The Automatic Shutdown (ASD) relay provides bat-
tery voltage to the ignition coil. The PCM provides a
ground contact (circuit) for energizing the coil. When
the PCM breaks the contact, the energy in the coil
primary transfers to the secondary causing the
spark. The PCM will de-energize the ASD relay if it
does not receive the crankshaft position sensor and
camshaft position sensor inputs. Refer to Automatic
Shutdown (ASD) Relay—PCM Output in this section
for relay operation.
MALFUNCTION INDICATOR (CHECK ENGINE)
LAMP—PCM OUTPUT
The PCM supplies the malfunction indicator (check
engine) lamp on/off signal to the instrument panel
through the CCD Bus. The CCD Bus is a communi-
cations port. Various modules use the CCD Bus to
exchange information.
The Check Engine lamp comes on each time the
ignition key is turned ON and stays on for 3 seconds
as a bulb test.
The Malfunction Indicator Lamp (MIL) stays on
continuously, when the PCM has entered a Limp-In
mode or identified a failed emission component. Dur-
ing Limp-in Mode, the PCM attempts to keep the
system operational. The MIL signals the need for
immediate service. In limp-in mode, the PCM com-
pensates for the failure of certain components that
send incorrect signals. The PCM substitutes for the
incorrect signals with inputs from other sensors.
If the PCM detects active engine misfire severe
enough to cause catalyst damage, it flashes the MIL.
At the same time the PCM also sets a Diagnostic
Trouble Code (DTC).
For signals that can trigger the MIL (Check
Engine Lamp) refer to Group 25, On-Board
Dianostics.
The MIL can also display diagnostic trouble codes.
Cycle the ignition switch on, off, on, off, on, within 5
seconds and any diagnostic trouble codes stored in
the PCM will be displayed. Refer to On-Board Diag-
nostics in Group 25, Emission Control Systems Diag-
nostic Trouble Code Descriptions.
RADIATOR FAN RELAYS—PCM OUTPUT
The PCM energizes the radiator fans through
either the low or high speed radiator fan relay. The
PCM controls the ground circuit for the solenoid side
of the relay. Power for both relay solenoids is sup-
plied through a 10 amp fuse in the PDC. Power for
both relay contacts is supplied power through a 40
amp fuse in the PDC. Refer to Group 8W - Wiring
Diagrams for circuit information.
The PCM monitors the A/C compressor discharge
(high side) pressure through the air conditioning
pressure transducer. Depending on engine coolant
temperature and A/C system high side pressure, both
fans operate at either low or high speed.
The radiator fan relays are located in the PDC.
The inside top of the PDC cover has a label showing
relay and fuse location.
SPEED CONTROL RELAY—PCM OUTPUT
When the operator engages the speed control PCM
receives a input from the speed control On switch. In
response to the input, the PCM grounds the coil side
of the speed control relay. The ignition switch sup-
plies power to the coil and contact sides of the relay.
When energized, the speed control relay supplies bat-
tery voltage to the speed control vacuum and vent
servos. Refer to Group 8H for speed control informa-
tion.
SPEED CONTROL SERVOS—PCM OUTPUT
The PCM operates the speed control vacuum and
vent servos. The PCM supplies a ground for both ser-
vos. The speed control relay supplies, also operated
by the PCM, supplies battery voltage to the servos.
When the PCM supplies a ground to the vacuum
servo, the speed control system opens the throttle
plate to obtain or maintain the selected road speed.
When the PCM supplies a ground to the vent servo,
the speed control system releases the throttle plate.
The PCM balances the two servos to maintain the set
speed. Refer to Group 8H for speed control informa-
tion.
TACHOMETER—PCM OUTPUT
The tachometer receives its information across the
CCD Bus from the Body Control Module (BCM).
Information on engine RPM is transmitted from the
Powertrain Control Module (PCM) across the CCD
Bus to the BCM. The BCM calculates the position of
the tachometer pointer based on the input from the
PCM and adjusts the position of the gauge pointer to
Fig. 34 Ignition Coil—2.5L
IGNITION COIL
COIL TOWER
DISTRIBUTOR HOUSING
JA
FUEL SYSTEM
14 - 41
DESCRIPTION AND OPERATION (Continued)
Содержание Stratus LHD 1997
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Страница 816: ...Fig 4 Engine Connections 2 0L 2 4L JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 9 DESCRIPTION AND OPERATION Continued ...
Страница 817: ...Fig 5 Engine Connections 2 5L 8W 90 10 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 818: ...Fig 6 Transmission Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 11 DESCRIPTION AND OPERATION Continued ...
Страница 819: ...Fig 7 Steering Column Connections 8W 90 12 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 820: ...Fig 8 Instrument Panel Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 13 DESCRIPTION AND OPERATION Continued ...
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Страница 822: ...Fig 10 Junction Block Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 15 DESCRIPTION AND OPERATION Continued ...
Страница 823: ...Fig 11 HVAC Connections 8W 90 16 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 824: ...Fig 12 Body Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 17 DESCRIPTION AND OPERATION Continued ...
Страница 825: ...Fig 13 Body Connections 8W 90 18 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 826: ...Fig 14 Body Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 19 DESCRIPTION AND OPERATION Continued ...
Страница 827: ...Fig 15 Roof Connections 8W 90 20 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 829: ...Fig 18 Deck Lid Connections 8W 90 22 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 833: ...Fig 5 Engine Splices 2 0L 2 4L 8W 95 4 8W 95 SPLICE LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 834: ...Fig 6 Engine Splices 2 5L JA 8W 95 SPLICE LOCATIONS 8W 95 5 DESCRIPTION AND OPERATION Continued ...
Страница 835: ...Fig 7 Body Splices 8W 95 6 8W 95 SPLICE LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 836: ...Fig 8 Deck Lid Splices Fig 9 Door Splices JA 8W 95 SPLICE LOCATIONS 8W 95 7 DESCRIPTION AND OPERATION Continued ...
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Страница 975: ...Adapter 6887 Camshaft Seal Installer 6863 9 138 2 5L ENGINE JA SPECIAL TOOLS Continued ...
Страница 995: ...Fig 2 Exhaust System Leaded Fuel 11 2 EXHAUST SYSTEM AND INTAKE MANIFOLD JA GENERAL INFORMATION Continued ...
Страница 1001: ...13 6 BUMPERS AND FRAME JA SPECIFICATIONS Continued ...
Страница 1065: ...Fuel Line Adapter 1 4 14 64 FUEL SYSTEM JA SPECIAL TOOLS Continued ...
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Страница 1106: ...SPECIAL TOOLS POWER STEERING PUMP Installer C 4063B Puller C 4333 P S System Analyzer 6815 JA STEERING 19 35 ...
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Страница 1287: ...SPECIFICATIONS SUNROOF COMPONENTS 23 16 BODY JA ...
Страница 1318: ...SPECIAL TOOLS BODY REMOVER MOLDINGS C 4829 STICK TRIM C4755 JA BODY 23 47 ...
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Страница 1401: ...FASTENER IDENTIFICATION 6 INTRODUCTION JA GENERAL INFORMATION Continued ...
Страница 1404: ...METRIC CONVERSION JA INTRODUCTION 9 GENERAL INFORMATION Continued ...
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Страница 1533: ...Remover 6787 Cooling System Tester 7700 Seal Remover 7794 a 21 126 TRANSAXLE JA SPECIAL TOOLS Continued ...