2006 Dodge Charger RT PCM Wiring Diagram Complete Electrical Guide

Start with locating pin 86 on connector C2–this is your ignition feed input. Trace the orange wire with a violet stripe (size 18 AWG) directly to the under-hood fuse block, specifically fuse 18 rated at 20 amps. If continuity fails, inspect the splice at S133, often corroded due to proximity to the brake master cylinder. Replace the splice using a crimp-and-seal connector, not solder, to prevent heat damage to adjacent sensor circuits.

For the throttle control module integration, focus on pins 23, 24, and 31 on the 60-way gray connector. These link to the ETC motor via a three-wire twisted pair: dark blue (reference), light blue (signal return), and gray (control feedback). Measure voltage at pin 23–should read 5V when ignition is on. If absent, probe the PCM’s internal voltage regulator, output labeled Vref, or check the ground path at G105 (chassis ground near strut tower).

Transmission control wiring centers on the 16-pin yellow connector (C1). Pin 6 delivers the torque converter clutch signal–a tan wire leading to the solenoid pack. Voltage here pulses between 0V and battery voltage at 30 Hz during gear engagement. Use an oscilloscope for verification; a multimeter will not capture the PWM pattern accurately. If absent, verify the transmission range sensor circuit first–ground reference at pin 16 must be uninterrupted.

Fuel pump relay activation depends on pin 87 of connector C3. The gray wire (size 14 AWG) carries a 12V command from the ECU. Test by manually jumping the relay socket (terminals 30 to 87) with ignition on–pump should prime for two seconds. If the pump runs continuously, inspect the inertia switch (located behind right rear quarter panel) for unintended tripping, or test the feedback circuit at pin 41 of the ECU (dark green wire).

For CAN bus diagnostics, concentrate on pins 2 and 3 of the OBD-II port. Both must read between 2.5V and 3.5V with the ignition on, indicating active differential signaling. If voltage is static at 0V or 5V, check terminator resistors at the ABS module and instrument cluster (both 120 ohms). Resistance outside 55-65 ohms suggests a short to ground or power along the bus network, typically near the firewall bulkhead connector.

Connecting Powertrain Control Electronics in a 2007 Muscle Sedan: Pinout Guide

Locate the 80-pin black connector behind the driver-side kick panel–terminals C1 and C3 supply ignition feed from the TIPM. Verify continuity between pin 54 (gray/light blue) and the instrument cluster; resistance should read below 0.5 ohms. If exceeding 2 ohms, strip ¼ inch insulation from the wiring harness near the firewall grommet and solder a 16-gauge jumper wire directly to the cluster connector’s backside.

Sensor Signal Pathways Requiring Immediate Attention

MAP sensor output flows through pin 27 (tan/black) on the PCM side; splice this line within 12 inches of the intake manifold using a weatherproof crimp connector rated for 300 VDC. Oxygen sensors pre-cat (#1 bank) terminate at pins 68 (dark green/white) and 70 (light blue/white)–probe these leads with a digital multimeter set to 0-1 VDC range while cranking; expected swing is 0.1-0.9 VDC. Replace any section showing steady 0.45 VDC or intermittent dropouts exceeding 0.2 seconds.

Throttle position wiring splits at the ECM harness: pin 22 (violet/orange) carries primary signal, while pin 21 (yellow/pink) feeds a redundant 5 VDC reference–both must share identical ground return at pin 1 (black/tan). Isolate corrosion on these strands by disconnecting the battery, removing the air intake tube, and spraying dielectric grease into each receptacle before reassembly. Forged copper lugs should crimp onto stripped conductors no thinner than 14 AWG to prevent voltage sag under wide-open throttle conditions.

Identifying the Engine Control Module Connector Terminals and Cable Hues for the 2006 Charger RT

Begin by securing the vehicle’s service manual or a verified electrical schematic–locate the section detailing the 5.7L HEMI powertrain’s central computer connectors. The primary connector, a 144-pin C1 harness, sits on the driver’s side firewall near the brake booster. Inspect the connector’s latch mechanism; press down firmly to release before gently wiggling the harness free. Avoid pulling wires individually–grasp the entire housing to prevent bending pins.

Use a multimeter set to continuity mode to verify each terminal’s function before proceeding. Below are key terminals and their corresponding wire colors for critical systems:

• Battery voltage supply (constant): Terminals C1-43 (dark green/red tracer) and C1-68 (fused, orange/black tracer). Both wires terminate at the under-hood fuse box–test for 12V+ with the ignition off.
• Ignition-switched voltage: Terminal C1-51 (pink/black tracer). Activates at key-on, feeds critical modules–expect 10-14V when the key is in the “ON” position.
• Sensor ground reference: Terminal C1-65 (black/light blue tracer). Provides a clean return path for oxygen sensors and MAP sensor–measure less than 0.5 ohms to chassis ground.
• Throttle position signal: Terminal C1-99 (yellow/black tracer). Outputs a 0.5-4.5V linear signal–verify against the TPS sensor while slowly depressing the accelerator.
• Injector control outputs: Cylinders 1-4 (C1-100 to C1-103) use purple/violet tracers; cylinders 5-8 (C1-104 to C1-107) use dark blue/yellow tracers. Each wire should pulse at 1-2ms intervals during idle when scoped or tested with a noid light.

Trace the C2 connector–an 80-pin harness linked to powertrain actuators–for these additional signals:

• Camshaft position input: Terminal C2-31 (gray/dark green tracer). Delivers a 5V square wave–sync errors here trigger P0340/P0344 codes.
• Crankshaft position input: Terminal C2-44 (tan/light blue tracer). Low-voltage AC signal–verify distinct 58-tooth pattern with scope during cranking.
• CAN bus high/low: Terminals C2-71 (tan/yellow tracer) and C2-72 (tan/orange tracer). Measure 2.5V differential–replace if shorted or open.

For wire color accuracy, refer to the following factory-standard tracers:

1. Solid colors indicate primary function: red (power), black (ground), gray (sensor signals).
2. Black tracer (e.g., dark green/black) denotes a secondary ground or return path.
3. Red tracer (e.g., purple/red) signals a fused circuit–trace back to fuse #27 (20A) in the integrated power module.
4. White tracer (e.g., light blue/white) represents communication lines–avoid splicing into these.

When probing terminals, use back-probing techniques–insert pins between the terminal and housing, not into the wire itself. Apply dielectric grease to connectors during reassembly to prevent corrosion. If wiring appears damaged, strip only the affected section, splice with heat-shrink crimp connectors, and solder for durability. Avoid tape-only repairs.

For EGR valve diagnostics, focus on terminal C2-14 (light green/dark blue tracer)–this line carries a 0-5V signal proportional to valve position. Misfires (P0300 series) often stem from compromised ground returns; prioritize inspecting terminal C1-65’s continuity to the engine block ground strap near the transmission bellhousing.

Always cross-reference findings with a live scan tool–compare wire colors to PID values to isolate mismatches. Replace the entire harness if more than three wires show resistance exceeding 2 ohms per foot or if insulation is brittle/cracked.

Step-by-Step Guide to Testing Control Module Voltage Inputs and Ground Connections

Locate the powertrain control connector under the vehicle’s dashboard or near the firewall. Use a multimeter set to DC voltage (20V range) to probe pin A12 (battery voltage supply) against a known good chassis ground. A reading between 11.5V and 14.5V confirms proper power delivery. If voltage is absent or fluctuates, inspect the fuse linked to this circuit–typically a 20A fuse in the under-hood distribution box–or trace the wiring for corrosion, chafing, or loose terminals.

Verify the ignition-switched voltage input at pin K20. With the key in the ON position, the multimeter should register 10.5V–14V. If the reading is zero, examine the ignition relay and associated wiring. Remove the relay and test for continuity between the 85/86 coil terminals–any resistance above 100 ohms indicates a faulty relay. Check the 30/87 contacts for battery voltage when the relay is energized.

Test ground circuits by setting the multimeter to ohms (200Ω range). Probe between the module’s ground pins (Z1, Z2) and the negative battery terminal. A reading below 0.5 ohms confirms a solid ground path. Higher resistance suggests corrosion at the ground eyelet or a poor chassis connection. Clean the ground point with a wire brush and re-secure with a star washer to ensure metal-to-metal contact.

Check sensor reference voltage outputs at pins C1/C2. With the key ON, the multimeter should read 4.8V–5.2V. If voltage is missing, back-probe the circuit upstream to isolate whether the issue lies within the module or downstream wiring. Inspect the wiring harness for shorts to ground–use a continuity tester to confirm no accidental connections to chassis ground exist along the signal path.

Examine signal return paths by probing pins D4/D5 while cranking the engine. Voltage should stabilize around 0.5V–2.5V depending on load. Erratic readings indicate an intermittent ground or a failing sensor. Use a breakout box to isolate individual circuits, ensuring no cross-talk between signal and power lines.

For low-reference circuits, set the multimeter to millivolt mode. Probe between pin E1 and a clean chassis ground–readings above 50mV suggest excessive resistance. Trace the ground wire to its termination point, often a chassis stud or engine block. Remove paint or coatings at the connection site to restore conductivity.

If all voltage inputs and grounds check out but issues persist, swap the module with a known-good unit to rule out internal failure. Relearn throttle position and idle parameters if required–consult the service manual for drive cycle procedures specific to the vehicle’s make. Clear diagnostic trouble codes before retesting.

Document each test result, noting voltage at every pin under various conditions (key OFF, key ON, engine running). Compare findings against factory wiring schematics–discrepancies often point to overlooked faults in splices, connectors, or aftermarket modifications interfering with signal integrity.