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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.
  1. DTC IS ACTIVE 
    WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
    NOTE: Diagnose and repair any Secondary Air system sensor signal or relay control circuit DTCs before proceeding with this procedure.
    1. Turn the ignition on.
    2. With the scan tool, select View DTCs and review the DTC environmental data for this DTC.

      Is the good trip counter greater than 0?

      Yes 

      No 

      • Go to step  2
  2. AIR INJECTION SYSTEM COMPONENT INSPECTION 
    WARNING: The normal operating temperature of the exhaust system is very high. Never work around or attempt to service any part of the exhaust system until it has cooled. Special care should be taken when working near any part of the exhaust system. The temperature rises to a high level after a short period of engine operating time.
    1. Turn the ignition off.
    2. Inspect the Secondary Air Pump Assembly, the Secondary Air Pump Valve and the connection tubes between them.
    3. Look for damage, leaks, or any condition that would limit or interfere with airflow between the components.
    4. Using the wiring diagram/schematic as a guide, inspect the wiring and electrical connectors at the Secondary Air Pump Assembly.
    5. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.

      Were any problems found?

      Yes 

      No 

      • Go to step  3
  3. (F343) FUSED MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 1: Checking Fused Main Relay Circuit
    GC0099892Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C1 Secondary Air Pump Assembly harness connector.
    3. Turn the ignition on.
    4. Using a 12-volt test light connected to ground, check the (F343) Fused Main Relay Output circuit in the C1 Secondary Air Pump Assembly 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  4

      No 

  4. (K157) MAF SENSOR SIGNAL CIRCUIT VOLTAGE 
    Fig 2: Checking MAF Sensor Signal Circuit
    GC0099925Courtesy of CHRYSLER LLC
    1. Turn the ignition on.
    2. Measure the voltage of the (K157) MAF Sensor Signal circuit in the C1 Secondary Air Pump Assembly harness connector.

      Is the voltage between 4.8 and 5.1 volts?

      Yes 

      • Go to step  5

      No 

      • Go to step  6
  5. (K957) MAF SENSOR GROUND CIRCUIT TEST 
    Fig 3: Checking MAF Sensor Ground Circuit
    GC0099926Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Using a 12-volt test light connected to 12 volts, check the (K957) MAF Sensor Ground circuit in the C1 Secondary Air Pump Assembly 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  10

      No 

      • Go to step  9
  6. (K157) MAF SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE 
    Fig 4: Checking MAF Sensor Signal Circuit
    GC0099925Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Powertrain Control Module (PCM) harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (K157) MAF Sensor Signal circuit in the C1 Secondary Air Pump Assembly harness connector.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  7
  7. (K157) MAF SENSOR SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 5: Checking MAF Sensor Signal Circuit
    GC0099927Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Measure the resistance between ground and the (K157) MAF Sensor Signal circuit in the C1 Secondary Air Pump Assembly harness connector.

      Is the resistance above 100 Ohms?

      Yes 

      • Go to step  8

      No 

  8. (K157) MAF SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 6: Checking MAF Sensor Signal Circuit
    GC0099928Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K157) MAF Sensor Signal circuit between the C1 Secondary Air Pump Assembly harness connector and the PCM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  11

      No 

  9. (K957) MAF SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 7: Checking MAF Sensor Ground Circuit
    GC0099929Courtesy of CHRYSLER LLC
    NOTE: When checking circuits at the Powertrain Control Module (PCM), be careful not to damage or distort the connector terminals. Improper measurement technique could result in poor pin to terminal contact.
    1. Measure the resistance of the (K957) MAF Sensor Ground circuit between the C1 Secondary Air Pump Assembly harness connector and the PCM harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go to step  11

      No 

  10. SECONDARY AIR PUMP ASSEMBLY 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Secondary Air Pump Assembly and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Refer to any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

  11. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Secondary Air Pump Assembly and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related connectors.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

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