| Last Modified: 11-27-2007 | 1.6 U | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000000PDH05FX |
| Title: 3UR-FE ENGINE CONTROL: SFI SYSTEM: TERMINALS OF ECM (2008 LX570) | ||
TERMINALS OF ECM
1. CHECK ECM
(a) Measure the voltage according to the value(s) in the table below.
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
|
Terminal No. (Symbols) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
A38-1 (BATT) - C53-81 (E1) |
L - W-B |
Battery (for measuring battery voltage and for ECM memory) |
Always |
11 to 14 V |
|
C53-41 (+BM) - C53-81 (E1) |
P - W-B |
Power source of throttle actuator |
Always |
11 to 14 V |
|
A38-28 (IGSW) - C53-81 (E1) |
B - W-B |
Engine switch |
Engine switch on (IG) |
11 to 14 V |
|
A38-3 (+B) - C53-81 (E1) |
B - W-B |
Power source of ECM |
Engine switch on (IG) |
11 to 14 V |
|
A38-2 (+B2) - C53-81 (E1) |
B - W-B |
Power source of ECM |
Engine switch on (IG) |
11 to 14 V |
|
C53-58 (OC1+) - C53-57 (OC1-) |
B - B-L |
Camshaft oil control valve (OCV) (for Intake Side of Bank 1) |
Idling |
Pulse generation (See waveform 1) |
|
C53-52 (OC2+) - C53-51 (OC2-) |
L-B - R-B |
Camshaft oil control valve (OCV) (for Intake Side of Bank 2) |
Idling |
Pulse generation (See waveform 1) |
|
C53-56 (OE1+) - C53-55 (OE1-) |
L-W - L-B |
Camshaft oil control valve (OCV) (for Exhaust Side of Bank 1) |
Idling |
Pulse generation (See waveform 1) |
|
C53-50 (OE2+) - C53-49 (OE2-) |
L-R - L-B |
Camshaft oil control valve (OCV) (for Exhaust Side of Bank 2) |
Idling |
Pulse generation (See waveform 1) |
|
A38-34 (MREL) - C53-81 (E1) |
W-R - W-B |
EFI relay |
Engine switch on (IG) |
11 to 14 V |
|
C53-74 (VG) - C53-75 (E2G) |
L-Y - G-W |
Mass air flow meter |
Idling, Shift lever in P or N, A/C switch off |
0.5 to 3.0 V |
|
C53-73 (THA) - C53-97 (ETHW) |
Y-B - BR |
Intake air temperature sensor |
Idling, Intake air temperature 20°C (68°F) |
0.5 to 3.4 V |
|
C53-76 (THW) - C53-98 (ETHA) |
G-B - BR |
Engine coolant temperature sensor |
Idling, Engine coolant temperature 80°C (176°F) |
0.2 to 1.0 V |
|
C53-80 (VCTA) - C53-79 (ETA) |
Y - L |
Power source of throttle position sensor (specific voltage) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
C53-78 (VTA1) - C53-79 (ETA) |
R-Y - L |
Throttle position sensor (for engine control) |
Engine switch on (IG), Throttle valve fully closed |
0.5 to 1.2 V |
|
Engine switch on (IG), Throttle valve fully open |
3.2 to 4.8 V |
|||
|
C53-77 (VTA2) - C53-79 (ETA) |
Y-B - L |
Throttle position sensor (for sensor malfunction detection) |
Engine switch on (IG), Throttle valve fully closed |
2.1 to 3.1 V |
|
Engine switch on (IG), Throttle valve fully open |
4.5 to 5.5 V |
|||
|
A38-55 (VPA) - A38-58 (EPA) |
R - W-L |
Accelerator pedal position sensor (for engine control) |
Engine switch on (IG), Accelerator pedal released |
0.5 to 1.1 V |
|
Engine switch on (IG), Accelerator pedal fully depressed |
2.6 to 4.5 V |
|||
|
A38-56 (VPA2) - A38-60 (EPA2) |
GR-G - BR |
Accelerator pedal position sensor (for sensor malfunctioning detection) |
Engine switch on (IG), Accelerator pedal released |
1.2 to 2.0 V |
|
Engine switch on (IG), Accelerator pedal fully depressed |
3.4 to 5.3 V |
|||
|
A38-57 (VCPA) - A38-58 (EPA) |
L-W - W-L |
Power source of accelerator pedal position sensor (for VPA) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
A38-59 (VCP2) - A38-60 (EPA2) |
V - BR |
Power source of accelerator pedal position sensor (for VPA2) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
C53-22 (HA1A) - C53-23 (E04) |
L - W-B |
A/F sensor heater |
Idling |
Below 3.0 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
C53-20 (HA2A) - C53-21 (E05) |
G - W-B |
A/F sensor heater |
Idling |
Below 3.0 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
C53-126 (A1A+) - C53-81 (E1) |
G - W-B |
A/F sensor |
Engine switch on (IG) |
3.3 V* |
|
C53-125 (A1A-) - C53-81 (E1) |
R - W-B |
A/F sensor |
Engine switch on (IG) |
2.9 V* |
|
C53-103 (A2A+) - C53-81 (E1) |
P - W-B |
A/F sensor |
Engine switch on (IG) |
3.3 V* |
|
C53-102 (A2A-) - C53-81 (E1) |
L - W-B |
A/F sensor |
Engine switch on (IG) |
2.9 V* |
|
C53-45 (HT1B) - C53-46 (E03) |
G-B - W-B |
Heated oxygen sensor heater |
Idling |
Below 3.0 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
C53-44 (HT2B) - C53-46 (E03) |
B - W-B |
Heated oxygen sensor heater |
Idling |
Below 3.0 V |
|
Engine switch on (IG) |
11 to 14 V |
|||
|
C53-114 (OX1B) - C53-115 (EX1B) |
G - L |
Heated oxygen sensor |
Engine speed maintained at 2500 rpm for 2 minutes after warming up sensor |
Pulse generation (See waveform 2) |
|
C53-112 (OX2B) - C53-113 (EX2B) |
R - W |
Heated oxygen sensor |
Engine speed maintained at 2500 rpm for 2 minutes after warming up sensor |
Pulse generation (See waveform 2) |
|
C53-86 (#10) - C53-43 (E01) |
R-L - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-109 (#20) - C53-43 (E01) |
L - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-85 (#30) - C53-43 (E01) |
R-B - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-108 (#40) - C53-43 (E01) |
Y - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-84 (#50) - C53-43 (E01) |
G - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-107 (#60) - C53-43 (E01) |
R - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-83 (#70) - C53-43 (E01) |
W - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-106 (#80) - C53-43 (E01) |
R-B - W-B |
Fuel injector |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 3) |
|||
|
C53-94 (KNK1) - C53-93 (EKNK) |
R - G |
Knock sensor |
Engine speed maintained at 4000 rpm after warming up engine |
Pulse generation (See waveform 4) |
|
C53-117 (KNK2) - C53-116 (EKN2) |
W - B |
Knock sensor |
Engine speed maintained at 4000 rpm after warming up engine |
Pulse generation (See waveform 4) |
|
C53-96 (KNK3) - C53-95 (EKN3) |
W - B |
Knock sensor |
Engine speed maintained at 4000 rpm after warming up engine |
Pulse generation (See waveform 4) |
|
C53-119 (KNK4) - C53-118 (EKN4) |
R - G |
Knock sensor |
Engine speed maintained at 4000 rpm after warming up engine |
Pulse generation (See waveform 4) |
|
C53-92 (VV1+) - C53-91 (VV1-) |
R - Y |
Variable valve timing (VVT) sensor (for Intake Side of Bank 1) |
Idling |
Pulse generation (See waveform 5) |
|
C53-87 (VV2+) - C53-88 (VV2-) |
R - Y |
Variable valve timing (VVT) sensor (for Intake Side for Bank 2) |
Idling |
Pulse generation (See waveform 5) |
|
C53-69 (EV1+) - C53-68 (EV1-) |
R-L - Y |
Variable valve timing (VVT) sensor (for Exhaust Side of Bank 1) |
Idling |
Pulse generation (See waveform 16) |
|
C53-64 (EV2+) - C53-65 (EV2-) |
R-L - Y |
Variable valve timing (VVT) sensor (for Exhaust Side of Bank 2) |
Idling |
Pulse generation (See waveform 16) |
|
C53-110 (NE+) - C53-111 (NE-) |
W - G-W |
Crankshaft position sensor |
Idling |
Pulse generation (See waveform 5) |
|
C53-40 (IGT1) - C53-81 (E1) |
B-Y - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-33 (IGT2) - C53-81 (E1) |
L-B - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-37 (IGT3) - C53-81 (E1) |
B - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-34 (IGT4) - C53-81 (E1) |
L-B - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-35 (IGT5) - C53-81 (E1) |
G-R - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-36 (IGT6) - C53-81 (E1) |
G - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-38 (IGT7) - C53-81 (E1) |
G-W - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-39 (IGT8) - C53-81 (E1) |
G-B - W-B |
Ignition coil (ignition signal) |
Idling |
Pulse generation (See waveform 6) |
|
C53-104 (IGF1) - C53-81 (E1) |
G-B - W-B |
Ignition coil (ignition confirmation signal) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
Idling |
Pulse generation (See waveform 6) |
|||
|
C53-105 (IGF2) - C53-81 (E1) |
R - W-B |
Ignition coil (ignition confirmation signal) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
Idling |
Pulse generation (See waveform 6) |
|||
|
C53-63 (PRG) - C53-81 (E1) |
L-B - W-B |
Purge VSV |
Engine switch on (IG) |
11 to 14 V |
|
Idling |
Pulse generation (See waveform 7) |
|||
|
A38-13 (SPD) - C53-81 (E1) |
V-R - W-B |
Speed signal from combination meter |
Driving at 20 km/h (12 mph) |
Pulse generation (See waveform 8) |
|
A38-46 (STA) - C53-81 (E1) |
R-B - W-B |
Starter signal |
Cranking |
5.5 V or more |
|
C53-120 (NSW) - C53-81 (E1) |
L - W-B |
Park/neutral position switch |
Engine switch on (IG), Shift lever in other than P and N |
11 to 14 V |
|
Engine switch on (IG), Shift lever in P or N |
Below 3.0 V |
|||
|
A38-36 (STP) - C53-81 (E1) |
R - W-B |
Stop light switch |
Brake pedal depressed |
7.5 to 14 V |
|
Brake pedal released |
Below 1.5 V |
|||
|
A38-35 (ST1-) - C53-81 (E1) |
R-W - W-B |
Stop light switch (opposite to STP terminal) |
Engine switch on (IG), Brake pedal depressed |
Below 1.5 V |
|
Engine switch on (IG), Brake pedal released |
7.5 to 14 V |
|||
|
C53-19 (M+) - C53-82 (ME01) |
R - W-B |
Throttle actuator |
Idling with warm engine |
Pulse generation (See waveform 9) |
|
C53-18 (M-) - C53-82 (ME01) |
G - W-B |
Throttle actuator |
Idling with warm engine |
Pulse generation (See waveform 10) |
|
A38-48 (FC) - C53-81 (E1) |
L-R - W-B |
Fuel pump control |
Engine switch on (IG) |
11 to 14 V |
|
A38-52 (FPC) - C53-81 (E1) |
W - W-B |
Fuel pump control |
Engine switch on (IG) |
Below 1.5 V |
|
A38-24 (W) - C53-81 (E1) |
R-Y - W-B |
MIL |
Engine switch on (IG) |
Below 3.0 V |
|
Idling |
11 to 14 V |
|||
|
A38-16 (TC) - C53-81 (E1) |
V-W - W-B |
Terminal TC of DLC3 |
Engine switch on (IG) |
11 to 14 V |
|
A38-15 (TACH) - C53-81 (E1) |
W-G - W-B |
Engine speed |
Idling |
Pulse generation (See waveform 11) |
|
A38-30 (VPMP) - C53-81 (E1) |
B-L - W-B |
Vent valve (built into canister pump module) |
Engine switch on (IG) |
11 to 14 V |
|
A38-49 (MPMP) - C53-81 (E1) |
G-O - W-B |
Leak detection pump (built into canister pump module) |
Leak detection pump OFF |
Below 3.0 V |
|
Leak detection pump ON |
11 to 14 V |
|||
|
C53-67 (VCV1) - C53-97 (ETHW) |
L - BR |
Power source for sensor (specific voltage) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
C53-66 (VCV2) - C53-97 (ETHW) |
L - BR |
Power source for sensor (specific voltage) |
Engine switch on (IG) |
4.5 to 5.5 V |
|
C53-121 (PPMP) - C53-97 (ETHW) |
P - BR |
Canister pressure sensor (built into canister pump module) |
Engine switch on (IG) |
3.3 to 4.0 V |
|
C53-32 (ALT) - C53-81 (E1) |
R - W-B |
Generator |
Engine switch on (IG) |
11 to 14 V |
|
A38-10 (CANH) - C53-81 (E1) |
P - W-B |
CAN communication line |
Engine switch on (IG) |
Pulse generation (See waveform 12) |
|
A38-11 (CANL) - C53-81 (E1) |
B - W-B |
CAN communication line |
Engine switch on (IG) |
Pulse generation (See waveform 13) |
|
C53-62 (ACIS) - C53-81 (E1) |
L-Y - W-B |
VSV for ACIS (Acoustic Control Induction System) operation signal |
Engine switch on (IG) |
11 to 14 V |
|
C53-28 (AIRV) - C53-81 (E1) |
BR - W-B |
Air switching valve for secondary air injection system |
Engine switch on (IG) |
11 to 14 V |
|
C53-54 (AIRP) - C53-81 (E1) |
P - W-B |
Air pump control |
Engine switch on (IG) |
11 to 14 V |
|
C53-30 (AIDI) - C53-81 (E1) |
G - W-B |
Diagnostic information signal for air injection system |
Air injection system operates |
Pulse generation (See waveform 15) |
|
A38-54 (AIP) - C53-98 (ETHA) |
P-L - BR |
Secondary air injection system pressure signal |
Engine switch on (IG) |
3.0 to 3.6 V |
|
A38-43 (ARV2) - C53-81 (E1) |
R-L - W-B |
Air switching valve for secondary air injection system |
Engine switch on (IG) |
11 to 14 V |
|
C53-53 (ARP2) - C53-81 (E1) |
P-L - W-B |
Air pump control |
Engine switch on (IG) |
11 to 14 V |
|
C53-29 (AID2) - C53-81 (E1) |
G-Y - W-B |
Diagnostic information signal for air injection system |
Air injection system operates |
Pulse generation (See waveform 15) |
|
A38-53 (AIP2) - C53-97 (ETHW) |
LG-B - BR |
Secondary air injection system pressure signal |
Engine switch on (IG) |
3.0 to 3.6 V |
|
C53-90 (G2) - C53- 89 (G2-) |
G - Y |
Camshaft position sensor |
Idling |
Pulse generation (See waveform 14) |
|
A38-18 (DI) - C53-81 (E1) |
G-Y - W-B |
Fuel pump control |
Engine switch on (IG) |
0 to 3.0 V |
|
A38-14 (STSW) - C53-81 (E1) |
R - W-B |
Starter switch |
Shift lever in P or N, Cranking |
6.0 V or more |
|
A38-41 (ACCR) - C53-81 (E1) |
L-Y - W-B |
ACC relay control signal |
Engine switch on (IG) → Cranking |
11 to 14 V → Below 1 V |
|
C53-16 (STAR) - C53-81 (E1) |
L - W-B |
Starter relay control |
Engine switch on (IG) |
Below 1.5 V |
|
Cranking |
5.5 V or higher |
|||
|
C53-72 (PSP) - C53-81 (E1) |
G - W-B |
Power steering oil pressure sensor |
Engine switch on (IG) |
0.5 to 4.5 V |
HINT:
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
|
(b) WAVEFORM 1:
|
|
(c) WAVEFORM 2:
HINT:
In the Data List, item O2S B1 S2 or O2S B2 S2 shows the ECM input values from the heated oxygen sensor. |
|
(d) WAVEFORM 3:
HINT:
The wavelength becomes shorter as the engine speed increases. |
|
(e) WAVEFORM 4:
HINT:
|
|
(f) WAVEFORM 5:
HINT:
The wavelength becomes shorter as engine speed increases. |
|
(g) WAVEFORM 6:
HINT:
The wavelength becomes shorter as engine speed increases. |
|
(h) WAVEFORM 7:
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more. |
|
(i) WAVEFORM 8:
HINT:
The wavelength becomes shorter as the vehicle speed increases. |
|
(j) WAVEFORM 9:
HINT:
The duty ratio varies depending on the throttle actuator operation. |
|
(k) WAVEFORM 10:
HINT:
The duty ratio varies depending on the throttle actuator operation. |
|
(l) WAVEFORM 11:
HINT:
The wavelength becomes shorter as the engine speed increases. |
|
(m) WAVEFORM 12:
HINT:
The waveform varies depending on the CAN communication signal. |
|
(n) WAVEFORM 13:
HINT:
The waveform varies depending on the CAN communication signal. |
|
(o) WAVEFORM 14:
HINT:
The wavelength becomes shorter as the engine speed increases. |
|
(p) WAVEFORM 15:
HINT:
The wavelength changes when the air injection control driver detects malfunctions in the air injection system
|
|
(q) WAVEFORM 16:
HINT:
The wavelength becomes shorter as engine speed increases. |
|
|