Scan tool does not communicate with CAN device (models with radar sensor and stereo camera) (4JJ3 with DPD)

1. General circuit diagram

2. ECM outline

3. ECM pin layout

31 pin (A connector)

PIN No.	Pin function
1	ECM main relay control
2	ECM main relay control
3	Glow plug control signal from ECM
4	Glow relay control
5	A/C compressor relay control
6	Starter cut relay control
7	-
8	Stoplight switch 2 signal
9	Cruise control main switch signal
10	Clutch switch 1 signal
11	-
12	-
13	-
14	Neutral switch signal (M/T)
	Inhibitor switch signal (A/T)
15	-
16	-
17	-
18	MIL control
19	Stoplight switch 1 signal
20	-
21	Thermo relay signal (manual A/C)
	Refrigerant pressure switch signal (auto A/C)
22	Vehicle speed signal
23	Clutch switch 2 signal
24	Accelerator pedal position sensor 1 low reference
25	Accelerator pedal position sensor 2 low reference
26	ECM case ground
27	Ignition voltage (start)
28	Glow plug diagnosis signal to ECM
29	-
30	Accelerator pedal position sensor 1, 5 volts reference
31	Accelerator pedal position sensor 2, 5 volts reference

35 pin (B connector)

PIN No.	Pin function
1	Ignition voltage (ON)
2	Battery voltage
3	Battery voltage
4	Battery voltage
5	Battery voltage
6	Battery voltage
7	-
8	Fuel filter switch signal
9	-
10	Ground
11	-
12	-
13	Battery voltage
14	ISO CAN low 1 signal
15	-
16	ISO CAN high 1 signal
17	IAT sensor, Cruise control switch, Clutch pedal stroke sensor and Fuel temperature sensor low reference
18	-
19	Charge air cooler temperature sensor 1 low reference
20	-
21	-
22	-
23	-
24	MAF sensor low reference
25	-
26	-
27	ECM signal ground
28	Clutch pedal stroke sensor 5 volts reference
29	-
30	-
31	-
32	Charge air cooler temperature sensor 1 signal
33	IAT sensor signal
34	Charge air cooler temperature sensor 2 signal
35	ECM signal ground

33 pin (C connector)

PIN No.	Pin function
1	ECM power ground
2	ECM power ground
3	ECM power ground
4	ECM power ground
5	ECM power ground
6	ECM power ground
7	ISO CAN low 2 signal
8	-
9	ISO CAN high 2 signal
10	-
11	-
12	-
13	-
14	-
15	-
16	-
17	Accelerator pedal position sensor 1 shield ground
18	Accelerator pedal position sensor 2 shield ground
19	MAF sensor and Clutch pedal stroke sensor shield ground
20	-
21	-
22	Accelerator pedal position sensor 2 signal
23	-
24	-
25	-
26	-
27	Accelerator pedal position sensor 1 signal
28	MAF sensor signal
29	Clutch pedal stroke sensor signal
30	Cruise control switch signal
31	Fuel temperature sensor signal
32	-
33	-

32 pin (D connector)

PIN No.	Pin function
1	Oil level sensor (oil level) signal
2	Heated oxygen sensor heater low side
3	Heated oxygen sensor heater high side
4	-
5	-
6	-
7	-
8	-
9	-
10	-
11	-
12	Swirl control solenoid valve control
13	EGR cooler bypass control solenoid valve control
14	-
15	-
16	-
17	-
18	CMP sensor signal
19	-
20	-
21	Boost pressure sensor signal
22	-
23	EGR gas pressure sensor signal
24	EGR gas temperature sensor 2 signal
25	-
26	Oil level sensor (oil temperature) signal
27	Exhaust differential pressure sensor signal
28	CKP sensor signal
29	EGR gas temperature sensor 1 signal
30	Exhaust gas temperature sensor 2 signal
31	Engine coolant temperature sensor signal
32	Exhaust gas temperature sensor 1 signal

35 pin (E connector)

PIN No.	Pin function
1	Intake throttle motor 1
2	Intake throttle motor 2
3	FRP reduction valve low side
4	FRP reduction valve high side
5	PCV low side
6	PCV high side
7	Cylinder No. 1 injector solenoid control
8	-
9	-
10	-
11	-
12	-
13	-
14	-
15	-
16	CMP sensor shield ground
17	FRP sensor shield ground
18	CKP sensor shield ground
19	-
20	-
21	-
22	Heated oxygen sensor pump current (IP)
23	Heated oxygen sensor low reference (VM)
24	-
25	Intake throttle position sensor signal
26	CKP sensor low reference
27	CMP sensor, FRP sensor, Exhaust gas temperature sensor 2, and Charge air cooler temperature sensor 2 low reference
28	-
29	FRP sensor signal
30	-
31	Heated oxygen sensor reference voltage (UN)
32	-
33	-
34	-
35	Boost pressure sensor 5 volts reference

34 pin (F connector)

PIN No.	Pin function
1	Cylinder No. 3 injector solenoid control
2	Cylinder No. 4 injector solenoid control
3	Cylinder No. 2 injector solenoid control
4	Cylinder No. 1 injector charge voltage
5	Cylinder No. 4 injector charge voltage
6	Cylinder No. 3 injector charge voltage
7	Cylinder No. 2 injector charge voltage
8	EGR gas pressure sensor shield ground
9	-
10	-
11	-
12	-
13	-
14	-
15	-
16	-
17	-
18	Intake throttle position sensor, engine coolant temperature sensor, and EGR gas temperature sensor 2 low reference
19	Exhaust gas temperature sensor 1, EGR gas pressure sensor, and Exhaust differential pressure sensor low reference
20	Boost pressure sensor and EGR gas temperature sensor 1 low reference
21	-
22	Oil level sensor low reference
23	-
24	-
25	-
26	-
27	-
28	EGR gas pressure sensor and Exhaust differential pressure sensor 5 volts reference
29	Intake throttle position sensor 5 volts reference
30	CMP sensor and FRP sensor 5 volts reference
31	CKP sensor 5 volts reference
32	-
33	-
34	-