Nissan Quest E52. Manual - part 556

EC-434

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace malfunctioning ignition coil with power transistor. Refer to 

EM-52, "Exploded View"

.

Component Inspection (Ignition Coil with Power Transistor)

INFOID:0000000009651295

1.

CHECK IGNITION COIL WITH POWER TRANSISTOR-I

1.

Turn ignition switch OFF.

2.

Disconnect ignition coil harness connector.

3.

Check resistance between ignition coil terminals as per the following.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace malfunctioning ignition coil with power transistor. Refer to 

EM-52, "Exploded View"

.

2.

CHECK IGNITION COIL WITH POWER TRANSISTOR-II

CAUTION:

Perform the following procedure in a place with no combustible objects and good ventilation.
1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.

4.

Start engine.

5.

After engine stalls, crank it 2 or 3 times to release all fuel pressure.

6.

Turn ignition switch OFF.

7.

Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.

8.

Remove ignition coil and spark plug of the cylinder to be checked.

9.

Crank engine for 5 seconds or more to remove combustion gas in the cylinder.

10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -

0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.

12. Crank engine for approximately 3 seconds, and check whether

spark is generated between the spark plug and the grounded
metal portion.

CAUTION:

• During the operation, always stay 0.5 m (19.7 in) or more

away from the spark plug and the ignition coil. Be careful
not to get an electrical shock while checking, because the
electrical discharge voltage becomes 20 kV or more.

• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning ignition coil with power transistor. Refer to 

EM-52, "Exploded View"

.

Terminal No. (Polarity)

Resistance 

Ω

 [at 25

°

C (77

°

F)]

1 and 2

Except 0 or 

∞

1 and 3

Except 0

2 and 3

Spark should be generated.

JMBIA0066GB

IGNITION SIGNAL

EC-435

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Component Inspection (Condenser)

INFOID:0000000009651296

1.

CHECK CONDENSER

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Check resistance between condenser terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Terminals

Resistance

1 and 2

Above 1 M

Ω

 [at 25C

°

 (77C

°

)]

EC-436

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

INFORMATION DISPLAY (ASCD)

INFORMATION DISPLAY (ASCD)

Component Function Check

INFOID:0000000009888613

1.

CHECK INFORMATION DISPLAY

1.

Start engine.

2.

Press MAIN switch on ASCD steering switch.

3.

Drive the vehicle at more than 40 km/h (25 MPH).

CAUTION:

Always drive vehicle at a safe speed.

4.

Press SET/COAST switch.

5.

Check that the reading of the speedometer shows the same value as the set speed indicated in the infor-
mation display while driving the vehicle on a flat road.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-436, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009888614

1.

CHECK DTC

Check that DTC UXXXX, P0500 or P1574 is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO-1

>> Perform trouble diagnosis for DTC UXXXX.

NO-2

>> Perform trouble diagnosis for DTC P0500. Refer to 

EC-325, "DTC Logic"

.

NO-3

>> Perform trouble diagnosis for DTC P1574. Refer to 

EC-372, "DTC Logic"

.

2.

CHECK DTC WITH COMBINATION METER

Check combination meter function. Refer to 

MWI-35, "CONSULT Function"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble diagnosis for DTC indicated.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-93, "Removal and Installation"

.

NO

>> Repair or replace.

MALFUNCTION INDICATOR LAMP

EC-437

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

MALFUNCTION INDICATOR LAMP

Component Function Check

INFOID:0000000009651297

1.

CHECK MIL FUNCTION

1.

Turn ignition switch ON.

2.

Check that MIL illuminates.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-437, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009651298

1.

CHECK DTC

Check that DTC UXXXX is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX.

2.

CHECK COMBINATION METER FUNCTION

Check combination meter function. Refer to 

MWI-35, "CONSULT Function"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-93, "Exploded View"

.

NO

>> Repair or replace error-detected parts.