1994 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code System Affected (1) Normal Mode (1) Test Mode Probable Cause
12  RPM Signal ON N/A Distributor, Starter Or Circuit, ECM
13  RPM Signal ON ON Distributor Or Circuit, ECM
14  Ignition Signal ON N/A Ignitor Or Circuit To ECM, ECM
21  (2) No 1 Oxygen Sensor Signal ON ON No. 1 Oxygen Sensor/ Heater Or Circuit, ECM
22  Engine Coolant Temperature Signal ON ON Engine Coolant Temp Sensor Or Circuit, ECM
24  Intake Air Temperature Sensor Signal ON ON Intake Air Temp Sensor Or Circuit, ECM
25  Lean Air/Fuel Mixture ON ON Loose Ground, Injector Or Circuit, Oxygen Sensor/Heater Or Circuit, Fuel Pressure, Ignition, Airflow Meter PAIR System. ECM
26  Rich Air/Fuel Mixture ON ON Loose Ground, Injector Or Circuit, Fuel Pressure, Engine Coolant Temp Sensor, Airflow Meter Compression, ECM
28  (3) No 2 Oxygen Sensor Signal ON ON No 2 Oxygen Sensor/ Heater Or Circuit, ECM
31  Airflow Meter Signal Circuit ON ON Airflow Meter Or Circuit, ECM
32  Airflow Meter Signal Circuit ON ON Airflow Meter Or Circuit, ECM
35  BARO Sensor ON ON ECM
41  TP Sensor Signal ON ON Throttle Position Sensor Or Circuit, ECM
42  Vehicle Speed Sensor Signal OFF OFF Vehicle Speed Sensor Or Circuit, ECM
43  Starter Signal N/A OFF Starter Signal Circuit, Ignition Switch Or Circuit, ECM
51  Switch Condition Signal N/A OFF A/C Switch Circuit, Park/Neutral Switch Or Circuit, TPS Or Circuit, ECM
52  (4) Front Knock Sensor Signal ON N/A Front Knock Sensor Or Circuit, ECM
53  Knock Control Signal ON N/A ECM
55  (5) Rear Knock Sensor Signal ON N/A Rear Knock Sensor Or Circuit, ECM
71  EGR System Malfunction ON ON EGR System, EGR Temp Sensor Or Circuit, EGR-VSV, ECM
81  Transmission Control Module Communication ON N/A ECT1 Circuit
83  Transmission Control Module Communication ON N/A ESA1 Circuit
84  Transmission Control Module Communication ON N/A ESA2 Circuit
85  Transmission Control Module Communication ON N/A ESA3 Circuit
(1) ON indicates MIL on instrument panel will be illuminated. N/A indicates item is not included in malfunction diagnosis when using this mode. OFF indicates MIL on instrument panel will not be illuminated even if malfunction is detected.
(2) The No. 1 oxygen sensor is located on exhaust pipe closest to outside of vehicle on passenger's side.
(3) The No. 2 oxygen sensor is located on exhaust pipe closest to outside of vehicle on driver's side.
(4) Front knock sensor may be referred to as No. 1 knock sensor.
(5) Rear knock sensor may be referred to as No. 2 knock sensor.
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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.

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