Nissan Primera P11. Instruction — part 86

SYSTEM — Engine control module system

Malfunction

SYMPT

OM

Reference page

Feature of symptom

Check point

HARD/NO START/
RESTART (EXCP. HA)

ENGINE STALL

HESITATION/SURGING/FLAT SPOT

SPARK KNOCK/DETONATION

LACK OF POWER

POOR ACCELERATION

HI IDLE

LOW IDLE

ROUGH IDLE/HUNTING

IDLING VIBRATION

SLOW/NO RETURN TO IDLE

OVERHEAT/HIGH ENGINE COOLANT TEMPERATURE

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

ABNORMAL SMOKE COLOR

DEAD BATTERY (UNDER CHARGE)

Malfunction indicator illuminates.

Can be detected by CONSULT-II?

Fuel cut

NO START (with first firing)

NO START (without first firing)

HARD TO START WHEN ENGINE IS COLD

HARD TO START WHEN ENGINE IS HOT

AT IDLE

DURING DRIVING

WHEN DECELERATING

BLACK SMOKE

WHITE SMOKE

New

CT/CS

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

AP

HA

Engine control module

Start

signal

circuit

open,

short

qq

EC-CD-145

Start

control

does

not

function.

Air

conditioner

switch

circuit

open,

ground

short

EC-CD-126

Air

conditioner

does

not

stop

operating.

short

Air

conditioner

does

not

work.

Accelerator

position

switch

(Idle)

circuit

open,

ground

short

qq

q

q

q

EC-CD-108

short

qq

q

q

q

Accelerator

position

sensor

NG

signal

is

output.

Ignition

switch

circuit

(ON

signal)

open

q

qqq

EC-CD-59

short

Engine

does

not

stop.

Power

supply

for

ECM

circuit

open

qqq

EC-CD-59

short

qq

EGRC-solenoid

valve

circuit

open,

short

qq

EC-CD-129

ground

short

qq

q

Does

not

stop

operating.

Glow

relay

circuit

open

qqqq

q

q

q

EC-CD-1

18

Glow

lamp

does

not

turn

on.

short

qq

Glow

lamp

does

not

turn

of

f.

Engine

control

module

relay

(Self-

shutof

f)

circuit

open

qqq

q

EC-CD-59

short

qq

q

Ground

short

makes

engine

unable

to

stop.

Air

conditioner

relay

circuit

open

EC-CD-126

Air

conditioner

does

not

oper-

ate.

short

qq

Air

conditioner

does

not

stop

operating.

Brake

switch

circuits

open

q

EC-CD-136

short

q

ECM,

Connector

circuit

open,

short

qqqqqqqqqqqq

q

qqqqqqqqqqqq

EC-CD-86

TROUBLE DIAGNOSIS — General Description

CD20T

Symptom Matrix Chart (Cont’d)

EC-49

CONSULT-II Reference Value in Data Monitor
Mode

Remarks:

●

Specification data are reference values.

●

Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.

MONITOR ITEM

CONDITION

SPECIFICATION

CKPS

⋅

RPM (TDC)

●

Tachometer: Connect

●

Run engine and compare tachometer indication with the CONSULT-II value.

Almost the same speed as the CON-
SULT-II value.

CKPS

⋅

RPM-PUMP

COOLAN TEMP/S

●

Engine: After warming up

More than 70°C (158°F)

VHCL SPEED SE

●

Turn drive wheels and compare speedometer indication with the CON-
SULT-II value

Almost the same speed as
the CONSULT-II value

FUEL TEMP SEN

●

Engine: After warming up

More than 40°C (104 °F)

ACCEL POS SEN

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: release

Approx. 0.40V

Accelerator pedal: depress

Approx. 3.3V

OFF ACCEL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: release

ON

Accelerator pedal: slightly open

OFF

C/SLEEV POS/S

●

Engine: After warming up

Approx. 2.5V

BATTERY VOLT

●

Ignition switch: ON (Engine stopped)

11 - 14V

START SIGNAL

●

Ignition switch: ON

,

START

,

ON

OFF

,

ON

,

OFF

AIR COND SIG

●

Engine: After warming up, idle the
engine

Air conditioner switch: “OFF”

OFF

Air conditioner switch: “ON”
(Compressor operates.)

ON

IGN SW

●

Ignition switch: ON

,

OFF

ON

,

OFF

MAS AIR/FL SE

●

Engine: After warming up

●

Air conditioner switch: “OFF”

●

Shift lever: “N”

●

No-load

Idle

0.8 - 2.7V

2,000 rpm

2.2 - 2.8V

ACT INJ TIMG

●

Engine: After warming up

●

Air conditioner switch: “OFF”

●

Shift lever: “N”

●

No-load

●

At sea level

Idle

-0.5 to -1.5°

2,000 rpm

+2.5° to +3.5°

TARGET F/INJ

●

Engine: After warming up

●

Air conditioner switch: “OFF”

●

Shift lever: “N”

●

No-load

●

At sea level

Idle

8.0 - 8.8 mm

3

/stroke

2,000 rpm

Approx. 7.6 mm

3

/stroke

BRAKE SW

●

Ignition switch: ON

Brake pedal: released

OFF

Brake pedal: depressed

ON

BRAKE SW 2

●

Ignition switch: ON

Brake pedal: released

OFF

Brake pedal: depressed

ON

FUEL CUT S/V

●

Ignition switch: ON

,

OFF

ON

,

OFF

AIR COND RLY

●

Air conditioner switch: OFF

,

ON

OFF

,

ON

GLOW RLY

●

Refer to EC-CD-124.

COOLING FAN

●

When cooling fan is stopped.

OFF

●

When cooling fan operates at low speed.

LOW

●

When cooling fan operates at high speed.

HI

EGRC SOL/V A

●

Engine: After warming up

●

Air conditioner switch: “OFF”

●

Shift lever: “N”

●

No-load

●

At sea level

Idle

OFF

2,800 rpm

ON

TROUBLE DIAGNOSIS — General Description

CD20T

EC-50

Major Sensor Reference Graph in Data
Monitor Mode

The following are the major sensor reference graphs in “DATA MONITOR” mode.
(Select “HI SPEED” in “DATA MONITOR” with CONSULT-II.)

ACCEL POS SEN, C/SLEEV POS/S, ACT INJ TIMG

Below is the data for “ACCEL POS SEN”, “C/SLEEV POS/S” and “ACT INJ TIMG” when revving engine
quickly up to 3,000 rpm under no load after warming up engine sufficiently.
Each value is for reference, the exact value may vary.

NEF780

●

“ACCEL POS SEN” should increase
while depressing the accelerator
pedal and should decrease while
releasing it.

●

“C/SLEEV POS/S” should increase
when depressing the accelerator
pedal and should decrease when the pedal is
released.

●

“ACT INJ TIMG” should increase
when depressing the accelerator
pedal and should decrease when
the pedal is released.

ACT

INJ

TIMG

13:22

-00”09

+04”95

16:06

x0.1V

-00”09

+04”95

16:06

x0.1V

-00”09

+04”95

TROUBLE DIAGNOSIS — General Description

CD20T

EC-51

ECM Terminals and Reference Value

PREPARATION

The ECM is located beneath the heater unit. To access the ECM,
remove the center console under cover at the passenger side.
Perform all voltage measurements with all connectors con-
nected. Since the ECM harness connector cannot be accessed
from the backside, voltages should be measured by connecting
a break out box (SST) between ECM and ECM harness connec-
tor.

When measuring:

●

Use extreme care not to touch 2 pins at the same time.

●

Note that the data is for comparison and may not be exact.

●

Be sure ECM unit is properly grounded before checking.

SEF883Y

NEF162A

ECM

Y-adapter

Breakout box

Y-adapter

To ECM har-
ness connec-
tor

TROUBLE DIAGNOSIS — General Description

CD20T

EC-52