Toyota 4Runner: 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.
(c) Reconnect the F42 air conditioning amplifier connector.
(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:
Transmission Fluid Temperature Sensor "B" Circuit Low Input (P2742,P2743)
DESCRIPTION
The Automatic Transmission Fluid (ATF) temperature sensor is on the transmission,
just in front of the oil cooler inlet pipeline.
If the ECM detects an abnormally high ATF temperature near this sensor, it illuminates
the warning light.
HI ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE NO. 1 HEATER TO REGISTER DUCT
(a) Remove the 4 screws and No. 1 heater to register duct.
2. REMOVE NO. 2 HEATER TO REGISTER DUCT
(a) Remove the 4 screws and No ...
0.0137