2004 ISUZU TF SERIES engine

6E–48 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
ECM WIRING DIAGRAM (3/7)

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–49
ECM WIRING DIAGRAM (4/7)

6E–50 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
ECM WIRING DIAGRAM (5/7)

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–51
ECM WIRING DIAGRAM (6/7)

6E–52 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
ECM WIRING DIAGRAM (7/7)

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–53
ECM CONNECTOR PIN ASSIGNMENT & OUTPUT SIGNAL
4JA1-TC ECM CONNECTOR PIN ASSIGNMENT & OUTPUT SIGNA L
View Looking Into ECM Case
Signal or Continuity Tester Position
Pin
No. B/Box
No.Pin Function Wire
ColorKey SW
OffKey SW
OnEngine
IdleEngine
2000rpmECM
Connec-
tionRange (+) (-)
1 1 ECM Gro und BLK Continuity
with
gro und---Discon-
ne ctOhm 1 GND
2 2 ECM Gro und BLK Continuity
with
gro und---Discon-
ne ctOhm 2 GND
3 3 Batte ry Powe r Supply BLU/
REDLess than
1V10-14V Connect DC V 3 GND
25 25 No Conne ctio n - - - - - - - - -
26 26 No Conne ctio n - - - - - - - - -
27 27 Engine Spee d Output
(To Ta cho Me te r)LGN - - Approx.
23Hz by
w a v e fo rm
or approx.
6.3V Approx.
67Hz by
wave form
or approx.
6.8V Co nnect AC V 27 GND
28 28 No Conne ctio n - - - - - - - - -
29 29 No Conne ctio n - - - - - - - - -
30 30 Brake Switch 1 Signal GRN Less than
1VPedal is not stepped on: Less than 1V
Pedal is stepped on: 10-14VCo nnect DC V 30 GND
31 31 Clutch Switch Signal
(MT Only )YEL Less than
1VPedal is not stepped on: 10-14V
Pedal is stepped on: Less than 1VCo nnect DC V 31 GND
32 32 No Conne ctio n - - - - - - - - -
33 33 A/C ON Signa l Re la y GRN/
YELLess than
1VA/C re que st switch is turne d on: 10-
14V
A/C request switch is turned off: Less
than 1VCo nnect DC V 33 GND
34 34 No Conne ctio n - - - - - - - - -
35 35 To Da ta Link Co nnec-
tor No. 6 & Immobi-
lize r Contro l Unit (ICU
B8)YEL--------
36 36 No Conne ctio n - - - - - - - - -
37 37 No Conne ctio n - - - - - - - - -
38 38 Throttle Po sitio n Sen-
so r (TPS) Output Sig-
na lGRN/
ORGLess than
1VLess than 1V Approx.
0.5VCo nnect DC V 38 49
39 39 Key Sw itch Input Sig-
nal Via Engine FuseWHT Less than
1V10-14V Co nnect DC V 39 GND
40 40 No Conne ctio n - - - - - - - - -

6E–54 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
41 41 A/C Compresso r
Re la yWH T/
GRNLess than
1V10-14V A/C comp. is operated:
L e s s t h a n 1 V
A/C comp. is not oper-
ated: 10 - 14VCo nnect DC V 41 GND
42 42 Che ck Engine La mp GRN/
YELLess than
1VLamp is turned on: Less than 1V
Lamp is turned off: 10-14VCo nnect DC V 42 GND
43 43 Glow La mp ORG/
BLULess than
1VLamp is turned on: Less than 1V
Lamp is turned off: 10-14VCo nnect DC V 43 GND
44 44 No Conne ctio n - - - - - - - - -
45 45 To Da ta Link Co nnec-
to r No . 6BLU Less than
1V10-14V Co nnect DC V 45 GND
46 46 No Conne ctio n - - - - - - - - -
47 47 No Conne ctio n - - - - - - - - -
48 48 No Conne ctio n - - - - - - - - -
49 49 Throttle Po sitio n Sen-
so r (TPS) Gro undBLK/
GRNIdle :
Approx.
0.4K ohm /
WOT:
Approx.
4.0K ohm---Discon-
ne ctOhm 38 49
50 50 No Conne ctio n - - - - - - - - -
51 51 No Conne ctio n - - - - - - - - -
52 52 No Conne ctio n - - - - - - - - -
53 53 No Conne ctio n - - - - - - - - -
54 54 No Conne ctio n - - - - - - - - -
55 55 No Conne ctio n - - - - - - - - -
56 56 No Conne ctio n - - - - - - - - -
57 57 Throttle Po sitio n Sen-
sor (TPS) Po wer Sup-
plyRED/
GRNLess than
1VAppro x . 5V Co nnect DC V 57 49
58 58 ECM Re lay BLU/
BLK10-14V Less than 1V Connect DC V 58 GND
59 59 No Conne ctio n - - - - - - - - -
60 60 No Conne ctio n - - - - - - - - -
61 61 No Conne ctio n - - - - - - - - -
62 62 No Conne ctio n - - - - - - - - -
63 63 ECM Power Supply Less than
1V10-14V - DC V 63 GND
64 64 No Conne ctio n - - - - - - - - -
65 65 Bra ke Switch 2 Signa l WHT/
BLKLess than
1VPedal is not stepped on: 10-14V
Pedal is stepped on: Less than 1VCo nnect DC V 65 GND
66 66 No Conne ctio n - - - - - - - - -
67 67 No Conne ctio n - - - - - - - - -
68 68 Vehicle Spe ed Se n-
so r (VSS)YEL/
GRN- Approx . 14.5Hz by wav e fo rm or
approx. 6.0V at vehicle speed 20km/hCo nnect AC V 68 GND
69 69 Idle Switch GRN/
BLKLess than
1VPedal is not stepped on: Less than 1V
Pedal is stepped on: Approx. 5VCo nnect DC V 69 GND
70 70 No Conne ctio n - - - - - - - - -
71 71 No Conne ctio n - - - - - - - - -
72 72 No Conne ctio n - - - - - - - - -
73 73 No Conne ctio n - - - - - - - - -
74 74 No Conne ctio n - - - - - - - - -Signal or Continuity Tester Position
Pin
No. B/Box
No.Pin Function Wire
ColorKey SW
OffKey SW
OnEngine
IdleEngine
2000rpmECM
Connec-
tionRange (+) (-)

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–55
75 75 No Conne ctio n - - - - - - - - -
76 76 No Conne ctio n - - - - - - - - -
77 77 No Conne ctio n - - - - - - - - -
78 78 No Conne ctio n - - - - - - - - -
79 79 No Conne ctio n - - - - - - - - -
80 80 No Conne ctio n - - - - - - - - -
81 81 No Conne ctio n - - - - - - - - -
82 82 No Conne ctio n - - - - - - - - -
83 83 Ma ss Air Flo w (MAF)
Se nso r Po wer SupplyWH T/
REDLess than
1VAppro x . 5V Co nnect DC V 83 92
84 84 Intake Air Tempera-
ture (IAT) Sensor Sig-
na lBLK/
BLULess than
1V0 deg. C: Approx. 3.6V / 20 deg. C:
Approx. 2.6V / 40 deg. C: Approx.
1.7V / 60 deg. C: 1.1V / 80 deg. C:
0.7VCo nnect DC V 84 92
85 85 No Conne ctio n - - - - - - - - -
86 86 No Conne ctio n - - - - - - - - -
87 87 Neutral Switch BLK/
WH TLess than
1VIn neutral: Less than 1V
Other than neutral: 10-14VCo nnect DC V 87 GND
88 88 Ma ss Air Flo w (MAF)
Se nso r SignalGRN/
REDLess than
1VAppro x . 1V Appro x .
1.8VApprox.
2.5VCo nnect DC V 88 92
89 89 Engine Coolant Tem-
perature (ECT) Sen-
so r S ig na lGRY Less than
1V0 deg. C: Approx. 4.4V / 20 deg. C:
Approx. 3.8V / 40 deg. C: Approx.
2.9V / 60 deg. C: 2.1V / 80 deg. C:
1.4VCo nnect DC V 89 93
90 90 CKP Se nso r Signal RED - - Appro x .
47Hz by
w a v e fo rm Approx.
134Hz by
wave form
or approx.
1.1VCo nnect AC V 90 98
91 91 CKP Senso r Output
To Pump Co ntrol Unit
(PSG) No.8PNK - - Appro x .
47Hz by
w a v e fo rm Approx.
134Hz by
wave form
or approx.
0.7VCo nnect AC V 91 GND
92 92 Ma ss Air Flo w (MAF)
Se nsor GroundBLK/
REDContinuity
with
gro und- - - Connect Ohm 92 GND
93 93 Engine Coolant Tem-
perature (ECT) Sen-
so r Gro undBLK/
PNKContinuity
with
gro und- - - Connect Ohm 93 GND
94 94 Glo w Relay BLK/
REDLess than
1VGlow system is operated: Less than
1 V
Glow system is not operated: 10 - 14VCo nnect DC V 94 GND
95 95 No Conne ctio n - - - - - - - - -
96 96 No Conne ctio n - - - - - - - - -
97 97 EGR EVRV BLK/
ORG- - Approx. 140Hz by wave
fo rm whe n EVRV is
operated----
98 98 CKP Se nsor Ground WHT Continuity
with
gro und- - - Connect Ohm 98 GND
99 99 CAN (Contro ller Are a
Ne two rk) to PSG No .1BLU--------
100 100 CAN (Contro ller Are a
Ne two rk) to PSG No .2YEL--------Signal or Continuity Tester Position
Pin
No. B/Box
No.Pin Function Wire
ColorKey SW
OffKey SW
OnEngine
IdleEngine
2000rpmECM
Connec-
tionRange (+) (-)