Part 2

AA80E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: P0873: Transmission Fluid Pressure Sensor / Switch "C" Circuit High
P0873 - Transmission Fluid Pressure Sensor / Switch "C" Circuit High (Continued)

TYPICAL MALFUNCTION THRESHOLDS

- When both conditions below are met: ON malfunction (A) and ON malfunction (B), (C) or (D)

2 detections are necessary per driving cycle:

1st detection: temporary flag ON

2nd detection: pending fault code ON

ON malfunction (A)

*





ON malfunction (B)

- When either condition below is met: Condition (1) or (2)

Condition (1)





Condition (2)





ON malfunction (C)

- When either condition below is met: Condition (1) or (2)

Condition (1)





Condition (2)





ON malfunction (D)

- When either condition below is met: Condition (1) or (2)

Condition (1)





Condition (2)





WIRING DIAGRAM

Refer to DTC P0872 P0872.

INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0746 AND P0873)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / ECT / Trouble Codes.

(e) Read the DTCs using the Techstream.

Result:





HINT
If any other codes besides P0746 and P0873 are output, perform troubleshooting for those DTCs first.

B -- GO TO DTC CHART Automatic Transmission System - AA80E
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (TPS 1 SW SIGNAL)

(a) Connect terminals TPS1 and E1 of the TCM connectors.





HINT
Before checking, perform visual and contact pressure checks on the TCM connectors.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / ECT / Data List.

(f) Read the value displayed on the Techstream.

Standard:





NG -- CHECK OIL PRESSURE SWITCH CIRCUIT
OK -- Continue to next step.

3. REPLACE TCM

(a) Replace the TCM Removal.

NEXT -- PERFORM A/T CODE REGISTRATION Registration

4. CHECK OIL PRESSURE SWITCH CIRCUIT

(a) Turn the engine switch off.





HINT
Before checking, perform visual and contact pressure checks on the TCM connectors.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result:





B -- INSPECT SHIFT SOLENOID VALVE SL1
A -- Continue to next step.