Part 2
AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0873: Transmission Fluid Pressure Sensor / Switch "C" Circuit High
P0873 - Transmission Fluid Pressure Sensor / Switch "C" Circuit High
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 AA80E Automatic Transmission.
INSPECTION PROCEDURE
NOTICE:
Perform the universal trip to clear permanent DTCs AA80E Automatic Transmission System.
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. CHECK OIL PRESSURE SWITCH CIRCUIT
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
HINT
Do not disconnect the connectors of the TCM.
NG -- READ VALUE USING DATA LIST (TPS 1 SW SIGNAL)
OK -- Continue to next step.
3. INSPECT SHIFT SOLENOID VALVE SL1
(a) Remove shift solenoid valve SL1 Disassembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Connect the battery's positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating noise.
OK:
Valve moves and makes operating noise.
NG -- REPLACE SHIFT SOLENOID VALVE SL1 Disassembly
OK -- Continue to next step.
4. INSPECT TRANSMISSION VALVE BODY ASSEMBLY
(a) Check the transmission valve body assembly Disassembly.
OK:
There are no foreign objects on any valve.
NG -- REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY Removal
OK -- Continue to next step.
5. INSPECT TORQUE CONVERTER ASSEMBLY
(a) Check the torque converter assembly AA80E Automatic Transmission.
OK:
The torque converter assembly operates normally.
NG -- REPLACE TORQUE CONVERTER ASSEMBLY Removal
OK -- REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY Removal
6. READ VALUE USING DATA LIST (TPS 1 SW SIGNAL)
(a) Connect terminals TPS1 and E1 of the E5 and E6 TCM connectors.
HINT
Before connecting the terminals, do 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.
Result:
B -- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
A -- Continue to next step.
7. REPLACE TCM
(a) Replace the TCM Removal.
NEXT -- PERFORM A/T CODE REGISTRATION Registration
8. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
(a) Disconnect the E50 transmission wire connector.
(b) Disconnect the E6 TCM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. INSPECT TRANSMISSION WIRE (OIL PRESSURE SWITCH)
(a) Disconnect the oil pressure switch connector.
(b) Disconnect the E50 transmission wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE TRANSMISSION WIRE Removal
OK -- REPLACE OIL PRESSURE SWITCH Disassembly