catalytic converter DODGE RAM 1999 Service Repair Manual
[x] Cancel search | Manufacturer: DODGE, Model Year: 1999, Model line: RAM, Model: DODGE RAM 1999Pages: 1691, PDF Size: 40.34 MB
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"B" ABBREVIATION TABLE
"B" ABBREVIATION TABLE
ABBREVIATION DEFINITION B/P Backpressure BAC By-Pass Air Control BAP Barometric Absolute Pressure Sensor BARO Barometric BBDC Before Bottom Dead Center BCM Body Control Module BDC Bottom Dead Center BHP Brake Horsepower BLK Black BLU Blue BMAP Barometric & Manifold Absolute Pressure
Sensor BOO Brake On-Off Switch BP Barometric Pressure sensor BPS Barometric Pressure sensor BPT Backpressure Transducer BRN Brown BTDC Before Top Dead Center BTU British Thermal Unit BVSV Bimetallic Switching Valve Baro. Barometric Batt. Battery Bbl. Barrel (Example:4-Bbl.) Blst. Ballast Blwr. Blower Brkr. Breaker
"C" ABBREVIATION TABLE
"C" ABBREVIATION TABLE
ABBREVIATION DEFINITION C Celsius (Degrees) C(3) Computer Controlled Coil Ignition C(4) Computer Controlled Catalytic Converter CANP Canister Purge solenoid CARB California Air Resources Board CAT Catalytic Converter CB Circuit Breaker CBD Closed Bowl Distributor CBVV Carburetor Bowl Vent valve cc Cubic Centimeter CCC Computer Command Control CCD Computer Controlled Dwell CCM Central Control Module CCO Converter Clutch Override CCOT Cycling Clutch Orifice Tube CCW Counterclockwise CDI Capacitor Discharge Ignition CEC Computerized Engine Control CFI Central Fuel Injection CID Cubic Inch Displacement CID Cylinder Identification sensor CIS Continuous Injection System CIS-E Continuous Injection System-Electronic
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Engine Oil Pressure Sensor
(8.0L) Near oil filter.
Front Wheel Speed Sensors On left and right steering
knuckles.
Heated Oxygen Sensor (HO2S)
(Downstream) (3.9L) Near outlet end of catalytic\
converter.
Heated Oxygen Sensor (HO2S)
(Downstream) (5.2L) Near outlet end of catalytic\
converter.
Heated Oxygen Sensor (HO2S)
(Left Upstream) (5.9L Heavy Duty) In left exhaust manifold
downpipe.
Heated Oxygen Sensor (HO2S)
(Left Upstream) (8.0L) In left exhaust manifold
downpipe.
Heated Oxygen Sensor (HO2S)
(Post-Catalyst) (5.9L Medium Duty) Near outlet end of catalytic\
converter.
Heated Oxygen Sensor (HO2S)
(Post-Catalyst) (8.0L California) In exhaust pipe, rear of
catalytic converter.
Heated Oxygen Sensor (HO2S)
(Pre-Catalyst) (5.9L Medium Duty) At inlet of catalytic
converter.
Heated Oxygen Sensor (HO2S)
(Pre-Catalyst) (8.0L California) At inlet of catalytic
converter.
Heated Oxygen Sensor (HO2S)
(Right Upstream) (5.9L Heavy Duty) In right exhaust manifold
downpipe.
Heated Oxygen Sensor (HO2S)
(Right Upstream) (8.0L) In right exhaust manifold
downpipe.
Heated Oxygen Sensor (HO2S)
(Upstream) (3.9L) At inlet of catalytic
converter.
Heated Oxygen Sensor (HO2S)
(Upstream) (5.2L) At inlet of catalytic
converter.
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![DODGE RAM 1999 Service Repair Manual \
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5.2L V8 SFI PCV, EVAP, TWC, FR, (](/img/12/56915/w960_56915-596.png "DODGE RAM 1999 Service Repair Manual \
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5.2L V8 SFI PCV, EVAP, TWC, FR, (")
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5.2L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Ram Pickup SPK, (
1) HO2S, CEC, ( 2)( 6) EVAP-LDP,
MIL (
6) EVAP-LDPF,
(
6) EVAP-VV, EVAP-VC,
SPK-CC
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5.2L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Ram Van & SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
Ram Wagon MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
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5.2L V8 CNG PCV, TWC, SPK, SPK-CC
Ram Van & (
1) HO2S, CEC, MIL
Ram Wagon
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5.9L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Dakota SPK, (
7) HO2S, CEC, ( 2)( 3) EVAP-LDP,
MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
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5.9L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Durango SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
MIL (
3) EVAP-LDPF, ( 5) EVAP-VV,
EVAP-VC, SPK-CC
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5.9L V8 SFI PCV, EVAP, (
8) TWC, ( 2) EVAP-PSOL, EVAP-PRRV,
Ram Pickup FR, SPK, (
9) AP, ( 2)( 6) EVAP-LDP,
(
1) HO2S, CEC, ( 6) EVAP-LDPF,
(
9) SRI, MIL ( 6) EVAP-VV, EVAP-VC,
SPK-CC, (
9) AP-RV,
(
1)( 9) AP-CKV
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5.9L V8 SFI PCV, EVAP, TWC, FR, (
2) EVAP-PSOL, EVAP-PRRV,
Ram Van & SPK, (
1) HO2S, CEC, ( 2)( 3) EVAP-LDP,
Ram Wagon MIL (
3) EVAP-LDPF,
(
5) EVAP-VV, EVAP-VC,
SPK-CC
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5.9L 6-Cyl. AIH, MIL AIH-TS
Turbo Diesel
24-Valve EFI
Ram Pickup
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8.0L V10 SFI (
4) CCV, EVAP, ( 2) EVAP-PSOL, EVAP-PRRV,
Ram Pickup (
10) TWC, FR, SPK, ( 2)( 6) EVAP-LDP,
(
9) AP, ( 11) HO2S, ( 6) EVAP-LDPF,
CEC, MIL (
6) EVAP-VV, EVAP-VC,
SPK-CC, (
9) AP-RV,
(
1)( 9) AP-CKV
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(
1) - Two are required.
(
2) - Electronically controlled.
(
3) - Calif. emission vehicles only.
(
4) - Fixed orifice system without a PCV valve.
(
5) - Except Calif. emission vehicles only.
(
6) - Applies to some models. Refer to underhood vehicle emission
control label for application.
(
7) - On 2WD models, four sensors are used. One on each bank, and
one before and after catalytic converter. On 4WD models, two
sensors are used. One before and after catalytic converter.
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(8) - One used on vehicles with light-duty emissions. Two used on
vehicles with heavy-duty emissions.
(
9) - Used on vehicles with heavy-duty emissions.
(
10 ) - Two catalytic converters are required.
(
11 ) - Four sensors used on vehicles with medium-duty emissions.
Two sensors used on vehicles with heavy-duty emissions.
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ABBREVIATIONS
ABBREVIATION DEFINITIONS\
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Abbreviation Definition
AIH ................................... Air Intake Heaters
AIH-TS ............................ AIH Temperature Sensor
AP ............................. Air Pump Injection System
AP-CKV .................................... AP Check Valve
AP-RV .................................... AP Relief Valve
BP/EGR ........................... Backpressure EGR System
BP/EGR-BPT ................ BP/EGR Backpressure Transducer
CCV ................................ Crankcase Ventilation
CEC ......................... Computerized Engine Controls
CNG ............................... Compressed Natural Gas
EFI ............................ Electronic Fuel Injection
EGR-CKV .................................. EGR Check Valve
EVAP ............................. Fuel Evaporative System
EVAP-CVV ........................ EVAP Canister Vent Valve
EVAP-LDP ........................ EVAP Leak Detection Pump
EVAP-LDPF ................ EVAP Leak Detection Pump Filter
EVAP-PRRV ............ EVAP Pressure Relief Rollover Valve
EVAP-PSOL ............................ EVAP Purge Solenoid
EVAP-VC .............................. EVAP Vapor Canister
EVAP-VV ........................... EVAP Ventilation Valve
FR ................................... Fillpipe Restrictor
HO2S ................................ Heated Oxygen Sensor
MIL .......................... Malfunction Indicator Light
PCV ....................... Positive Crankcase Ventilation
SFI .................. Sequential Multiport Fuel Injection
SPK ....................................... Spark Controls
SPK-CC ........................... SPK Computer Controlled
TWC ........................ Three-Way Catalytic Converter
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Fig. 4: Typical Fuel Evaporative System
CATALYTIC CONVERTERS
Oxidation Catalyst (OC)
This type of converter is the most common. It may use pellets
or monolith medium, depending upon application. See Fig. 5. Platinum
and palladium (or platinum alone) are used as catalyst in this type of\
converter.
Visually check for presence of catalytic converter(s). Check
for external damage such as severe dents, removed or damaged heat
shields, etc. Also check for pellets or pieces of converter in the
tailpipe.
Fig. 5: Typical Oxidation Catalytic Converter (Pellet Type) Shown;
Typical Three-Way Catalytic Converter Is Similar
Courtesy of General Motors Corp.
Three-Way Catalyst (TWC)
This type of converter is nearly identical to a conventional
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converter with the exception of the catalyst. See Fig. 5. The TWC
converter uses rhodium, with or without platinum, as its catalyst.
Rhodium helps reduce NOx emissions, as well as HC and CO.
Visually check for presence of catalytic converter(s). Also
check for presence of any required air supply system for the oxidizing
section of the converter. Check for external damage such as severe
dents, removed or damaged heat shields, etc. Check for pellets or
pieces of converter in the tailpipe.
Three-Way Catalyst + Oxidation Catalyst (TWC + OC)
This system contains a TWC converter and an OC converter in a
common housing, separated by a small air space. See Fig. 6. The 2
catalysts are referred to as catalyst beds. Exhaust gases pass through
the TWC first. The TWC bed performs the same function as it would as a
separate device, reducing all 3 emissions. As exhaust gases leave the
bed, they pass through the air space and into the second (OC)
converter catalyst bed.
Visually check for presence of catalytic converter(s). Check
for external damage such as severe dents, removed or damaged heat
shields, etc. Check for pellets or pieces of converter in the
tailpipe.
Fig. 6: Typical Three-Way + Oxidation Catalytic Converter
Courtesy of General Motors Corp.
FILL PIPE RESTRICTOR (FR)
A fuel tank fill pipe restrictor is used to prohibit the
introduction of leaded fuel into the fuel tank. Unleaded gasoline pump
dispensers have a smaller diameter nozzle to fit fuel tank of vehicle
requiring the use of unleaded fuel (vehicles equipped with catalytic
converter).
Visually inspect fill pipe restrictor(s) for tampering, i.e.,\
restrictor is oversize or the flapper is non-functional. If vehicle is
equipped with an auxiliary fuel tank, ensure auxiliary fuel tank is
also equipped with a fill pipe restrictor.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM
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Fig. 14: Typical Pulsed Secondary Air Injection System
Courtesy of General Motors Corp.
OXYGEN SENSOR (O2)
The O2 sensor is mounted in the exhaust system where it
monitors oxygen content of exhaust gases. Some vehicles may use 2 O2
sensors. The O2 sensor produces a voltage signal which is proportional
to exhaust gas oxygen concentration (0-3%) compared to outside oxygen
(20-21%). This voltage signal is low (about .1 volt) when a lean
mixture is present and high (1.0 volt) when a rich mixture is present.\
As ECM compensates for a lean or rich condition, this voltage
signal constantly fluctuates between high and low, crossing a
reference voltage supplied by the ECM on the O2 signal line. This is
referred to as cross counts. A problem in the O2 sensor circuit should
set a related trouble code.
COMPUTERIZED ENGINE CONTROLS (CEC)
The CEC system monitors and controls a variety of
engine/vehicle functions. The CEC system is primarily an emission
control system designed to maintain a 14.7:1 air/fuel ratio under most
operating conditions. When the ideal air/fuel ratio is maintained, the
catalytic converter can control oxides of nitrogen (NOx), hydrocarbon
(HC) and carbon monoxide (CO) emissions.
The CEC system consists of the following sub-systems:
Electronic Control Module (ECM), input devices (sensors and switches)\
and output signals.
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* E XH AU ST S YSTE M U NIF O RM IN SPEC TIO N G UID ELIN ES *
1 999 D odge P ic ku p R 1500
GENERAL INFORMATION
Exhaust Systems Motorist Assurance Program
Standards For Automotive Repair
All Makes and Models
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
CONTENTS
Motorist Assurance Program (MAP)
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
OVERVIEW OF SERVICE REQUIREMENTS AND SUGGESTIONS
Exhaust
CATALYTIC CONVERTERS
EXHAUST AND TAIL PIPES
EXHAUST CONNECTIONS
HANGERS
HEAT RISERS (MECHANICAL EFE DEVICES)
HEAT SHIELDS
MANIFOLDS (CAST AND TUBE TYPE)
MECHANICAL EFE DEVICES
MUFFLERS AND RESONATORS
INTRODUCTION TO MOTORIST ASSURANCE PROGRAM (MAP)
OVERVIEW OF MOTORIST ASSURANCE PROGRAM
The Motorist Assurance Program is the consumer outreach
effort of the Automotive Maintenance and Repair Association, Inc.
(AMRA). Participation in the Motorist Assurance Program is drawn from
retailers, suppliers, independent repair facilities, vehicle
manufacturers and industry associations.
Our organization's mission is to strengthen the relationship
between the consumer and the auto repair industry. We produce
materials that give motorists the information and encouragement to
take greater responsibility for their vehicles-through proper,
manufacturer-recommended, maintenance. We encourage participating
service and repair shops (including franchisees and dealers) to adopt
(1) a Pledge of Assurance to their Customers and (2) the Motorist
Assurance Program Standards of Service. All participating service
providers have agreed to subscribe to this Pledge and to adhere to the
promulgated Standards of Service demonstrating to their customers that
they are serious about customer satisfaction.
These Standards of Service require that an inspection of the
vehicle's (problem) system be made and the results communicated to the\
customer according to industry standards. Given that the industry did
not have such standards, the Motorist Assurance Program successfully
promulgated industry inspection communication standards in 1994-95 for
the following systems: Exhaust, Brakes, ABS, Steering and Suspension,
Engine Maintenance and Performance, HVAC, and Electrical Systems.
Further, revisions to all of these inspection communication standards
are continually re-published. In addition to these, standards for
Drive Train and Transmissions have recently been promulgated.
Participating shops utilize these Uniform Inspection & Communication
Page 812 of 1691
1 - Part is close to the end of its useful life (just above
discard specifications, or weak; failure likely to occur
soon, etc.)
2 - To address a customer need, convenience, or request (to
stiffen ride, enhance performance, eliminate noise,
etc.)
3 - To comply with maintenance recommended by the vehicle's
Original Equipment Manufacturer (OEM)
4 - Technician's recommendation based on substantial and
informed experience
NOTE: Suggested services are always optional. When presenting
suggested repairs to the customer, you must present
the facts, allowing the customer to draw their own
conclusions and make an informed decision about how to
proceed.
EXHAUST
SERVICE PROCEDURES REQUIRED AND SUGGESTED FOR PROPER
VEHICLE OPERATION
WARNING: Federal EPA rules prohibit altering an exhaust system in
any way that defeats the emission reduction components of a
vehicle. Be sure to review and adhere to EPA policy on
removing and replacing catalytic converters. Where state or
local laws are stricter, they take precedence over these
guidelines.
NOTE: Some exhaust systems are of a welded design. It is not
required that the entire system be replaced. Determine the
need to replace individual components based on conditions of
component.
CATALYTIC CONVERTERS
CAUTION: Before working on an exhaust system, review EPA
regulations on removing and replacing catalytic converters.
NOTE: Any time a converter has failed, further diagnosis is
required to determine the reason(s) for converter failure.
CATALYTIC CONVERTER INSPECTION
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Condition Code Procedure
Air injection tube
broken ................. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
burnt .................. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
leaking ................ A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
Page 813 of 1691
loose .................. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
restricted ............. A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
threads damaged ........ A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Air injection tube
threads stripped
(threads missing) ...... A ... Require repair or replacement
of injection tube or
replacement of catalytic
converter.
Body cracked ............ B .. Require repair or replacement.
Converter empty ......... A .. Require repair or replacement.
Converter fill plug
missing ................ C .. Require repair or replacement.
Converter missing ....... C ............ Require replacement.
Exhaust gases leaking ... A .. Require repair or replacement.
Flanges leaking ......... A ... Require repair or replacement
of flanges.
Inlet pipes cracked ..... B .. Require repair or replacement.
Internal rattle (except
pellet-type) ........... 2 .......... (1) Further inspection
required.
Mounting brackets that
are part of converter
broken ................. A .. Require repair or replacement.
Obvious overheating ..... .. ......... ( 2) Require testing of
converter.
Outlet pipes cracked .... B .. Require repair or replacement.
Pieces of catalyst
material found
downstream ............. 1 ............ Suggest replacement.
Plugged ................. A ........ ( 3) Require replacement.
Testing has determined
that existing converter
has been lead-poisoned,
contaminated, or failed
testing ................ A .. Require repair or replacement.
( 1) - If the converter is breaking up, suggest converter
replacement. If an object has fallen into the converter,
remove the object.
( 2) - Overheating is caused by something other than the
converter. Further diagnosis is required to determine
the cause of the overheating.
( 3) - Determine cause and correct to ensure that new converter
will not become plugged.
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EXHAUST AND TAIL PIPES
NOTE: For pipes with resonators, also see MUFFLERS AND RESONATORS.
EXHAUST AND TAIL PIPE INSPECTION