Infiniti F50. Manual - part 5

 

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Infiniti F50. Manual - part 5

 

 

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

ACS-13

[ASCD]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

FIG. 6

Fail-Safe System

EKS003OB

DESCRIPTION

When the fail-safe system senses a malfunction, it deactivates
ASCD operation. The SET indicator in the combination meter will
then flash.

TKWM0444E

PBIC0201E

ACS-14

[ASCD]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

MALFUNCTION DETECTION CONDITIONS

CONSULT-II Inspection Procedure

EKS003OC

1.

Turn ignition switch OFF.

2.

Connect CONSULT-II and CONSULT-ll CONVERTER to data
link connector.

3.

Turn ignition switch ON.

4.

Turn MAIN (CRUISE) switch ON.

5.

Touch START(NISSAN BASED VHCL) (on CONSULT-II dis-
play).

6.

Touch ASCD.
If “ASCD” is not indicated, go to 

GI-38, "CONSULT-II Data Link

Connector (DLC) Circuit"

 .

7.

Touch SELF-DIAG RESULTS.

Detection conditions

ASCD operation during malfunc-

tion detection

ASCD steering (RESUME/ACCEL, CANCEL, SET/COAST) switch is stuck.

Vacuum motor ground circuit or power circuit is open or shorted.

Air valve ground circuit or power circuit is open or shorted.

Release valve ground circuit or power circuit is open or shorted.

Vehicle speed sensor is faulty.

ASCD control unit internal circuit is malfunctioning.

ASCD is deactivated.

Vehicle speed memory is can-
celed.

ASCD brake switch or stop lamp switch is faulty.

ASCD is deactivated.

Vehicle speed memory is not 
canceled.

PBIC0202E

SKIA3098E

PEL041P

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

ACS-15

[ASCD]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

Self-diagnostic results are shown on display.
Refer to 

ACS-15, "CONSULT-II Self-diagnostic Results"

  table.

8.

Touch DATA MONITOR.

Touch START.

Data monitor results are shown on display.
Refer to 

ACS-16, "CONSULT-II Data Monitor"

  table.

For further information, read the CONSULT-II Operation Manual.

CONSULT-II Self-diagnostic Results

EKS003OD

PFA021B

PEL043P

PEL811S

Diagnostic item

Description

Repair/Check order

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

Even if no malfunction is indicated, further testing may be 
required as far as the customer complains.

POWER SUPPLY-VALVE

The power supply circuit for the ASCD pump is open. (An 
abnormally high voltage is entered.)

ASCD PUMP CIRCUIT CHECK 

ACS-24

VACUUM PUMP

The vacuum motor circuit is open or shorted. (An abnor-
mally high or low voltage is entered.)

ASCD PUMP CIRCUIT CHECK 

ACS-24

AIR VALVE

The air valve circuit is open or shorted. (An abnormally 
high or low voltage is entered.)

ASCD PUMP CIRCUIT CHECK 

ACS-24

RELEASE VALVE

The release valve circuit is open or shorted. (An abnor-
mally high or low voltage is entered.)

ASCD PUMP CIRCUIT CHECK 

ACS-24

VHCL SP·S/FAILSAFE

The vehicle speed sensor is malfunctioning.

VEHICLE SPEED SENSOR 
CHECK 

ACS-23

CONTROL UNIT

The ASCD control unit is malfunctioning.

Replace ASCD control unit

BRAKE SW/STOP/L SW

The brake switch or stop lamp switch circuit is malfunc-
tioning.

ASCD BRAKE/STOP LAMP 
SWITCH CHECK 

ACS-20

ACS-16

[ASCD]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

CONSULT-II Data Monitor

EKS003OE

COMMAND SW

The steering switch (SET/COAST switch, RESUME/
ACCEL switch or CANCEL switch) is malfunctioning.

ASCD STEERING SWITCH 
CHECK 

ACS-22

ECM

The ECM is malfunctioning.

ECM SIGNAL CHECK 

ACS-27

Diagnostic item

Description

Repair/Check order

Monitored item

Description

BRAKE SW

Indicates [ON/OFF] condition of the brake switch and park/neutral position relay.

AT OD MONITOR

Indicates [ON/OFF] condition of A/T O/D (shift solenoid valve A).

STOP LAMP SW

Indicates [ON/OFF] condition of the stop lamp switch.

MAIN SW

Indicates [ON/OFF] condition of MAIN (CRUISE) switch.

SET SW

Indicates [ON/OFF] condition of the SET switch.

RESUME/ACC SW

Indicates [ON/OFF] condition of the RESUME/ACCEL switch.

CANCEL SW

Indicates [ON/OFF] condition of the CANCEL.

VHCL SPEED SE

The present vehicle speed computed from the vehicle speed sensor signal is displayed.

SET VHCL SPD

The preset vehicle speed is displayed.

VACUUM PUMP

The operation time of the vacuum pump is displayed.

AIR VALVE

The operation time of the air valve is displayed.

PW SUP-VALVE

Indicates [ON/OFF] condition of the circuit for the air valve and the release valve.

CRUISE LAMP

Indicates [ON/OFF] condition of the set lamp.

MAIN LAMP

Indicates [ON/OFF] condition of cruise lamp.

A/T·OD CANCEL

Indicates [ON/OFF] condition of the OD cancel.

FAIL SAFE·LOW

The fail-safe (LOW) circuit function is displayed.

FAIL SAFE·SPD 

The fail-safe (SPEED) circuit function is displayed.

TCS MONITOR 

Indicates [ON/OFF] condition of TCS.

THRTL POS SEN

The voltage of throttle position sensor is displayed.

R/LORD ESTMT

The present road/load computed by ASCD control unit is displayed.

 

 

 

 

 

 

 

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