OPERATION
As a functional test, the MIL illuminates at key-on
before engine cranking. Whenever the Powertrain
Control Module (PCM) sets a Diagnostic Trouble
Code (DTC) that affects vehicle emissions, it illumi-
nates the MIL. If a problem is detected, the PCM
sends a message to the instrument cluster to illumi-
nate the lamp. The PCM illuminates the MIL only
for DTC’s that affect vehicle emissions. There are
some monitors that may take two consecutive trips,
with a detected fault, before the MIL is illuminated.
The MIL stays on continuously when the PCM has
entered a Limp-In mode or identified a failed emis-
sion component. Refer to the Diagnostic Trouble Code
charts in this group for emission related codes.
Also, the MIL either flashes or illuminates contin-
uously when the PCM detects active engine misfire.
Refer to Misfire Monitoring in this section.
Additionally, the PCM may reset (turn off) the MIL
when one of the following occur:
•
PCM does not detect the malfunction for 3 con-
secutive trips (except misfire and Fuel system Moni-
tors).
•
PCM does not detect a malfunction while per-
forming three successive engine misfire or fuel sys-
tem tests. The PCM performs these tests while the
engine is operating within
6
375 RPM of and within
10% of the load of the operating condition at which
the malfunction was first detected.
STATE DISPLAY TEST MODE
OPERATION
The switch inputs to the Powertrain Control Mod-
ule (PCM) have two recognized states; HIGH and
LOW. For this reason, the PCM cannot recognize the
difference between a selected switch position versus
an open circuit, a short circuit, or a defective switch.
If the State Display screen shows the change from
HIGH to LOW or LOW to HIGH, assume the entire
switch circuit to the PCM functions properly. Connect
the DRB scan tool to the data link connector and
access the state display screen. Then access either
State Display Inputs and Outputs or State Display
Sensors.
CIRCUIT ACTUATION TEST MODE
OPERATION
The Circuit Actuation Test Mode checks for proper
operation of output circuits or devices the Powertrain
Control Module (PCM) may not internally recognize.
The PCM attempts to activate these outputs and
allow an observer to verify proper operation. Most of
the tests provide an audible or visual indication of
device operation (click of relay contacts, fuel spray,
etc.). Except for intermittent conditions, if a device
functions properly during testing, assume the device,
its associated wiring, and driver circuit work cor-
rectly. Connect the DRB scan tool to the data link
connector and access the Actuators screen.
DIAGNOSTIC TROUBLE CODES
OPERATION
A Diagnostic Trouble Code (DTC) indicates that the
Powertrain Control Module (PCM) has recognized an
abnormal condition in the system.
DTC’s are the results of a system or circuit
failure, but do not directly identify the failed
component or components.
Technicians must retrieve stored DTC’s by connect-
ing the DRB III scan tool (or an equivalent scan tool)
to the 16–way data link connector. This connector is
located on the lower edge of the instrument panel
near the steering column.
OBTAINING DTC’s
WARNING: APPLY
PARKING
BRAKE
AND/OR
BLOCK WHEELS BEFORE PERFORMING ANY TEST
ON AN OPERATING ENGINE.
(1) Connect the DRB scan tool to data link (diag-
nostic) connector.
(2) Turn the ignition switch on, access Read Fault
Screen. Record all the DTC’s shown on the DRB scan
tool.
(3) To erase DTC’s, use the Erase Trouble Code
data screen on the DRB scan tool.
NOTE: For a list of DTC’s, refer to the following
charts.
Fig. 1 Data Link (Diagnostic) Connector Location
25 - 2
EMISSION CONTROL SYSTEMS
TJ
DESCRIPTION AND OPERATION (Continued)
Содержание Wrangler 1999
Страница 1: ...HOFRPH WR WKH UDQJOHU OHFWURQLF 6HUYLFH 0DQXDO OLFN 2Q 7KH RJR 7R HJLQ...
Страница 7: ...FASTENER IDENTIFICATION TJ INTRODUCTION 5 GENERAL INFORMATION Continued...
Страница 8: ...FASTENER STRENGTH 6 INTRODUCTION TJ GENERAL INFORMATION Continued...
Страница 10: ...METRIC CONVERSION 8 INTRODUCTION TJ GENERAL INFORMATION Continued...
Страница 28: ...Fig 1 Wheel Alignment Measurements 2 2 SUSPENSION TJ DESCRIPTION AND OPERATION Continued...
Страница 60: ...FRONT AXLES DIAGNOSIS 3 18 DIFFERENTIAL AND DRIVELINE TJ DIAGNOSIS AND TESTING Continued...
Страница 61: ...CONTINUED TJ DIFFERENTIAL AND DRIVELINE 3 19 DIAGNOSIS AND TESTING Continued...
Страница 86: ...Fig 72 Gear Tooth Contact Patterns 3 44 DIFFERENTIAL AND DRIVELINE TJ ADJUSTMENTS Continued...
Страница 95: ...DIAGNOSIS CHART TJ DIFFERENTIAL AND DRIVELINE 3 53 DIAGNOSIS AND TESTING Continued...
Страница 96: ...DIAGNOSIS CHART CONTINUED 3 54 DIFFERENTIAL AND DRIVELINE TJ DIAGNOSIS AND TESTING Continued...
Страница 120: ...Fig 75 Gear Tooth Contact Patterns 3 78 DIFFERENTIAL AND DRIVELINE TJ ADJUSTMENTS Continued...
Страница 125: ...Hub Puller 6790 Dial Indicator C 3339 TJ DIFFERENTIAL AND DRIVELINE 3 83 SPECIAL TOOLS Continued...
Страница 130: ...DIAGNOSIS CHART 3 88 DIFFERENTIAL AND DRIVELINE TJ DIAGNOSIS AND TESTING Continued...
Страница 131: ...DIAGNOSIS CHART CONTINUED TJ DIFFERENTIAL AND DRIVELINE 3 89 DIAGNOSIS AND TESTING Continued...
Страница 154: ...Fig 75 Gear Tooth Contact Patterns 3 112 DIFFERENTIAL AND DRIVELINE TJ ADJUSTMENTS Continued...
Страница 198: ...Fig 2 Clutch Components And Inspection TJ CLUTCH 6 3 DIAGNOSIS AND TESTING Continued...
Страница 200: ...DIAGNOSTIC CHART TJ CLUTCH 6 5 DIAGNOSIS AND TESTING Continued...
Страница 201: ...DIAGNOSTIC CHART 6 6 CLUTCH TJ DIAGNOSIS AND TESTING Continued...
Страница 202: ...DIAGNOSTIC CHART CONTINUED TJ CLUTCH 6 7 DIAGNOSIS AND TESTING Continued...
Страница 203: ...DIAGNOSTIC CHART CONTINUED 6 8 CLUTCH TJ DIAGNOSIS AND TESTING Continued...
Страница 302: ...Fig 1 Instrument Cluster Actuator Test 8E 6 INSTRUMENT PANEL SYSTEMS TJ DIAGNOSIS AND TESTING Continued...
Страница 322: ......
Страница 437: ...Wiring Diagram Symbols 8W 01 6 8W 01 GENERAL INFORMATION TJ DESCRIPTION AND OPERATION Continued...
Страница 617: ...Fig 1 Front End Wiring Connectors TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 7 DESCRIPTION AND OPERATION Continued...
Страница 620: ...Fig 4 Engine Compartment Connectors LHD 8W 90 10 8W 90 CONNECTOR GROUND LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 623: ...Fig 8 Windshield Wiper Motor RHD TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 13 DESCRIPTION AND OPERATION Continued...
Страница 627: ...Fig 12 Engine Grounds TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 17 DESCRIPTION AND OPERATION Continued...
Страница 630: ...Fig 15 Dash Panel Connectors LHD 8W 90 20 8W 90 CONNECTOR GROUND LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 631: ...Fig 16 Dash Panel Connectors RHD TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 21 DESCRIPTION AND OPERATION Continued...
Страница 635: ...Fig 20 Steering Column Connectors TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 25 DESCRIPTION AND OPERATION Continued...
Страница 637: ...Fig 22 Body Connectors LHD TJ 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 27 DESCRIPTION AND OPERATION Continued...
Страница 638: ...Fig 23 Rear Body Wiring Connectors RHD 8W 90 28 8W 90 CONNECTOR GROUND LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 643: ...Fig 1 Engine Compartment Splices Front 8W 95 4 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 644: ...Fig 2 Engine Compartment Splices Rear LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 5 DESCRIPTION AND OPERATION Continued...
Страница 645: ...Fig 3 Engine Compartment Splices Rear RHD 8W 95 6 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 646: ...Fig 4 Engine Wiring Splices LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 7 DESCRIPTION AND OPERATION Continued...
Страница 647: ...Fig 5 Engine Wiring Splices RHD 8W 95 8 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 648: ...Fig 6 Engine Wiring Splices LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 9 DESCRIPTION AND OPERATION Continued...
Страница 649: ...Fig 7 Engine Wiring Splices RHD 8W 95 10 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 650: ...Fig 8 Dash Panel Wiring Splices LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 11 DESCRIPTION AND OPERATION Continued...
Страница 651: ...Fig 9 Dash Panel Wiring Splices RHD 8W 95 12 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 652: ...Fig 10 Instrument Panel Wiring Splices LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 13 DESCRIPTION AND OPERATION Continued...
Страница 653: ...Fig 11 Instrument Panel Wiring Splices RHD 8W 95 14 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 654: ...Fig 12 Body Wiring Splices LHD TJ 8W 95 SPLICE LOCATIONS 8W 95 15 DESCRIPTION AND OPERATION Continued...
Страница 655: ...Fig 13 Body Wiring Splices RHD 8W 95 16 8W 95 SPLICE LOCATIONS TJ DESCRIPTION AND OPERATION Continued...
Страница 671: ...Oil Lubrication System 2 5L Engine 9 16 2 5L ENGINE TJ DESCRIPTION AND OPERATION Continued...
Страница 713: ...Oil Lubrication System 4 0L Engine 9 58 4 0L ENGINE TJ DESCRIPTION AND OPERATION Continued...
Страница 754: ...Fig 1 Exhaust System 2 5L Engine Fig 2 Exhaust System 4 0L Engine 11 2 EXHAUST SYSTEM TJ GENERAL INFORMATION Continued...
Страница 764: ...SPECIFICATIONS FRAME DIMENSIONS FRAME SIDE VIEW TJ FRAME AND BUMPERS 13 7...
Страница 765: ...FRAME TOP VIEW 13 8 FRAME AND BUMPERS TJ SPECIFICATIONS Continued...
Страница 831: ...Fig 1 Recirculating Ball Type Gear 19 12 STEERING TJ DESCRIPTION AND OPERATION Continued...
Страница 883: ...6747 1A Adapter Fixture MD 998805 Installer Seal TJ TRANSMISSION AND TRANSFER CASE 21 37 SPECIAL TOOLS Continued...
Страница 923: ...Fig 1 30 32 RH Automatic Transmission TJ TRANSMISSION AND TRANSFER CASE 21 77 GENERAL INFORMATION Continued...
Страница 994: ...HYDRAULIC FLOW IN PARK NEUTRAL 21 148 TRANSMISSION AND TRANSFER CASE TJ SCHEMATICS AND DIAGRAMS Continued...
Страница 995: ...HYDRAULIC FLOW IN D FIRST GEAR TJ TRANSMISSION AND TRANSFER CASE 21 149 SCHEMATICS AND DIAGRAMS Continued...
Страница 996: ...HYDRAULIC FLOW IN D SECOND GEAR 21 150 TRANSMISSION AND TRANSFER CASE TJ SCHEMATICS AND DIAGRAMS Continued...
Страница 997: ...HYDRAULIC FLOW IN D THIRD GEAR TJ TRANSMISSION AND TRANSFER CASE 21 151 SCHEMATICS AND DIAGRAMS Continued...
Страница 999: ...HYDRAULIC FLOW AT PART THROTTLE 3 2 KICKDOWN TJ TRANSMISSION AND TRANSFER CASE 21 153 SCHEMATICS AND DIAGRAMS Continued...
Страница 1000: ...HYDRAULIC FLOW AT FULL THROTTLE 3 2 KICKDOWN 21 154 TRANSMISSION AND TRANSFER CASE TJ SCHEMATICS AND DIAGRAMS Continued...
Страница 1001: ...HYDRAULIC FLOW IN MANUAL SECOND TJ TRANSMISSION AND TRANSFER CASE 21 155 SCHEMATICS AND DIAGRAMS Continued...
Страница 1002: ...HYDRAULIC FLOW IN MANUAL LOW 21 156 TRANSMISSION AND TRANSFER CASE TJ SCHEMATICS AND DIAGRAMS Continued...
Страница 1003: ...HYDRAULIC FLOW IN REVERSE TJ TRANSMISSION AND TRANSFER CASE 21 157 SCHEMATICS AND DIAGRAMS Continued...
Страница 1004: ...HYDRAULIC FLOW IN MANUAL FIRST GEAR 1 21 158 TRANSMISSION AND TRANSFER CASE TJ SCHEMATICS AND DIAGRAMS Continued...
Страница 1005: ...HYDRAULIC FLOW IN MANUAL SECOND GEAR 2 TJ TRANSMISSION AND TRANSFER CASE 21 159 SCHEMATICS AND DIAGRAMS Continued...
Страница 1094: ...WELD LOCATIONS DASH COWL AND PLENUM TJ BODY 23 47 SPECIFICATIONS Continued...
Страница 1095: ...DASH COWL AND PLENUM 23 48 BODY TJ SPECIFICATIONS Continued...
Страница 1096: ...DASH COWL AND PLENUM TJ BODY 23 49 SPECIFICATIONS Continued...
Страница 1097: ...DASH COWL AND PLENUM 23 50 BODY TJ SPECIFICATIONS Continued...
Страница 1098: ...DASH COWL AND PLENUM TJ BODY 23 51 SPECIFICATIONS Continued...
Страница 1099: ...DASH COWL AND PLENUM SUPPORTS AND REINFORCEMENTS 23 52 BODY TJ SPECIFICATIONS Continued...
Страница 1100: ...DASH COWL AND PLENUM SUPPORTS AND REINFORCEMENTS TJ BODY 23 53 SPECIFICATIONS Continued...
Страница 1101: ...DASH COWL AND PLENUM SUPPORTS AND REINFORCEMENTS 23 54 BODY TJ SPECIFICATIONS Continued...
Страница 1102: ...DASH COWL AND PLENUM SUPPORTS AND REINFORCEMENTS TJ BODY 23 55 SPECIFICATIONS Continued...
Страница 1103: ...FRONT FLOOR STRAINER REINFORCEMENT AND COWL SIDE LOWER 23 56 BODY TJ SPECIFICATIONS Continued...
Страница 1104: ...FRONT FLOOR STRAINER REINFORCEMENT AND COWL SIDE LOWER TJ BODY 23 57 SPECIFICATIONS Continued...
Страница 1105: ...FRONT FLOOR STRAINER REINFORCEMENT AND COWL SIDE LOWER 23 58 BODY TJ SPECIFICATIONS Continued...
Страница 1106: ...FRONT FLOOR STRAINER REINFORCEMENT AND COWL SIDE LOWER TJ BODY 23 59 SPECIFICATIONS Continued...
Страница 1107: ...SIDE APERTURE 23 60 BODY TJ SPECIFICATIONS Continued...
Страница 1108: ...SIDE APERTURE TJ BODY 23 61 SPECIFICATIONS Continued...
Страница 1109: ...SIDE APERTURE 23 62 BODY TJ SPECIFICATIONS Continued...
Страница 1110: ...SIDE APERTURE TJ BODY 23 63 SPECIFICATIONS Continued...
Страница 1111: ...SIDE APERTURE 23 64 BODY TJ SPECIFICATIONS Continued...
Страница 1112: ...WHEELHOUSE TJ BODY 23 65 SPECIFICATIONS Continued...
Страница 1113: ...WHEELHOUSE 23 66 BODY TJ SPECIFICATIONS Continued...
Страница 1114: ...WHEELHOUSE TJ BODY 23 67 SPECIFICATIONS Continued...
Страница 1115: ...REAR FLOOR PAN AND REINFORCEMENTS 23 68 BODY TJ SPECIFICATIONS Continued...
Страница 1116: ...REAR FLOOR PAN AND REINFORCEMENTS TJ BODY 23 69 SPECIFICATIONS Continued...
Страница 1117: ...REAR FLOOR PAN AND REINFORCEMENTS 23 70 BODY TJ SPECIFICATIONS Continued...
Страница 1118: ...DOOR OUTER PANELS TJ BODY 23 71 SPECIFICATIONS Continued...
Страница 1119: ...DOOR OUTER PANELS 23 72 BODY TJ SPECIFICATIONS Continued...
Страница 1120: ...SEALER LOCATIONS APPLICATION METHODS TJ BODY 23 73 SPECIFICATIONS Continued...
Страница 1121: ...COWL AND PLENUM 23 74 BODY TJ SPECIFICATIONS Continued...
Страница 1122: ...COWL TOP END AND PLENUM TJ BODY 23 75 SPECIFICATIONS Continued...
Страница 1123: ...COWL AND WINDSHIELD OUTER PANEL INNER WHEELHOUSE 23 76 BODY TJ SPECIFICATIONS Continued...
Страница 1124: ...REAR FLOOR RISER AND OUTER BODY SEAMS REAR CORNER PANEL TJ BODY 23 77 SPECIFICATIONS Continued...
Страница 1125: ...HALF DOOR FULL DOOR 23 78 BODY TJ SPECIFICATIONS Continued...
Страница 1127: ...QUARTER WINDOW OPENING 23 80 BODY TJ SPECIFICATIONS Continued...
Страница 1128: ...ENGINE COMPARTMENT TJ BODY 23 81 SPECIFICATIONS Continued...
Страница 1146: ...Fig 10 Vacuum Circuits Heater Only 24 16 HEATING AND AIR CONDITIONING TJ DIAGNOSIS AND TESTING Continued...
Страница 1147: ...Fig 11 Vacuum Circuits Heater A C TJ HEATING AND AIR CONDITIONING 24 17 DIAGNOSIS AND TESTING Continued...