Step
| Action
| Values
| Yes
| No
|
1
| Did you perform the Powertrain
On-Board Diagnostic (OBD) System Check?
| --
|
Go to Step
2
| Go to
Powertrain On Board Diagnostic (OBD) System Check
|
2
|
- Carefully remove the oxygen sensor (O2S 1).
- Install the exhaust backpressure tester in place of the O2S 1.
- Start the engine and idle.
Is the reading more than the specified value?
| 8.6 kPa (1.25 psi)
|
Go to Step 4
|
Go to Step 3
|
3
|
- Increase the engine speed to the specified value.
- Observe the backpressure gauge.
Does the reading exceed the specified value?
| 2000 RPM
20.7 kPa (3 psi)
|
Go to Step
4
|
Go to Step 6
|
4
|
- Inspect the exhaust system for a collapsed pipe, internal muffler
failure or any kind of heat distress.
- If a condition is found, repair as necessary.
Was a condition found?
| --
|
Go to Step
6
|
Go to Step 5
|
5
| Replace
the catalytic converter. Refer to
Catalytic Converter Replacement
in Engine Exhaust.
Is the action complete?
| --
|
Go to Step
6
| --
|
6
| Operate the vehicle
within the conditions under which the original symptom was noted.
Does the system now operate properly?
| --
| System OK
|
Go to Step 2
|
