1997 Toyota Avalon XLFACTORY OEM SERVICE PROCEDURE

EGR Position Sensor Testing

NOTE: EGR position sensor may also be referred to as EGR valve position sensor.
  1. Disconnect electrical connector from EGR position sensor. EGR position sensor is located on top of EGR valve. See Fig 1.
  2. Using ohmmeter, check resistance between terminals E2 and VC on EGR position sensor. See Fig 1. Resistance should be 1500-4300 ohms. If resistance is within specification, reinstall electrical connector on EGR position sensor and go to next step. If resistance is not within specification, replace EGR position sensor.
  3. To test EGR position sensor output voltage, disconnect vacuum hose from EGR valve. Remove glove box for access to Engine Control Module (ECM).
  4. Turn ignition on. Using voltmeter, check voltage between terminals No. 1 and 22 on ECM. Perform STEP 1. See Fig 2. See ECM TERMINAL APPLICATION  table. Voltage should be 4.5-5.5 volts. Remove voltmeter.
  5. Connect voltmeter between terminals No. 15 and 22 on ECM. Perform STEP 2. See Fig 2. See ECM TERMINAL APPLICATION  table.
  6. Using vacuum pump, apply 5.1 in. Hg of vacuum to EGR valve and note voltage. Voltage should be 3.2-5.1 volts with vacuum applied on EGR valve. Release vacuum from EGR valve and note voltage. Voltage should be .4-1.6 volts with vacuum released from EGR valve. Replace EGR position sensor if voltage is not within specification. Remove vacuum pump and reinstall vacuum hose on EGR valve.
ECM TERMINAL APPLICATION

Application & Terminal No. Wire Color
1 Blue/Red
15 Black/Orange
22 Brown
Fig 1: Locating EGR Position Sensor & Checking EGR Position Sensor Resistance
G97F06491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.