Toyota Tacoma (2015-2018) Service Manual: ECU Power Source Circuit
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
INSPECT BATTERY |
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
| NG | .gif) |
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (+B AND IG TERMINAL) |
(a) Turn the ignition switch off.
|
(b) Disconnect the 4 wheel drive control ECU connector. |
|
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
F13-21 (+B) - Body ground |
Always |
11 to 14 V |
|
F12-4 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
|
*a |
Front view of wire harness connector (to 4 Wheel Drive Control ECU) |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR (+B OR IG CIRCUIT) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (GND TERMINAL) |
(a) Turn the ignition switch off.
(b) Disconnect the 4 wheel drive control ECU connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) |
4WD ECU Malfunction (P163B)
DESCRIPTION
This DTC is output when a malfunction is detected in the 4 wheel drive control
ECU internal circuit.
DTC No.
Detection Item
DTC Detection Condition
...
Lock Switch Circuit
WIRING DIAGRAM
PROCEDURE
1.
CHECK REAR DIFFERENTIAL LOCK INDICATOR LIGHT
(a) Turn the ignition switch to ON.
(b) for 4WD:
Finish switching to L4.
(c) Check the ...
Other materials:
Room Light Assembly
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE NO. 1 ROOM LIGHT ASSEMBLY
(a) Using a screwdriver with its tip wrapped in protective tape, disengage
the 4 claws to remove the No. 1 room light lens.
Text in Illustration
*a
...
Noise Filter(for 2tr-fe)
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE AIR CLEANER ASSEMBLY
(See page )
3. REMOVE RADIO SETTING CONDENSER
(a) Disconnect the connector.
(b) Remove the tape and the radio setting condenser.
Instal ...
Front Occupant Classification Sensor RH Circuit Malfunction (B1781)
DESCRIPTION
The front occupant classification sensor RH circuit consists of the occupant
detection ECU and the front occupant classification sensor RH.
DTC B1781 is set when a malfunction is detected in the front occupant classification
sensor RH circuit.
DTC No.
DTC Det ...
