2000 Nissan Pathfinder Automatic Transmission (AT) Service Manual (P/N SM0E-1R50U2)

• Exact application: 350-page PDF covering Nissan Section AT for the 2000 Pathfinder R50 with the VG33E engine and RE4R01A automatic transmission. The factory specifications identify transmission code 4EX08 for 2WD and 43X73 for 4WD; the section belongs to Nissan Publication No. SM0E-1R50U2, Edition August 1999, Revision July 2000.
• Electronic diagnosis: Covers the 15 listed OBD-II transmission DTCs, TCM self-diagnosis, one- and two-trip detection logic, fail-safe operation, and testing with CONSULT, a Generic Scan Tool (GST), or the manual no-tools method using the MIL and O/D OFF indicator.
• Hydraulic and road-test procedures: Provides A/T fluid inspection, stall testing, line-pressure testing, road testing, shift and lock-up evaluation, TCM terminal reference values, and 21 symptom-based diagnostic routines for complaints that may not set a DTC.
• On-vehicle service and unit removal: Details control valve and accumulator service, revolution sensor replacement, rear oil-seal work, parking-component inspection, PNP switch and manual-linkage adjustment, shift-lock diagnosis, key-interlock cable service, and separate 2WD/4WD transmission removal and installation coverage.
• Internal repair coverage: Documents transmission disassembly, inspection, adjustment, and reassembly for the oil pump, upper and lower valve bodies, reverse and high clutches, forward and overrun clutches, low and reverse brake, forward clutch drum, internal gear and clutch hub, band servo, and parking pawl.
• Factory workshop references: Includes electrical and hydraulic diagrams, DTC-specific circuit sheets, exploded component views, special-service-tool numbers, torque tables, fluid specifications, pressure-test data, clutch and brake wear limits, selective-part data, end-play specifications, and electrical test values.

Electronic Diagnosis and Fault Isolation

The electronic-control chapters explain how the TCM uses the PNP switch, throttle inputs, engine-speed signal, A/T fluid-temperature sensor, revolution sensor, vehicle-speed signal, overdrive switch, and related inputs to manage shift timing, line pressure, torque-converter lock-up, and engine braking. Each major DTC section combines fault-detection logic with a circuit diagram, confirmation procedure, diagnostic checks, and component inspection. Coverage runs from P0705, P0710, P0720, and P0725 through gear-ratio faults P0731-P0734, torque-converter codes P0740/P0744, line-pressure and shift-solenoid faults, throttle-position input, and the overrun-clutch solenoid.

The symptom chapters go beyond stored codes. They trace no-start conditions in Park or Neutral, unintended movement in Park or Neutral, harsh Neutral-to-Reverse engagement, loss of creep, missing upshifts or kickdown, lock-up apply and release faults, downshift complaints, loss of engine braking, and a self-diagnosis routine that will not activate. The manual also provides the A/T SHIFT wiring diagram and key-interlock cable checks rather than treating selector problems as transmission-internal failures.

Mechanical Service, Overhaul, and Adjustment

On-vehicle repair coverage reaches the control valve assembly and accumulators, sensors, seals, parking hardware, and linkage adjustments. Separate removal procedures account for the transfer case and driveline work on 4WD models versus the rear-mount and companion-flange handling required on 2WD models. The overhaul chapters then carry the RE4R01A through teardown, component inspection, clutch and brake repair, valve-body service, end-play adjustment, and final assembly.

Factory tool references include the ST2505S001/J34301-C line-pressure gauge set, ST07870000/J37068 transmission case stand, KV31102100/J37065 torque-converter one-way-clutch checker, KV31102400/J34285 clutch spring compressor, and J34291 shim-setting gauge. The service notices also distinguish conditions that justify torque-converter replacement from mileage or discolored fluid alone, and they address cooler contamination when debris is found in the pan or strainer.

Two cautions are especially useful during repair planning. Nissan warns that battery voltage remains at the TCM with the ignition off, so connector work without battery isolation can damage the control unit. During transmission removal, the crankshaft position sensor on the upper case must be protected because its edge is vulnerable to damage.

Diagrams, Specifications, and Scope

Representative illustrations include A/T Electrical Parts Location, Cross-sectional View, Hydraulic Control Circuit, Wiring Diagram - AT - MAIN, Wiring Diagram - AT - TCCSIG, and the SHIFT interlock diagram. The Service Data and Specifications section covers separate 2WD/4WD model data and fluid capacities, shift schedules, stall and line-pressure references, return springs, accumulator O-rings, clutch and brake plate specifications, oil-pump clearances, total and reverse-clutch-drum end play, and solenoid and sensor electrical checks. The approved-fluid information identifies Nissan Matic “D” for the continental United States and Alaska, with Genuine Nissan Automatic Transmission Fluid specified for Canada. The fluid-service notes also explain that removing the drain plug leaves old ATF in the torque converter and cooler circuit.

This PDF is the Automatic Transmission section, not the complete vehicle service manual. Nissan cross-references other sections for general wiring methods, engine and starter work, transfer-case and propeller-shaft removal, SRS precautions, and the full fluid-change procedure. Transmission removal, stall and pressure testing, and road-test confirmation should be carried out with the vehicle secured as directed and the factory precautions followed.