1994 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Test Mode

  1. Before retrieving trouble code(s), verify MIL on instrument panel comes on with ignition on and engine off. The MIL should go off when engine is started.
  2. If MIL does not come on, see appropriate DIAGNOSTIC CIRCUIT CHECK  chart under TROUBLE CODE CHARTS.
  3. Ensure battery voltage is greater than 11 volts and charging system is okay. Apply parking brake. Shift the transmission/transaxle to Neutral (M/T) or Park (A/T). Turn A/C and all accessories off. Ensure throttle is in idle position and ignition is off.
    NOTE: Test Mode will not operate if jumper wire is installed between terminals TE2 and E1 in Data Link Connector (DLC) after ignition is turned on.
  4. Install Jumper Wire (SST 09843-18020) between terminals TE2 and E1 in Data Link Connector (DLC) with ignition off. See Fig 1.
  5. Turn ignition on with engine off. Test Mode is operational if MIL on instrument panel flashes.
  6. If MIL fails to flash, check TE2 wiring circuit. See appropriate DIAGNOSTIC CIRCUIT CHECK  chart under TROUBLE CODE CHARTS. See ECM LOCATION .
  7. On all models, drive vehicle at a speed greater than 6 MPH. ECM will set Trouble Codes 42 and 43 if vehicle is not driven. Try to simulate conditions of driveability complaint described by customer, and note when MIL comes on. This indicates when problem exists.
  8. Stop vehicle, but DO NOT  turn engine off. Install jumper wire between terminals TE1 and E1 in DLC. See Fig 1. Count number of flashes from MIL on instrument panel. If system is operating properly (with no trouble codes), MIL will flash continuously and evenly. See Fig 2.
  9. If trouble code exists, digits of trouble code will be flashed at approximately 1/2-second intervals. A 1 1/2-second pause separates first and second digits of code. See Fig 2.
  10. If more than one trouble code is stored, a 2 1/2-second pause will occur before next trouble code is flashed. Once all trouble codes are displayed, a 4 1/2-second pause will occur, then trouble code(s) will be repeated. Trouble codes are displayed in order of smallest to largest.
    NOTE: Trouble Code 51 will normally be displayed if automatic transmission/transaxle is in any gear except Park or Neutral, A/C is turned on, or accelerator pedal is depressed.
  11. After trouble code(s) is retrieved, remove jumper wires to exit Test Mode. See NOTES ON TROUBLE CODES . For additional information on trouble codes, see TROUBLE CODE DIAGNOSTIC HINTS  table under SELF-DIAGNOSTIC SYSTEM and appropriate TROUBLE CODE IDENTIFICATION  table under TROUBLE CODE IDENTIFICATION.
NOTE: The MIL may not come on if certain trouble code is set when in Test Mode. See appropriate TROUBLE CODE IDENTIFICATION  table under TROUBLE CODE IDENTIFICATION.
Factory Service Tools

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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.