POWERTRAIN CONTROL MODULE (PCM)
Note. If replacing Powertrain Control Module (PCM), correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent Diagnostic Trouble Codes (DTCs) from being set in 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 .
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.
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 output 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. Transmission overdrive switch is part of shift lever and cannot be serviced separately.
UPSTREAM OXYGEN SENSOR
Note. Upstream oxygen sensor may also be referred to as pre-catalyst oxygen sensor.
Upstream oxygen sensor is mounted on exhaust pipe, in front of catalytic converter. Raise and support vehicle. Disconnect electrical connector for upstream oxygen sensor. Using Socket (YA8875), remove upstream oxygen sensor from exhaust pipe.
- If installing original or used upstream oxygen sensor, apply anti-seize compound on threads of upstream oxygen sensor. A NEW upstream oxygen sensor should already be coated with anti-seize compound.
- Install and tighten upstream oxygen sensor to specification. See «TORQUE SPECIFICATIONS»(ref-9080-S33253948852000100400000) . Install electrical connector.
A/C RELAY, AUTO SHUTDOWN (ASD) RELAY, FUEL PUMP RELAY,STARTER RELAY & TRANSMISSION RELAY
Note. A/C relay may also be referred to as A/C clutch relay or A/C compressor clutch relay. 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. Remove fuel pump relay from Power Distribution Center (PDC). Fuel pump relay can be identified by label on inside of PDC cover. See «POWER DISTRIBUTION CENTER (PDC) LOCATION»(ref-9080-S27741299402000100400000) table.
- Start engine and allow engine to idle until engine stalls. Attempt to restart engine until engine will no longer run. Turn ignition off. Service fuel system as necessary. After performing repairs, install fuel pump relay in PDC.
- Diagnostic Trouble Code (DTCs) may have been stored in Powertrain Control Module (PCM) due to 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 65) Determine type of disconnect fitting used and use proper procedure for proper disconnect fitting.
Scheme 65
FUEL LEVEL SENSOR
Note. Fuel level sensor may also be referred to as fuel gauge sending unit. For diesel models, see REMOVAL, OVERHAUL & INSTALLATION - TRUCKS (DIESEL) article.
ROLLOVER VALVE
Note. On Ram Pickup models equipped with diesel engines, rollover valve is serviceable and can be replaced. See REMOVAL, OVERHAUL & INSTALLATION - TRUCKS (DIESEL) article.
AIR INJECTION PUMP
Note. Only Ram Pickups equipped with Heavy Duty Cycle (HDC) 5.9L and 8.0L engines are equipped with air injection pumps.
AIR INJECTION PUMP AIR FILTER
Note. Only Ram Pickups equipped with Heavy Duty Cycle (HDC) 8.0L engines are equipped with air injection pumps and filters.
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.