Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Powertrain On-Board Diagnostic (OBD) System Check performed?
| --
|
Go to Step
2
| Go to
Powertrain On Board Diagnostic (OBD) System Check
|
2
|
- Carefully remove the Heated Oxygen Sensor (HO2S). Refer to Heated Oxygen Sensor (HO2S) Replacement
.
- Install the exhaust backpressure tester J 35314-A
in place of the HO2S.
- Start the engine and idle.
Is the reading greater than the specified value?
| 8.6 C.P.A.
(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
|
- Check the exhaust system for a collapsed pipe, internal muffler
failure, or any kind of heat distress.
- If a problem is found, repair as necessary.
Was a problem 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
|
