Exhaust System and Emission Controls

1. General Description

1.1 Exhaust System

Turbocharger

1.2 Emission Controls

Catalytic Converter

Oxygen Sensor System

EGR System

1.3 Exhaust System and Emission Control Identification

3. Troubleshooting

3.1 Basic Troubleshooting Principles

4. Exhaust System

4.1 Removing and Installing Exhaust System

Removing Exhaust System

Removing and Installing Front Pipe Spring Clamps

Installing Exhaust System

4.2 Catalytic Converter

Removing and Installing Catalytic Converter

Checking Catalytic Converter

Replacing Catalytic Converter Heat Shield

5. Oxygen Sensor System

5.1 Testing Oxygen Sensor System (CIS)

Measuring Frequency Valve Duty Cycle

Quick-Checking Oxygen Sensor System

Checking Thermoswitch

Checking Frequency Valve

Checking Oxygen Sensor System Control Unit

Checking Oxygen Sensor

Replacing Oxygen Sensor

Troubleshooting Oxygen Sensor Circuits

5.2 Testing Oxygen Sensor System (CIS-Electronic)

Testing Oxygen Sensor

Checking Control Unit Response

Replacing Oxygen Sensor

5.3 Testing Oxygen Sensor System (Digifant II and Digifant I)

Testing Oxygen Sensor Function

Replacing Oxygen Sensor

5.4 Testing Oxygen Sensor System (CIS-E Motronic)

Checking Oxygen Sensor and Control Unit Response

Replacing Oxygen Sensor

6. Exhaust Gas Recirculation System

Testing EGR System (Canada models only)

Testing EGR System (California models only)

7. Turbocharger (turbo diesel and ECO diesel only)

7.1 Removing and Installing Turbocharger

7.2 Testing Turbocharger Wastegate and Blow-Off Valve

8. Exhaust System and Emission Control Technical Data

I. Tightening Torques (engine codes: RD, PF, PL, 9A)

II. Tightening Torques (engine codes: GX, HT, RV, MZ)

III. Tightening Torques (engine codes: ME, MF, 1V)

IV. Turbocharger Technical Data (engine code: MF, 1V)

V. Oxygen Sensor System Technical Data (CIS)

VI. Oxygen Sensor System Technical Data (CIS-E)

VII. Oxygen Sensor System Technical Data (CIS-E Motronic)