DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION PFP:16119
A
Description EBS00O9I
NOTE:
If DTC P1122 is displayed with DTC P1121 or 1126, first perform the trouble diagnosis for DTC P1121 or EC
P1126. Refer to EC-285 or EC-293 .
Electric throttle control actuator consists of throttle control motor, 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- C
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
D
On Board Diagnosis Logic EBS00O9J
This self-diagnosis has the one trip detection logic.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
E
● Harness or connectors
P1122 Electric throttle control Electric throttle control function does not (Throttle control motor circuit is open or
1122 performance operate properly. shorted.) F
● Electric throttle control actuator
FAIL-SAFE MODE G
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
Engine operating condition in fail-safe mode
H
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
DTC Confirmation Procedure EBS00O9K I
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. J
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V when engine
is running. K
WITH CONSULT-II
1. Turn ignition switch ON and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II. L
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-289, "Diagnostic Procedure" .
M
SEF058Y
WITH GST
Follow the procedure “WITH CONSULT-II” above.
EC-287
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
Wiring Diagram EBS00O9L
MBWA1411E
EC-288
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II. A
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. EC
TER-
WIRE
MINAL ITEM CONDITION DATA (DC Voltage)
COLOR
NO.
C
Throttle control motor relay BATTERY VOLTAGE
3 LG [Ignition switch ON]
power supply (11 - 14V)
0 - 14V D
[Ignition switch ON]
● Engine stopped
Throttle control motor
4 L ● Shift lever position: D (A/T models) E
(Close)
● Shift lever position: 1st (M/T models)
● Accelerator pedal: Fully released
PBIB0534E F
0 - 14V
[Ignition switch ON]
● Engine stopped G
Throttle control motor
5 P ● Shift lever position: D (A/T models)
(Open)
● Shift lever position: 1st (M/T models)
● Accelerator pedal: Fully depressed H
PBIB0533E
BATTERY VOLTAGE
[Ignition switch OFF] I
104 G Throttle control motor relay (11 - 14V)
[Ignition switch ON] 0 - 1.0V
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) J
Diagnostic Procedure EBS00O9M
1. CHECK GROUND CONNECTIONS K
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
L
MBIB1403E
Refer to EC-131, "Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
EC-289
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
2. CHECK THROTTLE CONTROL MOTOR RELAY SIGNAL CIRCUIT-I
Check voltage between ECM terminal 3 and ground under the fol-
lowing conditions with CONSULT-II or tester.
Ignition switch Voltage
OFF Approximately 0V
Battery voltage
ON
(11 - 14V)
OK or NG
OK >> GO TO 10.
NG >> GO TO 3. MBIB0028E
3. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E14.
4. Check harness continuity between ECM terminal 3 and IPDM E/R terminal 28.
Refer to Wiring Diagram.
Continuity should exist.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
● Harness connectors E50, F1 (A/T models)
● Harness connectors E65, F40 (M/T models)
● IPDM E/R harness connector E14
● Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Reconnect all harness connectors disconnected.
2. Check voltage between ECM terminal 104 and ground with
CONSULT-II or tester.
Voltage: Battery voltage
OK or NG
OK >> GO TO 9.
NG >> GO TO 6.
PBIB1171E
EC-290
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
6. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II A
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E17.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 70. EC
Refer to Wiring Diagram.
Continuity should exist.
C
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8. D
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART E
Check the following.
● IPDM E/R harness connector E17
F
● Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors. G
8. CHECK FUSE
1. Disconnect 20A fuse. H
2. Check 20A fuse for blown.
OK or NG
OK >> GO TO 9. I
NG >> Replace 20A fuse.
9. CHECK INTERMITTENT INCIDENT J
Refer to EC-125, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG K
OK >> Replace IPDM E/R. Refer to PG-19, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness or connectors.
L
10. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1. Turn ignition switch OFF. M
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.
Electric throttle control
ECM terminal Continuity
actuator terminal
5 Should not exist
3
4 Should exist
5 Should exist MBIB0308E
6
4 Should not exist
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> Repair or replace.
EC-291
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
[CR (WITH EURO-OBD)]
11. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and
the housing.
OK or NG
OK >> GO TO 12.
NG >> Remove the foreign matter and clean the electric throttle
control actuator inside.
MBIB0307E
12. CHECK THROTTLE CONTROL MOTOR
Refer to EC-292, "Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> GO TO 14.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-125, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 14.
NG >> Repair or replace harness or connectors.
14. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-49, "Throttle Valve Closed Position Learning" .
3. Perform EC-49, "Idle Air Volume Learning" .
>> INSPECTION END
Component Inspection EBS00O9N
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
2. Check resistance between terminals 3 and 6.
Resistance: Approximately 1 - 15 Ω [at 25 °C (77°F)]
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-49, "Throttle Valve Closed Position Learning" .
5. Perform EC-49, "Idle Air Volume Learning" .
PBIB0095E
Removal and Installation EBS00O9O
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-18, "AIR CLEANER AND AIR DUCT" .
EC-292
