Page 577 of 1807

DI-162
- DIAGNOSTICSENGINE (2JZ-GTE)
390 Author: Date:
1997 SUPRA (RM502U)DTC No.
(See Page)
Detection ItemTrouble AreaMIL*Memory
P1605
(DI-284)Knock Control CPU
MalfunctionECM
P1630
(DI-285)Traction Control System
Malfunction
Open or short in ETC+ or ETC- circuit
Open or short in EFI+ or EFI- circuit
Throttle control ECU
ECM
-
P1652
(DI-287)IACV Control CIrcuit
MalfunctionOpen or short in VSV circuit for IACV
VSV for IACV
ECM
P1658
(DI-291)Waste Gate Valve Control CIrcuit
MalfunctionOpen or short in VSV circuit for waste gate valve
VSV for waste gate valve
ECM
P1661
(DI-294)Exhaust Gate Valve Control CIr-
cuit MalfunctionOpen or short in VSV circuit for exhaust gate control valve
VSV for exhaust gate control valve
ECM
P1662
(DI-297)Exhaust Bypass Valve Control
CIrcuit MalfunctionOpen or short in VSV circuit for exhaust bypass valve
VSV for exhaust bypass valve
ECM
P1780
(DI-300)Park / Neutral Position Switch
MalfunctionShort in park / neutral position switch circuit
Park / neutral position switch
ECM
*: .... MIL dose not light up
... MIL lights up
Page 578 of 1807
DI4SJ-01
S04073
Throttle Control ECU
VSV for Intake
Air Control Valve
(VSV1)
VSV for EXhaust
Bypass Valve
(VSV3) Heated Oxygen Sensor
(Bank 1 Sensor 1)
Ignition Coil
Mass Air Flow Meter
(Intake Air Temp. Sensor)
Engine Coolant Temp.
Sensor
VSV for Exhaust
Gas Control Valve
(VSV 2)
VSV for Waste
Gate Valve
(VSV4)VSV for EGR
ECM
IAC Valve
DLC1EGR Gas Temp. Sensor
Ignition Switch
Combination Meter
& Telltale Light RH
Fuel Pump ECU
Fuel Pump
No.1 Vehicle Speed Sensor
DLC3
Park/Neutral Position Switch
Stop Light Switch
Heated Oxygen Sensor
(Bank 1 Sensor 2) Igniter
Knock Sensor 2
Camshaft Position Sensor No.2
VSV for EVAP
Turbo Pressure Sensor
Camshaft Position Sensor No.1
Throttle Position Sensor
Sub Throttle Actuator Knock Sensor 1
Sub Throttle Position Sensor
Crankshaft Position Sensor
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-163
391 Author: Date:
1997 SUPRA (RM502U)
PARTS LOCATION
Page 579 of 1807

DI4SK-01
S00576
P11278
ECM
FI6451
CHECK HARNESS A
ECU
FI6522
Before Connection
After Connection
Female
Connector Bolt
Collar
Stopper
Nut
Connector
Male
FI6523
Less Than 1 mm (0.04 in.) DI-164
- DIAGNOSTICSENGINE (2JZ-GTE)
392 Author: Date:
1997 SUPRA (RM502U)
TERMINALS OF ECM
Connectors of the ECM are water-proof and are the bolt type.
For water proof type connectors, in order to measure the volt-
age of ECM terminals and the resistance of connected parts,
connect the inspection check harness between the ECM and
vehicle wire harness, then perform the inspection.
The inspection method of inserting a tester probe from the other
side of connector noticeably reduces the water-proof ability.
Disconnect the connector by fully loosening the bolt.
PREPARATION
(a) Turn the ignition switch to LOCK position.
(b) Turn up the passenger side floor mat.
(c) Remove the ECM protector.
(d) Disconnect the connectors from the ECM.
After completely loosening the bolt, the 2 parts of connec-
tor can be separated.
NOTICE:
Do not pully the wire harness when disconnecting the
connector.
When disconnecting the connector, the ECM's back-
up power source is cut off, so the DTC, etc. recorded
in the ECM memory are cancelled.
Never insert a tester probe or male terminal used for
inspection purposes into the female terminal of the
vehicle wire harness. Otherwise, the female terminal
may be widened, which can result in faulty connec-
tion.
(e) Connect the Check Harness A between ECM and con-
nector of vehicle wire harness.
SST 09990-01000
HINT:
The arrangement of the DLC1 terminals are the same as those
of the ECM (See page DI-164).
(f) Disconnect the Check Harness A.
(g) Reconnect the connectors to the ECM.
(1) Match the male connector correctly with female
connector, then press them together.
(2) Tighten the bolt.
Make sure the connector is completely connected,
by tightening the bolt until there is a clearance of
less than 1 mm (0.04 in.) between bottom of the
male connector and end of the female connector.
(h) Install the ECM protector and floor mat.
Page 580 of 1807

FI6460
ECM Terminals
B(E9)A(E10)
1
2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
30 29 28 27 26 25 24 23 22 21
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 211 2
3 4 5 6 7 8 9 10 19 18 17 16 15 14 13 12 11
20
40 39 38 37 36 35 34 33 32 31
50 49 48 47 46 45 44 43 42 41
70 69 68 67 66 65 64 63 62 61 60
59 58 57 56 55 54 53 52 51
8079 78 77 76 75 74 73 72 71
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-165
393 Author: Date:
1997 SUPRA (RM502U)Symbols (Terminals No.)
Wiring ColorConditionSTD Voltage (V)
BATT (A33) - E1 (B69)B-W e BRAlways9 - 14
IGSW (A1) - E1 (B69)B-W e BRIG switch ON9 - 14
+B (A31) - E1 (B69)B-R e BRIG switch ON9 - -14
VCC (B41) - E2 (B65)L-Re W-BIG switch ON4.5 - 5.5
IDL1 (B64) E2 (B65)RWB
IG switch ON and apply vacuum to the throttle opener
Main throttle valve fully closed-0.1 - 3.0
IDL1 (B64) - E2 (B65)R e W-BIG switch ON
Main throttle valve fully opened9 - 14
IDL2 (B63) E2 (B65)GR RWB
IG switch ON
Sub-throttle valve fully closed-0.1 - 3.0
IDL2 (B63) - E2 (B65)GR-R e W-BIG switch ON
Sub-throttle valve fully open9 - 14
VTA1 (B43) E2 (B65)YWB
IG switch ON
Main or sub-throttle valve fully closed0.3 - 0.8
VTA1 (B43) - E2 (B65)Y e W-BIG switch ON
Main or sub-throttle valve fully open3.2 - 4.9
VTA2 (B42) E2 (B65)YLWB
IG switch ON
Main or sub-throttle valve fully closed0.3 - 0.8
VTA2 (B42) - E2 (B65)Y-L e W-BIG switch ON
Main or sub-throttle valve fully open3.2 - 4.9
VG (B66) - E2G (B28)Y-R e BRIdling0.7 - 1.7
THA (B45) - E2 (B65)P-L e W-BIdling, Intake air temp. 0°C (32°F) to 80°C (176°F)0.5 - 3.4
THW (B44) - E2 (B65)L-Y e W-BIdling, Engine Coolant temp. 60°C (140°F) to 120°C (248°F)0.2 - 1.0
THG (B46) - E2 (B65)BR-Y e W-BIdling after warning up1 - 4
STA (B77) - E1 (B69)B e BRCranking6.0 or more
IG switch ON9 - 14
#10 (B20) - E01 (B80)R-L e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#20 (B19) - E01 (B80)R-Y e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#30 (B18) - E01 (B80)R-G e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#40 (B17) - E01 (B80)R-W e BRIdlingPulse generation
(See page DI-204)
Page 581 of 1807

DI-166
- DIAGNOSTICSENGINE (2JZ-GTE)
394 Author: Date:
1997 SUPRA (RM502U)
IG switch ON9 - 14
#50 (B16) - E01 (B80)R e BRIdlingPulse generation
(See page DI-204)
IG switch ON9 - 14
#60 (B15) - E01 (B80)R-B e BRIdlingPulse generation
(See page DI-204)
IG switch ON- 0.1 - 0.5
IGT1 (B57) - E1 (B69)R-W e BRIdlingPulse generation
(See page DI-252)
IG switch ON- 0.1 - 0.5
IGT2 (B56) - E1 (B69)W-R e BRIdlingPulse generation
(See page DI-252)
IG switch ON- 0.1 - 0.5
IGT3 (B55) - E1 (B69)LG e BRIdlingPulse generation
(See page DI-252)
IG switch ON- 0.1 - 0.5
IGT4 (B54) - E1 (B69)B-R e BRIdlingPulse generation
(See page DI-252)
IG switch ON- 0.1 - 0.5
IGT5 (B53) - E1 (B69)L e BRIdlingPulse generation
(See page DI-252)
IG switch ON- 0.1 - 0.5
IGT6 (B52) - E1 (B69)R e BRIdlingPulse generation
(See page DI-252)
IG switch ON4.5 - 5.5
IGF (B58) - E1 (B69)R-Ye BRIdlingPulse generation
(See page DI-252)
G1 (B26) - G1 (B6)W e OIdlingPulse generation
(See page DI-215)
G2 (B25) - NE (B7)B-W e BRIdlingPulse generation
(See page DI-215)
NE (B27) - NE (B7)B-R e BRIdlingPulse generation
(See page DI-215)
M-REL (A24) - E1 (B69)GR e BRIG switch ON9 - 14
IG switch ONBelow 0.5
FPC (A22) - E1 (B69)V-W e BRIdlingPulse generation
(4.0 - 5.5)
DI (A21) - E1 (B69)G e BRIdling7.0 or more
EVAP (B74) - E01 (B80)V e BRIG switch ON9 - 14
EGR (B75) - E01 (B80)P e BRD posiiton stall rpm: 1,600 ~ 1,800 rpmPulse generation or
Below 2.0
EGR (B75) E01 (B80)P e BR
Idling9 - 14
ISC1 (B35) - E01 (B80)V-Y e BRIdling, When A/C Switch ON or OFFPulse generation
(See page DI-240)
ISC2 (B34) - E01 (B80)G-W e BRIdling, When A/C Switch ON or OFFPulse generation
(See page DI-240)
ISC3 (B33) - E01 (B80)G-O e BRIdling, When A/C Switch ON or OFFPulse generation
(See page DI-240)
Page 582 of 1807

- DIAGNOSTICSENGINE (2JZ-GTE)
DI-167
395 Author: Date:
1997 SUPRA (RM502U) ISC4 (B32) - E01 (B80)
R-G e BRIdling, When A/C Switch ON or OFFPulse generation
(See page DI-240)
OX1 (B48) - E1 (B69)W e BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page DI-193)
OXS (B47) - E1 (B69)R-L e BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page DI-193)
HT1 (B71) E01 (B80)BLBRIdling after warning upBelow 3.0HT1 (B71) - E01 (B80)B-L e BRIG switch ON9 - 14
HTS (B72) E01 (B80)BR WBRIdling after warning upBelow 3.0HTS (B72) - E01 (B80)BR-W e BRIG switch ON9 - 14
KNK1 (B50) - E1 (B69)W e BRIdlingPulse generation
(See page DI-212)
KNK2 (B49) - E1 (B69)W e BRIdlingPulse generation
(See page DI-212)
NSW (B76) E1 (B69)BWBR
IG switch ON
Other shift position in ºPº or ºNº position9 - 14
NSW (B76) - E1 (B69)B-W e BRIG switch ON
Shift position in ºPº or ºNº position0 - 3.0
SPD (A2) - E1 (B69)P e BRIG switch ON
Rotate driving wheel slowlyPulse generation
(See page DI-238)
TE1 (A20) - E1 (B69)L e BRIG switch ON9 - 14
W (A6) E1 (B69)LBBRIdling9 - 14W (A6) - E1 (B69)L-B e BRIG switch ON0 - 3.0
OD1 (A12) - E1 (B69)BR-B e BRIG switch ON9 - 14
AC1 (A34) E1 (B69)LRBRA/C switch ON (At idling)0 - 1.5AC1 (A34) - E1 (B69)L-R e BRA/C switch OFF7.5 - 14
ACMG (A23) E01 (B80)WGBRA/C switch ON (At idling)0 - 3.0ACMG (A23) - E01 (B80)W-G e BRA/C switch OFF9 - 14
FPU (B73) E01 (B80)WLBRIG switch ON9 - 14FPU (B73) - E01 (B80)W-L e BRRestarting at high engine coolant temp.Below 2.0
ELS (A15) E1 (B69)RYBRDefogger switch or taillight switch ON7.5 - 14ELS (A15) - E1 (B69)R-Y e BRDefogger switch and taillight switch OFF-0.1 - 1.5
SDL (A8) - E1 (B69)G e BRDuring transmissionPulse generation
VSV1 (B40) E1 (B69)GBBRImmediately after racingBelow 3.0VSV1 (B40) - E1 (B69)G-B e BRIdling9 - 14
VSV2 (B39) E1 (B69)GYBRFor 2 sec. after IG switch ON to OFFBelow 3.0VSV2 (B39) - E1 (B69)G-Y e BRIdling9 - 14
VSV3 (B38) - E1 (B69)B-Y e BRIdling9 - 14
VSV4 (B60) - E1 (B69)L-W e BR
Idling and other shift position ºPº or ºNº position (for A/T).
Idling (for M/T)Below 3.0VSV4 (B60) E1 (B69)LW e BR
Idling and shift position ºPº or ºNº position (for A/T)9 - 14
IG switch ON2.3 - 3.0
PIM1 (B62) - E2 (B65)B-Y e W-BIG switch ON and apply vacuum 26.7 kPa
(200 mm Hg, 7.9 in. Hg)1.0 - 1.5
EFI+ (A27) - E2 (B65)B e W-BIG switch ONPulse generation
(See page DI-285)
EFI- (A26) - E2 (B65)W e W-BIG switch ONPulse generation
(See page DI-285)
Page 583 of 1807
DI-168
- DIAGNOSTICSENGINE (2JZ-GTE)
396 Author: Date:
1997 SUPRA (RM502U) ETC+ (A14) - E2 (B65)
Y e W-BIG switch ONPulse generation
(See page DI-285)
ETC- (A13) - E2 (B65)BR e W-BIG switch ONPulse generation
(See page DI-285)
Page 584 of 1807

DI4SL-01
- DIAGNOSTICSENGINE (2JZ-GTE)
DI-169
397 Author: Date:
1997 SUPRA (RM502U)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed in the DTC check and the problem still can not be confirmed
in the basic inspection, then proceed to this step and perform troubleshooting according to the numbered
order given in the table below.
SymptomSuspect AreaSee page
Does not start (Engine does not crank)1. Starter and Starter relayST-14, ST-16
Does not start (No initial combustion)
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)DI-304
DI-248
IN-18
Does not start (No complete combustion)1. Fuel pump control circuitDI-248
Difficult to start (Engine cranks normally)
1. Starter signal circuit
2. Fuel pump control circuit
3. CompressionDI-301
DI-248
EM-3
Difficult to start (Cold engine)1. Starter signal circuit
2.Fuel pump control circuitDI-301
DI-248
Difficult to start (Hot engine)
1. Starter signal circuit
2. Fuel pressure control circuit
3. Fuel pump control circuitDI-301
DI-309
DI-248
Poor idling (High engine idle speed)1. A/C signal circuit
2. ECM power source circuitDI-722
DI-304
Poor idling (Low engine idle speed)1. A/C signal circuit
2. Fuel pump control circuitDI-722
DI-248
Poor idling (Rough idling)1. Compression
2. Fuel pump control circuitEM-3
DI-248
Poor idling (Hunting)1. ECM power source circuit
2. Fuel pump control circuitDI-304
DI-248
Poor Driveability (Hesitation/Poor acceleration)1. Fuel pump control circuit
2. A/T faultyDI-248
DI-391
Poor Driveability (Surging)1. Fuel pump control circuitDI-248
Engine stall (Soon after starting)1. Fuel pump control circuitDI-248
Engine stall (During A/C operation)1. A/C signal circuit
2. Engine control module (ECM)DI-722
IN-18