Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION BLOCK ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly (See page ).

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F10-3 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A-11 (GND1) - Body ground	None - Body ground	Ground	Always	Below 1 Ω
A-30 (BECU) - Body ground	None - Body ground	Battery power supply	Always	11 to 14 V
A-32 (IG) - Body ground	None - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

2. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the h1 multiplex network master switch assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
h1-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
h1-11 (B) - Body ground	G - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

3. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

(a) Disconnect the I2 front power window regulator motor assembly LH connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I2-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
I2-2 (B) - Body ground	R - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

4. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

(a) Disconnect the H2 front power window regulator motor assembly RH connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H2-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
H2-2 (B) - Body ground	G - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

5. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

(a) Disconnect the K2 rear power window regulator motor assembly LH connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
K2-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
K2-2 (B) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

6. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

(a) Disconnect the J2 rear power window regulator motor assembly RH connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J2-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
J2-2 (B) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

7. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)

(a) Disconnect the S10 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
S10-12 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
S10-8 (B) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
S10-1 (IG) - Body ground	L - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)

(a) Disconnect the F79 certification ECU (smart key ECU assembly) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F79-15 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F79-1 (+B) - Body ground	V - Body ground	Battery power supply	Always	11 to 14 V
F79-16 (IG) - Body ground	W - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

9. CHECK POWER MANAGEMENT CONTROL ECU (w/ Smart Key System)

(a) Disconnect the F80 power management control ECU connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F80-6 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F80-5 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F80-1 (AM22) - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V
F80-2 (AM21) - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V

10. CHECK ID CODE BOX (IMMOBILIZER CODE ECU) (w/ Smart Key System)

(a) Disconnect the F72 ID code box (immobilizer code ECU) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F72-8 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F72-1 (+B) - Body ground	V - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

11. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) (w/ Smart Key System)

(a) Disconnect the F68 steering lock ECU (steering lock actuator assembly) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F68-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F68-6 (IG2) - Body ground	W - Body ground	IG power supply	Ignition switch ON	11 to 14 V
F68-7 (B) - Body ground	GR - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

12. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the F42 air conditioning amplifier assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F42-14 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F42-1 (IG+) - Body ground	L - Body ground	IG power supply	Ignition switch ON	11 to 14 V
F42-21 (B) - Body ground	V - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

13. CHECK HEATER CONTROL ASSEMBLY

(a) Disconnect the F29 heater control assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F29-11 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F29-4 (IG+) - Body ground	L - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

14. CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

(a) Disconnect the V2 multiplex network door ECU (back door P/W) connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
V2-6 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
V2-7 (BECU) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
V2-8 (SIG) - Body ground	G - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

15. CHECK BACK DOOR POWER WINDOW REGULATOR SUB-ASSEMBLY

(a) Disconnect the W9 back door power window regulator sub-assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
W9-1 (GND) - Body ground	LG - Body ground	Ground	Always	Below 1 Ω
W9-2 (B) - Body ground	GR - Body ground	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

16. CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the F14 combination meter assembly connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F14-20 (E1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
F14-15 (B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
F14-17 (IG+) - Body ground	R - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

17. CHECK DRIVE MONITOR SWITCH (w/ CRAWL Control)

(a) Disconnect the U1 drive monitor switch connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
U1-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
U1-6 (+B) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
U1-12 (IG) - Body ground	G - Body ground	IG power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

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