17 ENGINE AND EMISSION CONTROL

ENGINE CONTROL

GENERAL INFORMATION

SERVICE SPECIFICATIONS

TROUBLESHOOTING

INTRODUCTION TO ENGINE CONTROL SYSTEM DIAGNOSIS

ENGINE CONTROL SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY

SYMPTOM CHART

SYMPTOM PROCEDURES

Inspection Procedure 1: Throttle Valve will not Fully Open or Close <4G63, 4G64>

Inspection Procedure 2: Throttle Valve will not Fully Open or Close <4G69-L.H. drive vehicles>

Inspection Procedure 3: Throttle Valve will not Fully Open or Close <4G69-R.H. drive vehicles>

Inspection Procedure 4: Accelerator Pedal Operation is not Smooth (Over Acceleration) <4G63, 4G64, 4G69-L.H. drive vehicles>

Inspection Procedure 5: Accelerator Pedal Operation is not Smooth (Over Acceleration) <4G69-R.H. drive vehicles>

ON-VEHICLE SERVICE

ACCELERATOR CABLE CHECK AND ADJUSTMENT <4G63, 4G64>

ACCELERATOR CABLE CHECK AND ADJUSTMENT <4G69-L.H. DRIVE VEHICLES>

ACCELERATOR CABLE AND PEDAL <4G63, 4G64, 4G69-L.H. DRIVE VEHICLES>

REMOVAL AND INSTALLATION

ACCELERATOR PEDAL <4G69-R.H. DRIVE VEHICLES>

REMOVAL AND INSTALLATION

ACCELERATOR PEDAL POSITION SENSOR <4G69-L.H. DRIVE VEHICLES>

REMOVAL AND INSTALLATION

AUTO-CRUISE CONTROL <4G64-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM>

GENERAL INFORMATION

SPECIAL TOOLS

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

DIAGNOSIS FUNCTION

CHECK CHART FOR DIAGNOSIS CODES

DIAGNOSTIC TROUBLE CODE PROCEDURES

Code No.11 Auto-cruise Vacuum Pump Drive System

Code No.12 Vehicle speed signal system

Code No.14 Stop Lamp Switch System

Code No.15 Auto-cruise Control Switch System

Code No.16 Auto-cruise Control-ECU System

Code No.17 Throttle Position Sensor, Idle Position Signal System

CHECK CHART FOR TROUBLE SYMPTOMS

SYMPTOM PROCEDURES

Inspection Procedure 1: Communication with MUT-II/III is not Possible (Communication with Auto-Cruise Control-ECU only is not Possible).

Inspection Procedure 2: Even if Brake Pedal is Depressed, Auto-Cruise Control is not Cancelled.

Inspection Procedure 3: Even if Select Lever is Set to N Range, Auto-Cruise Control is not Cancelled.

Inspection Procedure 4: Even if Auto-Cruise Control CANCEL Switch is set to ON, Auto-Cruise Control is not Cancelled.

Inspection Procedure 5: Auto-Cruise Control cannot be Set.

Inspection Procedure 6: Hunting (Repeated Acceleration and Deceleration) Occurs at the Set Vehicle Speed.

Inspection Procedure 7: When the Auto-Cruise Control MAIN Switch is Turned ON, the Auto-Cruise Control Indicator Lamp dose not Illuminate. (However, the Auto-Cruise Control in Normal).

DATA LIST REFERENCE TABLE

CHECK AT ECU TERMINAL

ON-VEHICLE SERVICE

AUTO-CRUISE CONTROL SWITCH CHECK

AUTO-CRUISE CONTROL SYSTEM COMPONENT CHECK

AUTO-CRUISE CONTROL

REMOVAL AND INSTALLATION

AUTO-CRUISE CONTROL <4G69-VEHICLES WITH AUTO-CRUISE CONTROL SYSTEM>

GENERAL INFORMATION

SPECIAL TOOL

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

DIAGNOSIS FUNCTION

CHECK CHART FOR DIAGNOSIS CODES

DIAGNOSTIC TROUBLE CODE PROCEDURES

Code No.15 Auto-cruise Control Switch System

Code No.21 Cancel Latch Signal System

Code No.22 Stop Lamp Switch System

Code No. 23 Engine-A/T-ECU and its related components

CHECK CHART FOR TROUBLE SYMPTOMS

SYMPTOM PROCEDURES

Inspection Procedure 1: When the Brake Pedal is Depressed, Auto-cruise Control is not Cancelled.

Inspection Procedure 2: When the Selector Lever is Moved to "N" Range, Auto-cruise Control is not Cancelled.

Inspection Procedure 3: When the Auto-cruise Control "CANCEL" Switch is Set to ON, Auto-cruise Control is not Cancelled.

Inspection Procedure 4: Auto-cruise Control cannot be Set.

Inspection Procedure 5: Hunting (Repeated Acceleration and Deceleration) Occurs at the Set Vehicle Speed.

Inspection Procedure 6: When MAIN Switch is Turned "ON", Auto-cruise Control Indicator Lamp Inside Combination Meter does not Illuminate. (However, Auto-cruise Control is Normal).

DATA LIST REFERENCE TABLE

CHECK AT ECU TERMINAL

ON-VEHICLE SERVICE

AUTO-CRUISE CONTROL SWITCH CHECK

AUTO-CRUISE CONTROL SYSTEM COMPONENT CHECK

AUTO-CRUISE CONTROL

REMOVAL AND INSTALLATION

EMISSION CONTROL <MPI>

GENERAL INFORMATION

EMISSION CONTROL DEVICE REFERENCE TABLE

SERVICE SPECIFICATION(S)

SPECIAL TOOL

VACUUM HOSE

VACUUM HOSE PIPING DIAGRAM

VACUUM CIRCUIT DIAGRAM

VACUUM HOSE CHECK

VACUUM HOSE INSTALLATION

CRANKCASE EMISSION CONTROL SYSTEM

GENERAL INFORMATION (CRANKCASE EMISSION CONTROL SYSTEM)

COMPONENT LOCATION (CRANKCASE EMISSION CONTROL SYSTEM)

POSITIVE CRANKCASE VENTILATION SYSTEM CHECK

POSITIVE CRANKCASE VENTILATION (PCV) VALVE CHECK

EVAPORATIVE EMISSION CONTROL SYSTEM

GENERAL INFORMATION (EVAPORATIVE EMISSION CONTROL SYSTEM) <4G63, 4G69>

CHECK VALVE CHECK <4G63-DOHC>

COMPONENT LOCATION (EVAPORATIVE EMISSION CONTROL SYSTEM)

PURGE CONTROL SYSTEM CHECK

PURGE PORT VACUUM CHECK

PURGE CONTROL SOLENOID VALVE CHECK

GENERAL INFORMATION (EVAPORATIVE EMISSION CONTROL SYSTEM) <4G64>

CHECK VALVE CHECK

REMOVAL AND INSTALLATION

INSPECTION

EXHAUST GAS RECIRCULATION (EGR) SYSTEM

GENERAL INFORMATION (EGR SYSTEM)

COMPONENT LOCATION (EGR SYSTEM)

EGR SYSTEM CHECK <4G63, 4G64>

EGR VALVE CHECK <4G63, 4G64>

EGR VALVE (STEPPER MOTOR) CHECK <4G69>

EGR PORT VACUUM CHECK <4G63, 4G64>

EGR CONTROL SOLENOID VALVE CHECK <4G63, 4G64>

REMOVAL AND INSTALLATION <4G63-SOHC, 4G64>

REMOVAL AND INSTALLATION <4G63-DOHC>

REMOVAL AND INSTALLATION <4G69>

CATALYTIC CONVERTER

REMOVAL AND INSTALLATION