This project is for my bro-in-law but due to some problem, it has been lying about 1 year with 50% work done. It may be look simple for a BMW to accept a 1JZGTE from a Supra MA70 but this conversion has a lot things to do especially it's braking system and steering system.
It took me 3 days to make it alive, I managed to start the engine after encountered engine wiring left by my friend with some not connected and some wrongly connected. So my 3 days balik kampung(back to hometown) to Batu Pahat Johor was gone but meaningful.
1st attempt: put in a battery and crank
Result:no sound at all
2nd attempt: alternator wired with battery ,tank inspection, installed fuel pump,supply and return lines and crank
Result: It can be cranked but can't start.
3rd attempt:wired whole system including ecu and fuel pump.
Result: Not fired, ECU has false code 12 which means no ignition due to bad crank angle sensor.
How to read fault code:
Open small diagnostic box near fuses box, jump TE1 and E1 by using a 5cm long wire. Turn key to ign and count the codes from engine check light.
example 1 code
21 flash flash... flash
or
34flash flash flash... flash flash flash flash
If 2 codes stored (one after another)
14 & 52flash...flash flash flash flash............. flash flash flash flash flash... flash flash
4th attempt: After fixing crank angle sensor then only got fired.
Result: Engine fired...Whoooah!
A lot more things to do such as body wiring, intercooler piping,clutch system,braking and propeler shaft.
Reference: Toyota Fault Codes.
11
ECU(+B)
Diagnosis
Momentary interruption in power supply to ECU.
Trouble Area
Ignition switch circuit
Ignition switch
Main relay circuit
Main relay
ECU
12
RPM Signal
Diagnosis
No "NE" or "G" signal to ECU within 2 seconds after engine has been cranked.
Trouble Area
Distributor, or CPS, circuit
Distributor or CPS
Starter signal circuit
ECU
13
RPM Signal
Diagnosis
No "NE" signal to ECU when engine speed is about 1,000 RPM.
Trouble Area
Distributor, or CPS, circuit
Distributor or CPS
ECU
14
Ignition Signal
Diagnosis
No "IGF" signal to ECU "A" times in succession.A = 6-8 (7M-GE)A= 3 (7M-GTE)
Trouble Area
Igniter and ignition coil circuit
Igniter and ignition coil
ECU
21
Oxygen Sensor Signal
Diagnosis
Detection of oxygen sensor deterioration.
Trouble Area
Oxygen sensor circuit
Oxygen sensor
ECU
22
Water Temp Sensor Signal
Diagnosis
Open or short circuit in water temp sensor signal (THW).
Trouble Area
Water temp sensor circuit
Water temp sensor
ECU
24
Intake air Temp Sensor Signal
Diagnosis
Open or short circuit in intake air temp sensor signal (THA).
Trouble Area
Intake air temp sensor circuit
Intake air temp sensor
ECU
25
Air-Fuel Ratio Lean Malfunction
Diagnosis
When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
Injector circuit
Injector
Fuel line pressure
Air flow meter
Air intake system
Oxygen sensor circuit
Oxygen sensor
Ignition system
Water temp sensor
ECU
26
Air-Fuel Ratio Rich Malfunction
Diagnosis
When air-fuel ratio feedback compensation value or adaptive control value continues at the upper(lean) or lower(rich) limit renewed for a certain period of time.
When air-fuel ration feedback compensation value or adaptive control value feedback frequency is abnormally high during feedback condition.
When marked variation is detected in engine revolutions for each cylinder during idle switch on and feedback condition.
Trouble Area
Injector circuit
Injector
Fuel line pressure
Air flow meter
Cold start injector
Oxygen sensor circuit
Oxygen sensor
Water temp sensor
ECU
27
Sub-Oxygen Sensor Signal or Sensor Heater
Diagnosis(Sub-Oxygen Sensor Signal)
Open or short circuit in sub-oxygen sensor signal (OX2).
Trouble Area
Sub-oxygen sensor circuit
Sub-oxygen sensor
ECU
Diagnosis(Sub-Oxygen Sensor Heater)
Open or short circuit in sub-oxygen sensor heater (HT).
Trouble Area
Sub-oxygen sensor heater circuit
Sub-oxygen sensor heater
ECU
31
Air Flow Meter Signal
Diagnosis
(7M-GE) Open circuit in VC signal or short circuit between VS and E2 when idle contacts are closed.
(7M-GTE) Open or short circuit in air flow meter signal.
Trouble Area
Air flow meter circuit
Air flow meter
ECU
32
Air Flow Meter Signal(7M-GE)HAC Sensor Signal(7M-GTE)
Diagnosis(Air Flow Meter Signal(7M-GE))
Open circuit in E2 or short circuit between VC and VS.
Trouble Area
Air flow meter circuit
Air flow meter
ECU
Diagnosis(HAC Sensor Signal(7M-GTE))
Open circuit or short circuit in HAC sensor signal.
Trouble Area
ECU
34
Turbocharger Pressure
Diagnosis
The turbocharger pressure is abnormal.
Trouble Area
Turbocharger
Air flow meter
ECU
Intercooler system
41
Throttle Position Sensor Signal
Diagnosis
Open or short circuit in throttle position sensor signal.
Trouble Area
Throttle position sensor circuit
Throttle position sensor
ECU
42
Vehicle Speed Sensor Signal
Diagnosis
No "SPD" signal to ECU for 8 seconds when engine speed is between 2,500RPM and 4,500RPM (7M-GE) or 4,000RPM (7M-GTE) and coolant temp is below 80°C(176°F) and neutral start switch is off.
Trouble Area
Vehicle speed sensor circuit
Vehicle speed sensor
ECU
43
Starter Signal
Diagnosis
No "STA" signal to ECU until engine speed reaches 800RPM with vehicle not moving.
Trouble Area
Ignition switch circuit.
Ignition switch
ECU
51
Switch Signal
Diagnosis
No "IDL" signal, "NSW" signal or "A/C" signal to ECU, during diagnosis check.
Trouble Area
A/C switch circuit
A/C switch
A/C amplifier
Throttle position sensor circuit
Throttle position sensor
ECU
52
Knock Sensor Signal
Diagnosis
Open or short circuit in knock sensor signal.
Trouble Area
Knock sensor circuit
Knock sensor
ECU
53
Knock Control Signal in ECU
Diagnosis
Knock control program faulty.
Trouble Area
ECU
71
EGR System Malfunction
Diagnosis
EGR gas temp below predetermined level during EGR operation.
Open circuit in EGR gas temp sensor signal (THG).
Trouble Area
EGR system (EGR valve, EGR hose etc.)
EGR gas temp sensor circuit
EGR gas temp sensor
VSV for EGR circuit
VSV for EGR
ECU
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