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P0870-OD HYDRAULIC PRESSURE TEST (CONTINUED) Diagnostic Test 1. DETERMINING IF RELATED DTC’S ARE PRESENT With the scan tool, check for other transmission DTC’s Is there any Loss of Prime, Transmission Control Relay, and/or Line Pressure Sensor DTCs present? Yes >> Refer to the Transmission category and perform the appropriate symptom. If the DTC, P0944-LOSS OF PRIME is present, perform its respective test first. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. No >> Go To 2 2. DTC P0760 PRESENT With the scan tool, check Transmission DTCs. Is the DTC P0760 also present? Yes >> Refer to the symptom list and perform diagnostics for P0760–OD SOLENOID CIRCUIT. No >> Go To 3 3. OTHER DTCS PRESENT With the scan tool, check for other transmission DTC’s Are any of the DTCs, P0733, P0734 ,P0735 and/or P0871 present also? Yes >> Go To 12 No >> Go To 4 4. CHECK TO SEE IF DTC P0870 IS CURRENT With the scan tool, check the STARTS SINCE SET counter for P0870. Is the STARTS SINCE SET COUNTER 2 or less? Yes >> Go To 5 No >> Go To 17 5. LINE PRESSURE STAYS THE SAME Start the engine. Warm the transmission to 82° C or 180° F. Firmly apply the brakes. With the scan tool, monitor the Line Pressure during the following step. Move the shift lever to each gear position, pausing momentarily in each position and record the line pressure read- Did the line pressure remain at a steady value between 585 and 655 kPa or 85 and 95 PSI in each posi- Yes >> Go To 6 No >> Go To 10 HB AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS 21 - 485 |