FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Transmission Diagnosis

Diagnostic Chart:




Schematic:




Shift Solenoid State Table:




The 2-3 shift solenoid valve (2-3 SS Valve) controls fluid flow acting on the 2-3 shift valve. The solenoid is a normally open valve that along with the 1-2 shift solenoid valve (1-2 SS Valve), allows four different shifting combinations. The 2-3 SS Valve is attached to the valve body inside the transaxle. The Transmission Control Module (TCM) switches ignition voltage to power the solenoid and commands the solenoid ON and OFF by providing a ground path through circuit 1223. When the TCM detects a continuous open or short to ground in the 2-3 SS Valve, DTC P1845 sets. DTC 1845 is a type A DTC.

DTC PARAMETERS
^ DTC P1845 will set if there is a continuous open or short to ground in the 2-3 shift solenoid valve circuit.
^ Engine speed is greater than 500 rpm for 5 seconds.
^ System voltage is between 8 and 18 volts.
^ No A/T Solenoid Power Circuit Low code.

DIAGNOSTIC AIDS
Inspect the wiring at the TCM, the transaxle connector, the 2-3 SS Valve 2-way connector, and all other circuit connecting points for the following conditions:
- A bent terminal
- A backed out terminal
- A damaged terminal
- Poor terminal tension
- A chafed wire
- A broken wire inside the insulation
- Moisture intrusion
- Corrosion

When diagnosing for an intermittent short or open condition, massage the wiring harness while watching the test equipment for a change.