Toyota 4Runner: Generator Signal Circuit
DESCRIPTION
When the engine is started, the generator assembly turns on and a voltage pulse signal is generated.
This signal is used by the air conditioning amplifier assembly.
The signal expressing the amount of output from the generator assembly is one element of PTC heater control.
WIRING DIAGRAM
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PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - GENERATOR) |
(a) Disconnect the F42 amplifier connector.
(b) Disconnect the C5 generator connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F42-25 (ALT) - C5-3 (M) |
Always |
Below 1 Ω |
|
F42-25 (ALT) - Body ground |
Always |
10 kΩ or higher |
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
PTC Heater Circuit
DESCRIPTION
PTC heater relays are closed in accordance with signals from the air conditioning
amplifier assembly and power is supplied to the quick heater assembly installed
on the radiator heate ...
Other materials about Toyota 4Runner:
Installation
INSTALLATION
PROCEDURE
1. INSTALL WINDSHIELD WIPER SWITCH ASSEMBLY
(a) Attach the claw to install the windshield wiper switch assembly.
(b) Connect the 2 connectors.
2. INSTALL UPPER STEERING COLUMN COVER
(a) Attach the claw to install the upper steering ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT BRAKE PEDAL LOAD SENSING SWITCH
HINT:
Do not remove the brake pedal load sensing switch from the brake pedal
lever sub-assembly.
When there is a malfunction in the brake pedal load sensing switch, ...
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