EXPERTEC TSB (51-65-64)

WARNING: This page is about the Jimmy 2D Utility, 4WD, Automatic, which is a different variant/trim than selected.

Publication date: 1995-10-05
Reference number: 51-65-64

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 51-65-64, Date of Issue: 10/05/95

SMU - SECTION 3B - - CONTROL MODULE SYSTEM

Model(s): 1995 Chevrolet & GMC Truck S/T Models With

Automatic And Manual Transmission And 4.3L Engine (VIN W - RPO L35)

Bulletin No.: Chevrolet 51-65-64, GMC 51-65-64

Date: 10/05/1995

SUBJECT

Service manual update-section 3B-control module system (VCM-A) - revised diagnostic aids.

SERVICE INFORMATION

This bulletin is being issued to reverse the diagnostic aids under P0117, P1114 and P0118, P1115. This is in the 1995-S/T DRIVEABILITY, EMISSIONS AND ELECTRICAL DIAGNOSIS MANUAL # GMT/95-ST.

Pages 3B-59, 3B-61 and 3B-143, 3B-145 Should read as follows:

P0117, P1114

Check harness routing for a potential short to ground in the 5 volt reference circuit.

The scan tool displays engine temperature in degrees centigrade. After engine is started, the temperature should rise steadily to about 90 degrees C, then stabilize when thermostat opens.

The "Temperature Vs. Resistance Value" scale may be used to test the coolant sensor at various temperature levels to evaluate the possibility of a "Skewed" (mis-scaled) sensor. A "Skewed" sensor could result in poor driveability concerns.

P0118, P1115

A faulty connection or an open in the 5 volt reference circuit or the sensor ground circuit will result in a DTC P0117.

The scan tool displays engine temperature in degrees centigrade. After engine is started, the temperature should rise steadily to about 90 degrees C, then stabilized when thermostat opens.