P0222-THROTTLE POSITION SENSOR 2 CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The PCM detects that the Throttle Position Sensor 2 input voltage is below the minimum acceptable value.

Possible Causes

INTERMITTENT DTC

(F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND

(K122) TP SIGNAL 2 CIRCUIT SHORTED TO GROUND

(F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K922) TP SENSOR GROUND CIRCUIT

(K122) TP SIGNAL 2 CIRCUIT SHORTED TO (K922) TP SENSOR GROUND CIRCUIT

(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K124) ETC MOTOR (+) CIRCUIT

(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT

(F855) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

(K122) TP SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE

THROTTLE BODY

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Diagnostic Test

1.DTC IS ACTIVE

NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

Is the status Active for this DTC?

Yes

Go to 2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(F855) 5 VOLT SUPPLY CIRCUIT VOLTAGE

Is the voltage above 4.5 volts?

Yes

Go to 6

Go to 3

3.(F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go to 4

Repair the (F855) 5 Volt Supply circuit for a short to ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

4.(F855) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K922) TP SENSOR GROUND CIRCUIT

Is the resistance above 100 ohms?

Yes

Go to 5

Repair the (F855) 5 Volt Supply circuit for a short to the (K922) TP Sensor Ground circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

5.(F855) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 12

Repair the (F855) 5 Volt Supply circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

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

Is the resistance above 100 ohms?

Yes

Go to 7

Repair the (K122) TP Signal 2 circuit for a short to ground.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

7.(K122) TP SIGNAL 2 CIRCUIT SHORTED TO (K922) TP SENSOR GROUND CIRCUIT

Is the resistance above 100 ohms?

Yes

Go to 8

Repair the (K122) TP Signal 2 circuit for a short to the (K922) TP Sensor Ground circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

8.(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K124) ETC MOTOR (+) CIRCUIT

Is the resistance below 100 ohms?

Yes

Repair the (K124) ETC Motor (+) circuit for a short to the (F855) 5 Volt Supply circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 9

9.(K122) TP SIGNAL 2 CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT

Is the resistance below 100 ohms?

Yes

Repair the (K122) TP Signal 2 circuit for a short to the (K126) ETC Motor (-) circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 10

10.(K122) TP SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 11

Repair the (K122) TP Signal 2 circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

11.THROTTLE BODY

Is the voltage above 4.5 volts with the jumper wire in place?

Yes

Replace the Throttle Body in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 12

12.POWERTRAIN CONTROL MODULE (PCM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).