Service Procedure

1. Perform normal diagnostics found in the 1997 Powertrain Control/Emissions Diagnosis (PC/ED) On-Board Diagnostics II (OBD-II) Service Manual and service as required.





2. As in all electrical circuits, clean and properly tighten connections as required. The proper torque on the smaller nuts on the glow plug relay is 2.3-4.5 N.m (20-40 lb-in). The proper torque on the relay's high current nuts and the shunt nuts is 6.2-7.3 N.m (55-65 lb-in). When servicing the glow plug relay, make sure the appropriate nuts and washers are used. Refer to the PC/ED Service Manual to verify that all three (3) sensing wires are in the proper location (Figure 1). After making any repairs to the glow plug system where any codes are present, be sure to clear the codes and verify the repair with the Key On Engine Running (KOER) glow plug test.

3. If the concern still exists, reprogram the Powertrain Control Module (PCM) using the Service Bay Diagnostic System (SBDS) or New Generation Star (NGS) Tester. Refer to the following Recalibration Cross Reference Chart for the correct PCM calibration

NOTE
PCM REPLACEMENT IS NOT AUTHORIZED BY THIS TSB. REFER TO THE POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS (PC/ED) SERVICE MANUAL FOR APPROPRIATE DIAGNOSTIC PROCEDURES IF PCM HARDWARE CONCERNS EXIST.





Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.