Mitsubishi 3000GT 3.0L/Turbo – Diamante 3.0L – Galant 2.4L – Mirage 1.8L (1994 – 1995) OBD1 Codes

ModeL	Year	Engine identification	System
3000GT 3.0L/Turbo	1994-95	6G72 D0HC	MPI
Diamante 3.0L	1994-95	6G72	MPI
Galant 2.4L	1994-95	4G64	MPI
Mirage 1.8L – California	1994	4G93	MPI
Mirage 1.8L – Federal	1994-95	4G93	MPI

General information

Engine control module (ECM) incorporates self-diagnosis function. .
Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
ECM operates in backup mode if certain sensors fail, to enable car to be driven to workshop.
Trouble codes can be accessed with a voltmeter or a suitable code reader connected to the data link connector (DLC).

Accessing

Ensure ignition switched OFF.
Access data link connector (DLC):

o Mirage- [1].
o GalanU3000GT – [2]
o Diamante – [3]

Jump DLC terminal 1 and ground [4].
Switch ignition ON. Do NOT start engine.
MIL should be flashing.

o 1.5 second flashes indicate the ‘tens’ of the trouble code [5] [A].
o 0.5 second flashes indicate the ‘units’ of the trouble code [5] [B].
o A 0.5 second pause separates each flash [5] [C).
o A 2 second pause separates ‘tens’ and ‘units’ [5] [D].
o A 3 second pause separates each trouble code [5] [E].
o For example: Trouble code 24 displayed [5].

If no trouble codes are stored, short flashes will continue to be displayed.
If MIL remains ON: Suspect faulty engine control module (ECM).
Count MIL flashes and compare with trouble code table.
Switch ignition OFF.
Remove jump lead.

Erasing

Ensure ignition switched OFF.
Disconnect battery ground lead for 15 seconds minimum.
Reconnect battery ground lead.
Repeat checking procedure to ensure no data remains in ECM fault memory.

NOTE: Disconnecting battery ground lead may erase memory from electronic units such as radio.

Trouble code identification

Flash code	Fault location	Probable cause
11	Oxygen sensor (02S)/heated oxygen sensor (H02S) – front – malfunction	Wiring, 025/H025, fuel system, injectors, ECM
12	Volume air flow (VAF) sensor- malfunction	Wiring, VAF sensor, ECM
13	Intake air temperature (IAT) sensor- malfunction	Wiring, IAT sensor, ECM
14	Throttle position (TP) sensor – malfunction	Wiring, TP sensor, CTP switch, ECM
21	Engine coolant temperature (ECT) sensor- malfunction	Wiring, ECT sensor, ECM
22	Crankshaft position (CKP) sensor – malfunction	Wiring, CKP sensor, ECM
23	Camshaft position (CMP) sensor – malfunction	Wiring, CMP sensor, ECM
24	Vehicle speed sensor (VSS) – malfunction	Wiring, VSS, ECM
25	Barometric pressure (BARO) sensor- malfunction	Wiring, BARO sensor, ECM
31	Knock sensor (KS) – malfunction	Wiring, KS, ECM
36	Ignition timing adjustment	Wiring short to ground
39	Heated oxygen sensor (H02S) – fronVRH front – malfunction	Wiring, H025, fuel system, injectors, ECM
41	Injectors – malfunction	Wiring, injectors, ECM
42	Fuel pump – malfunction	Wiring, relay module, fuel pump, ECM
43	Exhaust gas recirculation (EGR) system – malfunction	Wiring, EGR, EGRT, EGRTVV, hose leak, ECM
44	Ignition coil/ignition module – cylinders 1 & 4 – malfunction	Wiring, ignition coil/module, ECM
52	Ignition coil/ignition module – cylinders 2 & 5 – malfunction	Wiring, ignition coil/module, ECM
53	Ignition coil/ignition module – cylinders 3 & 6 – malfunction	Wiring, ignition coil/module, ECM
55	Idle speed control (ISC) actuator position sensor – malfunction	Wiring, ISC actuator position sensor, ECM
59	Heated oxygen sensor (H02S) – rear/LH rear – malfunction	Wiring, H02S, ECM
61	AT – torque reduction signal – malfunction	Wiring, TCM
62	Intake manifold air control actuator position sensor – malfunction	Wiring, position sensor, actuator, ECM
69	Heated oxygen sensor (H02S) – RH rear – malfunction	Wiring, H025, ECM
71	· Traction control vacuum solenoid – malfunction	Wiring, solenoid, ECM
72	Traction control ventilation solenoid – malfunction	Wiring, solenoid, ECM