Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM2005MAGNUM V6-2.7L VIN RREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSCOMMUNICATIONS - VERBOSE CODESNO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE)
2005 Dodge and Ram Magnum V6-2.7L VIN R
No Response From PCM (Powertrain Control Module)
2005 Dodge and Ram Magnum V6-2.7L VIN RSECTION No Response From PCM (Powertrain Control Module)
NO RESPONSE FROM PCM
POSSIBLE CAUSES
- (A209) fused B(+) circuit open or shorted
- (Z904) ground circuit open
- (F202) fused ignition SW output circuit open or shorted
- (D65) CAN C BUS (+) circuit open
- (D64) CAN C BUS (-) circuit open
- Powertrain control module
DIAGNOSTIC TEST
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
With the scan tool, select ECU view.
NOTE:
- A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
- Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding.
Q: Does the scan tool display a red X next to the module?
YES: Go To 2
NO: The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2. (A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the PCM C1 harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
Q: Does the test light illuminate brightly?
YES: Go To 3
NO: Repair the (A209) Fused B(+) circuit for an open or short. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
3. (Z904) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check each (Z904) ground circuit.
Q: Does the test light illuminate brightly for each circuit?
YES: Go To 4
NO: Repair the (Z904) ground circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
4. (F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (F202) Fused Ignition Switch Output circuit.
Q: Does the test light illuminate brightly?
YES: Go To 5
NO: Repair the (F202) Fused Ignition Switch Output circuit for an open or short. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
5. (D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the FCM C1 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Q: Is resistance below 5.0 ohms?
YES: Go To 6
NO: Repair the (D65) CAN C Bus (+) circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
6. (D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Q: Is resistance below 5.0 ohms?
YES: Replace and program the Powertrain Control Module. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
NO: Repair the (D64) CAN C Bus (-) circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
No Response From PCM:
POSSIBLE CAUSES
- (A209) fused B(+) circuit open or shorted
- (Z904) ground circuit open
- (F202) fused ignition SW output circuit open or shorted
- (D65) CAN C BUS (+) circuit open
- (D64) CAN C BUS (-) circuit open
- Powertrain control module
DIAGNOSTIC TEST
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
With the scan tool, select ECU view.
NOTE:
- A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
- Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding.
Q: Does the scan tool display a red X next to the module?
YES: Go To 2
NO: The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2. (A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the PCM C1 harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.
Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
Q: Does the test light illuminate brightly?
YES: Go To 3
NO: Repair the (A209) Fused B(+) circuit for an open or short. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
3. (Z904) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check each (Z904) ground circuit.
Q: Does the test light illuminate brightly for each circuit?
YES: Go To 4
NO: Repair the (Z904) ground circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
4. (F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED
Turn the ignition on.
Using a 12-volt test light connected to ground, check the (F202) Fused Ignition Switch Output circuit.
Q: Does the test light illuminate brightly?
YES: Go To 5
NO: Repair the (F202) Fused Ignition Switch Output circuit for an open or short. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
5. (D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the FCM C1 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Q: Is resistance below 5.0 ohms?
YES: Go To 6
NO: Repair the (D65) CAN C Bus (+) circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
6. (D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between the FCM connector and the appropriate terminal of the special tool #8815.
Q: Is resistance below 5.0 ohms?
YES: Replace and program the Powertrain Control Module. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
NO: Repair the (D64) CAN C Bus (-) circuit for an open. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test - Ver 5
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.