Check engine light comes on and starts blinking when I accelerate but the car does not accelerate it shakes as it losses power
Chrysler Check Engine Light
DIAGNOSIS & TESTING
The Malfunction Indicator Lamp (MIL) is located on Instrument Panel Cluster (IPC). The MIL informs driver that an emission system fault has occurred and that engine control system requires service. The Engine Control Module (ECM) monitors MIL control circuit for conditions that are incorrect for commanded state of MIL. For example, a failure condition exists if ECM detects low voltage when MIL is commanded OFF, or high voltage when MIL is commanded ON.
Any MIL requesting DTCs that may be set should be diagnosed first.
- Understand and validate customer concern. Inspect visible system components for obvious damage or conditions that may cause concern.
- Inspect for related bulletins, recall/field actions and preliminary information.
- Verify symptom is not exclusively a mechanical concern.
- Connect a suitably programmed scan tool, perform Vehicle DTC Information function and verify at least one control module communicates with scan tool.
- Verify there are no control module Internal hardware performance DTCs set.
- Ignition ON, command MIL ON and OFF with scan tool. MIL should turn ON and OFF as commanded.
- Ignition ON, command MIL ON and OFF with a scan tool while observing following control circuit status parameters:
a. MIL control circuit low voltage test status.
b. MIL control circuit open test status.
c. MIL control circuit high voltage test status.
d. Each parameter should toggle between OK and Not Run or Not Run and OK. - Ignition OFF, disconnect MIL electrical harness connectors. Ignition ON, MIL should not illuminate. If MIL is illuminated, test MIL control circuit terminal for a short to ground. If circuit tests normal, replace cluster.
- Ignition ON, connect a 3A fused jumper wire between MIL control circuit terminal and ground. MIL should illuminate. If MIL does not illuminate, test MIL control circuit for a short to voltage, or an open/high resistance. If circuit tests normal, replace MIL bulb.
- If all circuits/connections test normal, replace ECM.