rentacop911

According to the owners manual if the MIL light comes on for 15 sec then flashes for 5 sec then stays on until the truck is started the emmision system IS NOT READY for testing....what's that mean vs. ready for testing? Is this something dodge is having dealerships do in order to prevent the MIL light from coming on every week?

vzdude

Fill out your sig. under the User CP in the left corner of the screen. That will help us answer your questions. You know, year, make, model, and any modifications you've done.

rentacop911

sorry about that......2007 6.7 quad cab shortbed 6 spd manual trans

vzdude

Never heard about the not ready for testing, but here is what the FSM has to say about it. Also...if you think there may be a code in the computer, you can check it by turning the key from off to the on position 3 times, ending in the on position. ( not cranking the engine ) The codes should appear in the odometer screen. it should be something like a P---- and then done if there are no more codes. No codes will just give you the done . Some people have said that on the 06-07's they have had to have the park brake on, so that may be required as well. Good luck.



OPERATION
The Malfunction Indicator Lamp (MIL) gives an indication to the vehicle operator when the Powertrain Control Module (PCM) on vehicles with a gasoline engine, or the Engine Control Module (ECM) on vehicles with a diesel engine has recorded a Diagnostic Trouble Code (DTC) for an On-Board Diagnostics II (OBDII) emissions-related circuit or component malfunction. The MIL is controlled by a transistor on the instrument cluster circuit board based upon cluster programming and electronic messages received by the cluster from the PCM or ECM over the Controller Area Network (CAN) data bus.

The MIL Light Emitting Diode (LED) is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the LED will always be OFF when the ignition switch is in any position except ON or START. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will turn ON the MIL for the following reasons:

Bulb Test - Each time the ignition switch is turned to the ON position the indicator is illuminated for about two seconds as a bulb test. The entire bulb test is a function of the PCM or ECM.
MIL Lamp-On Message - Each time the cluster receives an electronic MIL lamp-ON message from the PCM or ECM, the indicator will be illuminated. The indicator can be flashed ON and OFF, or illuminated solid, as dictated by the PCM or ECM message. For some DTCs, if a problem does not recur, the PCM or ECM will send a lamp-OFF message automatically. Other DTCs may require that a fault be repaired and the PCM or ECM be reset before a lamp-OFF message will be sent. For more information on the PCM, the ECM, and the DTC set and reset parameters, refer to Group 25 - EMISSIONS.
Communication Error - If the cluster receives no lamp-ON or lamp-OFF messages from the PCM or ECM for about 10 seconds, the MIL is illuminated by the instrument cluster to indicate a loss of bus communication. The indicator remains controlled and illuminated by the cluster until a valid message is received from the PCM or ECM.
Actuator Test - Each time the cluster is put through the actuator test, the MIL indicator will be turned ON during the bulb check portion of the test to confirm the functionality of the LED and the cluster control circuitry.
The PCM or ECM continually monitors the fuel and emissions system circuits and sensors to decide whether the system is in good operating condition. The PCM or ECM then sends the proper lamp-ON or lamp-OFF message to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN). For further diagnosis of the MIL or the instrument cluster circuitry that controls the LED, (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING) . If the EMIC turns ON the MIL after the bulb test, it may indicate that a malfunction has occurred and that the fuel and emissions systems may require service.

For proper diagnosis of the fuel and emissions systems, the PCM, the ECM, the EMIC, the CAN data bus or the electronic communication related to MIL operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

rentacop911

Thank you for getting back with me vzdude.....that was alot of good info..