- Đọc DTC (Mã chuẩn đoán hư hỏng)
4. Thực hành chẩn đoán hệ thống
4.8. Kiểm tra điện áp nguồn cung cấp cho ECU
Kiểm tra điện áp ắc quy là 11 đến 13V cơng tắc ở vị trí ON B1 - E1 = 11 - 14V B - E1 = 11 - 14V BATT - E1 = 11 - 14V W - E2 = 11 - 14V T1 - E2 = 10 - 14V ISC - E2 =12V A/C - E2 = 12V
Bảng chức năng các cực của ECM
Pin Description Connected to Remark
(1) (2) (3) (4)
1 Power ground Chassis
ground 2 Battery voltage after ignition key supply Ignition key
3 Power ground Chassis
ground
4 Battery voltage after main relay supply Main relay
5 ECM ground Chassis ground
6 Direct battery voltage supply Battery (+) 7 Ignition coil for CYL.1 (without
immobilizer) or Ignition coil for CYL.1 (without immobilizer)
Ignition coil (CYL.1 or 4) 8 Ignition shield ground Ignition coil (CYL.1,2, 3,4)
9 MAFS & IATS ground MAFS & IATS 10 MAFS & IATS input MAFS & IATS
173
11 Throttle position sensor signal input Electronic Throttle
System module 12 Accelerator position sensor2 (ÁPS2)
ground
ÁPS
13 Accelerator position sensor2 (ÁPS2) signal input
ÁPS
14 Engine coolant temperature (ECTS) ground
ECTS
15 ECTS signal input ECTS
16 HO2S (Bank1/ Sensor1) ground HO2S (Bank1/ Sensor1) 17 HO2S (Bank1/ Sensor1) signal input HO2S (Bank1/
Sensor1) 18 Intake air temperature sensor
(IATS) signal input
Intake air temperature sensor (IATS) 19
Accelerator position sensor1 (ÁPS1) ground
ÁPS
20
Accelerator position sensor1 (ÁPS1) signal input
ÁPS
21 Knock sensor ground Knock sensor 22 Knock sensor signal input Knock sensor 23 TPS supply (+5V) Electronic
Throttle System module 24 Accelerator position sensor 1
(ÁPS1) supply (+5V)
ÁPS
25 Injector for CLY.1 Injector CYL.1) 26 Injector for CLY.3 Injector(CYL.3) 27 Injector for CLY.4 Injector CYL.4) 28 Injector for CLY.2 Injector CYL.2)
29
Ignition coil for CYL.3 (without immobilizer) or Ignition coil for CYL.2 (without immobilizer)
Ignition coil (CYL.3 or2)
174
30 Power steering sensor ground Power steering sensor
31 - -
32 - -
33 Fuel tark pressure sensor signal input Fuel tatk pressure sensor 34 Fuel tark pressure sensor ground Fuel tatk
pressure sensor 35 A/C pressure transducer signal input A/C pressure
transducer 36 Fuel levềl gauge signal input Fuel levềl
gauge 37 CVVT oil temperature sensor
(OTS) ground
CVVT oil temperature sensor (OTS) 38 HO2S (Bank1/Sensor2) signal input HO2S
(Bank1/Sensor2 )
39 HO2S (Bank1/Sensor2) ground HO2S (Bank1/Sensor2 )
40 CVVT oil temperature sensor (OTS) signal input
CVVT oil temperature sensor (OTS) 41 Throttle position sensor signal input Electronic
Throttle System module 42 Throttle position sensor ground Electronic
Throttle System module 43 - - 44 - - 45 - - 46 - -
47 Accelerator position sensor1 (ÁPS2) supply (+5V)
175
48 Sensor supply (+5V) Power
steering sensor, A/C pressure
transducer 51 Ignition coil for CYL.4 (without
immobilizer) or Ignition coil for CYL.1 (without immobilizer)
Ignition coil (CYL.4 or1) 52 Power steering sensor signal input Power steering
sensor 53 Wheel speed signal from ABS
unit or VDC unit
ABS unit or VDC
unit
54 - -
55 Wheel speed sensor (+) inductivề signal Wheel speed sensor without ABS and VDC system 56 Wheel speed sensor (-)
inductivề signal Wheel speed sensor without ABS and VDC system 57 A/C pressure transducer ground A/C pressure
transducer 58 Cruise control switch signal Steering 59 Cruise control switch ground Steering 60 A/C request switch signal input A/C
request switch 61 Alternator FR signal input Alternator
62 A/C compressor switch signal input A/C compressor 63 Fuel consumption signal Cluster
64 Main relay control Main relay
65 PWM fan control Fan control unit 66 CVVT oil control valvề (OCV)
control
CVVT oil control valvề (OCV)
176
67 PCSV control PCSV
68
69 Immobilizer lâmp output Immobilizer lâmp
70 Electric fuel
pump relay 74 Brake test switch signal input Brake test
switch 75 Immobilizer data line Immobilizer 76 Diagnostic data line (Kline) Data Link
Connector (DLC)
77 CAN [High] ABS Control
module
78 CAN [Low] ABS Control
module 79 Câmshaft position sensor
(CMPS) ground
CMPS
80 Câmshaft position sensor (CMPS) signal input
CMPS
81 Crankshaft position sensor (CKPS) ground
CKPS
82 Crankshaft position sensor (CKPS) signal input
CKPS
83 Brake light switch signal input Brake light switch
84 Clutch switch signal input Clutch switch 85
Throttle position PWM output
VDC control module 86 Engine speed signal input Táchometer 87 A/C compressor relay control output A/Ccompressor
177
88 Cooling fan relay - High control output Cooling fan relay
89 Cruise lâmp control Cluster
90 Cruise set lâmp control Cluster 91 Canister close valvề control Canister close
valvề 92 Malfunction indicator lâmp (MIL)
output
Malfunction indicator lâmp (MIL)
93 HO2S heater (Bank1/Sensor1) HO2S heater (Bank1/Sensor1 )
94 HO2S heater (Bank1/Sensor2) HO2S heater (Bank1/Sensor2 )
74 Brake test switch signal input Brake test switch
75 Immobilizer data line Immobilizer 76 Diagnostic data line (Kline) Data Link
Connector (DLC)
77 CAN [High] ABS
Control module
78 CAN [Low] ABS
Control module 79 Câmshaft position sensor
(CMPS) ground
CMPS
80 Câmshaft position sensor (CMPS) signal input
CMPS
81 Crankshaft position sensor (CKPS) ground
CKPS
82 Crankshaft position sensor (CKPS) signal input
CKPS
83 Brake light switch signal input Brake light switch
178
84 Clutch switch signal input Clutch switch 85 Throttle position PWM output VDC
control module 86 Engine speed signal input Táchometer 87 A/C compressor relay control output A/Ccompressor
relay
88 Cooling fan relay - High control output Cooling fan relay
89 Cruise lâmp control Cluster
90 Cruise set lâmp control Cluster 91 Canister close valvề control Canister close
valvề 92 Malfunction indicator lâmp (MIL)
output
Malfunction indicator lâmp (MIL)
93 HO2S heater (Bank1/Sensor1) HO2S heater (Bank1/Sensor1 )
94 HO2S heater (Bank1/Sensor2) HO2S heater (Bank
1/Sensor2) 74 Brake test switch signal input Brake test
switch 75 Immobilizer data line Immobilizer 76 Diagnostic data line (Kline) Data Link
Connector (DLC)
77 CAN [High] ABS Control
module
78 CAN [Low] ABS Control
module 79 Câmshaft position sensor
(CMPS) ground
179