Test AT: Fuel Injector Control Module (FICM) Circuit Fuel Delivery Error
PINPOINT TEST AT: FUEL INJECTOR CONTROL MODULE (FICM) CIRCUIT FUEL DELIVERY ERRORFlow Chart:
This pinpoint test is intended to diagnose the following:
- FICMM circuitry open
- FICMM circuitry short to ground
- crankshaft position (CKP) or camshaft position (CMP) signal noise
- powertrain control module (PCM)
FICM-C Connector
FICM-C Connector:
PCM Connector
PCM Connector:
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AT1 : PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODE (DTC) P2552
NOTE: If DTCs P2614 or P2617 are present, follow the DTC diagnosis for P2552.
- Retrieve and record all engine and transmission continuous DTCs.
- Record the freeze frame data.
- Are DTCs P0148 or P2552 present?
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AT2 : DIAGNOSTIC TROUBLE CODE (DTC) P2552
NOTE: Refer to the PCM and component connector pin numbers at the beginning of this pinpoint test
- Possible causes:
- FICMM line open
- FICMM line shorted to ground
- Ignition OFF.
- FICM_C connector disconnected.
- Ignition ON, engine OFF.
- Measure the voltage between:
- Is the voltage greater than 10.5 V?
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AT3 : CHECK THE FICMM CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- PCM connector disconnected.
- Measure the resistance between:
- Is the resistance greater than 10 kOhm?
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AT4 : CHECK THE FICMM CIRCUIT FOR AN OPEN
- Measure the resistance between:
- Is the resistance less than 5 Ohm?
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AT5 : DIAGNOSTIC TROUBLE CODE (DTC) P0148
- Possible causes:
- fuel quality
- crankshaft position (CKP) or camshaft position (CMP) signal noise
- Retrieve and record all engine and transmission DTCs.
- Is DTC P0148 present?
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AT6 : CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
