DIAGNOSTIC RESPONSE:DNS, SOL OFF (hydraulic default) CIRCUIT DESCRIPTION:Pressure Control Solenoid 3 (PCS3) is a normally closed solenoid used to apply the C5 clutch in Reverse, Neutral, and First and to apply the C3 clutch in Third and Fifth ranges. The Transmission Control Module (TCM) commands the solenoid ON to produce hydraulic pressure in the clutch apply circuit. When PCS3 is commanded OFF, the clutch pressure is released. The TCM sends control current to PCS3 from High Side Driver 2 (HSD2) via wire 171. HSD2 is continuously ON unless the TCM detects a fault condition. The TCM regulates the amount of...

DIAGNOSTIC RESPONSE:DNS, SOL OFF (hydraulic default) CIRCUIT DESCRIPTION:Shift Solenoid 1 (SS1) is normally closed solenoid used to properly position C1 and C2 logic latch valves in forward ranges. The Transmission Control Module (TCM) commands the solenoid ON to supply control main pressure to the C1 and C2 logic latch valves. When SS1 is commanded OFF, control main pressure is released from the C1 and C2 latch valves. The TCM sends control current to SS1 from High Side Driver 2 (HSD2) via wire 171. HSD2 is continuously ON unless the TCM detects a fault condition. The TCM energizes SS1 by switching...

DIAGNOSTIC RESPONSE:DNS, SOL OFF (hydraulic default) CIRCUIT DESCRIPTION:Shift Solenoid 1 (SS1) is normally closed solenoid used to properly position C1 and C2 logic latch valves in forward ranges. The Transmission Control Module (TCM) commands the solenoid ON to supply control main pressure to the C1 and C2 logic latch valves. When SS1 is commanded OFF, control main pressure is released from the C1 and C2 latch valves. The TCM sends control current to SS1 from High Side Driver 2 (HSD2) via wire 171. HSD2 is continuously ON unless the TCM detects a fault condition. The TCM energizes SS1 by switching...

DIAGNOSTIC RESPONSE:7-speed: Allow 2 through 6, N, R CIRCUIT DESCRIPTION:The Shift Solenoid 2 (SS2) may either be assigned to retarder models with an air solenoid or to the SS2 required in 7-speed models. For retarder models with an accumulator, the Transmission Control Module (TCM) commands SS2 ON to enable the normally closed air solenoid which allows air pressure to stroke the accumulator piston to pre-fill the retarder cavity during retarder operation. For 7-speed models, the TCM commands the SS2 solenoid ON to send main pressure to both the C2 latch valve and the C6 interlock valve. The TCM sends control...

DIAGNOSTIC RESPONSE:7-speed: Allow 2 through 6, N, R. inhibit TCC operation. CIRCUIT DESCRIPTION:The Shift Solenoid 2 (SS2) may either be assigned to retarder models with an air solenoid or to the SS2 required in 7-speed models. For retarder models with an accumulator, the Transmission Control Module (TCM) commands SS2 ON to enable the normally closed air solenoid which allows air pressure to stroke the accumulator piston to pre-fill the retarder cavity during retarder operation. For 7-speed models, the TCM commands the SS2 solenoid ON to send main pressure to both the C2 latch valve and the C6 interlock valve. The...