The clutch pressure control (PC) solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R clutch. The transmission fluid pressure (TFP) switch 1 opens (high) under fluid pressure and closes (low) when no pressure is present. The transmission control module (TCM) calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

TFP Switch 1 = Low (No fluid pressure)

DTC P0736 is a Type A DTC.

DTC P0736 is a Type A DTC.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks. If there are any other transmission DTCs set, diagnose those first.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

DTC Type Reference

Electrical Information Reference

1. Operate the vehicle to induce a shift from second to third gear while observing TFP Switch 1. Perform this action 2 times. The TFP Switch 1 should change states from Low to High.

⇒	If the TFP Switch does not change states and no other DTCs set, replace the control solenoid (w/body and TCM) valve assembly.

⇒	If any other DTCs set, diagnose that DTC first.

2. Operate the vehicle to obtain sixth gear 2 times and then check for DTCs other than DTC P0736.

⇒	If any other DTCs set, diagnose that DTC first.

⇒	If no other DTC sets, continue on with diagnostics.

3. Operate the vehicle by shifting from Park to Reverse, then while in reverse, operate the vehicle with the calculated throttle position greater than 8 percent for 5 seconds, perform this maneuver a minimum of 3 times.

⇒	If the DTC P0736 resets, go to Component Testing.

1. Perform the Line Pressure Check .
2. Inspect the check ball 5 for possible sticking or damage.

⇒	If you found a concern with this check ball, repair the concern.

3. Inspect the shift select valve 3 for sticking or damage.

⇒	If you found a concern with the shift select valve 3, repair or replace the valve or valve body.

4. Inspect the low and reverse clutch assembly for wear or damage.

⇒	If you found a low and reverse clutch assembly concern, repair or replace the low and reverse clutch assembly as necessary.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.