Toyota Tacoma (2015-2018) Service Manual: Hazard Warning Switch Circuit
DESCRIPTION
The combination meter assembly receives information signals from the telltale light assembly (hazard warning signal switch).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (HAZARD FLASHER SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) According to the display on the Techstream, read the Data List.
Combination Meter|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Hazard Flasher Switch |
Hazard warning signal switch / OFF or ON |
OFF: Hazard warning signal switch off ON: Hazard warning signal switch on |
- |
OK:
Normal conditions listed above are displayed.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY) |
|
(a) Disconnect the combination meter assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C10-1 (B) - Body Ground |
Always |
11 to 14 V |
|
*a |
Front view of wire harness connector (to Combination Meter Assembly) |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the A33 air conditioning control assembly connector.
(b) Disconnect the C9 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-4 (HAZ) - C9-13 (HAZ) |
Always |
Below 1 Ω |
|
A33-1 (GND) - Body Ground |
Always |
Below 1 Ω |
|
A33-4 (HAZ) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HAZARD WARNING SIGNAL SWITCH) |
(a) Replace the air conditioning control assembly (hazard warning signal switch)
(See page .gif)
).
|
|
5. |
READ VALUE USING TECHSTREAM (HAZARD FLASHER SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) According to the display on the Techstream, read the Data List.
Combination Meter|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Hazard Flasher Switch |
Hazard warning signal switch / OFF or ON |
OFF: Hazard warning signal switch off ON: Hazard warning signal switch on |
- |
OK:
Normal conditions listed above are displayed.
| OK | |
END (AIR CONDITIONING CONTROL ASSEMBLY (HAZARD WARNING SIGNAL SWITCH) WAS DEFECTIVE) |
| NG | |
REPLACE COMBINATION METER ASSEMBLY |
Front Fog Light Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the front fog lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this s ...
Interior Light Auto Cut Circuit
DESCRIPTION
When the battery saving control operates, the main body ECU (multiplex network
body ECU) controls the operation of the DOME CUT relay, that is built in to the
driver side junction blo ...
Other materials:
Vehicle Speed Tolerance Malfunction (C1AA2)
DESCRIPTION
The forward recognition camera receives vehicle speed tolerance signals from
the combination meter assembly. If the combination meter assembly detects a vehicle
speed tolerance malfunction signal, it informs the forward recognition camera via
CAN communication, and DTC C1AA2 is st ...
Washer Motor
Components
COMPONENTS
ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY
HINT:
This check should be performed with the windshield washer motor and pump assembly
installed to the windshield washer jar assembly.
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT CYLINDER BLOCK FOR WARPAGE
(a) Using a precision straightedge and feeler gauge, measure the warpage
of the contact surface of the cylinder head gasket.
Standard warpage:
0 to 0.05 mm (0 to 0.00197 in.)
Maximum warpage:
0.07 mm (0.00276 ...
