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.
- ACTIVE DTC
- Turn the ignition on.
- With the scan tool, record all Freeze frame data.
- With the scan tool, erase DTCs.
- Turn the ignition off for 75 seconds.
- Turn the ignition on.
- With the scan tool, read DTCs.
Did the DTC reset?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
- CHECK THE (K386) EXHAUST TEMPERATURE SENSOR 1/3 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
- Turn the ignition off.
- Disconnect the Exhaust Temperature Sensor 1/3 harness connector.
- Turn the ignition on.
- Measure the voltage on the (K386) Exhaust Temperature Sensor 1/3 Signal circuit at the Exhaust Temperature Sensor 1/3 harness connector.
Is the voltage reading above 5.2 volts?
Yes
- Repair the (K386) Exhaust Temperature Sensor 1/3 Signal circuit for a short to voltage.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 3
- CHECK THE (K186) EXHAUST TEMPERATURE SENSOR 1/3 SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the PCM C2 harness connector.
- Measure the resistance of the (K386) Exhaust Temperature Sensor 1/3 Signal circuit between the Exhaust Temperature Sensor 1/3 harness connector and the PCM C2 harness connector.
Is the resistance above 5.0 Ohms?
Yes
- Repair the (K386) Exhaust Temperature Sensor 1/3 Signal circuit for an open or high resistance.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 4
- CHECK THE (K388) SENSOR GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE
- Measure the resistance of the (K388) Sensor ground circuit between the Exhaust Temperature Sensor 1/3 harness connector and the PCM C2 harness connector.
Is the resistance above 5.0 Ohms?
Yes
- Repair the (K388) Sensor ground circuit for an open or high resistance.
- Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
No
- Go To 5
- Measure the resistance of the (K388) Sensor ground circuit between the Exhaust Temperature Sensor 1/3 harness connector and the PCM C2 harness connector.
- EXHAUST TEMPERATURE SENSOR 1/3
- Replace the Exhaust Temperature Sensor 1/3 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 .