Diagnostic Test
WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
- DTC IS ACTIVE
- Ignition on, engine not running.
- With the scan tool, erase DTCs in the PCM.
- Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.
- Start the engine and let it run for two minutes.
- With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
- CHECK THE (K69) IAT 3 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Turn the engine off. Leave the ignition off.
- Disconnect the IAT Sensor 3 harness connector.
- Ignition on, engine not running.
- Measure the voltage on the (K69) IAT 3 Signal circuit at the IAT Sensor 3 harness connector.
Is the voltage above 5.2 Volts?
Yes
- Repair the (K69) Intake Air Temperature 3 Signal circuit for a short to voltage.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 3
- CHECK THE (K69) IAT 3 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the PCM C1 harness connector.
- Measure the resistance of the (K69) IAT 3 Signal circuit between the IAT Sensor 3 harness connector and the PCM C1 harness connector.
Is the resistance above 5.0 Ohms?
Yes
- Repair the (K69) Intake Air Temperature 3 Signal circuit for an open/high resistance.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 4
- CHECK THE (K64) RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE
- Measure the resistance of the (K64) Return circuit between the IAT Sensor 3 harness connector and the PCM C1 harness connector.
Is the resistance above 5.0 Ohms?
Yes
- Repair the (K64) Return circuit for an open/high resistance.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 5
- Measure the resistance of the (K64) Return circuit between the IAT Sensor 3 harness connector and the PCM C1 harness connector.
- IAT SENSOR 3
- Replace the Intake Air Temperature Sensor 3 in accordance with the service information.
- Turn the ignition on.
- With the scan tool, erase PCM DTCs.
- Perform several ignition key cycles leaving the ignition on for at least 10 seconds per cycle.
- Start the engine and let it run for two minutes.
- With the scan tool, read PCM DTCs.
Does the scan tool display this DTC?
Yes
- Replace the Powertrain Control Module in accordance with the service information. Refer to REMOVAL .
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Test complete.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .