![[Previous]](../../../buttons/fprev.png)
![[Next]](../../../buttons/fnext.png)
DTC P2138: Accelerator
Pedal Position Sensor (main and sub) Range/Performance Problem
ACCELERATOR PEDAL POSITION SENSOR (main and sub) RANGE/PERFORMANCE PROBLEM CIRCUIT
- Refer to DTC P2122 - Accelerator Pedal Position
Sensor (main) Circuit Low Input
.
- Refer to DTC P2127 - Accelerator Pedal Position Sensor (sub) Circuit
Low Input .
CIRCUIT OPERATION
- Refer to DTC P2122 - Accelerator Pedal Position
Sensor (main) Circuit Low Input .
- Refer to DTC P2127 - Accelerator Pedal Position Sensor (sub) Circuit
Low Input .
TECHNICAL DESCRIPTION
- ECM checks the accelerator pedal position sensor output
signal characteristics for abnormal conditions.
DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between accelerator
pedal position sensor (main) and accelerator pedal position sensor (sub) is wrong.
MONITOR EXECUTION
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory
for the item monitored below)
Sensor (The sensor below is determined to be normal)
DTC SET CONDITIONS <Range/Performance problem -relation
between main and sub>
Logic Flow Chart
Check Conditions
- Change of accelerator pedal position sensor (sub) output voltage per 25 milliseconds
is lower than 0.06 volt.
Judgement Criterion
- Voltage obtained with the formula given below is 0.4 volt or higher for 0.3 second: [accelerator pedal
position sensor (sub) voltage - accelerator pedal position sensor (main) voltage].
| note |
The accelerator pedal position sensor voltage used for the judgement is converted into the
accelerator pedal position sensor voltage for the internal processing by the ECM.
|
DTC SET CONDITIONS <Range/Performance problem -relation
between main and sub>
Logic Flow Chart
Check Conditions
- Change of accelerator pedal position sensor (sub) output voltage per 25 milliseconds
is lower than 0.06 volt.
Judgement Criterion
- Voltage obtained with the formula given below is 0.4 volt or higher for 0.2 second: [accelerator pedal
position sensor (main) voltage - accelerator pedal position sensor (sub) voltage].
| note |
The accelerator pedal position sensor voltage used for the judgement is converted into the
accelerator pedal position sensor voltage for the internal processing by the ECM.
|
OBD-II DRIVE CYCLE PATTERN
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Accelerator pedal position sensor failed.
- Harness damage in accelerator pedal position sensor circuit or connector damage.
- ECM failed.
|
|
Required Special Tools:
- MB991958: Scan tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A
|
|
|
STEP 1. Check harness connector C-123 at accelerator pedal
position sensor for damage.
|
|
|
Q.
Is the harness connector in good condition?
|
|
|
 Go to Step 2.
|
|
|
|
|
|
 Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 16.
|
|
|
|
|
|
STEP 2. Check the continuity at accelerator pedal position sensor
harness side connector C-123.
|
|
|
(1)Disconnect the connector C-123 and measure at the harness side.
|
|
(2)Measure the continuity between terminal No. 2 and ground.
Q.
Does continuity exist?
Go to Step 6.
Go to Step 3.
|
|
|
STEP 3. Check harness connector B-109 at ECM for damage.
|
|
|
Q.
Is the harness connector in good condition?
|
|
|
Go to Step 4.
|
|
|
|
|
|
Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 16.
|
|
|
|
|
|
STEP 4. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 2) and ECM connector B-109 (terminal No. 76).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 5.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 5. Using scan tool MB991958, read the diagnostic trouble code
(DTC).
|
|
| caution |
To prevent damage to scan tool MB991958, always turn the ignition switch to
the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
|
(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)After the DTC has been deleted, read the DTC again.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is DTC P2138 set?
Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 16.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
|
|
|
STEP 6. Check the continuity at accelerator pedal position sensor
harness side connector C-123.
|
|
|
(1)Disconnect the connector C-123 and measure at the harness side.
|
|
(2)Measure the continuity between terminal No. 5 and ground.
Q.
Does continuity exist?
Go to Step 10.
Go to Step 7.
|
|
|
STEP 7. Check harness connector B-109 at ECM for damage.
|
|
|
Q.
Is the harness connector in good condition?
|
|
|
Go to Step 8.
|
|
|
|
|
|
Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 16.
|
|
|
|
|
|
STEP 8. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 5) and ECM connector B-109 (terminal No. 79).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 9.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 9. Using scan tool MB991958, read the diagnostic trouble code
(DTC).
|
|
| caution |
To prevent damage to scan tool MB991958, always turn the ignition switch to
the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
|
(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)After the DTC has been deleted, read the DTC again.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is DTC P2138 set?
Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 16.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
|
|
|
STEP 10. Check harness connector B-109 at ECM for damage.
|
|
|
Q.
Is the harness connector in good condition?
|
|
|
Go to Step 11.
|
|
|
|
|
|
Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 16.
|
|
|
|
|
|
STEP 11. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 1) and ECM connector B-109 (terminal No. 75).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 12.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 12. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 4) and ECM connector B-109 (terminal No. 78).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 13.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 13. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 3) and ECM connector B-109 (terminal No. 74).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 14.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 14. Check for harness damage between accelerator pedal position
sensor connector C-123 (terminal No. 6) and ECM connector B-109 (terminal No. 77).
|
|
|
Q.
Is the harness wire in good condition?
|
|
|
Go to Step 15.
|
|
|
|
|
|
Repair it. Then go to Step 16.
|
|
|
|
|
|
STEP 15. Replace the accelerator pedal position sensor.
|
|
|
(1)Replace the accelerator pedal position sensor.
|
|
|
(2)Turn the ignition switch to the "ON" position.
|
|
|
(3)After the DTC has been deleted, read the DTC again.
|
|
|
(4)Turn the ignition switch to the "LOCK" (OFF) position.
|
|
|
Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 16.
|
|
|
|
|
|
The inspection is complete.
|
|
|
|
|
|
STEP 16. Using scan tool MB991958, read the diagnostic trouble code
(DTC).
|
|
| caution |
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.
|
(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)After the DTC has been deleted, read the DTC again.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is DTC P2138 set?
Retry the troubleshooting.
The inspection is complete.
|
)
)
)
)
)
)
)