P0842

K41B CVT: CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P0842, P0843: Transmission Fluid Pressure Sensor/Switch "A" Circuit Low

DESCRIPTION

The ECM performs learning control for the belt clamping pressure, based on the belt clamping pressure signal, which is detected by the oil pressure sensor.





MONITOR DESCRIPTION

These DTCs indicate an open or short in the oil pressure sensor. When there is an open or short circuit in oil pressure sensor circuits, the ECM detects the problem, illuminates the MIL and stores the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





TYPICAL MALFUNCTION THRESHOLDS

P0842:





P0843:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. READ VALUE USING TECHSTREAM (A/T OIL PRESSURE) P0841

B -- REPLACE ECM
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)

(a) Disconnect the oil pressure sensor connector.

(b) Disconnect the ECM 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.

3. INSPECT ECM (VCPT TERMINAL VOLTAGE)

(a) Connect the ECM connector.





(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPLACE ECM
OK -- Continue to next step.

4. REPLACE OIL PRESSURE SENSOR P0841

NEXT -- Continue to next step.

5. PERFORM INITIALIZATION P0705

NEXT -- END

6. REPLACE ECM P0705

NEXT -- Continue to next step.

7. PERFORM INITIALIZATION P0705

NEXT -- END