!
Fuel and Emrsslons
SoecialToofs .....,...."..,. 11-2
Component Locations
lndex ....................., ......... 11-3
Svstem Description
Vacuum Connections ................,,..,.. ......... 11-12
Electrical Connections ...............,.,.,... ....... 11-29
System Connectors ........,.,.,.......................... 1 1-51
Troubleshooting
Troubleshooting Procedures ................. .. 11-81
Engine Control Module/PowertrainControl Module TerminalAfiangement ....,.,..... 11-88
Diagnostic Trouble Code Chart .................,., 11.97
How to Read Flowcharts .,.......................... . 11-103
PGM-Fl System
System Description ...... 11-10,1
Troubleshooting Flowcharts
Engine Control Module/PowertrainContlol Module ........ 11-107
Manitold Absolute Pressure Sensor .....'. . ... 11-115
fntake Air Temperatuie Sensor ..... . . ., . 11'121
Engine Coolant Temperatuae Sensol ........., 11-128
Throttle Position Sensor ...................,........... 11-132
Primary Heated Orygen Sensor (Sensor 1l ... 11-139
Secondary Heated Oxygen Sensor(Sensor 21.................................................... 1 1-153
Heated Oxygen Sensor Heater ...................,. 11-157
Fuel Supply System ...... 11-164
Random Mislire ......., ..11-166
Misfire Detected in One Cylindsr ................. 11-167
Knock Sensor .,.,............ 11-170
CKP/TDC/CYP Sensor ................................... 11'172
Vehicle Speed Sensor ...........,......,...,.,........... 1t-176
Barometric Pressure Sensor ...............,......... I 1-178
Electrical Load Detector,.,,............................ 1 1-179
CKF Sensor .................... 11-183
ECM/PCM Internal Circuit ............................. I 1-188
A/T Signal {TMA/TMBI .................................. I 1-189
ldle Control System
System Doscriplion ............ 11-190
Troubleshooting Flowcharts
ldle Control System ...... 11-192
ldle Air Control Va1ve .................................... I 1-19i1
Starter Switch Signal .................................... 1 1'202
Air Conditioning Signal ................................. 11'201
Ahernator FR Signal .................................... . 1 1-208
BrakeSwitch Signal ..................................... f 1"210
Power Sleering Prossure Switch Signal ......11-212
A/T Gear Position Signal ............................... 11-216
Clutch Swiich Signal ................................-.... 11-214
ldte Speed Setting . .............11-220
Fuel Supply System
Fuel Lines .,...................,.,.,.,11-221
Fuef Tube/Ouick-Connect Fittings ..........,.,........ 11 -227
System Description ....'.... 11-230
Fuel Pressure .......,.,,........... 11-230
Fuef fniectors ......................11-232
Fu€f Pressure Regulator .....,.......................'...,. 11-231
Fuef Fifter ............................11-235
Fuel Pump .............'.......'.... 11-236
PGM-FI Main Relay .............11'237
Fuel Tank ................ ....,...'.'.' 11'211
Intake Air System
System Description ....-.-.....11-243
Air Cfeaner ...........,......."". .11-211
Throttle Cable .....................11-211
Throttfe Body ........ ..'... . . .,.11-211
Fuel Iniestion Air Control System ,.,.,....-........... 11-250
Emission Control System
System Description .-..........11-252
Taifpip€ Emission ...............11-252
Three Way Catafytic Convert€r ............,.,,.,.,.,.... 11 -252
Exhaust Gas Racirculaiion System ...,.,,,,.,.,.,.,,. 11'254
Positive Crankcas€ Ventilation System .... . . .. 11-266
Evaoorative Emission Controls ..................,,..,.,. 11 -267
I
Engine Control Module/Powertrain Control Module (ECM/PCM)
t'96 - 98 Models,'99 - 00 Dl6Y5 engine with M/Tl
L
NOTE: lf th is svmptom is intermittent, check for a loose fuse No. 25 {METER 7.5 A) in the
underdash {use/relay box, a poor connection at ECM/PCM terminal A18, or an intermit
tent ooen in the GRN/ORN wire between the ECM/PCM (A18) and the gauge assemblv.
ECM/PCM CONNECTOR A I32PIPGl {BLKI
Wire side ot female terminals
ECM/PCM CONNECTOR A (32P}
Wire side of female terminals
(cont'd)
11-107
The Malfunc{ion Indicator Lamp
{MlLl never comes on (even lor
two secondsl atter ignition is
turned on.
Turn the ignition switch ON (ll).
- Repair short or open in thewile botwoen No. 25 {M€TERI
17,5 Altus€ and gau99 assem'
bty.- Replaco No.25 IMETERI (7,5
A)tuse.
ls the low oil pressure light on?
Try to start the engine.
Does the engine stan?
Check lor an open in the wiles
{PG linosl:1. Turn the ignition switch ON (ll).
2. ldeasure vo ltage betweenbody ground and ECM/PCMconnector terminals A10 andA23 individually.
Check tor an open in the wire ot
bulb (MlL line):1. Turn the ignition switch OFF.
2. Connect the ECM/PCM con-nector terminal A'18 to bodyground with a jumper wire.3. Turn the ignition switch ON (ll).
Repair open in the wire(s)
between ECM/PCM and G101(localod at the thetmostat hous_ingl that had more than 1.0 V.
ls thore less than 1.0 V?
Substituto . known-good ECM/PCM and recheck. It symptom/indication go6s away, roPlace
the origin.l ECM/PCM.
- Repair open in th€ wiresbetwoen ECM/PCM lAl8l andgaug6 a$embly.- Replace the MIL bulb,
ls the MIL on?
Substitute a known-good ECM/
PCM and .echeck. lf symptom/indication goes away, replacothe origin.l ECM/PCM.
268l011
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MrL I luanpen wrnrIGRN/ORN) I
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