Toyota Tacoma (2015-2018) Service Manual: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the engine immobiliser system.
*: Use the Techstream.
PROCEDURE
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1. |
VEHICLE BROUGHT TO WORKSHOP |
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.gif)
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2. |
CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
- The following 5 items are important points for problem analysis:
|
What |
Vehicle model, system name |
|
When |
Date, time, occurrence frequency |
|
Where |
Road conditions |
|
Under what conditions? |
Driving conditions, weather conditions |
|
How did it happen? |
Problem symptoms |
|
|
3. |
INSPECT BATTERY VOLTAGE |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
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4. |
CRANK ENGINE FOR MORE THAN 10 SECONDS |
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5. |
CHECK FOR DTCS (ENGINE IMMOBILISER SYSTEM)* |
(a) Check for DTCs and note any codes that are output.
(b) Clear the DTCs.
Click here .gif)
(c) Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC by simulating the symptoms indicated by the DTCs.
|
Result |
Proceed to |
|---|---|
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No DTCs are output |
A |
|
Engine immobiliser system DTC is output |
B |
| B | .gif) |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
|
6. |
CHECK FOR DTCS (SFI SYSTEM)* |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
HINT:
The DTCs for the engine immobiliser system are specified below. If other DTCs are output, check the DTC chart for the SFI system.
|
Result |
Proceed to |
|---|---|
|
No DTCs are output |
A |
|
Engine immobiliser system DTC is output (DTC B2799, B279A or B279C) |
B |
|
SFI system DTC is output (except DTC B2799, B279A and B279C) (for 2TR-FE) |
C |
|
SFI system DTC is output (except DTC B279986, B279A12 and B279C95) (for 2GR-FKS) |
D |
| B | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
| C | |
GO TO SFI SYSTEM |
| D | |
GO TO SFI SYSTEM |
|
|
7. |
READ VALUE USING TECHSTREAM* |
(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 / Immobiliser / Data List.
(e) Read the Data List according to the display on the Techstream.
Immobiliser|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Key SW |
Unlock warning switch signal/ON or OFF |
ON: Key in ignition key cylinder OFF: No key in ignition key cylinder |
- |
OK:
On the Techstream screen, the item changes between ON and OFF according to the chart above.
| NG | |
GO TO DTC B2780 |
|
|
8. |
PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
|
Result |
Proceed to |
|---|---|
|
Fault is not listed in Problem Symptoms Table |
A |
|
Fault is listed in Problem Symptoms Table |
B |
| B | |
GO TO STEP 10 |
|
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9. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test
Click here
(b) Terminals of ECU
Click here
|
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10. |
REPAIR OR REPLACE |
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11. |
CONFIRMATION TEST |
| NEXT | |
END |
System Diagram
SYSTEM DIAGRAM
...
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 ...
Other materials:
Clutch start cancel switch
The switch allows the vehicle to be driven out of difficult situations by cranking
the engine with the clutch engaged.
Never use the switch for normal engine starting. Be sure to follow the starting
procedure.
Press the CLUTCH START CANCEL switch to cancel the clutch start system when the
...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals may be ...
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Air Conditioning System
DTC Code
Detection Item
Memory
See page
B1411/11
Room Temperature Sensor Circuit
Memorized
(4 seconds or more)
B1412/12
...
