belt TOYOTA SUPRA 1995 Service Owners Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 1995, Model line: SUPRA, Model: TOYOTA SUPRA 1995Pages: 2543, PDF Size: 53.25 MB
Page 2006 of 2543
Trouble Area
Malfunction
Indicator
Lamp*
1
Memory*2
See page
Trouble Area
Normal
Mode
Test
Mode
Memory
See page
Open or short in injector circuit
Fuel line pressure (injector leak, blockage)
Mechanical system malfunction (skipping teeth of
timing belt)
Ignition system
Compression pressure (foreign object caught in valve)
Mass air flow meter (air intake)
ECM
ON
ON
EG±534
Open or short in heater circuit of sub heated oxygen
sensor.
Sub heated oxygen sensor
ECM
ON
N.A.
Open or short in sub heated oxygen sensor circuit
Sub heated oxygen sensor
ECM
ON
ON
EG±540
Open or short in mass air flow meter circuit
Mass air flow meter
ECM
ON
N.A.
EG±544
Actuator (for waste gate valve)
Short in VSV for waste gate valve circuit
ECM
ON
N.A.
EG±546
Open or short in turbo pressure sensor circuit
Turbo pressure sensor
ECM
ON
ON
EG±549
ECM
ON
ON
EG±549
*1, 2: See page EG±502.
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTINGEG±499
Page 2025 of 2543
DTC 13 G NE Signal Circuit (No.2)
CIRCUIT DESCRIPTION
Refer to G, NE signal circuit (No.1) on page EG±515
DTC No. Diagnostic Trouble Code Detecting Condition Trouble Area
No NE signal to ECM for 0.1 sec. or more at
1,000 rpm or more
Open or short in crankshaft position
sensor circuit
Crankshaft position sensor
ECM
13
NE signal does not pulse 12 times to ECM
during the interval between G1 and G2 pulses
Open or short in crankshaft position
sensor circuit
Mechanical system malfunction (skipping
teeth of timing belt, belt stretched)
Crankshaft position sensor
ECM
Deviation in G (G1, G2) and NE signal
Continues for 3 sec. during idling
throttle fully closed after engine warmed up
Mechanical system malfunction (skipping
teeth of timing belt, belt stretched)
Camshaft position sensor No. 1, No.2
ECM
INSPECTION PROCEDURE
Inspect sensor installation. Check if any teeth of NE signal plate are broken.
Tighten sensor.
Replace timing rotor.
Adjust valve timing (repair or replace timing belt).
Check valve timing (Check for loose and jumping teeth of timing belt
(See page EG±33)).
Check for intermittent problems.
(See page EG±505)
EG±518± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING
Page 2041 of 2543
DTC 25 26 Air±Fuel Ratio Lean Rich Malfunction
CIRCUIT DESCRIPTION
See EG±525 for the circuit description.
DTC No. Diagnostic Trouble Code Detecting Condition Trouble Area
(1) Main heated oxygen sensor voltage is
0.45 V or less (lean) for 90 sec. under
conditions (a) and (b):
(2 trip detection logic)*
2
(a) Engine coolant temp.: 70°C (158°F)
or more
(b) Engine speed: 1,500 rpm or more
Open or short in main heated oxygen
sensor circuit
Main heated oxygen sensor
Ignition system
ECM
25
(2) Engine speed varies by more than 20 rpm
over the preceding crank angle period
during a period of 25 sec. or more under
conditions (a) and (b):
(2 trip detection logic).*
(a) Engine speed: Below 950 rpm
(b) Engine coolant temp.: 80°C
(176°F) or
more
Open and short in injector circuit
Fuel line pressure (injector leak, blockage)
Mechanical system malfunction
(skipping teeth of timing belt)
Ignition system
Compression pressure (foreign object
caught in valve)
Mass air flow meter (air intake)
ECM
26
Engine speed varies by more than 20 rpm over
The preceding crank angle period during a
Period of 25 sec. or more under conditions (a)
And (b):
(2 trip detection logic).*
(a) Engine speed: Below 950 rpm
(b) Engine coolant temp.: 80°C
(176°F) or
more
Open and short in injector circuit
Fuel line pressure (injector leak, blockage)
Mechanical system malfunction
(skipping teeth of timing belt)
Ignition system
Compression pressure (foreign object
caught in valve)
Mass air flow meter (air intake)
ECM
*: See page EG±503. EG±534
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING