Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) ACTIVE DTC
NOTE: If a 5-Volt supply DTC has also set, diagnose the 5-Volt DTC before continuing.

Ignition on, engine not running.

With a scan tool, read DTCs.

Is the DTC active at this time?

Yes
1. Go To 2).
No
1. Go To 7).
2) THROTTLE POSITION SENSOR
Turn the ignition off.

Disconnect the Throttle Body Assembly harness connector.

Ignition on, engine not running.

With the scan tool monitor the TP Sensor No.2 voltage.

Is the voltage below 0.5 volt?

Yes
1. Disconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, with the scan tool select the ETC RELEARN function.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go To 3).
3) (K122) TP SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

Fig 1: Checking Throttle Position Sensor 2 Signal Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the PCM harness connectors.

Ignition on, engine not running.

Measure the voltage on the (K122) TP Sensor No.2 Signal circuit at the Throttle Body harness connector.

Is the voltage above 5.2 volts?

Yes
1. Repair the short to battery voltage in the (K122) TP Sensor No.2 Signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go To 4).
4) (K122) TP SENSOR NO.2 SIGNAL CIRCUIT SHORTED TO (F855) 5-VOLT SUPPLY CIRCUIT

Fig 2: Checking Throttle Position Sensor 2 Signal Circuit & 5-Volt Supply Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance between the (K122) TP Sensor No.2 Signal circuit and the (F855) 5-volt Supply circuit at the Throttle Body harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the short between the (K122) TP Sensor No.2 Signal circuit and the (F855) 5-volt Supply circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go To 5).
5) (K922) SENSOR RETURN CIRCUIT OPEN

Fig 3: Checking TP Sensor Return Circuit Open Or High Resistance
Courtesy of DAIMLERCHRYSLER CORP.

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
1. Go To 6).
No
1. Repair the open in the (K922) Sensor Return circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
6) 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
1. Repair as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Replace and program the Powertrain Control Module per Service Information.
2. Perform POWERTRAIN VERIFICATION TEST .
7) THROTTLE FOLLOWER TEST
With the scan tool, perform the Throttle Follower Test.

Monitor the TP Sensor No.2 voltage while slowly pressing the Throttle pedal down.

Is there a smooth voltage change from high to low?

Yes
1. Refer to INTERMITTENT CONDITION .
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Disconnect the Battery when replacing the Throttle Body Assembly. Replace the Throttle Body Assembly. After installation is complete, with the scan tool select the ETC RELEARN function.
2. Perform POWERTRAIN VERIFICATION TEST .