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P2135






P2135-THROTTLE POSITION SENSOR 1/2 CORRELATION





For a complete wiring diagram refer to Diagrams/Electrical.


- When Monitored:

With the ignition on and no other DTCs present for TP Sensor No.1 or No.2.

- Set Condition:

PCM recognizes TP Sensors No.1 and No.2 are not coherent. One trip fault and the code will set within 5 seconds. ETC light is illuminated.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.


Diagnostic Test


1. ACTIVE DTC

NOTE: The throttle plate and linkage should be free from binding and carbon build up.

NOTE: Make sure the throttle plate is at the idle position.

Ignition on, engine not running.


NOTE: Inspect the engine for vacuum leaks.

With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

- Go To 2

No

- Go To 14


2. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE





Turn the ignition off.

Disconnect the C2 PCM harness connector.

Disconnect the Throttle Body harness connector.

Ignition on, engine not running.

Measure the voltage on the (K22) TP Signal 1 circuit in the Throttle Body harness connector.

Is the voltage above 0 volts?

Yes

- Repair the short to voltage in the (K22) TP Signal 1 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 3


3. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE





Measure the voltage on the (K122) TP Signal 2 circuit in the Throttle Body harness connector.

Is the voltage above 0 volts?

Yes

- Repair the short to voltage in the (K122) TP Signal 2 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 4


4. THROTTLE POSITION SENSOR









Turn the ignition off.

Connect the C2 PCM harness connector.

Ignition on, engine not running.

With a scan tool, monitor the TP Signal 1 and Signal 2 voltage.

Connect a jumper wire between the (K922) Sensor Return circuit and the (K22) TP Signal 1 circuit.

TP Sensor No.1 voltage should change from approximately 4.5 volts to 0.5 of a volt?

For TP Sensor No.2, connect a jumper wire between (F855) 5-volt supply circuit and the (K122) TP Signal 2 circuit.

TP Sensor No.2 voltage should change from approximately 0 volts to 5.0 volts?

Is the voltage reading within the listed specification with the jumper wire installed?

Yes

- Replace the Throttle Body Assembly.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 5
-
NOTE: Remove the jumper wire before continuing.


5. EXCESSIVE RESISTANCE IN THE (K22) TP SIGNAL 1 CIRCUIT





Turn the ignition off.

Disconnect the C2 PCM harness connector.


CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (K22) TP Signal 1 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms for each circuit?

Yes

- Go To 6

No

- Repair the excessive resistance in the (K22) TP Signal 1 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


6. EXCESSIVE RESISTANCE IN THE (K122) TP SIGNAL 2 CIRCUIT





Measure the resistance of the (K122) TP Signal 2 circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms for each circuit?

Yes

- Go To 7

No

- Repair the excessive resistance in the (K122) TP Signal 2 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


7. (K22) TP SIGNAL 1 CIRCUIT SHORTED TO GROUND





Measure the resistance between ground and the (K22) TP Signal 1 circuit at the Throttle Body harness connector.

Is the resistance below 100 ohms for each circuit?

Yes

- Repair the short to ground in the (K22) TP Signal 1 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 8


8. (K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND





Measure the resistance between ground and the (K122) TP Signal 2 circuit at the Throttle Body harness connector.

Is the resistance below 100 ohms for each circuit?

Yes

- Repair the short to ground in the (K122) TP Signal 2 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 9


9. EXCESSIVE RESISTANCE IN THE (F855) 5-volt SUPPLY CIRCUIT





CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (F855) 5-volt Supply circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

- Go To 10

No

- Repair the excessive resistance in the (F855) 5-volt Supply circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


10. (F855) 5-VOLT SUPPLY SHORTED TO GROUND





Measure the resistance between ground and the (F855) 5-volt Supply circuit at the Throttle Body harness connector.

Is the resistance below 100 ohms?

Yes

- Repair the short to ground in the (F855) 5-volt Supply circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 11


11. EXCESSIVE RESISTANCE IN THE (K922) SENSOR RETURN CIRCUIT





CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Measure the resistance of the (K922) Sensor Return circuit from the Throttle Body harness connector to the appropriate terminal of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

- Go To 12

No

- Repair the excessive resistance in the (K922) Sensor Return circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


12. (K22) TP SIGNAL 1 SHORTED TO (K122) TP SIGNAL 2





Measure the resistance between the (K22) TP Signal 1 circuit and the (K122) TP Signal 2 circuit at the Throttle Body harness connector.

Is the resistance below 5.0 ohms?

Yes

- Repair the short between the (K122) TP Signal 2 circuit and the (K22) TP Signal 1 circuit.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 13


13. PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


14. THROTTLE FOLLOWER TEST

Ignition on, engine not running.

With a scan tool, perform the ETC Throttle Follower Test and monitor the TP Sensor No.1 or No.2 voltage.

Slowly press the throttle pedal down.

The voltage for TP Sensor No.1 should start at approximately 0.8 of a volt and increase to above 4.2 volts.

The voltage for TP Sensor No.2 should start at approximately 4.2 volts and decrease to approximately 0.8 of a volt.

Is the voltage within the range of the listed specification for the appropriate Sensor?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

- Disconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test
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