1998 NISSAN PICK-UP Repair Manual

MEASUREMENT POINTS
SBT460
BODY ALIGNMENT
Engine Compartment (Cont'd)
BT-45

Underbody
MEASUREMENT
2WD (Short wheelbase) models
SBT461
BODY ALIGNMENT
BT-46

MEASUREMENT POINTS
2WD (Short wheelbase) models
SBT462
BODY ALIGNMENT
Underbody (Cont'd)
BT-47

MEASUREMENT
2WDz4WD (Long wheelbase) models
SBT463
BODY ALIGNMENT
Underbody (Cont'd)
BT-48

MEASUREMENT POINTS
2WD4WD (Long wheelbase) models
SBT464
BODY ALIGNMENT
Underbody (Cont'd)
BT-49

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
DIAGNOSTIC TROUBLE CODE INDEX................... 1
Alphabetical & Numerical Index for DTC
(KA engine) ............................................................ 1
PRECAUTIONS AND PREPARATION..................... 2
Special Service Tools ............................................ 2
Commercial Service Tool....................................... 4
Supplemental Restraint System (SRS) ``AIR
BAG'' (4WD models).............................................. 4
Supplemental Restraint System (SRS) ``AIR
BAG'' (2WD models).............................................. 4
KA
PRECAUTIONS AND PREPARATION..................... 5
Engine Fuel & Emission Control System .............. 5
Precautions ............................................................ 6
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM..................................................................... 8
Circuit Diagram ...................................................... 8
System Diagram .................................................... 9
ECCS Component Parts Location ....................... 10
Vacuum Hose Drawing ........................................ 12
System Chart ....................................................... 13
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION..................................... 14
Multiport Fuel Injection (MFI) System.................. 14
Distributor Ignition (DI) System............................ 17
Air Conditioning Cut Control ................................ 18
Fuel Cut Control (at no load & high engine
speed) .................................................................. 18
EVAPORATIVE EMISSION SYSTEM..................... 19
Description ........................................................... 19
Inspection ............................................................. 19POSITIVE CRANKCASE VENTILATION................ 21
Description ........................................................... 21
Inspection ............................................................. 21
BASIC SERVICE PROCEDURE............................. 22
Fuel Pressure Release ........................................ 22
Fuel Pressure Check ........................................... 22
Injector Removal and Installation ........................ 23
Fast Idle Cam (FIC) Inspection and
Adjustment ........................................................... 24
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment ........................................................... 25
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION......................................................... 36
Introduction .......................................................... 36
Diagnostic Trouble Code (DTC) .......................... 36
Malfunction Indicator Lamp (MIL) ........................ 38
CONSULT ............................................................ 45
TROUBLE DIAGNOSIS - Introduction.................. 54
Introduction .......................................................... 54
Diagnostic Worksheet .......................................... 54
TROUBLE DIAGNOSIS - Work Flow..................... 56
Work Flow ............................................................ 56
Description for Work Flow ................................... 57
TROUBLE DIAGNOSIS - Basic Inspection.......... 58
Basic Inspection ................................................... 58
TROUBLE DIAGNOSIS - General Description..... 61
Fail-Safe Chart ..................................................... 61
Symptom Matrix Chart ......................................... 62
CONSULT Reference Value in Data Monitor
Mode .................................................................... 64
Major Sensor Reference Graph in Data
Monitor Mode ....................................................... 66
ECM Terminals and Reference Value ................. 68
EC

TROUBLE DIAGNOSIS FOR POWER SUPPLY.... 75
Main Power Supply and Ground Circuit .............. 75
TROUBLE DIAGNOSIS FOR ``CAMSHAFT
POSI SEN'' (DTC 11).............................................. 82
Camshaft Position Sensor (CMPS) ..................... 82
TROUBLE DIAGNOSIS FOR ``MASS AIR
FLOW SEN'' (DTC 12)............................................ 89
Mass Air Flow Sensor (MAFS) ............................ 89
TROUBLE DIAGNOSIS FOR ``COOLANT TEMP
SEN'' (DTC 13)........................................................ 95
Engine Coolant Temperature Sensor (ECTS) ..... 95
TROUBLE DIAGNOSIS FOR ``IGN SIGNAL-
PRIMARY'' (DTC 21)............................................... 99
Ignition Signal ...................................................... 99
TROUBLE DIAGNOSIS FOR ``OVER HEAT''
(DTC 28)................................................................. 106
Overheat ............................................................ 106
TROUBLE DIAGNOSIS FOR ``INT AIR TEMP
SEN'' (DTC 41)...................................................... 109
Intake Air Temperature Sensor ......................... 109
TROUBLE DIAGNOSIS FOR ``THROTTLE POSI
SEN'' (DTC 43)...................................................... 113
Throttle Position Sensor .................................... 113
TROUBLE DIAGNOSIS FOR
NON-DETECTABLE ITEMS.................................. 118
Vehicle Speed Sensor (VSS) ............................ 118
Heated Oxygen Sensor (HO2S)
- LHD Models - .................................................. 123
Heated Oxygen Sensor Heater
- LHD Models - .................................................. 127
Idle Air Control Valve (IACV) - Auxiliary Air
Control (AAC) Valve .......................................... 131
Neutral Position Switch ...................................... 136
EVAP Canister Purge Control Solenoid Valve .. 140
Injector ............................................................... 144
Start Signal ........................................................ 149
Fuel Pump.......................................................... 151
Power Steering Oil Pressure Switch ................. 157
Swirl Control Valve Control Solenoid Valve ...... 161
IACV-FICD Solenoid Valve ................................ 168
MIL & Data Link Connectors ............................. 173
TD
INJECTION SYSTEM............................................ 176
Fuel System ....................................................... 176
INJECTION PUMP................................................. 178
Inspection ........................................................... 178
Removal ............................................................. 178
Installation and Adjustment................................ 180
Disassembly ....................................................... 183
Load Timer Adjustment...................................... 183
Start Q Adjustment Lever .................................. 184
INJECTION NOZZLE............................................. 186Removal and Installation ................................... 186
Disassembly ....................................................... 186
Inspection ........................................................... 187
Cleaning ............................................................. 187
Assembly............................................................ 189
Test and Adjustment .......................................... 189
FUEL SYSTEM CHECK........................................ 191
Bleeding Fuel System ........................................ 191
Bleeding Fuel Filter ............................................ 192
Checking Priming Pump .................................... 192
Checking Fuel Filter Switch ............................... 192
POSITIVE CRANKCASE VENTILATION.............. 193
Description ......................................................... 193
Inspection ........................................................... 193
QUICK-GLOW SYSTEM........................................ 194
Component Parts Location ................................ 194
Circuit Diagram .................................................. 195
Description ......................................................... 196
Wiring Diagram .................................................. 197
Glow Control Unit Circuit Inspection (For Cold
Areas)................................................................. 203
Glow Control Unit Circuit Inspection (Except
for Cold Areas)................................................... 206
Component Inspection ....................................... 208
EGR SYSTEM........................................................ 210
Component Parts Location ................................ 210
Description ......................................................... 211
Operation ........................................................... 212
Wiring Diagram .................................................. 213
System Inspection.............................................. 217
Component Inspection ....................................... 218
SOLENOID TIMER................................................ 220
Description ......................................................... 220
Operation ........................................................... 220
Wiring Diagram .................................................. 222
Inspection ........................................................... 224
FUEL CUT SYSTEM.............................................. 225
Wiring Diagram .................................................. 225
FUEL HEATER SYSTEM...................................... 226
Description ......................................................... 226
Wiring Diagram .................................................. 227
System Inspection.............................................. 228
Component Inspection ....................................... 228
FAST IDLE CONTROL CIRCUIT.......................... 230
Wiring Diagram .................................................. 230
Electrical Components Inspection ..................... 231
KA
SERVICE DATA AND SPECIFICATIONS (SDS). 232
General Specifications ....................................... 232
Inspection and Adjustment ................................ 232

TD
SERVICE DATA AND SPECIFICATIONS (SDS). 233
VE-type Injection Pump ..................................... 233Injection Nozzle.................................................. 233
Injection Pump Calibration Standard ................. 234
When you read wiring diagrams:
lRead GI section, ``HOW TO READ WIRING DIAGRAMS''.
lSee EL section, ``POWER SUPPLY ROUTING'' for power distribution circuit.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW
CHART IN TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENT''.