Part 1
AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0873: Transmission Fluid Pressure Sensor / Switch "C" Circuit High
P0873 - Transmission Fluid Pressure Sensor / Switch "C" Circuit High
DESCRIPTION
The oil pressure switch, which is built into the valve body, detects the fluid pressure of the SL1 fluid pressure circuit. If shift solenoid valve SL1 is stuck on, P0873 is output.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All
ON malfunction (A)
ON malfunction (B)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
ON malfunction (C)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
ON malfunction (D)
- When either condition below is met: Condition (1) or (2)
Condition (1)
- When one of the following conditions is met: Condition (a), (b), (c), (d), (e), (f), (g) or (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
Condition (2)
- When all conditions below are met: Condition (a), (b), (c), (d), (e), (f), (g) and (h)
Condition (a)
Condition (b)
Condition (c)
Condition (d)
Condition (e)
Condition (f)
Condition (g)
Condition (h)
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 DTC Check / Clear.
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.