I'm looking for some help on the following recurring codes. I'm also looking for a more complete list of error codes than my current eight page version that I downloaded from 97Vette.com over one year ago. That list makes no reference to any of these codes.

FYI: My sig lists all my current mods. The three that are probably most pertinent are the Superchips Micro Tuner (PCM), the SuperYank 3500 torque converter (slipage codes?), and the C5 Solutions Window Controller (Remote Function Faults?).

Thanks,

Jim

10 PCM P1870 HC
58 SDM B0090 H (This category of codes isn't even represented in my list)
60 IPC U1160H (This category of codes isn't even represented in my list)
BO RFA 1016 H Loss of Communication with PCM
BO RFA 1064 H Loss of Communication with BCM
BO RFA 1096 H Loss of Communication with IPC

 

Anybody?

Thanks,

Jim

 

:eek:

 

EvilDeed,
Try: http://www.corvetteplanet/search.cfm

White powder coat wheels look great!


[Modified by CarlB, 3:14 PM 10/17/2001]

 

P1870 - Transmission Component Slipping

The powertrain control module (PCM) monitors the difference between engine speed and transmission output speed. In D3 drive range with the TCC engaged, the engine speed should closely match the transmission output speed. In D4 drive range, with the TCC engaged, the TCC slip speed should be -20 to +40 RPM.

When the PCM detects excessive TCC slip when the TCC should be engaged, then DTC P1870 sets. DTC P1870 is a type B DTC.

Conditions for Running the DTC

No MAF sensor DTCs P0101, P0102 or P0103.
No TP sensor DTCs P0122 or P0123.
No VSS assembly DTCs P0502 or P0503.
No TCC solenoid valve DTC P0740.
No 1-2 SS valve DTC P0753.
No 2-3 SS valve DTC P0758.
No 3-2 SS valve assembly DTC P0785.
No TCC PWM solenoid valve DTC P1860.
The engine speed is greater than 450 RPM for 5 seconds.
The engine is not in fuel cutoff.
The engine torque is 40-400 lbs ft.
The TP angle is 10-50%.
The vehicle speed is 56-131 km/h (35-82 mph).
The speed ratio is 0.67-0.90 (the speed ratio is the engine speed divided by the transmission output speed).
The engine speed is 1200-3500 RPM.
The gear range is D4.
The commanded gear is not 1st gear.
The TFT is between 20-150°C (68-302°F).
The shift solenoid performance diagnostic counters are zero

Conditions for Setting the DTC

DTC P1870 sets if the following conditions occur for three TCC cycles.

The TCC is commanded ON for 5 seconds.
The TCC is at maximum duty cycle for 8 seconds.
The TCC slip speed is 80-800 RPM for 7 seconds.

Important
The following actions may occur before the DTC sets.


If the TCC is commanded ON and at maximum duty cycle for 5 seconds, the TP angle is 10-40%, and the transmission slip counter has incremented to either 1 or 2 (out of 3 to increment the fail counter for the current ignition cycle), then the following slip conditions and actions may increment the fail counter for the current ignition cycle: These conditions must occur sequentially.
Condition 1: If the TCC slip speed is 80-800 RPM for 7 seconds, then the PCM commands maximum line pressure and freezes shift adapts from being updated.
Condition 2: If Condition 1 is met and the TCC slip speed is 80-800 RPM for 7 seconds, then the PCM commands the TCC OFF for 1.5 seconds.
Condition 3: If Condition 2 is met and the TCC slip speed is 80-800 RPM for 7 seconds, then the fail counter on the current ignition cycle is incremented. The above slip conditions and actions may be disregarded if the TCC is commanded OFF at any time as a result of a driving maneuver (sudden acceleration or deceleration).

Action Taken When the DTC Sets

The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
The PCM commands maximum line pressure.
The PCM inhibits TCC engagement.
The PCM inhibits 4th gear if the transmission is in hot mode.
The PCM freezes shift adapts from being updated.
The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
The PCM stores DTC P1870 in PCM history during the second consecutive trip in which the Conditions for Setting the DTC are met.

Diagnostic Aids

Bronze material found in the transmission oil pan may indicate stator shaft bushing wear. If bushing wear is suspected, inspect the stator shaft and the input (turbine) shaft for damage.


DTC B0090 Active Switch Voltage Out of Range


Circuit Description
When you first turn the ignition switch to the RUN position, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM monitors the voltage levels at the PSIR enable and PSIR disable terminals of the SDM to determine the position of the inflatable restraint IP module switch. The SDM then performs the following continuous diagnostic tests on the deployment loops:

Deployment loop voltage out of range test
Deployment loop resistance measurement test
If the voltage out of range test detects a short to voltage condition, the resistance measurement test for that deployment loop will not be performed.

Conditions for Running the DTC
Ignition 1 voltage is within the normal operating voltage range.
PSIR enable circuit is not shorted to voltage.
PSIR disable circuit is not shorted to voltage.
Conditions for Setting the DTC
The voltage detected at PSIR enable terminal and PSIR disable terminal are less than 1.0 volts when the PASSENGER AIR BAG OFF LED is commanded OFF.
The voltage detected at PSIR enable terminal and PSIR disable terminal are greater than 1.0 volt when the PASSENGER AIR BAG OFF LED is commanded ON.
Action Taken When the DTC Sets
The inflatable restraint IP module switch is defaulted to a calibrated state.
The SDM commands ON the PASSENGER AIR BAG OFF LED via Class 2 serial data.
Conditions for Clearing the DTC
You issue a scan tool CLEAR CODES command.
A history DTC will clear once 255 malfunction free ignition cycles have occurred.
When the SDM detects that no DTCs are present, the SDM commands the AIR BAG warning lamp OFF.

Diagnostic Aids
The following can cause an intermittent condition:

A short between the PSIR enable and PSIR disable circuits.


The rest are communcation burps and are typically caused by certain functions taking priority over status type updates. Nothing to worry about.

 

Thanks guys.

Carl,

You're missing a ".com" in your address, but I found the site. :cool:

Shawn,

Where did you get the detailed descriptions and diagnotics listings. They are awesome.

I attribute the RFA, and IPC codes to the C5 Solutions Window Commander. I might have to contact them and see if there is a problem.

The PCM code sounds like it can be attributed to the torque converter. No problem, that is expected. I think I might check to see if Superchips can allow for the additional slippage in my Micro Tuner.

The SDM code sounds like I may have a problem with the airbag. I disable the passenger airbag and I have a large stereo that may be affecting the voltage draw when I turn the car on.

I'm relieved to find out what the codes mean. It doesn't sound like I should have any problem going fast. :)

Jim

 

I would not be concerned at all with the history (H) codes that are related to the different monitors trying to talk across the PCM bus at the same time and a loss of comm ocurrs.

As for the TCC issue, I find in doing a lot ot PCM trace analyzing over many different C5s, the major cause of this error is due to a non stock torque converter being used and the A4 was not re-calibrated for the T.C or the PCM tuner not properly tuning the A4 to match the new T.C stall and causing TCC to be triggered more often, degrading performance due to Torue management surging TC in and out.

 

try http://www.obdii.com/codes.asp :chevy