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post #1 of 6 (permalink) Old 04-13-2015, 09:25 PM Thread Starter
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Any ideas???

So I finally replaced all 5 of the sensors for the tire pressure monitoring system on my 300M Special. I programmed them all in and they all register pressure. BUT each time I start the car, the EVIC displays "Service Pressure System" still. I don't get it. I was looking forward to this message stopping after I got all new sensors and got them programmed in :/ I am open to ideas on what is going on or on what I may have missed.
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post #2 of 6 (permalink) Old 04-15-2015, 07:07 AM
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Are your pressures right??
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post #3 of 6 (permalink) Old 04-15-2015, 08:54 PM Thread Starter
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Quote:
Originally Posted by paintballdude05 View Post
Are your pressures right??
Yep, pressures are correct. If they were't I would get a different message than the one I am getting. What could possibly be serviced if all the sensors are new and transmitting and the EVIC is displaying???
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post #4 of 6 (permalink) Old 04-16-2015, 12:33 AM Thread Starter
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So I ran the self diagnostic mentioned in the below list and the EVIC works fine. I ran the test to see how often it is receiving signals from each sensor and it seems that the signals from the rears aren't reaching the EVIC nearly as often as the fronts. Does anyone know if there is an antenna the EVIC uses or something that I can reposition? Please read the below info and see the picture of my EVIC after 10 minutes of driving. As always, open to input

CRITICAL AND NON-CRITICAL PRESSURE ALERTS

A critical alert will be triggered when a tire pressure has gone below or above a set threshold pressure. Depending on what the condition is, the EVIC will request a chime and then display a LOW PRESSURE or HIGH PRESSURE message indicating the appropriate location.

The alert message will display for three seconds and then switch to the tire pressure trip screen. The tire pressure for the tire that has exceeded its threshold will blink at one second intervals on the graphic display. The blinking tire pressure will continue for the rest of the ignition cycle or until an EVIC button is pressed. If the display is removed without correcting the condition, it will reappear without a chime after 60 seconds to warn the driver of the low/high pressure condition. A non-critical alert will be triggered when low or high pressure threshold has been exceeded in the spare tire. The SPARE LOW PRESSURE or SPARE HIGH PRESSURE alert will be displayed for 60 seconds during each ignition ON cycle. If the pressure threshold is exceeded while the ignition is OFF, the alert will be delayed 8-10 seconds after ignition ON.

SYSTEM FAULTS

NOTE: The Remote Tire Pressure MonitorSensors (RTPM) are not internally
serviceable. For a Sensor Failure or LowBattery fault, the RTPM must be replaced.

There are four conditions that will cause a Tire Pressure Monitoring System fault to be set. All fault codes are associated with a specific wheel location.

1. If the EVIC detects a non-transmitting Sensor/ Transmitter in a road wheel for 10 minutes at a vehicle speed above (25 MPH), it will:

a. Store an active fault code.

b. Request a chime.

c. Display SERVICE TIRE PRESS SYSTEM.

d. Display a dashed line at the wheel location on the graphic display if the display is activated.

2. When the EVIC detects:

A low pressure sensor/transmitter battery status for 7 consecutive ignition cycles,
any sensor transmitting at a shorter than expected interval or, No valid pressure sensor ID from the sparetire for 20 consecutive ignition cycles spaced atleast one hour apart, it will:

a. Store an active fault code.

b. Request a chime.

c. Display SERVICE TIRE PRESS SYSTEM.

Use the DRBIII ( dealer scan tool) Input/Output function to further isolate the specific concern.

The DRBIII can be queried to determine theSensor/Transmitter status:

Invalid Pressure - The Sensor/Transmitter is reporting a negative pressure or a pressure above (63 psi).

Low Batt - The Sensor/Transmitter has reported a low battery status forsevenconsecutive ignition cycles.

Trained - The Sensor/Transmitter ID code is recognized by the EVIC.

Active - The vehicle is moving at (25 mph) and the Sensor/Transmitter is awake and

transmitting as expected by the EVIC.

SPARE WHEEL AUTO-LOCATE

If the spare tire is mounted on the vehicle, the EVIC will detect the relocation and determine from the sensor transmit intervals, which wheels are mounted and which one is now the spare. The spare tire sensor/transmitter transmits once per hour.

The sensor/transmitters in the mounted wheels transmit once per minute when the vehicle is moving at (25 mph).

REMOVE MAGNET FROM SPARE

A magnet is used to initiate a sensor ID transmission.In the EVIC training procedure, the spare wheel is the last in the sequence. If the magnet is left on the wheel, the sensor/transmitter will continue its ID transmission. If the EVIC detects 20
transmissions from the spare wheel in 60 seconds and the vehicle speed is above (25 mph), it will:

Request a chime.

Display REMOVE MAGNET FROM SPARE for 60 seconds per ignition-ON cycle.

TIRE PRESSURE UNAVAILABLE

The EVIC can detect high radio noise interference.

When the noise level is too high to distinguish a transmission from a sensor/transmitter, it will:

Display TIRE PRESSURE UNAVAILABLE for 5 seconds.

Request a chime.

Switch to the graphic display and show dashed lines instead of the tire pressure for the wheel(s) affected by the radio interference.

TIRE PRESSURE NOW AVAILABLE

If the TIRE PRESSURE UNAVAILABLE message was displayed because of radio noise interference, the EVIC will:

Display TIRE PRESSURE NOW AVAILABLE for 5 seconds.

Request a chime.

When the noise level no longer interferes with

sensor/transmitter transmissions.

DIAGNOSING AND CLEARING SYSTEM FAULTS

NOTE: The TPM System relearn procedure

must be performed before servicing the

system.

All Tire Pressure Monitoring System Faults are specific to one location. If a BATTERY LOW ,SENSOR FAILURE fault is detected, the locationwill be displayed. The appropriate sensor/transmitter can then be replaced.



SYSTEM TEST

A test of the Tire Pressure Monitoring System can be initiated in the EVIC. The test sequence is as follows:

1. Scroll to the blank display by pressing the STEP button.

2. Press and hold the RESET button for five seconds.

3. The EVIC will request a beep to indicate the start of the test.

4. The EVIC will clear the sensor signal counters

5. The vehicle graphic will be displayed with transmission counters at each corner and for the spare. (Same display as for pressures but with counters in place of the tire pressures.)

6. Drive the vehicle at speeds above (25mph) for 10 minutes.

7. The counters will increase by one each time a sensor signal is received by the EVIC (approximately 1 signal per minute from each wheel except the spare).

The test will continue until any EVIC button is pressed or until the ignition is cycled to OFF.



A self-diagnostic test is used to determine that the EVIC module is operating properly, and that all PCI data bus messages are being received for initial operation. Initiate the self-diagnostic test as follows:

With the ignition switch in the Off position, simultaneously depress and hold the C/T button and the Reset button.
Turn the ignition switch to the On position.
Continue to hold both buttons depressed until the EVIC software version information is displayed, then release both buttons.
Following completion of these tests, the EVIC module will display one of the following messages:
PASS SELF TEST - Momentarily depress and release the Reset button to return to the compass/temperature/trip computer display mode. The EVIC module is working properly.
FAILED SELF TEST - The EVIC module has an internal failure. The EVIC module is faulty and must be replaced.
NOT RECEIVING J1850 MESSAGE - The EVIC module is not receiving proper message input through the PCI data bus. This can result from one or more faulty electronic modules in the vehicle, or from a faulty PCI data bus. The use of a DRB scan tool and the proper Diagnostic Procedures manual are required for further diagnosis.
NOTE: If the compass functions, but accuracy is suspect, it may be necessary to perform a variation adjustment. This procedure allows the compass unit to accommodate variations in the earth's magnetic field strength, based on geographic location. Refer to Compass Variation Adjustment in the Service Procedures section of this group.

NOTE: If the compass reading displays a blank, and only "CAL" appears in the display, demagnetizing may be necessary to remove excessive residual magnetic fields from the vehicle. Refer to Compass Demagnetizing in the Service Procedures section of this group.
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post #5 of 6 (permalink) Old 04-19-2015, 02:38 AM Thread Starter
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Nobody has experience with this?!
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post #6 of 6 (permalink) Old 04-24-2015, 01:27 AM Thread Starter
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Well crap! It looks like I am just stuck clearing the dumb message every single time I start the car :(
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