Chrysler Voyager 2000 GS Instruction
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Chrysler Voyager 2000 GS Instruction

Emission control systems
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ON-BOARD DIAGNOSTICS . . . . . . . . . . . . . . . . . . . 1
EVAPORATIVE EMISSION CONTROLS . . . . . . . . . 22
DESCRIPTION AND OPERATION
SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . 1
MALFUNCTION INDICATOR LAMP (MIL) . . . . . . . . 2
DRB III STATE DISPLAY TEST MODE . . . . . . . . . . 2
DRB III CIRCUIT ACTUATION TEST MODE . . . . . . 2
DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . 2
DIAGNOSTIC TROUBLE CODE
DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3
DESCRIPTION AND OPERATION
SYSTEM DESCRIPTION
DESCRIPTION
OBD II requires that vehicles falling under OBD II
guidelines utilize the following system monitors:
• Comprehensive Component Monitor (inputs/out-
puts for powertrain management that affect emis-
sions, but do not have a specific major monitor)
• Fuel
Control
Monitor
required to maintain stoichiometric ratio rich/lean)
• Misfire Monitor (change in crankshaft speed)
• Oxygen Sensor Heater Monitor (response and
performance of oxygen sensors)
• Catalyst Monitor (Performance and efficiency of
catalyst)
• Evaporative Emissions Monitor (performance of
and leaks from EVAP system)
• Exhaust Gas Recirculation Monitor (flow perfor-
mance of EGR system)
The software was rewritten to enable the PCM to
carry out the responsibilities to meet these required
guidelines. The PCM now contains a Task Manager.
EMISSION CONTROL SYSTEMS
TABLE OF CONTENTS
page
ON-BOARD DIAGNOSTICS
TABLE OF CONTENTS
page
(fuel
compensation
EMISSION CONTROL SYSTEMS
EXHAUST GAS RECIRCULATION (EGR)
SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
MONITORED SYSTEMS. . . . . . . . . . . . . . . . . . . . 12
TRIP DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . 16
MONITORED COMPONENT . . . . . . . . . . . . . . . . . 16
NON-MONITORED CIRCUITS . . . . . . . . . . . . . . . 20
HIGH AND LOW LIMITS . . . . . . . . . . . . . . . . . . . . 21
SPECIFICATIONS
LOAD VALUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
OPERATION
The Powertrain Control Module (PCM) monitors
many different circuits in the fuel injection, ignition,
emission and engine systems. If the PCM senses a
problem with a monitored circuit often enough to
indicate an actual problem, it stores a Diagnostic
Trouble Code (DTC) in the PCM's memory. If the
code applies to a non-emissions related component or
system, and the problem is repaired or ceases to
exist, the PCM cancels the code after 40 warmup
cycles. Diagnostic trouble codes that affect vehicle
emissions illuminate the Malfunction Indicator Lamp
(MIL). Refer to Malfunction Indicator Lamp in this
section.
Certain criteria must be met before the PCM
stores a DTC in memory. The criteria may be a spe-
cific range of engine RPM, engine temperature,
and/or input voltage to the PCM.
The PCM might not store a DTC for a monitored
circuit even though a malfunction has occurred. This
may happen because one of the DTC criteria for the
circuit has not been met. For example, assume the
diagnostic trouble code criteria requires the PCM to
monitor the circuit only when the engine operates
between 750 and 2000 RPM. Suppose the sensor's
output circuit shorts to ground when engine operates
above 2400 RPM (resulting in 0 volt input to the
25 - 1
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  • Page 1 EMISSION CONTROL SYSTEMS 25 - 1 EMISSION CONTROL SYSTEMS TABLE OF CONTENTS page page ON-BOARD DIAGNOSTICS ....1 EXHAUST GAS RECIRCULATION (EGR) EVAPORATIVE EMISSION CONTROLS .

  • Page 2: Malfunction Indicator Lamp (Mil)

    25 - 2 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) PCM). Because the condition happens at an engine Limp-In mode or identified a failed emission compo- speed above the maximum threshold (2000 rpm), the nent or system. The MIL remains on until the DTC PCM will not store a DTC.

  • Page 3: Descriptions

    EMISSION CONTROL SYSTEMS 25 - 3 DESCRIPTION AND OPERATION (Continued) Remember that DTC’s are the results of a sys- OBTAINING DTC’S USING DRB SCAN TOOL tem or circuit failure, but do not directly iden- (1) Connect the DRB scan tool to the data link tify the failed component or components.

  • Page 4: Description And Operation

    25 - 4 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P0132 (M) 1/1 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.

  • Page 5: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 5 DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P0165 Starter Relay Control Circuit An open or shorted condition detected in the starter relay control circuit.

  • Page 6: Description And Operation

    25 - 6 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P0307 (M) CYLINDER #7 MISFIRE Misfire detected in cylinder #7 P0308 (M) CYLINDER #8 MISFIRE Misfire detected in cylinder #8.

  • Page 7: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 7 DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P0442 (M) Evap Leak Monitor Medium Leak A small leak has been detected in the evaporative Detected system.

  • Page 8: Description And Operation

    25 - 8 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P0712 Trans Temp Sensor Voltage Too Low Transmission fluid temperature sensor input below acceptable voltage.

  • Page 9: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 9 DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P1290 CNG Fuel System Pressure Too Compressed natural gas system pressure above normal High operating range.

  • Page 10: Description And Operation

    25 - 10 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P1483 Catalyst Temperature Sensor Circuit Catalyst temperature sensor circuit shorted high. Shorted High.

  • Page 11: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 11 DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P1682 (G) Charging System Voltage Too Low Battery voltage sense input below target charging voltage during engine operation and no significant change in voltage detected during active test of generator output circuit.

  • Page 12: Monitored Systems

    25 - 12 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) (M) Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was recorded. (G) Generator Lamp Illuminated P1765 Trans 12 Volt Supply Relay CTRL An open or shorted condition is detected in the Circuit Transmission Relay control circuit.

  • Page 13: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 13 DESCRIPTION AND OPERATION (Continued) MISFIRE MONITOR The 1000 revolution counters are two trip moni- tors. As with the fuel system monitor, Freeze Frame Excessive engine misfire results in increased cata- data is from the original fault, and MIL extinguish- lyst temperature and causes an increase in HC emis- ing requires the monitor to pass under similar condi- sions.

  • Page 14: Description And Operation

    25 - 14 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) • MAP voltage rapidly changing Rich fault for that trip and a Freeze Frame is • Severe engine decel entered. • TPS toggling OPEN/CLOSED The Fuel Monitor is a two trip monitor. The PCM •...

  • Page 15: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 15 DESCRIPTION AND OPERATION (Continued) EVAPORATIVE EMISSIONS MONITOR rate is again interrogated and when it increases due to the flow through the purge system, the leak check LEAK DETECTION PUMP MONITOR— The portion of the diagnostic is complete. leak detection assembly incorporates two primary The canister vent valve will unseal the system functions: it must detect a leak in the evaporative...

  • Page 16: Trip Definition

    25 - 16 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) • The engine must be running Enabling Conditions (Stage Two)— The follow- • A rise of 40°F in engine temperature must occur ing conditions must be met to enable the EVAP Mon- itor (without LDP) from the time when the engine was started •...

  • Page 17: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 17 DESCRIPTION AND OPERATION (Continued) • Torque Converter Clutch Solenoid emissions-related components for electrical opens and • Idle Air Control shorts. • Purge Solenoid However, OBD II also requires that inputs from • EGR Solenoid powertrain components to the PCM be tested for •...

  • Page 18: Description And Operation

    25 - 18 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) Heater Performance— The heater is tested by a Conflict— The Task Manager does not run the separate monitor. Refer to the Oxygen Sensor Heater Oxygen Sensor Monitor if any of the following condi- Monitor.

  • Page 19: Description And Operation

    EMISSION CONTROL SYSTEMS 25 - 19 DESCRIPTION AND OPERATION (Continued) detects a voltage decrease of a predetermined value As the converter loses the ability to store oxygen, for several biased pulses, the test passes. the condition can be detected from the behavior of The heater elements are tested each time the the downstream O2S.

  • Page 20: Non-Monitored Circuits

    25 - 20 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) Enabling Conditions— The following conditions NON-MONITORED CIRCUITS must typically be met before the PCM runs the cat- alyst monitor. Specific times for each parameter may OPERATION be different from engine to engine. The PCM does not monitor all circuits, systems •...

  • Page 21: High And Low Limits

    EMISSION CONTROL SYSTEMS 25 - 21 DESCRIPTION AND OPERATION (Continued) VACUUM ASSIST HIGH AND LOW LIMITS The PCM cannot detect leaks or restrictions in the OPERATION vacuum circuits of vacuum assisted engine control system devices. However, these could cause the PCM The PCM compares input signal voltages from each to store a MAP sensor diagnostic trouble code and input device with established high and low limits for...

  • Page 22: Table Of Contents

    25 - 22 EMISSION CONTROL SYSTEMS EVAPORATIVE EMISSION CONTROLS TABLE OF CONTENTS page page DESCRIPTION AND OPERATION POSITIVE CRANKCASE VENTILATION VALVE. . . 25 EVAPORATION CONTROL SYSTEM ..22 CRANKCASE VENT FILTER ....26 EVAPORATIVE (EVAP) CANISTER .

  • Page 23: Proportional Purge Solenoid

    EMISSION CONTROL SYSTEMS 25 - 23 DESCRIPTION AND OPERATION (Continued) PROPORTIONAL PURGE SOLENOID pump by drawing air into the pump cavity and also closes the vent seal. During non-test test conditions, the vent seal is held open by the pump diaphragm DESCRIPTION assembly which pushes it open at the full travel posi- tion.

  • Page 24: Positive Crankcase Ventilation (Pcv) Systems

    25 - 24 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) The three-port LDP solenoid valve is used to previous cycling (pumping) of the LDP by the techni- expose either engine vacuum or atmospheric pressure cian (dealer test). Another way that this condition is to the top side of the leak detection pump diaphragm.

  • Page 25: Positive Crankcase Ventilation Valve

    EMISSION CONTROL SYSTEMS 25 - 25 DESCRIPTION AND OPERATION (Continued) Fig. 3 PCV Valve—2.4L Engine 1 – PCV VALVE 2 – INTAKE MANIFOLD Fig. 5 PCV Valve and Fresh Air Hose— 3.3/3.8L Engines 1 – THROTTLE BODY 2 – RESONATOR 3 –...

  • Page 26: Crankcase Vent Filter

    LABEL DESCRIPTION Fig. 9 Leak Detection Pump All models have a Vehicle Emission Control Infor- mation (VECI) Label. Chrysler permanently attaches the label in the engine compartment. It cannot be removed without defacing information and destroying the label. The label contains the vehicle’s emission specifica- tions and vacuum hose routings.

  • Page 27: System

    EMISSION CONTROL SYSTEMS 25 - 27 EXHAUST GAS RECIRCULATION (EGR) SYSTEM TABLE OF CONTENTS page page DESCRIPTION AND OPERATION EGR TUBE SERVICE—3.0L ENGINES ..29 EXHAUST GAS RECIRCULATION ... . 27 EGR TUBE SERVICE—3.3/3.8L ENGINES .
  • Page 28 25 - 28 EMISSION CONTROL SYSTEMS DESCRIPTION AND OPERATION (Continued) Fig. 3 EGR Mounting—3.3/3.8L Engines 1 – BACKPRESSURE TRANSDUCER 2 – EGR SOLENOID 3 – EGR VALVE Fig. 4 Electric EGR Transducer uum flows through the transducer to operate the 1 –...
  • Page 29 EMISSION CONTROL SYSTEMS 25 - 29 REMOVAL AND INSTALLATION (Continued) Fig. 5 EGR System Service—3.0L Engines Fig. 6 EGR System—3.3/3.8L Engines 1 – ELECTRICAL EGR TRANSDUCER 2 – EGR VALVE 1 – BACKPRESSURE TRANSDUCER 3 – EGR TUBE 2 – EGR SOLENOID 4 –...

  • Page 30: Special Tools

    25 - 30 EMISSION CONTROL SYSTEMS REMOVAL AND INSTALLATION (Continued) INSTALLATION (1) Loosely assemble EGR tube and new gaskets into place on intake and exhaust manifolds. (2) Tighten mounting bolts to 22 N·m (200 in. lbs.) torque. SPECIAL TOOLS EMISSION CONTROL SYSTEM Hose Clamp Pliers 6094 Fig.

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