05−374

DIAGNOSTICS − SFI SYSTEM (3MZ−FE)

05286−25

TERMINALS OF ECM

E7 E8 E9 E6 E5

A53766

Each ECM terminal’s standard voltage is shown in the table below.

In the table, first follow the information under ”Condition”. Next look under ”Symbols (Terminal No.)” for the
terminals to be inspected. The standard voltage between the terminals is shown under ”Specific Condition”.
Use the illustration above as a reference for the ECM terminals.
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specific Condition
Battery (for measuring
BATT (E5−3) − E1 (E9−1) BR − BR battery voltage and for Always 9 to 14 V
ECM memory)
Power source of throttle
+BM (E6−6) − E1 (E9−1) W − BR Always 9 to 14 V
motor
IGSW (E5−9) − E1 (E9−1) P − BR Ignition switch Ignition switch ON 9 to 14 V
+B (E5−1) − E1 (E9−1) W − BR Power source of ECM Ignition switch ON 9 to 14 V
+B2 (E5−2) − E1 (E9−1) W − BR Power source of ECM Ignition switch ON 9 to 14 V
Pulse generation
OC1+ (E9−16) − OC1− (E9−15) G−W − G−R Camshaft timing (OCV) Ignition switch ON
(See page 05−428)
Pulse generation
OC2+ (E9−14) − OC2− (E9−13) L−R − G−B Camshaft timing (OCV) Ignition switch ON
(See page 05−428)
MREL (E5−8) − E1 (E9−1) B − BR EFI relay Ignition switch ON 9 to 14 V
Power source of sensor
VC (E7−18) − E2 (E7−28) Y − BR Ignition switch ON 4.5 to 5.5 V
(specific voltage)
Idling, shift lever position P or N,
VG (E7−30) − E2G (E7−29) R − L−W Mass air flow meter 0.5 to 3.0 V
A/C switch OFF
Intake air temperature
THA (E7−20) − E2 (E7−28) L−B − BR Idling, intake air temp. 20˚C (68˚F) 0.5 to 3.4 V
sensor
Engine coolant tempera- Idling, engine coolant temp. 80˚C
THW (E7−19) − E2 (E7−28) G−B − BR 0.2 to 1.0 V
ture sensor (176˚F)
Throttle position sensor Ignition switch ON, throttle valve ful-
VTA1 (E7−21) − E2 (E7−28) R−W − BR 0.5 to 1.2 V
(for engine control) ly closed
Throttle position sensor Ignition switch ON, throttle valve ful-
VTA1 (E7−21) − E2 (E7−28) R−W − BR 3.2 to 4.8 V
(for engine control) ly open
Throttle position sensor
Ignition switch ON, accelerator ped-
VTA2 (E7−31) − E2 (E7−28) B−R − BR (for sensor malfunction 2.1 to 3.1 V
al released
detection)
Throttle position sensor
Ignition switch ON, accelerator ped-
VTA2 (E7−31) − E2 (E7−28) B−R − BR (for sensor malfunction 4.5 to 5.5 V
al depressed
detection)
Accelerator pedal position
Ignition switch ON, accelerator ped-
VPA (E5−22) − EPA (E5−28) B−R sensor (for engine con- 0.5 to 1.1 V
al released
trol)
Accelerator pedal position
Ignition switch ON, accelerator ped-
VPA (E5−22) − EPA (E5−28) B−R sensor (for engine con- 2.6 to 4.5 V
al depressed
trol)

2004 HIGHLANDER REPAIR MANUAL (RM1086U)

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DIAGNOSTICS − SFI SYSTEM (3MZ−FE)

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specific Condition
Accelerator pedal position
Ignition switch ON, accelerator ped-
VPA2 (E5−23) − EPA2 (E5−29) W − BR sensor (for sensor mal- 1.2 to 2.0 V
al released
function detection)
Accelerator pedal position
Ignition switch ON, accelerator ped-
VPA2 (E5−23) − EPA2 (E5−29) W − BR sensor (for sensor mal- 3.4 to 5.3 V
al depressed
function detection)
Power source of acceler-
VCPA (E5−26) − EPA (E5−28) G−R ator pedal position sensor Ignition switch ON 4.5 to 5.5 V
(for VPA)
Power source of acceler-
VCP2 (E5−27) − EPA2 (E5−29) L − BR ator pedal position sensor Ignition switch ON 4.5 to 5.5 V
(for VPA2)
HA1A (E8−5) − E04 (E8−7) B−W − W−B
A/F sensor heater Idling Below 3.0 V
HA2A (E8−4) − E05 (E8−6) R−W − W−B
HA1A (E8−5) − E04 (E8−7) B−W − W−B
A/F sensor heater Ignition switch ON 9 to 14 V
HA2A (E8−4) − E05 (E8−6) R−W − W−B
A1A+ (E8−22) − E1 (E9−1) BR − BR A/F sensor Ignition switch ON 3.0 to 3.6 V
A2A+ (E8−23) − E1 (E9−1) P − BR A/F sensor Ignition switch ON 3.0 to 3.6 V
A1A− (E8−30) − E1 (E9−1) Y − BR A/F sensor Ignition switch ON 2.7 to 3.3 V
A2A− (E8−31) − E1 (E9−1) L − BR A/F sensor Ignition switch ON 2.7 to 3.3 V
HT1B (E8−25) − E2 (E7−28) R−Y − BR Heated oxygen sensor
Idling Below 3.0 V
HT2B (E8−33) − E2 (E7−28) W−L − BR heater
HT1B (E8−25) − E2 (E7−28) R−Y − BR Heated oxygen sensor
Ignition switch ON 9 to 14 V
HT2B (E8−33) − E2 (E7−28) W−L − BR heater
OX1B (E8−21) − E2 (E7−28) W − BR Maintain engine speed at 2,500 rpm
Heated oxygen sensor Pulse generation
OX2B (E8−29) − E2 (E7−28) B − BR for 2 minutes after warming up
#10 (E7−1) − E01 (E7−7) L − W−B
#20 (E7−2) − E01 (E7−7) Y − W−B
#30 (E7−3) − E01 (E7−7) B − W−B
Injector Ignition switch ON 9 to 14 V
#40 (E7−4) − E01 (E7−7) W − W−B
#50 (E7−5) − E01 (E7−7) B−E − W−B
#60 (E8−3) − E01 (E7−7) G − W−B
#10 (E7−1) − E01 (E7−7) L − W−B
#20 (E7−2) − E01 (E7−7) Y − W−B
#30 (E7−3) − E01 (E7−7) B − W−B Pulse generation
Injector Idling
#40 (E7−4) − E01 (E7−7) W − W−B (See page 05−490)
#50 (E7−5) − E01 (E7−7) B−W − W−B
#60 (E8−3) − E01 (E7−7) G − W−B
Maintain engine speed at 4,000 rpm Pulse generation
KNK1 (E8−1) − EKNK (E8−28) B−W Knock sensor
after warming up (See page 05−506)
Maintain engine speed at 4,000 rpm Pulse generation
KNK2 (E8−2) − EKN2 (E8−20) R−G Knock sensor
after warming up (See page 05−506)
Pulse generation
VV1+ (E9−27) − NE− (E9−24) B−W − G VVT sensor Idling
(See page 05−513)
Pulse generation
VV2+ (E9−26) − NE− (E9−24) L−G VVT sensor Idling
(See page 05−513)
Crankshaft position sen- Pulse generation
NE+ (E9−25) − NE− (E9−24) R−G Idling
sor (See page 05−513)
IGT1 (E7−8) − E1 (E9−1) R−L − BR
IGT2 (E7−9) − E1 (E9−1) P − BR
IGT3 (E7−10) − E1 (E9−1) Y−B − BR Ignition coil with igniter Pulse generation
Idling
IGT4 (E7−11) − E1 (E9−1) L−Y − BR (ignition signal) (See page 05−521)
IGT5 (E7−12) − E1 (E9−1) G−Y − BR
IGT6 (E7−13) − E1 (E9−1) L−R − BR

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DIAGNOSTICS − SFI SYSTEM (3MZ−FE)

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specific Condition
Ignition coil with igniter
IGF1 (E7−24) − E1 (E9−1) W−R − BR (ignition confirmation sig- Ignition switch ON 4.5 to 5.5 V
nal)
Ignition coil with igniter
Pulse generation
IGF1 (E7−24) − E1 (E9−1) W−R − BR (ignition confirmation sig- Idling
(See page 05−521)
nal)
PRG (E7−34) − E1 (E9−1) G − BR EVAP VSV Ignition switch ON 9 to 14 V
CCV (E7−27) − E1 (E9−1) L − BR CCV Ignition switch ON 9 to 14 V
PTNK (E5−21) − E1 (E9−1) L − BR Vapor pressure sensor Ignition switch ON 2.9 to 3.7 V
Ignition switch ON, apply vacuum
PTNK (E5−21) − E1 (E9−1) L − BR Vapor pressure sensor Below 0.5 V
4.0 kPa (30 mmHg, 1.18 in.Hg)
Speed signal from com- Ignition switch ON, rotate driving Pulse generation
SPD (E6−17) − E1 (E9−1) Y − BR
bination meter wheel slowly (See page 05−572)
STA (E7−17) − E1 (E9−1) B − BR Starter signal Cranking 6 V or higher
Ignition switch ON, brake pedal is
STP (E6−19) − E1 (E9−1) BR − BR Stop lamp switch 7.5 to 14 V
depressed
Ignition switch ON, brake pedal is
STP (E6−19) − E1 (E9−1) BR − BR Stop lamp switch Below 1.5 V
released
Stop lamp switch Ignition switch ON, brake pedal is
ST1− (E6−12) − E1 (E9−1) V − BR Below 1.5 V
(opposite to stop) depressed
Stop lamp switch Ignition switch ON, brake pedal is
ST1− (E6−12) − E1 (E9−1) V − BR 7.5 to 14 V
(opposite to stop) released
Ignition switch ON, shift lever posi-
NSW (E7−16) − E1 (E9−1) B−R − BR PNP switch Below 3.0 V
tion in P or N
Ignition switch ON, except shift le-
NSW (E7−16) − E1 (E9−1) B−R − BR PNP switch 9 to 14 V
ver position in P or N
M+ (E9−3) − ME01 (E9−4) B − W−B
Throttle motor Idling Pulse generation
M− (E9−2) − ME01 (E9−4) W − W−B
FC (E5−10) − E1 (E9−1) Y − BR Fuel pump control Ignition switch ON 9 to 14 V
FC (E5−10) − E1 (E9−1) Y − BR Fuel pump control Idling 0 to 3 V
W (E5−11) − E1 (E9−1) SB − BR MIL Ignition switch ON Below 3.0 V
W (E5−11) − E1 (E9−1) SB − BR MIL Idling 9 to 14 V
ELS2 (E5−12) − E1 (E9−1) G − BR Electric load Taillight switch OFF 0 to 1.5 V
ELS2 (E5−12) − E1 (E9−1) G − BR Electric load Taillight switch ON 7.5 to 14 V
TC (E5−20) − E1 (E9−1) O − BR Terminal TC of DLC 3 Ignition switch ON 9 to 14 V
SIL (E5−18) − E1 (E9−1) R − BR Terminal SIL of DLC3 During transmission Pulse generation
TACH (E5−5) − E1 (E9−1) B − BR Engine speed Idling Pulse generation
ACIS (E7−15) − E1 (E9−1) R−Y − BR VSV for ACIS Ignition switch ON 9 to 14 V
ACM (E9−6) − E1 (E9−1) Y−G − BR VSV for ACM Ignition switch ON 9 to 14 V

ENG+ (E5−24) − Electric load (from skid

V−R Idling Pulse generation
ENG− (E5−30) control ECU)
Electric load (from skid
TRC+ (E5−25) − TRC− (E5−31) Y−G Idling Pulse generation
control ECU)

PSW (E9−10) − E1 (E9−1) R−W − BR PS pressure switch Ignition switch ON 9 to 14 V

2004 HIGHLANDER REPAIR MANUAL (RM1086U)