P2135

DTC P2135: Throttle Position Sensor (main and sub) Range/Performance Problem

THROTTLE POSITION SENSOR (main and sub) RANGE/PERFORMANCE PROBLEM CIRCUIT

Throttle Position Sensor (Main) Circuit:

Throttle Position Sensor (SUB) Circuit:

CIRCUIT OPERATION

Throttle Position Sensor (main) Circuit Low Input
- A 5-volt power supply is applied on the throttle position sensor (main) power terminal (terminal No. 5) from the ECM (terminal No. 12).
- A voltage that is according to the throttle opening angle is sent to the ECM (terminal No. 10) from the throttle position sensor (main) output terminal (terminal No. 4).
- The ground terminal (terminal No. 3) is grounded with ECM (terminal No. 13).

Throttle Position Sensor (sub) Circuit Low Input
- A 5-volt power supply is applied on the throttle position sensor (sub) power terminal (terminal No. 5) from the ECM (terminal No. 12).
- A voltage that is according to the throttle opening angle is sent to the ECM (terminal No. 11) from the throttle position sensor (sub) output terminal (terminal No. 6).
- The ground terminal (terminal No. 3) is grounded with ECM (terminal No. 13).

TECHNICAL DESCRIPTION
- ECM checks the throttle position sensor output signal characteristics for abnormal conditions.

DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between throttle position sensor (main) and throttle position sensor (sub) is wrong.

MONITOR EXECUTION
Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable

Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS [Range/Performance problem-relation between main and sub>

Logic Flow Chart:

Check Conditions
- The target output voltage of the throttle position sensor is 0.9 volt or less.
- Throttle position sensor (main) output voltage is between 0.2 and 4.8 volts.
- Throttle position sensor (sub) output voltage is between 0.2 and 4.8 volts.
- Battery positive voltage is higher than 8.3 volts.

Judgement Criterion
- Voltage obtained with the formula given below is 0.3 volt or higher for 0.3 second: [throttle position sensor (main) voltage - throttle position sensor (sub) voltage]

NOTE: The throttle position sensor voltage used for the judgement is converted into the throttle 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
- Throttle position sensor (main) output voltage is between 0.2 and 4.8 volts.
- Throttle position sensor (sub) output voltage is between 0.2 and 4.8 volts.

Judgement Criterion
- For 0.3 second, the sum of the output voltage of the throttle position sensors (main) and (sub) is 4.5 V or less, or 5.5 V or more.

FAIL-SAFE AND BACKUP FUNCTION
- Throttle opening degree position is in default position.

OBD-II DRIVE CYCLE PATTERN
None

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Throttle position sensor failed.
- Harness damage in throttle position sensor circuit or connector damage.
- ECM failed.

DIAGNOSIS

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 B-11 at throttle position sensor for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 2.

NO : Repair or replace it. Refer to General (Electrical), Harness Connector Inspection. Then go to Step 11.

STEP 2. Check the continuity at throttle position sensor harness side connector B-11.

1. Disconnect the connector B-11 and measure at the harness side.

2. Measure the continuity between terminal No. 3 and ground.
- Continuity (2 ohms or less)

Q: Does continuity exist?

YES : Go to Step 6.

NO : Go to Step 3.

STEP 3. Check harness connector B-09 at ECM for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 4.

NO : Repair or replace it. Refer to General (Electrical), Harness Connector Inspection. Then go to Step 11.STEP 4. Check for harness damage between throttle position sensor connector B-11 (terminal No. 3) and ECM connector B-09 (terminal No. 13).

Q: Is the harness wire in good condition?

YES : Go to Step 5.

NO : Repair it. Then go to Step 11.

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. Erase the DTC.
4. Depress the accelerator pedal fully for a few seconds.
5. Check the DTC.
6. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P2135 set?

YES : Replace the ECM. When the ECM is replaced, register the ID code. Refer to Keyless Operation System (KOS), ID Code Registration Necessity Judgment Table [Vehicles with KOS> or Wireless Control Module, ID Codes Registration Judgment Table [Vehicles with WCM>. Then go to Step 11.

NO : It can be assumed that this malfunction is intermittent. Refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.

STEP 6. Check harness connector B-09 at ECM for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 7.

NO : Repair or replace it. Refer to General (Electrical), Harness Connector Inspection. Then go to Step 11.

STEP 7. Check for harness damage between throttle position sensor connector B-11 (terminal No. 5) and ECM connector B-09 (terminal No. 12).

Q: Is the harness wire in good condition?

YES : Go to Step 8.

NO : Repair it. Then go to Step 11.

STEP 8. Check for harness damage between throttle position sensor connector B-11 (terminal No. 4) and ECM connector B-09 (terminal No. 10).

Q: Is the harness wire in good condition?

YES : Go to Step 9.

NO : Repair it. Then go to Step 11.

STEP 9. Check for harness damage between throttle position sensor connector B-11 (terminal No. 6) and ECM connector B-09 (terminal No. 11).

Q: Is the harness wire in good condition?

YES : Go to Step 10.

NO : Repair it. Then go to Step 11.

STEP 10. Replace the throttle body assembly.

1. Replace the throttle body assembly.
2. Turn the ignition switch to the "ON" position.
3. Erase the DTC.
4. Depress the throttle fully for a few seconds.
5. Check the DTC.
6. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P2135 set?

YES : Replace the ECM. When the ECM is replaced,register the ID code. Refer to Keyless Operation System (KOS), ID Code Registration Necessity Judgment Table [Vehicles with KOS> or Wireless Control Module, ID Codes Registration Judgment Table [Vehicles with WCM>. Then go to Step 11.

NO : The inspection is complete.

STEP 11. Using scan tool MB991958, read the diagnostic trouble code (DTC).