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1、15-1 GROUP 15 INTAKE AND EXHAUST CONTENTS GENERAL DESCRIPTION. . . . . . . . .15-2 INTAKE AND EXHAUST DIAGNOSIS15-2 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . 15-2 TROUBLESHOOTING STRATEGY . . . . . . 15-2 SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 15-2 SYMPTOM PROCEDURES . . . .
2、. . . . . . . . 15-2 SPECIAL TOOL. . . . . . . . . . . . . . . . .15-3 ON-VEHICLE SERVICE. . . . . . . . . . .15-4 INTAKE MANIFOLD TUNING SYSTEM CHECK 15-4 INTAKE MANIFOLD TUNING SOLENOID CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4 VACUUM TANK CHECK . . . . . . . . . . . . . .
3、 15-5 AIR CLEANER . . . . . . . . . . . . . . . . . .15-6 REMOVAL AND INSTALLATION . . . . . . . . 15-6 INTAKE MANIFOLD. . . . . . . . . . . . . .15-7 REMOVAL AND INSTALLATION . . . . . . . . 15-7 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 15-11 EXHAUST MANIFOLD . . . . . . . . . . .
4、.15-12 REMOVAL AND INSTALLATION . . . . . . . . 15-12 INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 15-12 EXHAUST PIPE AND MAIN MUFFLER15-13 REMOVAL AND INSTALLATION . . . . . . . . 15-13 SPECIFICATIONS . . . . . . . . . . . . . . .15-15 FASTENER TIGHTENING SPECIFICATIONS15-15 SERVICE SP
5、ECIFICATION . . . . . . . . . . . . 15-16 GENERAL DESCRIPTION TSB Revision INTAKE AND EXHAUST 15-2 GENERAL DESCRIPTION M1151000100338 The exhaust pipe is of three-piece type. INTAKE AND EXHAUST DIAGNOSIS INTRODUCTION M1151006900279 Intake leaks usually create driveability issues that are not obvious
6、ly related to the intake system. Exhaust leaks or abnormal noise is caused by cracks gaskets and fittings, or by when the exhaust pipe or muffler is damaged due to impacts during travel. The exhaust leaks from these sections and causes the exhaust noise to increase. There may be cases when the syste
7、m contacts the body and vibration noise is generated. TROUBLESHOOTING STRATEGY M1151007000279 Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find an intake or exhaust fault. 1. Gather information f
8、rom the customer. 2. Verify that the condition described by the customer exists. 3. Find the malfunction by following the Symptom Chart. 4. Verify malfunction is eliminated. SYMPTOM CHART M1151007100276 SYMPTOMINSPECTION PROCEDUREREFERENCE PAGE Exhaust Leakage1 P.15-2 Abnormal Noise2 P.15-3 SYMPTOM
9、PROCEDURES INSPECTION PROCEDURE 1: Exhaust Leakage DIAGNOSIS STEP 1. Start the engine. Have an assistant stay in the drivers seat. Raise the vehicle on a hoist. Have the assistant rev the engine while searching for exhaust leaks. Q: Is the exhaust leaking? YES : Go to Step 2. NO : The procedure is c
10、omplete. STEP 2. Check the gasket for cracks, damage. Q: Is the gasket damaged? YES : Replace the gasket, then go Step 1. NO : Go to Step 3. STEP 3. Check for loosening in each coupling section. Q: Is there any loosening in each section? YES : Tighten, then go to Step 1. NO : There is no action to b
11、e taken. SPECIAL TOOL TSB Revision INTAKE AND EXHAUST 15-3 INSPECTION PROCEDURE 2: Abnormal Noise DIAGNOSIS STEP 1. Start the engine. Have an assistant stay in the drivers seat. Raise the vehicle on a hoist. Have the assistant rev the engine while searching for exhaust leaks. Q: Is any abnormal nois
12、e generated? YES : Go to Step 2. NO : The procedure is complete. STEP 2. Check for missing parts in the muffler. Tap the muffler lightly to check for loose baffles, etc. Q: Are there any missing parts in the muffler? YES : Replace, then go to Step 1. NO : Go to Step 3. STEP 3. Check the hanger for c
13、racks. Q: Is the hanger cracked? YES : Replace, then go to Step 1. NO : Go to Step 4. STEP 4. Check for interference of the pipes and muffler with the body. Q: Are the pipes and muffler interfering with the body? YES : Repair, then go to Step 1. NO : Go to Step 5. STEP 5. Check the heat protectors.
14、Q: Are any heat protectors loose or damaged? YES : Tighten or replace, then go to Step 1. NO : Go to Step 6. STEP 6. Check the pipes, catalytic converters and muffler for damage. Q: Are the pipes, catalytic converters and muffler damaged? YES : Replace, then go to Step 1 (For the removal of the pipe
15、s, catalytic converters and muffler, refer to P.15-13). NO : There is no action to be taken. SPECIAL TOOL M1151000600281 TOOLTOOL NUMBER AND NAME SUPERSESSIONAPPLICATION MD998770 Oxygen sensor wrench MD998770-01 or General service tool Removal and installation of heated oxygen sensor ON-VEHICLE SERV
16、ICE TSB Revision INTAKE AND EXHAUST 15-4 ON-VEHICLE SERVICE INTAKE MANIFOLD TUNING SYSTEM CHECK M1151001700065 1. Warm up the engine. AK200808 INTAKE MANIFOLD TUNING SOLENOID INTAKE MANIFOLD TUNING ACTUATOR VACUUM GAUGE AC 2. Disconnect the vacuum hose from the intake manifold tuning (IMT) actuator, and then connect a vacuum gauge via the Tee-fitting. 3. Start the engine and verify that a vacuum is applied to the vacuum gauge. 4. As described in the chart below, vary the engine speed to inspec
