TOYOTA HIGHLANDER 2001 Service Repair Manual

C52361
TC
CGD3
DLC3
I37937
TCD3
DLC3
Wire Harness View
E5
ECM
TC
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-869
1059 Author
: Date
:
INSPECTION PROCEDURE
1 INSPECT DLC3 TERMINAL VOLTAGE(DLC3 TERMINAL VOLTAGE)
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester ConnectionSpecified Condition
D3-13 (TC) - D3-4 (CG)10 to 14 V
NG Go to step 4
OK
2 CHECK HARNESS AND CONNECTOR(ECM - DLC3)
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
E5-20 (TC) - D3-13 (TC)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
D3-13 (TC) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

G26436
Wire Harness View
E5
S27
ENG+
ENG-
ENG- ENG+
Skid Control ECU
(harness side connector)
ECM
C52361
TC
CGD3
DLC3
05-870
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1060 Author
: Date
:
3 CHECK HARNESS AND CONNECTOR(ECM - SKID CONTROL ECU)
(a) Disconnect the skid control ECU connector and the ECM
connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
E5-24 (ENG+) - S27-9 (ENG+)Below 1 W
E5-30 (ENG-) - S27-23 (ENG-)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-9 (ENG+) - Body ground10 kW or higher
S27-23 (ENG-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
4 CHECK HARNESS AND CONNECTOR(DLC 3 - BODY GROUND)
(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
D3-4 (CG) - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

I37937
TCD3
DLC3
Wire Harness View
E5
ECM
TC
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-871
1061 Author
: Date
:
5 CHECK HARNESS AND CONNECTOR(ECM - DLC3)
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
E5-20 (TC) - D3-13 (TC)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
D3-13 (TC) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

G26436
Wire Harness View
E5
S27
ENG+
ENG-
ENG- ENG+
Skid Control ECU
(harness side connector)
ECM
05-872
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1062 Author
: Date
:
6 CHECK HARNESS AND CONNECTOR(ECM - SKID CONTROL ECU)
(a) Disconnect the skid control ECU connector and the ECM
connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
E5-24 (ENG+) - S27-9 (ENG+)Below 1 W
E5-30 (ENG-) - S27-23 (ENG-)Below 1 W
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
S27-9 (ENG+) - Body ground10 kW or higher
S27-23 (ENG-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)

051ZJ-16
A53766
E7E8E9E6E5
05-32
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
222 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TERMINALS OF ECM
HINT:
Each ECM terminal's standard voltage is shown in the table below.
In the table, first follow the information under ºConditionº. Next look under ºSymbols (Terminal No.)º for the
terminals to be inspected. The standard voltage between the terminals is shown under ºSpecific Conditionº.
Use the illustration above as a reference for the ECM terminals.
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
BATT (E5-3) - E1 (E9-1)BR - BR
Battery (for measuring
battery voltage and for
ECM memory)
Always9 to 14 V
+BM (E6-6) - E1 (E9-1)W - BRPower source of throttle
motorAlways9 to 14 V
IGSW (E5-9) - E1 (E9-1)P - BRIgnition switchIgnition switch ON9 to 14 V
+B (E5-1) - E1 (E9-1)W- BRPower source of ECMIgnition switch ON9 to 14 V
+B2 (E5-2) - E1 (E9-1)W- BRPower source of ECMIgnition switch ON9 to 14 V
OC1+ (E9-16) - OC1- (E9-15)G-W - G-RCamshaft timing oil con-
trol valve (OCV)Ignition switch ONPulse generation
(see page 05-55)
MREL (E5-8) - E1 (E9-1)B - BREFI relayIgnition switch ON9 to 14 V
VC (E7-18) - E2 (E7-28)Y - BRPower source of sensor
(specific voltage)Ignition switch ON4.5 to 5.5 V
VG (E7-30) - EVG (E7-29)R - L-WMass air flow meterIdling, shift lever position P or N
position, A/C switch OFF0.5 to 3.0 V
THA (E7-20) - E2 (E7-28)L-B - BRIntake air temperature
sensorIdling, intake air temp. 20°C (68°F)0.5 to 3.4 V
THW (E7-19) - E2 (E7-28)G-B - BREngine coolant tempera-
ture sensorIdling, engine coolant temp. 80°C
(176°F)0.2 to 1.0 V
VTA1 (E7-21) - E2 (E7-28)B-W - BRThrottle position sensor
(for engine control)Ignition switch ON, accelerator ped-
al released0.3 to 1.0 V
VTA1 (E7-21) - E2 (E7-28)B-W - BRThrottle position sensor
(for engine control)Ignition switch ON, accelerator ped-
al depressed3.2 to 4.9 V
VTA2 (E7-31) - E2 (E7-28)B-R - BR
Throttle position sensor
(for sensor malfunction
detection)Ignition switch ON, accelerator ped-
al released2.1 to 3.1 V
VTA2 (E7-31) - E2 (E7-28)B-R - BR
Throttle position sensor
(for sensor malfunction
detection)Ignition switch ON, accelerator ped-
al depressed4.5 to 5.5 V
VPA (E5-22) - EPA (E5-28)B - R
Accelerator pedal position
sensor (for engine con-
trol)Ignition switch ON, accelerator ped-
al released0.5 to 1.1 V
VPA (E5-22) - EPA (E5-28)B - R
Accelerator pedal position
sensor (for engine con-
trol)Ignition switch ON, accelerator ped-
al depressed2.6 to 4.5 V
VPA2 (E5-23) - EPA2 (E5-29)W - BR
Accelerator pedal position
sensor (for sensor mal-
function detection)Ignition switch ON, accelerator ped-
al released1.2 to 2.0 V

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-33
223 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)Symbols (Terminal No.)Specified Condition Condition Terminal Description Wiring Color
VPA2 (E5-23) - EPA2 (E5-29)W - BR
Accelerator pedal position
sensor (for sensor mal-
function detection)Ignition switch ON, accelerator ped-
al depressed3.4 to 5.3 V
VCPA (E5-26) - EPA (E5-28)G - R
Power source of acceler-
ator pedal position sensor
(for VPA)
Ignition switch ON4.5 to 5.5 V
VCP2 (E5-27) - EPA2 (E5-29)L - BR
Power source of acceler-
ator pedal position sensor
(for VPA2)
Ignition switch ON4.5 to 5.5 V
HA1A (E8-5) - E04 (E8-7)B-W - W-BA/F sensor heaterIdlingBelow 3.0 V
HA1A (E8-5) - E04 (E8-7)B-W - W-BA/F sensor heaterIgnition switch ON9 to 14 V
A1A+ (E8-23) - E1 (E9-1)BR - BRA/F sensorIgnition switch ON3.0 to 3.6 V
A1A- (E8-31) - E1 (E9-1)Y - BRA/F sensorIgnition switch ON2.7 to 3.3 V
HT1B (E8-21) - E1 (E9-1)R-Y -BRHeated oxygen sensor
heaterIdlingBelow 3.0 V
HT1B (E8-21) - E1 (E9-1)R-Y -BRHeated oxygen sensor
heaterIIgnition switch ON9 to 14 V
OX1B (E8-29) - O1B (E8-2)G - BRHeated oxygen sensorMaintain engine speed at 2,500 rpm
for 2 minutes after warming upPulse generation
#1 (E7-1) - E01 (E7-7)
#2 (E7-2) - E01 (E7-7)L - W-B
Y - W-B
InjectorIIgnition s itch ON9to14V#2 (E7 2) E01 (E7 7)
#3 (E7-3) - E01 (E7-7)
#4 (E7-4) - E01 (E7-7)
Y WB
B - W-B
W - W-BInjectorIIgnition switch ON9 to 14 V
#1 (E7-1) - E01 (E7-7)
#2 (E7-2) - E01 (E7-7)
#3 (E7-3) - E01 (E7-7)
#4 (E7-4) - E01 (E7-7)L - W-B
Y - W-B
B - W-B
W - W-B
InjectorIdlingPulse generation
(see page 05-146)
KNK1 (E8-1) - FKNK1 (E8-28)B - WKnock sensorMaintain engine speed at 4,000 rpm
after warming upPulse generation
(see page 05-161)
G2+ (E9-27) - NE- (E9-24)Y - GCamshaft position sensorIdlingPulse generation
(see page 05-166)
NE+ (E9-25) - NE- (E9-24)R - GCrankshaft position sen-
sorIdlingPulse generation
(see page 05-166)
IGT1 (E7-8) - E1 (E9-1)
IGT2 (E7-9) - E1 (E9-1)
IGT3 (E7-10) - E1 (E9-1)
IGT4 (E7-11) - E1 (E9-1)R-W - BR
P - BR
Y-B - BR
L-Y - BR
Ignition coil with igniter
(ignition signal)IdlingPulse generation
(see page 05-174)
IGF1 (E7-24) - E1 (E9-1)W-R - BR
Ignition coil with igniter
(ignition confirmation sig-
nal)
IIgnition switch ON4.5 to 5.5 V
IGF1 (E7-24) - E1 (E9-1)W-R - BR
Ignition coil with igniter
(ignition confirmation sig-
nal)
IdlingPulse generation
(see page 05-174)
PRG (E7-34) - E1 (E9-1)G - BRPurge valveIgnition switch ON9 to 14 V
VPMP (E7-27) - E1 (E9-1)Y-G - BRVent valve
(Build in pump module)Ignition switch ON9 to 14 V
MPMP (E5-4) - E1 (E9-1)LG - BRVacuum pump
(Build in pump module)Vacuum pump OFF0 to 3 V
MPMP (E5-4) - E1 (E9-1)LG - BRVacuum pump
(Build in pump module)Vacuum pump ON9 to 14 V
PPMP (E5-21) - E2 (E7-28)L - BRPressure sensor
(Build in pump module)Ignition switch ON3 to 3.6 V
SPD (E6-17) - E1 (E9-1)Y - BRSpeed signal from com-
bination meterIgnition switch ON, rotate driving
wheel slowlyPulse generation
(see page 05-216)

05-34
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
224 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)Symbols (Terminal No.)Specified Condition Condition Terminal Description Wiring Color
STA (E7-17) - E1 (E9-1)B - BRStarter signalShift lever position P or N, ignition
switch START9 to 14 V
STP (E6 19) E1 (E9 1)BR BRStop lamp switchBrake pedal is depressed75to14VSTP (E6-19) - E1 (E9-1)BR - BRStop lamp switchBrake pedal is depressed7.5 to 14 V
STP (E6-19) - E1 (E9-1)BR - BRStop lamp switchBrake pedal is releasedBelow 1.5 V
ST1 (E6-12) - E1 (E9-1)V - BRStop lamp switchIgnition switch ON, Brake pedal is
depressedBelow 1.5 V
ST1 (E6-12) - E1 (E9-1)V - BRStop lamp switchIgnition switch ON, Brake pedal is
released7.5 to 14 V
NSW (E7-16) - E1 (E9-1)B-R - BRPNP switchIgnition switch ON, shift position at
P or N0 to 3.0 V
NSW (E7-16) - E1 (E9-1)B-R - BRPNP switchIgnition switch ON, shift position is
not P or N9 to 14 V
M+ (E9-3) - ME01 (E9-4)B - W-BThrottle actuatorIdlingPulse generation
M- (E9-2) - ME01 (E9-4)W - W-BThrottle actuatorIdlingPulse generation
FC (E5-10) - E1 (E9-1)Y - BRFuel pump controlIgnition switch ON9 to 14 V
W (E5-11) - E1 (E9-1)SB - BRMILIgnition switch ONBelow 3.0 V
W (E5-11) - E1 (E9-1)SB - BRMILIdling9 to 14 V
ELS2 (E5-12) - E1 (E9-1)G - BRElectric loadPower outlet OFF0 to 1.5 V
ELS2 (E5-12) - E1 (E9-1)G - BRElectric loadPower outlet ON7.5 to 14 V
TC (E5-20) - E1 (E9-1)O - BRTerminal TC of DLC3Ignition switch ON9 to 14 V
SIL (E5-18) - E1 (E9-1)R - BRTerminal SIL of DLC3During charge of gearsPulse generation
TACH (E5-5) - E1 (E9-1)B - BREngine speedIdlingPulse generation
PSW (E9-10) - E1 (E9-1)R-L - BRPS oil pressure switchIgnition switch ON9 to 14 V

05CD1-12
F45080
S27
05-784
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
974 Author
: Date
:
TERMINALS OF ECU
SKID CONTROL ECU
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
BM (S27-2) - GND (Y1-1)W-L - W-BMotor relay test inputIG switch ON, pump motor running10 to 14 V
FR+ (S27-3) - FR- (S27-17)R-Y - LGFront RH wheel speed
signal inputIG switch ON, slowly turn right front
wheelAC generation
FSW+ (S27-7) - GND1
(S27-32)G-W - W-BFSW switch inputIG switch ON, brake pedal released2 to 4 V
FL+ (S27-18) - FL- (S27-4)O - PFront LH wheel speed
signal inputIG switch ON, slowly turn left front
wheelAC generation
RR+ (S27-5) - RR- (S27-19)Y - BRRear RH wheel speed
signal inputIG switch ON, slowly turn right rear
wheelAC generation
RL+ (S27-20) - RL- (S27-6)Y-G - GRear LH wheel speed sig-
nal inputIG switch ON, slowly turn left rear
wheelAC generation
TRC+ (S27-8) - TRC-
(S27-22)G-B - Y-BECM communication out-
putIG switch ONPulse generation
ENG+ (S27-9) - ENG-
(S27-23)W-L - W-GECM communication inputIG switch ONPulse generation
NEO (S27-10) - GND1
(S27-32)V - W-BEngine rpm signal inputEngine idlingPulse generation
CANH (S27-11) - CANL
(S27-25)B - WCAN communication lineIG switch OFF54 to 67 W
D/G (S27-13) - GND1
(S27-32)GR-B - W-BDiagnosis tester commu-
nication lineIG switch ON10 to 14 V
SP1 (S27-12) - GND1
(S27-32)BR-R - W-BSpeed signal outputVehicle drives at about
20 km/h (12 mph)Pulse generation
MRF (S27-14) - R+ (S27-45)G-R - B-OFail safe motor relay out-
putIG switch ON10 to 14 V
MR (S27-15) - R+ (S27-45)LG - B-OMotor relay outputIG switch ON, pump motor running10 to 14 V
+BS (S27-31) - GND1
(S27-32)B - W-BSolenoid relay power sup-
plyAlways10 to 14 V
TS (S27-24) - GND1 (S27-32)P-B - W-BSensor check inputIG switch ON10 to 14 V
STP (S27-27) - GND1GY WBSt li ht it h i t
Stop light switch ON (Brake pedal
pushed)8 to 14 VSTP (S27 27) GND1
(S27-32)G-Y - W-BStop light switch inputStop light switch OFF (Brake pedal
released)Below 1.5 V

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-785
975 Author
: Date
:
PKB (S27-28) - GND1RW WBParking brake switch in-
IG switch ON, parking brake switch
ONBelow 1.5 VPKB (S27 28) GND1
(S27-32)R-W - W-BParking brake switch in
putIG switch ON, parking brake switch
OFF10 to 14 V
WA (S27-29) - GND1RL WBABS ilihttt
IG switch ON, ABS warning light
ON6 to 11 VWA (S27 29) GND1
(S27-32)R-L - W-BABS warning light outputIG switch ON, ABS warning light
OFFBelow 2.0 V
IG switch ON, VSC buzzer soundsBelow 1.0 e 10 to 14 V
BZ (S27-30) - GND1 (S27-32)BR-W - W-BBuzzer outputIG switch ON, VSC buzzer does not
sound10 to 14 V
VSCW (S27-36) - GND1
(S27-32)L-Y - W-BVSC warning light outputIG switch ON, VSC warning light
ONBelow 2.0 V
CSW* (S27-43) - GND1
(S27-32)L-R - W-BTRAC OFF switch inputTRAC OFF switch OFF10 to 14 V
BRL (S27-44) - GND1LG B W BBk ilihttt
IG switch ON, BRAKE warning light
ON6 to 11 VBRL (S27 44) GND1
(S27-32)LG-B - W-BBrake warning light outputIG switch ON, BRAKE warning light
OFFBelow 2.0 V
R+ (S27-45) - GND1 (S27-32)B-O - W-BPower supply for motor
relayIG switch ON10 to 14 V
IG1 (S27-46) - GND1
(S27-32)B-R - W-BIG1 power supplyIG switch ON10 to 14 V
*: 2WD only

05IOX-02
F45156
S27
F45157
GND 05-742
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
932 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TERMINALS OF ECU
SKID CONTROL ECU:
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
TRC+ (8) - TRC- (22)G-B - Y-BECM communication out-
putIgnition switch ONPulse generation
ENG+ (9) - GND1 (32)W-L - W-BECM serial communica-
tion line (+) input signalIgnition switch ON and vehicle
speed 30 km/h (19 mph) or morePulse generation
(See wave form 1)
D/G (13) - GND1 (32)GR-B - W-BDiagnosis tester commu-
nication lineIgnition switch ON10 to 14 V
ENG- (23) - GND1 (32)W-G - W-BECM serial communica-
tion line (-) input signalIgnition switch ON and engine idle
speedPulse generation
(See wave form 2)
STP (27) - GND1 (32)G-Y - W-BStop lamp switch assy in-
put signalBrake pedal depressed10 to 14 V
STP (27) - GND1 (32)G-Y - W-BStop lamp switch assy in-
put signalBrake pedal releasedBelow 1.5 V
GND1 (32) - Body groundW-B -
Body groundGroundAlwaysBelow 1 W
INIT (41) - GND1 (32)B-Y - W-BTire pressure warning re-
set switch signalIgnition switch ON and tire pressure
warning reset switch ONBelow 3 V
INIT (41) - GND1 (32)B-Y - W-BTire pressure warning re-
set switch signalIgnition switch ON and tire pressure
warning reset switch OFF10 to 14 V
Wave form 1:
Reference
ItemCondition
TerminalENG+ - GND1
Tool setting1 V / DIV, 0.5 ms / DIV
Vehicle conditionEngine idle speed