Infiniti F50. Manual — part 449
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-437
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
PFP:16119
Description
EBS00MHN
NOTE:
If DTC P1122 is displayed with DTC P1121 or 1126, first perform the trouble diagnosis for DTC P1121 or
P1126. Refer to
or
Electric Throttle Control Actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
On Board Diagnosis Logic
EBS00MHO
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
EBS00MHP
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V when engine
is running.
WITH CONSULT-II
1.
Turn ignition switch “ON” and wait at least 2 seconds.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for 5 seconds.
4.
EC-439, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1122
1122
Electric throttle control
performance problem
Electric throttle control function does not
operate properly.
●
Harness or connectors
(Throttle control motor circuit is open or shorted)
●
Electric throttle control actuator
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
SEF058Y
EC-438
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
Wiring Diagram
EBS00MHQ
TBWM0121E
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-439
C
D
E
F
G
H
I
J
K
L
M
A
EC
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
EBS00MHR
1.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch “OFF”
2.
Loosen and retighten engine ground screws.
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
26
OR
Throttle control motor relay
[Ignition switch “OFF”]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
0 - 1.0V
151
L/B
Throttle control motor
(Open)
[Ignition switch “ON”]
●
Engine stopped
●
Selector lever: “D”
●
Accelerator pedal is fully depressed
0 - 14V
153
B
Throttle control motor
ground
[Ignition switch “ON”]
Approximately 0V
154
L/W
Throttle control motor
(Close)
[Ignition switch “ON”]
●
Engine stopped
●
Selector lever: “D”
●
Accelerator pedal is released
0 - 14V
157
L
Throttle control motor relay
power supply
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
PBIB0058E
PBIB0061E
PBIB1118E
EC-440
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
2.
CHECK THROTTLE CONTROL MOTOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 153 and engine ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to power in harness or connectors.
3.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
1.
Disconnect throttle control motor relay harness connector.
2.
Check voltage between throttle control motor relay terminals 2, 3
and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
15A fuse
●
Harness for open or short between throttle control motor relay and battery
>> Repair or replace harness or connectors.
5.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check continuity between ECM terminal 157 and throttle control motor relay terminal 5.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
Continuity should exist.
PBIB0031E
Voltage: Battery voltage
PBIB0097E
Continuity should exist.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст