D21 Hardbody XE 4WD L4-2389cc 2.4L SOHC MFI (KA24E) (1997)
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APPLIED VEHICLE:
All 1996-97 Truck (D21)
SERVICE INFORMATION
Use this bulletin if a 1996-97 Truck will not maintain idle or idles roughly after an engine cold soak and/or the MIL is "on" with DTC P0400 stored in
the ECM.
A countermeasure EGR valve is available to resolve such incidents if the cause is a sticking EGR valve.
SERVICE PROCEDURE
With the engine cold, perform an inspection of the EGR valve as follows:
1.
Apply vacuum to the EGR valve with a hand vacuum pump, then release the vacuum (see Figure 1).
2.
Check to see that the EGR valve opens when the vacuum is applied and closes when the vacuum is released.
A.
If the EGR valve sticks open or does not open and close smoothly, replace the EGR valve with the countermeasure EGR valve and gasket.
B.
If the EGR valve opens and closes smoothly, refer to Trouble Diagnosis in the EC section of the appropriate service manual to diagnose this
incident.
PARTS INFORMATION
CLAIMS INFORMATION
When applicable, standard claims coding applies.
Technical Service Bulletin # 96-032
Date: 960417
Engine Controls - Idle, Base Idle & Timing, Startability
Classification:
EC96-004
Reference:
NTB96-032
Date:
