Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Window Defogger System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the F42 air conditioning amplifier connector.

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

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

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

(d) Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F42-38 (RDEF) - F42-14 (GND)	P - W-B	Rear defogger signal	Ignition switch ON, rear window defogger switch off	11 to 14 V
F42-38 (RDEF) - F42-14 (GND)	P - W-B	Rear defogger signal	Ignition switch ON, rear window defogger switch on	Below 1 V

If the result is not as specified, there may be a malfunction in the air conditioning amplifier.

2. CHECK HEATER CONTROL ASSEMBLY

(a) Disconnect the F29 heater control 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
F29-4 (IG+) - F29-11 (GND)	L - W-B	Ignition switch power supply	Ignition switch ON	11 to 14 V
F29-4 (IG+) - F29-11 (GND)	L - W-B	Ignition switch power supply	Ignition switch off	Below 1 V
F29-11 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Data List / Active Test

DATA LIST / ACTIVE TEST 1. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrus ...

Other materials about Toyota 4Runner:

Adjustment
ADJUSTMENT CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. Centering bolts are used to mount the door hinge to the vehicle body and door. The door cannot b ...

Removal
REMOVAL PROCEDURE 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. NOTICE: When disconnecting the cable, some systems ne ...