EC-75, "IGNITION TIMING"

 .

OK or NG

OK (With CONSULT-II)>>GO TO 19.
OK (With GST)>>GO TO 20.
NG

>> GO TO 11.

11. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Stop engine.

2.

Perform 

EC-89, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 12.

12. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-89, "Throttle Valve Closed Position Learning"

 .

>> GO TO 13.

13. 

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-90, "Idle Air Volume Learning"

 .

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes

>> GO TO 14.

No

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

15 

±

 5

°

 BTDC (in P or N position)

PBIB1382E

EC-84

BASIC SERVICE PROCEDURE

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14. 

CHECK TARGET IDLE SPEED AGAIN

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Refer to 

EC-75, "IDLE SPEED"

 .

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Check idle speed. Refer to 

EC-75, "IDLE SPEED"

 .

OK or NG

OK

>> GO TO 15.

NG

>> GO TO 17.

15. 

CHECK IGNITION TIMING AGAIN

1.

Run engine at idle.

2.

Check ignition timing with a timing light. Refer to 

EC-75, "IGNITION TIMING"

 .

OK or NG

OK (With CONSULT-II)>>GO TO 19.
OK (With GST)>>GO TO 20.
NG

>> GO TO 16.

16. 

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to 

EM-60, "TIMING CHAIN"

 .

OK or NG

OK

>> GO TO 17.

NG

>> 1. Repair the timing chain installation.

2. GO TO 4.

17. 

DETECT MALFUNCTIONING PART

Check the following.

●

Check camshaft position sensor (PHASE) and circuit. Refer to 

EC-304

 .

●

Check crankshaft position sensor (POS) and circuit. Refer to 

EC-297

 .

OK or NG

OK

>> GO TO 18.

NG

>> 1. Repair or replace.

2. GO TO 4.

650 

±

 50 rpm (in P or N position)

650 

±

 50 rpm (in P or N position)

SEF174Y

15 

±

 5

°

 BTDC (in P or N position)

PBIB1382E

BASIC SERVICE PROCEDURE

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18. 

CHECK ECM FUNCTION 

1.

Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

BL-236, "ECM Re-communicating Function"

 .

>> GO TO 4.

19. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

 With CONSULT-II

1.

Turn ignition switch OFF and wait at a least 10 seconds.

2.

Start engine and warm it up to normal operating temperature.

3.

Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position.

NOTE:
Keep the accelerator pedal as steady as possible during the cruising.

4.

Then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).

NOTE:
Never apply brake during releasing the accelerator pedal.

5.

Repeat steps 3 to 4 for 5 times.

6.

Stop the vehicle and connect CONSULT-II to the vehicle.

7.

Make sure that no (1st trip) DTC is displayed in “SELF-DIAG RESULTS” mode.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 21.

20. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

 With GST

1.

Turn ignition switch OFF and wait at a least 10 seconds.

2.

Start engine and warm it up to normal operating temperature.

3.

Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position.

NOTE:
Keep the accelerator pedal as steady as possible during the cruising.

4.

Then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).

NOTE:
Never apply brake during releasing the accelerator pedal.

5.

Repeat steps 3 to 4 for 5 times.

6.

Stop the vehicle and connect GST to the vehicle.

7.

Make sure that no (1st trip) DTC is displayed.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 21.

EC-86

BASIC SERVICE PROCEDURE

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21. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 HARNESS

1.

Turn ignition switch OFF and disconnect battery ground cable.

2.

Disconnect ECM harness connector.

3.

Disconnect A/F sensor 1 harness connector.

4.

Check harness continuity between the following terminals. Refer to 

EC-485, "Wiring Diagram"

 .

5.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 22.

NG

>> 1. Repair open circuit or short to ground or short to power in harness or connectors between ECM

and A/F sensor 1.

2. GO TO 4.

22. 

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.

Reconnect ECM harness connector.

2.

Perform 

EC-89, "Accelerator Pedal Released Position Learning"

 .

>> GO TO 23.

23. 

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform 

EC-89, "Throttle Valve Closed Position Learning"

 .

>> GO TO 24.

24. 

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-90, "Idle Air Volume Learning"

 .

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes (With CONSULT-II)>>GO TO 25.
Yes (Without CONSULT-II)>>GO TO 26.
No

>> 1. Follow the instruction of Idle Air Volume Learning.

2. GO TO 4.

A/F sensor 1 terminal

ECM terminal

Bank 1

1

16

2

75

5

35

6

56

Bank 2

1

76

2

77

5

57

6

58

Continuity should exist.

BASIC SERVICE PROCEDURE

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25. 

CHECK CO%

 With CONSULT-II

1.

Start engine and warm it up until engine coolant temperature indicator points the middle of gauge.

2.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

3.

Select “ENG COOLANT TEMP” in “ACTIVE TEST” mode.

4.

Set “ENG COOLANT TEMP” to 5

°

C (41

°

F) by touching “DWN”

and “Qd”.

5.

Start engine and rev it (2,000 to 3,000 rpm) two or three times
under no load, then run engine at idle speed.

6.

Check CO%.

OK or NG

OK

>> GO TO 28.

NG

>> GO TO 27.

26. 

CHECK CO%

 Without CONSULT-II

1.

Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

2.

Turn ignition switch OFF.

3.

Disconnect engine coolant temperature sensor harness connector.

4.

Connect a resistor (4.4 k

Ω

) between terminals of engine coolant

temperature sensor harness connector.

5.

Start engine and rev it (2,000 to 3,000 rpm) two or three times
under no load, then run engine at idle speed.

6.

Check CO%.

7.

After checking CO%, turn ignition switch OFF, disconnect the
resistor from the terminals of engine coolant temperature sensor
harness connector, and then connect engine coolant tempera-
ture sensor harness connector to engine coolant temperature
sensor.

OK or NG

OK

>> GO TO 28.

NG

>> GO TO 27.

27. 

RECONNECT AIR FUEL RATIO (A/F) SENSOR 1 HARNESS CONNECTOR

1.

Turn ignition switch OFF.

2.

Reconnect A/F sensor 1 harness connector.

>> GO TO 31.

28. 

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

1.

Stop engine.

2.

Replace A/F sensor 1 on the malfunctioning bank.

With CONSULT-II>>GO TO 29.
With GST>>GO TO 30.

Idle CO: 0.7 

−

 9.9% and engine runs smoothly.

SEF172Y

Idle CO: 0.7 

−

 9.9% and engine runs smoothly.

SEF982UA

EC-88

BASIC SERVICE PROCEDURE

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29. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

 With CONSULT-II

1.

Turn ignition switch OFF and wait at a least 10 seconds.

2.

Start engine and warm it up to normal operating temperature.

3.

Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position.
NOTE:
Keep the accelerator pedal as steady as possible during the cruising.

4.

Then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).

NOTE:
Never apply brake during releasing the accelerator pedal.

5.

Repeat steps 3 to 4 for 5 times.

6.

Stop the vehicle and connect CONSULT-II to the vehicle.

7.

Make sure that no (1st trip) DTC is displayed in “SELF-DIAG RESULTS” mode.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 31.

30. 

CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

 With GST

1.

Turn ignition switch OFF and wait at a least 10 seconds.

2.

Start engine and warm it up to normal operating temperature.

3.

Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in D position.

NOTE:
Keep the accelerator pedal as steady as possible during the cruising.

4.

Then release the accelerator pedal fully until the vehicle speed decreases to 50 km/h (30 MPH).
NOTE:
Never apply brake during releasing the accelerator pedal.

5.

Repeat steps 3 to 4 for 5 times.

6.

Stop the vehicle and connect GST to the vehicle.

7.

Make sure that no (1st trip) DTC is displayed.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 31.

31. 

DETECT MALFUNCTIONING PART

Check the following.

●

Check fuel pressure regulator, and repair or replace if necessary. Refer to 

EC-92, "Fuel Pressure Check"

 .

●

Check mass air flow sensor and its circuit, and repair or replace if necessary. Refer to 

EC-183

  and 

EC-

192

 .

●

Check injector and its circuit, and repair or replace if necessary. Refer to 

EC-663

 .

●

Check engine coolant temperature sensor and its circuit, and repair or replace if necessary. Refer to 

EC-

205

  and 

EC-217

 .

OK or NG

OK

>> GO TO 33.

NG

>> 1. Repair or replace.

2. GO TO 32.

BASIC SERVICE PROCEDURE

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32. 

ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC might be displayed.
Erase the stored memory in ECM and TCM. Refer to 

EC-60, "How to Erase DTC"

  and 

CVT-29, "OBD-II Diag-

nostic Trouble Code (DTC)"

 or 

CVT-30, "HOW TO ERASE DTC"

 .

>> GO TO 4.

33. 

CHECK ECM FUNCTION

1.

Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)

2.

Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to

BL-236, "ECM Re-communicating Function"

 .

>> GO TO 4.

VIN Registration

ABS00FAH

DESCRIPTION

VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.

NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).

OPERATION PROCEDURE

 With CONSULT-II

1.

Check the VIN of the vehicle and note it. Refer to 

GI-48, "IDENTIFICATION INFORMATION"

 .

2.

Turn ignition switch ON and engine stopped.

3.

Select “VIN REGISTRATION” in “WORK SUPPORT” mode.

4.

Follow the instruction of CONSULT-II display.

Accelerator Pedal Released Position Learning

ABS004AI

DESCRIPTION

Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.

OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch ON and wait at least 2 seconds.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON and wait at least 2 seconds.

5.

Turn ignition switch OFF and wait at least 10 seconds.

Throttle Valve Closed Position Learning

ABS004AJ

DESCRIPTION

Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.

PBIB2242E

EC-90

BASIC SERVICE PROCEDURE

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OPERATION PROCEDURE

1.

Make sure that accelerator pedal is fully released.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning

ABS004AK

DESCRIPTION

Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:

●

Each time electric throttle control actuator or ECM is replaced.

●

Idle speed or ignition timing is out of specification.

PREPARATION

Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.

●

Battery voltage: More than 12.9V (At idle)

●

Engine coolant temperature: 70 - 100

°

C (158 - 212

°

F)

●

PNP switch: ON

●

Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine
is start the headlamp will not be illuminated.

●

Steering wheel: Neutral (Straight-ahead position)

●

Vehicle speed: Stopped

●

Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “CVT”
system indicates less than 0.9V.
For models without CONSULT-II, drive vehicle for 10 minutes.

OPERATION PROCEDURE

 With CONSULT-II

1.

Perform 

EC-89, "Accelerator Pedal Released Position Learning"

 .

2.

Perform 

EC-89, "Throttle Valve Closed Position Learning"

 .

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

SEF217Z

BASIC SERVICE PROCEDURE

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6.

Touch “START” and wait 20 seconds.

7.

Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, Idle Air Volume Learning will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the DIAGNOSTIC PROCEDURE below.

8.

Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.

 Without CONSULT-II

NOTE:

●

It is better to count the time accurately with a clock.

●

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

1.

Perform 

EC-89, "Accelerator Pedal Released Position Learning"

 .

2.

Perform 

EC-89, "Throttle Valve Closed Position Learning"

 .

3.

Start engine and warm it up to normal operating temperature.

4.

Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

7.

Repeat the following procedure quickly five times within 5 seconds.

a.

Fully depress the accelerator pedal.

b.

Fully release the accelerator pedal.

8.

Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.

9.

Fully release the accelerator pedal within 3 seconds after the MIL turned ON.

10. Start engine and let it idle.

11. Wait 20 seconds.

12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the

specifications.

SEF454Y

ITEM

SPECIFICATION

Idle speed

650 

±

 50 rpm (in P or N position)

Ignition timing

15 

±

 5

°

 BTDC (in P or N position)

MBIB0238E

SEC897C

EC-92

BASIC SERVICE PROCEDURE

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13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried

out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as follows:
1.

Check that throttle valve is fully closed.

2.

Check PCV valve operation.

3.

Check that downstream of throttle valve is free from air leakage.

4.

When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident. 
It is useful to perform 

EC-147, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

5.

If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:

●

Engine stalls.

●

Erroneous idle.

Fuel Pressure Check

ABS004AL

FUEL PRESSURE RELEASE

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.

3.

Start engine.

4.

After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.

5.

Turn ignition switch OFF.

 Without CONSULT-II

1.

Remove fuel pump fuse located in IPDM E/R.

2.

Start engine.

3.

After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.

4.

Turn ignition switch OFF.

5.

Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

CAUTION:

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

NOTE:

●

Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel
pressure cannot be completely released because Z50 models do not have fuel return system.

●

Use Fuel Pressure Gauge Kit (J-44321) to check fuel pressure.

ITEM

SPECIFICATION

Idle speed

650

±

50 rpm (in P or N position)

Ignition timing

15

±

5

°

 BTDC (in P or N position)

SEF214Y

PBIB2087E

BASIC SERVICE PROCEDURE

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1.

Release fuel pressure to zero. Refer to 

EC-92, "FUEL PRESSURE RELEASE"

 .

2.

Install the inline fuel quick disconnected fitting between fuel
damper and injector tube.

3.

Connect the fuel pressure test gauge (quick connector adapter
hose) to the inline fuel quick disconnected fitting.

4.

Turn ignition switch ON and check for fuel leakage.

5.

Start engine and check for fuel leakage.

6.

Read the indication of fuel pressure gauge.

7.

If result is unsatisfactory, go to next step.

8.

Check the following.

●

Fuel hoses and fuel tubes for clogging

●

Fuel filter for clogging

●

Fuel pump

●

Fuel pressure regulator for clogging

If OK, replace fuel pressure regulator.
If NG, repair or replace.

At idling:

Approximately 350 kPa (3.57 kg/cm

2

 , 51 psi)

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TROUBLE DIAGNOSIS

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Trouble Diagnosis Introduction

ABS004AS

INTRODUCTION

The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.

It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.

A visual check only may not find the cause of the incidents. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on 

EC-95

 .

Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on 

EC-99

   should be used.

Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.

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WORK FLOW
Overall Sequence

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Detailed Flow

1. 

GET INFORMATION FOR SYMPTOM

Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the 

EC-98, "DIAGNOSTIC WORKSHEET"

 .

>> GO TO 2.

2. 

CHECK DTC*

1

1.

Check DTC*

1

 .

2.

Perform the following procedure if DTC*

1

  is displayed.

–

Record DTC*

1

  and freeze frame data*

2

 . (Print them out with CONSULT-II or GST.)

–

Erase DTC*

1

 . (Refer to 

EC-60, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

.)

–

Study the relationship between the cause detected by DTC*

1

  and the symptom described by the cus-

tomer. (Symptom Matrix Chart is useful. Refer to 

EC-103, "Symptom Matrix Chart"

 .)

3.

Check related service bulletins for information.

Is any symptom described and any DTC detected?

Symptom is described, DTC*

1

  is displayed>>GO TO 3.

Symptom is described, DTC*

1

  is not displayed>>GO TO 4.

Symptom is not described, DTC*

1

  is displayed>>GO TO 5.

3. 

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.

4. 

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.

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5. 

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC Confirmation Procedure for the displayed DTC*

1

 , and then make sure that DTC*

1

  is detected

again.
At this time, always connect CONSULT-II to the vehicle, and check diagnostic results in real time on “DATA
MONITOR (AUTO TRIG)”.
If two or more DTCs*

1

  are detected, refer to 

EC-100, "DTC Inspection Priority Chart"

  and determine trouble

diagnosis order.
NOTE:

●

Freeze frame data*

2

  is useful if the DTC*

1

  is not detected.

●

Perform Overall Function Check if DTC Confirmation Procedure is not included on Service Manual. This
simplified check procedure is an effective alternative though DTC*

1

  cannot be detected during this check.

If the result of Overall Function Check is NG, it is the same as the detection of DTC*

1

  by DTC Confirma-

tion Procedure.

Is DTC*

1

  detected?

Yes

>> GO TO 10.

No

>> Check according to 

EC-157, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

6. 

PERFORM BASIC INSPECTION

Perform 

EC-70, "Basic Inspection"

 .

With CONSULT-II>>GO TO 7.
Without CONSULT-II>>GO TO 9.

7. 

PERFORM DATA MONITOR (SPEC) MODE

 With CONSULT-II

Make sure that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F
ALPHA-B1”, “A/F ALPHA-B2” are within the SP value using CON-
SULT-II “DATA MONITOR (SPEC)” mode. Refer to 

EC-148, "Diag-

nostic Procedure"

 .

Are they within the SP value?

Yes

>> GO TO 9.

No

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Detect malfunctioning part according to 

EC-147, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

Is malfunctioning part detected?

Yes

>> GO TO 11.

No

>> GO TO 9.

9. 

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART

Detect malfunctioning system according to 

EC-103, "Symptom Matrix Chart"

  based on the confirmed symp-

tom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 10.

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10. 

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.

NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in 

GI-

27, "How to Perform Efficient Diagnosis for an Electrical Incident"

 .

Is malfunctioning part detected?

Yes

>> GO TO 11.

No

>> Monitor input data from related sensors or check voltage of related ECM terminals using CON-

SULT-II. Refer to 

EC-142, "CONSULT-II Reference Value in Data Monitor"

 , 

EC-116, "ECM Termi-

nals and Reference Value"

 .

11. 

REPAIR OR REPLACE THE MALFUNCTIONING PART

1.

Repair or replace the malfunctioning part.

2.

Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.

3.

Check DTC. If DTC is displayed, erase it, refer to 

EC-60, "HOW TO ERASE EMISSION-RELATED DIAG-

NOSTIC INFORMATION"

 .

>> GO TO 12.

12. 

FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then make sure that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure
that the symptom is not detected.

OK or NG

NG (DTC*

1

  is detected)>>GO TO 10.

NG (Symptom remains)>>GO TO 6.
OK

>> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC*

1

  in ECM

and TCM (Transmission Control Module). (Refer to 

EC-60, "HOW TO ERASE EMISSION-

RELATED DIAGNOSTIC INFORMATION"

  and 

CVT-30, "HOW TO ERASE DTC"

 .)

2. If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer to 

EC-

57, "Driving Pattern"

 .

3. INSPECTION END

*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.

DIAGNOSTIC WORKSHEET
Description

There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about a incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.
Some conditions may cause the MIL to come on steady or blink and
DTC to be detected. Examples:

●

Vehicle ran out of fuel, which caused the engine to misfire.

●

Fuel filler cap was left off or incorrectly screwed on, allowing fuel
to evaporate into the atmosphere.

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