Toyota Tacoma (2015-2018) Service Manual: Back-up Power Source Circuit
DESCRIPTION
The back-up power source circuit for the air conditioning amplifier assembly is shown below. Power is supplied even when the ignition switch is off. The power is used for diagnostic trouble code memory, etc.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BATTERY) |
(a) Disconnect the A36 air conditioning amplifier assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A36-17 (B) - Body ground |
Always |
11 to 14 V |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - BODY GROUND) |
(a) Disconnect the A36 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A36-10 (GND) - Body ground |
Always |
Below 1 Ω |
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
PTC Heater Circuit
DESCRIPTION
PTC HTR 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 h ...
Other materials:
ABS Warning Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
If any of the following is detected, the ABS warning light remains on:
The skid control ECU (brake actuator assembly) connectors are disconnected
from the ...
Front Airbag Sensor LH Circuit Malfunction (B1615/14)
DESCRIPTION
The front airbag sensor LH consists of parts such as the diagnostic circuit and
the frontal detection sensor.
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DTC B1615/14 is set when a ...
Skid Control Buzzer Circuit (C1A4A)
DESCRIPTION
Based on dynamic radar cruise control system operation, the forward recognition
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DTC C1A4A is stored when a malfunction is detected in the skid control buzzer
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DTC No.
Detectio ...
