EGR Boost Sensor/PCM - MIL ON/DTC's P0400 or P1195 Set

Bulletin No.: 025/97
Issued: 11/18/97
Revised:

Category:
F

Applicable Model/s:
1996-97 626/MX-6 With 4 Cyl. Engine

Subject:
MIL ILLUMINATION AND DTC P0400 or P1195 STORED MEMORY

AFFECTED MODELS
1996-97 626/MX-6 with 4 cylinder (I-4) engines.

DESCRIPTION
The Malfunction Indicator Light (MIL) may illuminate and DTC P0400 or P1195 may be stored in memory. This concern may be caused by any one of the following conditions:

^ Mis-routed, twisted or kinked vacuum lines.

^ Swapped Pressure Regulator Control (PRC) and EGR Boost Sensor solenoid connectors.

^ Defective EGR Boost Sensor.

^ PCM MIL misjudgment (1996 model with MTX) Customers complaining of this concern should have the vehicle inspected according to this bulletin and if necessary, repair.

REPAIR PROCEDURE

1. Verify that all vacuum lines are properly routed, not kinked or twisted.





2. Locate the PRC and EGR boost sensor solenoid valves on the right side of the intake manifold. Refer to F1-3 (MTX) or F3-3 (ATX) of the 1996 workshop manual for solenoid location.

3. Verify correct connector placement at the PRC and EGR Boost Sensor solenoid.
^ If the connectors are not in the proper position, correct their placement and proceed to step 9.
^ If the connectors are in the proper position, proceed to step 4.

NOTE:
^ The color of each connector varies with each powertrain
^ The PRC connector is the top connector and is BLACK or WHITE.
^ The EGR boost sensor solenoid connector is the bottom connector and is ORANGE.

4. Inspect the EGR boost sensor.
^ warm engine to normal operating temperature.





^ Measure the voltage between the signal wires (refer to table shown) from the rear side of the connector.
^ Allow engine to idle.
^ Use a vacuum pump and apply vacuum to the EGR boost sensor according to the table shown.





NOTE:
When measuring 0"HG, disconnect the vacuum line from the boost sensor. Vacuum to voltage readings are approximations.

5. Record the voltage.
^ If the voltage readings are not within the specified range, replace boost sensor and proceed to step 9.
^ If the voltage is within the range specified in the table, proceed to steps 6 - 8 for 1996 4cyl. MTX, all other configurations refer to the workshop manual for further troubleshooting and repair instructions.





6. Verify the vehicle has the following PCM (19964 cyl MTX only).
^ Replace PCM if not as specified.





7. Locate PCM terminal 3H (L/B) wire and Cut the wire 3 inches from the PCM. Refer to Fig. 2

8. Install a boost sensor signal filter and secure the filter to the harness.

9. Verify the repair by completing the EGR system monitor.

IMPORTANT NOTE:
If performing an EGR simulation test, note that a DTC with format P14** may be set. This is a normal condition caused by performing this test. Any DTC with format P014** which is set during this test should be ignored and deleted.





PARTS INFORMATION





WARRANTY INFORMATION
(Applies To Verify Customer Complaints On Vehicles Covered Under Normal Warranty. Refer To The SRT Microfiche For Warranty Term Information.)





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