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TEST ACTION APPLICABILITY 2 With the DRBIII t, check for other Transmission DTC’s. Is DTC P-1791 present in addition to the DTC that you are diagnosing? 45RFE AUTO TRANS Yes → Refer to symptom list and perform test for P1791. No → 3 With the DRBIII t, check for other Transmission DTC’s. Are there any Transmission Control Relay related DTC’s P1765, P1767, or P1768 45RFE AUTO TRANS Yes → Refer to symptom list and perform test for Transmission Relay No → 4 With the DRBIII t, Check the STARTS SINCE SET counter. NOTE: This counter only applies to the last DTC set. 45RFE AUTO TRANS Yes → No → 5 Turn the ignition off to the lock position. t screen while pressing the pressure switch test button. Did the pressure switch state change from open to closed when the switch was 45RFE AUTO TRANS Yes → No → 6 If there are no possible causes remaining, view repair. 45RFE AUTO TRANS Repair Replace the Solenoid/TRS assembly in accordance with the Ser- 183 TRANSMISSION P1784-LR PRESSURE SWITCH SENSE CIRCUIT — Continued |