P1702-PRIMARY OIL PRESSURE SENSOR / SECONDARY OIL PRESSURE SENSOR CORRELATION

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The Transmission Control Module (TCM) monitors the correlation between the primary and secondary pressure sensors. If the correlation between the sensors is out of range a DTC will set.

When Monitored:
Ignition on, system voltage between 9.0 and 16.0 volts.
Engine running with the transmission in Drive.
Vehicle speed greater than 10.0 Km/h (6.0 mph).
Accelerator Pedal Position (APP) greater than 12.5%.
Engine rpm greater than 450 rpm.
No active DTCs from the following:
Primary or Secondary Pressure Sensor
Transmission Temperature Sensor
TCC Lock Up Solenoid
Step Motor
Input or Output Speed Sensor
Transmission Range Sensor (TRS)
Line Pressure Solenoid
Secondary Pressure Solenoid
Set Condition:
Condition one:
Reported primary pressure is less than the lower limit of the primary pressure correlated with the reported secondary pressure for more than 5.0 seconds.
Condition two:
Reported primary pressure is greater than the upper limit of the primary pressure correlated with the reported secondary pressure for more than 5.0 seconds.

Possible Causes

PRIMARY PRESSURE SENSOR

SECONDARY PRESSURE SENSOR

TRANSMISSION CONTROL MODULE

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Diagnostic Test

1. CHECK FOR TRANSMISSION DTC(s)

With the scan tool, read Transmission DTCs.

Are any of the following DTC(s) present P0842, P0843, P0847, or P0848?

Yes

Refer to the Transmission Diagnostic and Testing category and perform the appropriate symptom(s).

Go To 2

2. CHECK TO SEE IF THE DTC IS ACTIVE

With the scan tool, read Transmission DTCs.

Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes

Go To 3

Go To 4

3. CHECK THE TCM

Replace or repair (valve body) the CV Transmission per the Service Information. Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Did the DTC reset during the verification test?

Yes

Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM per the Service Information.
Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Test Complete.

4. INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wires while checking for shorted and open circuits.

Were there any problems found?

Yes

Repair as necessary.

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Test Complete.