POWERTRAIN CONTROL MODULE (PCM)
Note. If replacing Powertrain Control Module (PCM), the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into the PCM to prevent Diagnostic Trouble Codes (DTCs) from being set in the Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, see PCM PROGRAMMING . If replacing Powertrain Control Module (PCM) on models equipped with a Smart Key Immobilizer Module (SKIM), the secret key data must also be updated to enable engine starting. To update secret key data, see PCM PROGRAMMING .
Procedure For Programming PCM & Clearing DTCs From ABS & SRS Modules
Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. Using scan tool, enter correct VIN and mileage into PCM. Using scan tool manufacturer's instructions, clear DTCs from ABS and SRS modules.
Procedure For Updating Secret Key Data
- Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel.
- Go to ENGINE and then MISC menus on scan tool. Place the SKIM in SECURED ACCESS MODE by using the appropriate Personal Identification Number (PIN) for this vehicle. PIN may be obtained from the owner, vehicle's invoice, or from the manufacturer. Select UPDATE THE SECRET KEY DATA. The data will be transferred from Smart Key Immobilizer Module (SKIM) to the PCM, allowing the vehicle to start. NOTE: On Ram Van and Ram Wagon, if 3 attempts are made to enter the SECURED ACCESS MODE using the incorrect Personal Identification Number (PIN), the SECURED ACCESS MODE will be locked out for one hour. To exit this locked out mode, leave ignition switch in the ON position for one hour with all accessories turned off. It may be necessary to monitor battery state and connect a battery charger if necessary.
BRAKE SWITCH
Note. Brake switch may also be referred to as brakelight switch or stoplight switch.
DOWNSTREAM OXYGEN SENSOR
Note. Downstream oxygen sensor may also be referred to as post-catalyst oxygen sensor.
INTAKE AIR TEMPERATURE (IAT) SENSOR
Note. Intake air temperature sensor may also be referred to as intake manifold air temperature sensor.
OIL PRESSURE SENSOR
Note. Oil pressure sensor may also be referred to as engine oil pressure sensor.
OUTPUT SHAFT SPEED SENSOR
Note. Output shaft speed sensor may also be referred to as transmission speed sensor.
PARK/NEUTRAL SWITCH
Note. Park/neutral switch may also be referred to as park/neutral position switch.
TRANSMISSION OVERDRIVE SWITCH
Note. Transmission overdrive switch may also be referred to as overdrive/override switch, OD switch or overdrive off switch.
UPSTREAM OXYGEN SENSOR
Note. Upstream oxygen sensor may also be referred to as pre-catalyst oxygen sensor.
A/C RELAY, AUTO SHUTDOWN (ASD) RELAY & FUEL PUMP RELAY
Note. A/C relay may also be referred to as A/C clutch relay or A/C compressor clutch relay.
STARTER RELAY & TRANSMISSION RELAY
Note. Transmission relay may also be referred to as transmission control relay.
EVAP PURGE SOLENOID
Note. EVAP purge solenoid may also be referred to as EVAP canister purge solenoid, duty cycle solenoid or proportional purge solenoid.
TRANSMISSION GOVERNOR PRESSURE SOLENOID
Note. Transmission governor pressure solenoid may also be referred to as governor pressure solenoid.
FUEL SYSTEM PRESSURE RELEASE
| WARNING | Always release fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components. |
- Remove fuel cap from fuel tank. Note location of spring loaded flapper valve inside fuel tank filler tube assembly. Flapper valve is located just below the fuel cap area on fuel tank filler tube assembly. Flapper valve is used as a secondary way of sealing the fuel tank if fuel cap was not properly tightened. WARNING: When opening flapper valve inside fuel tank filler tube assembly, ensure a non-metallic object is used to prevent any sparks.
- Using a non-metallic object, push flapper valve inside filler tube assembly downward to release any pressure from the fuel tank. Ensure all pressure is released from fuel tank.
- Remove fuel pump relay from Power Distribution Center (PDC). Fuel pump relay may be identified by label on inside of PDC cover. See «POWER DISTRIBUTION CENTER (PDC) LOCATION»(ref-574-S08244975852000030800000) table.
- On all models, start engine and allow engine to idle until engine stalls. Attempt to restart engine until engine will no longer run. Turn ignition off. CAUTION: Ensure steps 1) through 4) are performed before proceeding. Steps 3) and 4) must be performed to ensure most of the fuel pressure is released from fuel rails to prevent an excessive amount of fuel being delivered into the cylinders.
- Remaining fuel pressure is released by energizing a fuel injector. Disconnect electrical connector at any fuel injector.
- Connect jumper wire between one electrical terminal on fuel injector and positive battery terminal. Connect another jumper wire on remaining electrical terminal on fuel injector. CAUTION: DO NOT apply battery voltage to fuel injector for extended periods, or fuel injector may be damaged.
- Momentarily touch remaining end of jumper wire to negative battery terminal in short intervals to energize fuel injector and release remaining fuel pressure.
- Remove jumper wires. Reinstall electrical connector and fuel pump relay. Fuel system components may now be serviced. Cover fuel lines with shop towel before disconnecting, as some residual fuel pressure may exist.
- Diagnostic Trouble Code (DTCs) may have been stored in Powertrain Control Module (PCM) due to the removal of fuel pump relay. Using scan tool, clear DTCs from PCM. See appropriate SELF-DIAGNOSTICS article for clearing of DTCs.
FUEL LINE DISCONNECT FITTINGS
Note. Fuel lines may contain single tab, dual tab or plastic retainer ring disconnect fitting. (Scheme 44) Determine type of disconnect fitting used and use proper procedure for proper disconnect fitting.
Scheme 44
FUEL LEVEL SENSOR
Note. Fuel level sensor may also be referred to as fuel gauge sending unit.
EVAP LEAK DETECTION PUMP
Note. EVAP leak detection pump may also be referred to as Leak Detection Pump (LDP).
Note. EVAP purge solenoid may also be referred to as EVAP canister purge solenoid, duty cycle solenoid or proportional purge solenoid.