Toyota OBD/OBD2 Codes >> Toyota 88-94 Land Cruiser 4.0L

Accessing – MIL

  • Switch ignition ON
  • Check MIL illuminates
  • Start engine.  Allow to idle.
  • If MIL extinguishes, no trouble codes have been recorded.
  • If MIL remains illuminated, access trouble codes.

Accessing – Trouble Codes

  • Switch ignition ON. Do NOT start engine
  • 1988-90 – jump DLC terminals T and E1 with a short lead 1
  • 1991-94 – jump DLC terminals T and E1 with a short lead 2
  • Count MIL flashes and compare with trouble code table
  • First flashes of 0.5 second duration indicate ‘tens’, after a 1.5 second pause, next flashes of 0.5 second duration indicate ‘units’
  • A 2.5 second pause occurs between codes
  • After a 4.5 second pause, trouble codes will be repeated
  • The MIL flashes once every 0.25 seconds if the system is correct
  • Switch ignition OFF
  • Remove jump lead

Clearing Trouble Codes

  • After the faults have been rectified, erase the trouble codes as follows:
  • 1988-90 – remove EFI fuse (15A) from LH fascia panel fusebox for 30 seconds minimum 5
  • 1991-94 – remove EFI fuse (15A) from underhood fusebox for 30 seconds minimum 6
  • Reinstall fuse
  • Repeat accessing procedure to ensure no data remains in ECM fault memory

 Trouble Codes

88 – 94 Land Cruiser 4.0L Engine Code: 3F-E
Trouble code Fault location Probable Cause
11 Engine control module (ECM) power supply Wiring, ignition switch, engine control relay, ECM
12 Engine speed (RPM) sensor -circuit Wiring, RPM sensor, ECM
13 Engine speed (RPM) sensor -above 1000 rpm Wiring, RPM sensor, ECM
14 Ignition reference signal -no signal Wiring, ignition module/coil, ECM
21 Heated oxygen sensor (H02S) 1 circuit Wiring, H02S, ECM
22 Engine coolant temperature (ECT) sensor circuit Wiring, ECT sensor, ECM
24 lntake air temperature (IAT) sensor circuit Wiring, IAT sensor, ECM
25 Mixture control -continuously lean Wiring, injector, H02S, ECT/VAF sensor, intake/fuel/ignition system, ECM
26 Mixture control -continuously rich Wiring, injector, fuel system, cold start injector, H02S, ECT/VAF sensor, ECM
28 Heated oxygen sensor (H02S) 2 circuit Wiring, H02S, ECM
31 Volume air flow (VAF) sensor -circuit Wiring, VAF sensor, ECM
32 Volume air flow (VAF) sensor -circuit Wiring, VAF sensor, ECM
35 Barometric pressure (BARO) sensor-circuit ECM
41 Throttle position (TP) sensor -circuit Wiring, TP sensor, ECM
42 Vehicle speed sensor (VSS) -circuit Wiring, VSS, ECM
43 Starter signal -circuit Wiring, ignition switch, ECM
51 Switch signal -A/C switch ON during diagnosis Wiring, A/C switch, A/C amplifier, ECM
51 Switch signal -closed throttle position (CTP) switch OFF during diagnosis Wiring, CTP switch, ECM
51 Switch signal -park/neutral position (PNP) switch not in P or N during diagnosis Wiring, PNP switch, ECM
52 Knock sensor (KS) 1 -circuit Wiring, KS, ECM
53 Knock control -malfunction ECM
55 Knock sensor (KS) 2 -circuit Wiring, KS, ECM
71 Exhaust gas recirculation (EGR) system -malfunction Hose leak/blockage, wiring, EGRT sensor, EGR solenoid, ECM
81 Transmission control module (TCM) -communication Wiring
83 Transmission control module (TCM) -communication Wiring
84 Transmission control module (TCM) -communication Wiring
85 Transmission control module (TCM) -communication Wiring

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.