Shift Solenoid "B" Circuit Check: Notes
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1992 GMC Yukon, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
The shift solenoids are used inside the valve body to control the spool valves, which determine the transmission gear. Fused ignition is supplied to solenoid "B". The PCM/TCM will engage solenoid "B" by grounding circuit No. 1223 to energize the solenoid.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- This test checks shift solenoid "B" and the internal transmission wiring for shorts.
- This test checks for power, from the ignition through the transmission fuse, to the shift solenoid "B".
- This test checks PCM/TCM's ability to ground or control the shift solenoid "B".
- This test ensures circuit No. 1223 is not shorted to ground.
- This test checks PCM/TCM's ability to ground or control the shift solenoid "B". If bidirectional scan tester is not available, TCC may be activated by grounding ALDL test terminal "B" with ignition on and engine off.
- This test ensures circuit No. 1223 is not shorted to ground.