97 Acura RL Oxygen Sensor Monitor Not Ready

classic Classic list List threaded Threaded
4 messages Options
Reply | Threaded
Open this post in threaded view
|

97 Acura RL Oxygen Sensor Monitor Not Ready

FiendFX
Anyone knows how to complete this monitor? Customer already change both oxygen sensors prior to smog inspection and it had failed for monitors.
Reply | Threaded
Open this post in threaded view
|

Re: 97 Acura RL Oxygen Sensor Monitor Not Ready

Voltron

OBD-II Drive Cycle
(Taken from Understanding OBDII: Past, Present & Future)
The OBD-II drive cycle begins with a cold start (coolant temperature below
122 degrees F and the coolant and air temperature sensors within 11 degrees
of one another).

NOTE: The ignition key must not be on prior to the cold start otherwise the
heated oxygen sensor diagnostic may not run.
1. As soon as the engine starts, idle the engine in drive for two and a half
minutes with the A/C and rear defrost on. OBD-II checks oxygen sensor heater
circuits, air pump and EVAP purge.

2. Turn the A/C and rear defrost off, and accelerate to 55 mph at half
throttle. OBD-II checks for ignition misfire, fuel trim and canister purge.
Hold at a steady state speed of 55 mph for three minutes. OBD-II monitors
EGR, air pump, O2 sensors and canister purge.

3. Decelerate (coast down) to 20 mph without braking or depressing the
clutch. OBD-II checks EGR and purge functions.

4. Accelerate back to 55 to 60 mph at half throttle. OBD-II checks misfire,
fuel trim and purge again.

5. Hold at a steady speed of 55 to 60 mph for five minutes. OBD-II monitors
catalytic converter efficiency, misfire, EGR, fuel trim, oxygen sensors and
purge functions.

6. Decelerate (coast down) to a stop without braking. OBD-II makes a final
check of EGR and canister purge.
There are no stupid questions, just stupid people
Reply | Threaded
Open this post in threaded view
|

Re: 97 Acura RL Oxygen Sensor Monitor Not Ready

Moderator
Administrator
This post was updated on .
That sounds suspiciously like a GM drive cycle, jvolman.  Although it may be applicable to other makes and models, I wouldn't depend on it.

Here is one that is alleged to apply directly to a 97 TL:  warm up your dyno and bring a stopwatch and pen!

Reply | Threaded
Open this post in threaded view
|

Re: 97 Acura RL Oxygen Sensor Monitor Not Ready

FiendFX
Barry,

I saw something similar to that on ALLDATA. I thought there was a specific drive cycle for a specific monitor that's why I asked the question. Gonna be hard to help the customer on this one..