Engine Controls - Revised DTC P1650, Quad Driver
File In Section: 6E - Engine Fuel & EmissionBulletin No.: 71-65-57
Date: August, 1997
Subject:
Section 6E3A - Driveability and Emissions - Revised diagnostic for DTC P1650 Quad Driver Module (QDM) "B" Error 3.4L (VIN X) (SF1), 1994 W CAR
Models:
1994 Chevrolet Lumina, Lumina EURO, Lumina Z34
1994 Pontiac Grand Prix SE
1994 Oldsmobile Cutlass Supreme with 3.4L Engine (VIN X - RPO LQ1)
This bulletin is being issued to inform technicians of a revision to page 3 of 3 for DTC P1650 Quad Driver Module (QDM) "B" Error 3.4L (VIN X)(SFI).
The first diagnostic box on page 3 of 3 is in error. It reads as follows:
^ Use facing page wiring diagram for specific terminals to be tested.
^ Reconnect PCM, if applicable.
^ Key "ON", Engine "OFF", select field service mode with Tech 1.
^ Remove connector from solenoid in affected circuit.
^ Connect test light between terminals for ignition feed and PCM driver circuit.
^ Light should be "ON". Is it?
There is no field service mode capability on the scan tool for the 1994 W car with the 3.4L (VIN X) engine. Substitute the current steps in the first box with the following:
^ Use facing page wiring diagram for specific terminals to be tested.
^ Reconnect PCM, if applicable.
^ Key "ON", Engine "OFF", Under Misc. Tests, select transmission with Tech 1.
^ Disconnect transaxle connector.
^ Connect test light between transaxle harness connector terminals for ignition teed and affected solenoid driver circuit.
^ Turn affected solenoid "ON" with the Tech 1.
^ Light should be "ON". Is it?
In addition to inserting the new information for the first diagnostic box, remove all references to "Field Service Mode".