P2135

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

CAUTION: If DTC P2135 has been set, TCL related DTC U1120 is also set. After P2135 has been diagnosed, don't forget to erase DTC U1120.

Throttle Position Sensor (main) Circuit:

Throttle Position Sensor (sub) Circuit:

THROTTLE POSITION SENSOR (MAIN AND SUB) RANGE/PERFORMANCE PROBLEM CIRCUIT

CIRCUIT OPERATION
- A 5-volt power supply is applied on the throttle position sensor (main) power terminal (terminal No. 5) from the ECM or the PCM (terminal No. 94).
The ground terminal (terminal No. 3) is grounded with ECM or PCM (terminal No. 95).
- A 5-volt power supply is applied on the throttle position sensor (sub) power terminal (terminal No. 5) from the ECM or the PCM (terminal No. 94).
The ground terminal (terminal No. 3) is grounded with ECM or PCM (terminal No. 95).

TECHNICAL DESCRIPTION
- ECM or PCM 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)
- Mass airflow sensor

DTC SET CONDITIONS

Logic Flow Chart:

Logic Flow Chart

Check Conditions
- Ignition switch is "ON" position.
- Throttle position sensor (main) output voltage is between 0.35 and 2.5 volts.
- Throttle position sensor (sub) output voltage is between 2.25 and 4.8 volts.

Judgement Criterion
- Voltage obtained with the formula given below is 0.3 volt or higher for 0.5 second: throttle position sensor (main) output voltage - [throttle position sensor (sub) output voltage - 2 volts]

Logic Flow Chart:

Logic Flow Chart

Check Conditions
- Ignition switch is "ON" position.
- Throttle position sensor (main) output voltage is between 2.5 and 4.8 volts.
- Throttle position sensor (sub) output voltage is higher than 2.25 volts.

Judgement Criterion
- Throttle position sensor (sub) output voltage is 4.2 volts or lower.

OBD-II DRIVE CYCLE PATTERN
None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are)
- Throttle position sensor failed.
- Shorted throttle position sensor circuit or connector damage.
- ECM failed.
- PCM 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-06 at throttle position sensor and harness connector B-21 at ECM or PCM for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 2.

NO: Repair or replace it. Then go to Step 5.

STEP 2. Check for short circuit to ground between throttle position sensor connector B-06 (terminal No. 6) and ECM or PCM connector B-21 (terminal No. 98).

Q: Is the harness wire in good condition?

YES: Go to Step 3.

NO: Repair it. Then go to Step 5.

STEP 3. Check for short circuit to ground between throttle position sensor connector B-06 (terminal No. 4) and ECM or PCM connector B-21 (terminal No. 99).

Q: Is the harness wire in good condition?

YES: Go to Step 4.

NO: Repair it. Then go to Step 5.

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

Q: Is DTC P2135 set?

YES: Replace the ECM or the PCM. When the ECM or the PCM is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table. Then go to Step 5.

NO: The inspection is complete.

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. Turn the ignition switch to the "LOCK" (OFF) position.
6. Check the DTC.

Q: Is DTC P2135 set?

YES: Retry the troubleshooting.

NO: The inspection is complete.