Resonator
Some exhaust systems are equipped with a resonator. The resonator, located either before or after the muffler, allows the use of mufflers with less back pressure. Resonators are used when vehicle characteristics require specific exhaust tuning.
Catalytic Converter
The catalytic converter is an emission control device used to reduce hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) pollutants from the exhaust gas.
The catalytic converter is comprised of a ceramic monolith substrate, supported in insulation and housed within a sheet metal shell. The substrate may be washcoated with 3 noble metals
- Platium (Pt)
- Palladium (Pd)
- Rhodium (Rh)
The catalyst in the catalytic converter is not serviceable.
Muffler
The exhaust muffler reduces the noise levels of the engine exhaust by the use of tuning tubes. The tuning tubes create channels inside the exhaust muffler that lower the sound levels created by the combustion of the engine.
Symptoms - Engine Exhaust
- Review the exhaust system description in order to familiarize yourself with the exhaust system components and the intended function of the components. Refer to «EXHAUST SYSTEM DESCRIPTION»(ref-652240-S31589965152014082300000) .
- All diagnostics on a vehicle should follow a logical process. Strategy Based Diagnostics is a uniform approach for repairing all systems. The diagnostic flow is the place to start when repairs are necessary and may always be used in order to resolve a system problem. For a detailed explanation, refer to «CAUTION: RETAINER»(ref-652229-S20487768742014082300000) .
Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating as designed.
Exhaust Leakage
| Condition | Action |
|---|---|
| Refer to WARNING: SERVICING EXHAUST SYSTEM . DEFINITION: An exhaust leak may show stains at the area of the leak. The leak may be felt by holding a hand close to the suspected areas or using a smoke pencil. The leak may make a popping or hissing noise. Refer to SYMPTOMS - ENGINE EXHAUST prior to beginning this table. | |
| Misaligned or improperly installed exhaust system components | Align and tighten the exhaust system components to the specifications. Refer to FASTENER TIGHTENING SPECIFICATIONS . Ensure the exhaust hangers are in the proper locations and not loose. |
| Exhaust leaks at the following connections: Exhaust manifold to pipe Flanges Pipe clamps | Tighten the components to the specifications. Refer to FASTENER TIGHTENING SPECIFICATIONS . |
| Seals or gaskets leaking; Exhaust manifold to cylinder head Exhaust pipes to exhaust manifold Catalytic converter connection | Replace the leaking seal or gasket. Refer to the affected components procedure for service. |
| Irregularities at the mating surfaces on the flange connections | Repair as required or replace the affected component. Refer to the affected components procedure for service. |
| Catalytic Converter cracked or broken | Replace the catalytic converter. Refer to CATALYTIC CONVERTER REPLACEMENT - LEFT SIDE (LF1) or CATALYTIC CONVERTER REPLACEMENT - RIGHT SIDE (LF1) . |
| Exhaust system component connection welds leaking | Replace the leaking component. Refer to the affected component's procedure for service. |
| Muffler or resonator, if equipped, damaged or leaking at the seams | Replace the affected muffler or resonator, if equipped. Refer to EXHAUST MUFFLER REPLACEMENT (LAU) or EXHAUST MUFFLER REPLACEMENT (LF1) . |
Time studies - Intake/exhaust
| Object code - ID | Description | Condition | Variant | Model year | Correction | Terminal | Time (hrs) |
|---|---|---|---|---|---|---|---|
| 25110-01 | Intake manifold | 2011 | 01 | 1.0 | |||
| 25110-02 | Intake manifold | A30YH | 2011 | 01 | 06 | 1.0 | |
| 25110-03 | Intake manifold | A28NER | 2011 | 01 | 06 | 0.6 | |
| 25110-04 | Intake manifold | 2011 | 01 | 08 | 1.4 | ||
| 25115-01 | Cover | 2011 | 01 | 0.1 | |||
| 25118-01 | Gasket, intake manifold | 2011 | 01 | 0.7 | |||
| 25118-02 | Gasket, intake manifold | 2011 | 01 | 06 | 1.0 | ||
| 25131-01 | Exhaust manifold | A30YH | 2011 | 01 | 04 | 2.7 | |
| 25131-02 | Exhaust manifold | A30YH | 2011 | 01 | 03 | 3.2 | |
| 25131-03 | Exhaust manifold | A28NER | 2011 | 01 | 2.4 | ||
| 25131-04 | Exhaust manifold | A28NER | 2011 | 01 | 3.0 | ||
| 25136-01 | Heat Shield | Exhaust Manifold Lower Heat Shield Replacement | 2011 | 01 | 08 | 1.6 | |
| 25136-02 | Heat Shield | A28NER | 2011 | 01 | 1.9 | ||
| 25136-03 | Heat Shield | A28NER | 2011 | 01 | 1.0 | ||
| 25136-04 | Heat Shield | Transmission Heat Shield Replacement | 2011 | 01 | 1.2 | ||
| 25200-01 | Exhaust system comp. | 2011 | 01 | 2.8 | |||
| 25200-02 | Exhaust system comp. | 2011 | 05 | 0.5 | |||
| 25211-01 | Front pipe | 2011 | 01 | 0.4 | |||
| 25222-01 | Silencer, rear | 2011 | 01 | 0.3 |
Correction
- 01 - Replacement
- 02 - Removal - Refit
- 03 - Renovate
- 04 - Paint
- 05 - Adjust
- 06 - Change comp. unit
- 07 - Lubricate - Clean - Polish
- 08 - Check/Fault search
- 09 - Expose
- 10 - Install new
- 11 - Transfer
- 01 - Replacement
- 02 - Removal - Refit
- 03 - Renovate
- 04 - Paint
- 05 - Adjust
- 06 - Change comp. unit
- 07 - Lubricate - Clean - Polish
- 08 - Check/Fault search
- 09 - Expose
- 10 - Install new
- 11 - Transfer