• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Shift Solenoid (SS) 1 Control | P0973 | P0974 | P0974 | -- |
Shift Solenoid (SS) 1 High Side Driver 2 | P1833 | P1833 | P1834 | -- |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
---|---|---|---|
Operating Conditions: Engine running, normal operating temperature Parameter Normal Range: OK | |||
Shift Sol. 1 CKT Status | Short to GND | Open | Short to Voltage |
High Side Driver 2 CKT Status | Open/Short to GND | Open/Short to GND | Short to Voltage |
The shift solenoid (SS) 1 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The control solenoid (w/body and TCM) valve assembly supplies 12 volts to SS 1 on the high side driver 2 circuit. The control solenoid (w/body and TCM) valve assembly controls the normally closed SS 1 on the SS 1 control circuit. The SS 1 controls the transmission fluid to the Mode-2 valve. In the OFF position no oil is supplied to the clutch pressure control (PC) solenoid 3 or the transmission fluid pressure (TFP) switch 5, and the 4-5-6 clutch is fed by drive fluid. In the ON position, Reverse fluid is allowed to flow and is supplied to the 3-5-R clutch.
• | DTC P0973 is not set. |
• | Start the ignition voltage, run the engine. |
• | DTC P0974 is not set. |
• | Start the ignition voltage, run the engine. |
• | The control solenoid (w/ body and TCM) assembly detects a internal low voltage electrical malfunction of the SS 1 control circuit. |
• | Last for 1.2 seconds in the 1.5 seconds sample time. |
• | The control solenoid (w/ body and TCM) assembly detects a internal high voltage electrical malfunction of the SS 1 control circuit. |
• | Last for 1.2 seconds in the 1.5 seconds sample time. |
• | DTC P0973 and P0974 are Type B DTCs. |
• | The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear. |
• | The TCM inhibits the Torque Converter Clutch (TCC). |
• | The TCM commands maximum line pressure. |
• | The TCM freezes transmission adaptive functions. |
• | DTC P0973 is a type A DTC. |
• | DTC P0974 is a type B DTC. |
When attempting to set solenoid electrical DTCs, ensure the control solenoid (w/body and TCM) valve assembly is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
Automatic Transmission Controls Schematics
⇒ | If the parameter displays Open, Short to Volts, Short to GND, or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. |
⇒ | If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.