2003 Nissan Altima L31 Series Automatic Transaxle Service Manual

2003 Nissan Altima L31 series technical guide detailing automatic transaxle removal and installation. Covers control system, diagnostics, and torque specifications. PN: 31940

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Nissan Models Covered & Key Technical Specifications

Models: Nissan Altima L31 Series
Sub-models / Variants: QR25DE, VQ35DE
Build Years: 2003
Technical Data:

  • Accelerator pedal total travel: 52.6–58.2 mm (2.07–2.29 in)
  • Stall revolution (QR25DE): 2,350–2,800 rpm
  • Stall revolution (VQ35DE): 2,550–3,050 rpm
  • ATF operating temperature range: 50–80°C (122–176°F)
  • Throttle position sensor voltage (fully closed): 0.5 V
  • Throttle position sensor voltage (fully open): 4 V
Technical Specifications
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Document Number / Seller:
30868 / Amanda Thomas
File Size:
46.24 MB
File Type:
ZIP
Language:
English
Pages:
2001+
Printable:
Yes
Category:
Car
Last updated / verified
May 15, 2025

Nissan Manual Features & Content Preview

2003 Nissan Altima L31 Series Automatic Transaxle Manual

  • Covers 2003 Nissan Altima L31 Series equipped with automatic transaxles, including engine variants QR25DE and VQ35DE
  • Official Nissan publication, revision date May 2004
  • Contains 80+ pages of detailed system schematics, diagnostic trouble code definitions, and hydraulic control circuit diagrams
  • File delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Detailed cross-sectional views for the automatic transaxle components help with identification
  • This specific edition provides the factory-authorized diagnostic sequences for the L31 series automatic transaxle, including CONSULT-II diagnostic procedures for DTCs

Diagnostic and System Documentation

This factory service publication provides technical data for the maintenance and diagnostic evaluation of the 2003 Nissan Altima automatic transaxle system. Chapters detail the internal architecture of the unit, including the hydraulic control circuit, clutch and brake engagement patterns, and the role of the Transmission Control Module (TCM) in shift point and line pressure management. The manual outlines the functional logic for solenoids such as the shift solenoid valves, overrun clutch solenoid, and the torque converter clutch solenoid valve.

Technical Reference and Specification Highlights

Sections include diagnostic procedures for common transmission issues, ranging from shift quality concerns to lock-up malfunctions. The document documents diagnostic trouble codes (DTCs) ranging from P0705 to U1000, providing confirmed test paths using either CONSULT-II or standard diagnostic equipment. Factory-specified values for stall revolutions are 2,350–2,800 rpm for QR25DE models and 2,550–3,050 rpm for VQ35DE models, documented in the stall test inspection section. Throttle position sensor voltage output is specified as 0.5 V for closed-throttle conditions and 4 V for fully-open conditions. The 2003 Nissan Altima L31 series automatic transaxle service manual provides technicians with the technical specifications required to perform accurate system diagnostics and repairs for the 2003 model year.

Manual FAQ, Purchase & Download Details

Can I find total pedal travel specification tables in this document? keyboard_arrow_down

Yes, the manual includes a Service Data and Specifications section that lists the total pedal travel distance for the accelerator control system.

Which chapters reference the control system wiring diagrams and electrical connector pinout locations? keyboard_arrow_down

Transmission and Transaxle section lists these wiring diagrams and connector locations in the overall system and trouble diagnosis chapters. These references provide the layout of electrical parts and their interaction within the automatic transaxle.

What information regarding the engine, transmission, and sensor specifications does this service manual cover? keyboard_arrow_down

Document contains extensive specification tables for transmission components, including shift schedules, stall revolutions, and line pressure values. It also details the control system functions, such as the Transmission Control Module logic and the operation of various solenoid valves. Additionally, the manual lists diagnostic trouble codes and their corresponding electrical reference sections for the automatic transaxle system.

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