1995 TOYOTA SUPRA sensor

LOWER SUSPENSION ARM AND STRUT
ROD REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, check ABS speed
sensor signal and rear wheel alignment.
(See page BR±62 and SA±9)
1. REMOVE REAR WHEEL
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
2. REMOVE REAR DRIVE SHAFT
(See page SA±46)
3. REMOVE REAR BRAKE CALIPER
(a) Remove the 2 bolts and brake caliper from the rear axle
carrier.
Torque: 104 NVm (1,065 kgfVcm, 77 ftVlbf)
(b) Support the brake caliper securely.
4. REMOVE STRUT ROD
Remove the 2 bolts, nuts and strut rod.
Torque: 184 NVm (1,880 kgfVcm, 134 ftVlbf)
INSTALLATION HINT: After stabilizing the suspension,
torque the bolts.
5. REMOVE LOWER SUSPENSION ARM NO.1
(a) Remove the nut.
Torque: 59 NVm (600 kgfVcm, 43 ftVlbf)
(b) Using SST, disconnect the lower suspension arm No.1 from
the rear axle carrier.
SST 09610±20012
NOTICE: Be careful not to damage the dust boot.
(c) Remove the bolt and disconnect the parking brake cable
bracket.
(d) Place matchmarks on the adjusting cam and subframe.
(e) Remove the adjusting cam and nut.
Torque: 184 NVm (1,880 kgfVcm, 134 ftVlbf)
INSTALLATION HINT: After stabilizing the suspension,
torque the nut.
(f) Remove the lower suspension arm No.1.
± SUSPENSION AND AXLEREAR SUSPENSIONSA±93

TORQUE SPECIFICATIONS
(FRONT)
 Part tightened NVm kgfVcm ftVlbf
 Hub nut 103 1,050 76
 Lower suspension arm x Suspension crossmember 226 2,300 166 
 Lower suspension arm bracket stay Bolt
Nut 
 43
59 
 440
600 
 32
43
 
 Axle hub lock nut
 
 199
 
 2,030
 
 147
 Upper suspension arm x Subframe 164 1,670 121
 Lower suspension arm x Shock absorber bracket 52 530 38
 Tie rod end x Steering knuckle 49 500 36
 Steering knuckle x Upper suspension arm 103 1,050 76 
 Steering knuckle x Lower suspension arm 
 125 
 1,270 
 92
 Disc brake caliper x Steering knuckle 11 8 1,200 87
 ABS speed sensor x Steering knuckle 8 80 69in.Vlbf
 Front shock absorber x Body 35 360 26
 Front shock absorber x Lower suspension arm 143 1,460 106 Front shock absorber x Suspension support 29 300 22 
 Stabilizer bar link x Lower suspension arm
 
 74
 
 750
 
 54
 Stabilizer bar link x Stabilizer bar 74 750 54
 Stabilizer bar bracket x Body 18 180 13
 Steering knuckle x Dust cover 8 85 74in.Vlbf
SA±102± SUSPENSION AND AXLESERVICE SPECIFICATIONS

(REAR)
 Part tightened NVm kgfVcm ftVlbf
 Hub nut 103 1,050 76
 Rear shock absorber x Lower suspension arm No.2 137 1,400 101
 Upper suspension arm x Suspension crossmember 164 1,670 271 Rear axle carrier x Disc brake caliper 104 1,065 77 
 Lower suspension arm No.1 x Rear axle carrier
 
 59
 
 600
 
 43
 Lower suspension arm No.1 x Subframe 184 1,880 136
 Lower suspension arm No.2 x Rear axle carrier 150 1,525 11 0
 Lower suspension arm No.2 x suspension crossmember 184 1,880 136
 Lower suspension arm bracket x Subframe 18 180 13 
 ABS speed sensor x Rear axle carrier
 
 8
 
 80
 
 69in.Vlbf
 Strut rod x Rear axle carrier 184 1,880 136
 Strut rod x Body 184 1,880 136
 Rear drive shaft x Axle hub 289 2,950 213
 Upper suspension arm x Rear axle carrier 109 1,110 80 
 Backing plate x Rear axle carrier 
 26 
 260 
 19
 Rear axle carrier x Backing plate (Hexagon bolt) 180 1,825 132
 Rear drive shaft x Differential 83 850 61
 Differential x Propeller shaft 79 805 58
 
 Differential mounting bolt Front
Rear 
 123
142 
 1,250
1,450 
 90
105
 Ring gear x Differential case See page SA±71 
 Differential carrier retainer set bolt 2JZ±GTE M/T
Except 2JZ±GTE M/T 
 47
22 
 480
225 
 35
16
 
 Differential carrier cover set bolt 2JZ±GTE M/T
Except 2JZ±GTE M/T
 
 78
47
 
 800
475
 
 58
34
 
 Drain (Filler) plug
 
 49
 
 500
 
 36
 Breather plug 21 210 15
 Shock absorber x Body 26 260 19
 Suspension support x Shock absorber 27 280 20
 Stabilizer bar link x Lower suspension arm No.2 74 750 54 
 Stabilizer bar link x Stabilizer bar
 
 74
 
 750
 
 54
 Stabilizer bar bracket x Body 31 320 23
± SUSPENSION AND AXLESERVICE SPECIFICATIONSSA±103

DIAGNOSIS SYSTEM
DESCRIPTION
The ECM contains a built±in self±diagnosis system by which
troubles with the engine signal network are detected and a Mal-
function Indicator Lamp on the instrument panel lights up.
By analyzing various signals as shown in a later table (See page
EG±388) the Engine Control Module (ECM) detects system mal-
functions relating to the sensors or actuators.
In the normal mode, the self±diagnosis system monitors 18
(California specification vehicles) or 17 (except for California and
Canadian specification) items, indicated by code No. as shown in
EG±388. A malfunction indicator lamp informs the driver that a
malfunction has been detected. The lamp goes off automatically
when the malfunction has been repaired, but the diagnostic
trouble code(s) remains stored in the ECM memory (except for
code Nos. 16 and 53). The ECM stores the code(s) until it is
cleared by removing the EFI No. 1 fuse with the ignition switch
OFF.
The diagnostic trouble code can be read by the number of blinks
of the malfunction indicator lamp when TE1 and E1 terminals on
the data link connector 1 or 2 are connected. When 2 or more
codes are indicated, the lowest number (code) will appear first.
In the test mode, 12 (California specification vehicles) or 11 (ex-
cept for California and Canadian specification vehicles) items, in-
dicated by code No. as shown in EG±388 are monitored. If a mal-
function is detected in any one of the systems indicated by code
Nos. 13, 21, 22, 24, 25, 26, 27, 28, 35, 41, 71 and 78 (California
specification vehicles) or 13, 21, 22, 24, 25, 28, 35, 41, 71 and 78
(except for California and Canadian specification vehicles) the
ECM lights the malfunction indicator lamp to warn the technician
that a malfunction has been detected. In this case, TE2 and E1
terminals on the data link connector 2 should be connected as
shown later. (See page EG±386).
In the test mode, even if the malfunction is corrected, the malfunc-
tion code is stored in the ECM memory even when the ignition
switch OFF (except code Nos. 43 and 51). This also applies in the
normal mode. The diagnostic trouble mode (normal or test) and
the output of the malfunction indicator lamp can be selected by
connecting the TE1, TE2 and E1 terminals on the data link con-
nector 2, as shown later.
A test mode function has been added to the functions of the self±
diagnosis system of the normal mode for the purpose of detecting
malfunctions such as poor contact, which are difficult to detect in
the normal mode. This function fills up the self±diagnosis system.
The test mode can be implemented by the technician following the
appropriate procedures of check terminal connection and opera-
tion described later. (See page EG±386) EG±384
± ENGINE2JZ±GE ENGINE TROUBLESHOOTING

Diagnosis Inspection (Test Mode)
Compared to the normal mode, the test mode has an in-
creased sensing ability to detect malfunctions.
It can also detect malfunctions in the starter signal circuit, the
IDL contact signal of the throttle position sensor, air condi-
tioning signal and park/neutral position switch signal.
Furthermore, the same diagnostic items which are detected
in the normal mode can also be detected in the test mode.
DIAGNOSTIC TROUBLE CODE CHECK
1. Initial conditions.
(a) Battery voltage 11 V or more
(b) Throttle valve fully closed
(c) Transmission in neutral position
(d) Air conditioning switched OFF
2. Turn ignition switch OFF
3. Using SST, connect terminals TE2 and E1 of the data link
connector 2.
SST 09843±18020
4. Turn ignition switch ON.
HINT:
wTo confirm that the test mode is operating, check that the
malfunction indicator lamp flashes when the ignition
switch is turned to ON.
wIf the malfunction indicator lamp does not flash, proceed
to troubleshooting of the TE2 terminal circuit on page
EG±484.
5. Start the engine.
6. Simulate the conditions of the malfunction described by the
customer.
7. After the road test, using SST, connect terminals TE1 and E1
of the data link connector 2.
SST 09843±18020
8. Read the diagnostic trouble code on malfunction indicator
lamp on the telltale light RH (See page EG±385).
9. After completing the check, disconnect terminals TE1, TE2
and E1, and turn off the display.
HINT:
wThe test mode will not start if terminals TE2 and E1 are
connected after the ignition switch is turned ON.
wWhen the engine is not cranked, diagnostic trouble
codes º43º (Starter signal) output, but this is not
abnormal.
wWhen the automatic transmission shift lever is in the ºDº,
º2º, ºLº or ºRº shift position, or when the air conditioning
is on or when the accelerator pedal is depressed, code
º51º (Switch condition signal) is output, but this is not
abnormal. EG±386
± ENGINE2JZ±GE ENGINE TROUBLESHOOTING

DIAGNOSTIC TROUBLE CODE CHART
HINT: Parameters listed in the chart may not be exactly the same as your reading due to type of the instruments
or other factors.
~
DTC
No.Number of
MIL BlinksCircuitDiagnostic Trouble Code Detecting Condition
NormalNo code is recorded.
G, NE Signal
(No.1)
G, NE Signal
(No.2)
Ignition Signal
A/T Control
Signal
(Main heated *3)
Oxygen
Sensor Signal
(Fr)
No NE or G1 and G2 signal to ECM for 2 sec. or more after cranking
Open in ªG
º circuit
No NE signal to ECM for 0.1 sec. or more at 1,000 rpm or more
NE signal does not pulse 12 times to ECM during the interval between
G1 and G2 pulses
No IGF signal to ECM for 6 consecutive IGT signals
Fault in communications between the engine CPU and A/T CPU in the
ECM
(1)*3Open or short in heater circuit of main heated oxygen sensor (Fr)
for 0.5 sec. or more
(2) (Main heated*3) oxygen sensor (Fr) signal voltage is reduced to
between 0.35 V and 0.70 V for 90 sec. under conditions
(a) ~ (d):
(2 trip detection logic)*4
(a) Engine coolant temp.: Between 80°C (176°F) and
95°C (203°F)
(b) Engine speed: 1,500 rpm or more
(c) Load driving (example A/T in in Overdrive, (5th for M/T),
A/C ON, Flat road, 80 km/H (50 mph))
(d) (Main heated*
3) oxygen sensor (Fr) signal voltage:
Alternating above and below 0.45 V
*3, 4: See page EG±396, 397. EG±388
± ENGINE2JZ±GE ENGINE TROUBLESHOOTING

If a malfunction code is displayed during the diagnostic trouble code check in test mode, check the circuit for
that code listed in the table below (Proceed to the page given for that circuit).
EG±409
EG±412
EG±413
EG±418
EG±419
Malfunction
Indicator
Lamp*
1Trouble Area
Normal
ModeTest
Mode
See pageMemory*2
ON
ON
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
N.A.
ON
ON
ON
ON

Open or short in NE, G circuit

Distributor

Open or short in STA circuit

ECM

Open or short in NE circuit

Distributor

ECM

Open or short in NE circuit

Distributor

ECM

Open or short in IGT or IGT circuit from igniter to ECM

Igniter

ECM

ECM

Open or short in heater circuit of main heated oxygen
sensor (Fr)

Main heated oxygen sensor (Fr) heater

ECM

(Main heated*3) oxygen sensor (Fr) circuit

(Main heated*3) oxygen sensor (Fr)
*1, 2, 3: See page EG±396
± ENGINE2JZ±GE ENGINE TROUBLESHOOTINGEG±389

DTC
No.Number of
MIL BlinksCircuitDiagnostic Trouble Code Detecting Condition
Engine Coolant
Temp. Sensor
Circuit
Intake Air Temp.
Sensor Signal
Air±Fuel Ratio
Lean Malfunction
Open or short in engine coolant temp. sensor circuit for 0.5 sec.
or more
Open or short in intake air temp. sensor circuit for 0.5 sec. or
more
(1) (Main heated*3) oxygen sensor voltage is 0.45 V or less (lean)
for 90 sec. under conditions (a) and (b):
(2 trip detection logic)*
4
(a) Engine speed: 1,500 rpm or more
(b) Engine coolant temp.: 70°C (158°F) or more
(2)*3Difference of air±fuel ratio feedback compensation value
between front (no.1 ~ 3 cylinders) and rear (No.4 ~ 6
cylinders) is more tan 15 percentage for 20 sec. or more
under conditions (a) and (b):
(2 trip detection logic)*
4
(a) Engine speed: 2,000 rpm or more
(b) Engine coolant temp.: Between 60°C (140°F) and
95°C (203°F)
(3)*3Engine speed varies by more than 15 rpm over the preceding
crank angle period during a period o 20 sec. or more under
conditions (a) and (b):
(2 trip detection logic)*
4
(a) Engine speed: Idling
(b) Engine coolant temp.: Between 60°C (140°F) and
95°C (203°F)
*3, 4: See page EG±396 397. EG±390
± ENGINE2JZ±GE ENGINE TROUBLESHOOTING