Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.
1. Start the engine and allow it to reach normal operating temperature.
  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 may result in possible serious or fatal injury.
2. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go to step 2
  No
  - Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
(K343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE

Fig 1: Checking Fused Main Relay Output Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Fuel Injector 2 harness connector.
3. Turn the ignition on.
4. Using a 12 volt test light connected to ground, check the (K343) Fused Main Relay Output circuit in the Fuel Injector 2 harness connector.
  NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Is the test light illuminated and bright?
  
  Yes
  - Go to step 3
  No
  - Repair the (K343) Fused Main Relay Output circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K12) INJECTOR 2 CONTROL CIRCUIT SHORTED TO GROUND

Fig 2: Checking Injector Control Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module (PCM) connector.
3. Measure the resistance between ground and the (K12) Injector 2 Control circuit in the Fuel Injector 2 harness connector.
  Is the resistance above 100 ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the (K12) Injector 2 Control circuit for a short to ground.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(K12) INJECTOR 2 CONTROL CIRCUIT OPEN OR HIGH RESISTANCE

Fig 3: Checking Injector Control Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K12) Injector 2 Control circuit between the Fuel Injector 2 harness connector and the Powertrain Control Module (PCM) harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (K12) Injector 2 Control circuit for an open circuit or high resistance.
  - Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .

FUEL INJECTOR 2

Turn the ignition off.
Measure the resistance between the terminals of Fuel Injector 2.
NOTE: The resistance of the circuit will vary according to the temperature of the injector coil. Use the table below to determine the resistance range of the injector.

Is the resistance of the injector within the specified range?

Yes
- Go to step 6
No
- Replace Fuel Injector in accordance with the Service Information.
- Perform the PCM Verification Test. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure

Fuel Injector Coil Resistance Based on Engine Temperature
Temperature	Resistance
-20° C (-4° F)	10 ohms (+/-.6 ohms)
20° C (68° F)	12 ohms (+/-.6 ohms)
60° C (140° F)	14 ohms (+/-.6 ohms)
100° C (212° F)	16 ohms (+/-.6 ohms)

POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Fuel Injector 2 and the Powertrain Control Module (PCM).
- Look for any chafed, pierced, pinched, or partially broken wires.
- Look for broken, bent, pushed out or corroded terminals.
- Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
- Look for the data to change or for the DTC to reset during the wiggle test.
- Refer to any technical service bulletins that may apply.