Toyota Tacoma (2015-2018) Service Manual: Fail-safe Chart
FAIL-SAFE CHART
1. FAIL-SAFE OPERATION AND DEACTIVATION CONDITION
DIFFERENTIAL SYSTEM (w/ Differential Lock)|
DTC No. |
Fail-safe Operation |
Fail-safe Deactivation Condition |
|---|---|---|
|
U0122 |
All switching prohibited When rear differential is locked, rear differential switches to free |
CAN communication signal from skid control ECU is received and ignition switch is turned from off to ON |
|
U0416 |
for 4WD: Switching from 2WD to H4 and rear differential free to locked prohibited When rear differential is locked, rear differential switches to free for 2WD: Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Wheel speed sensor malfunction signals from skid control ECU return to normal and ignition switch is turned from off to ON |
|
P163B |
for 4WD: Switching from 2WD to H4 and rear differential free to locked prohibited When rear differential is locked, rear differential switches to free for 2WD: Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
4 wheel drive control ECU internal circuit returns to normal and ignition switch is turned from off to ON |
|
P17BB |
Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Differential lock indicator switch signal returns to normal and ignition switch is turned from off to ON |
|
P17BC |
Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Differential lock indicator switch signal returns to normal and ignition switch is turned from off to ON |
|
P17C0 |
Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Differential lock coil drive circuit of rear differential recovers from ground short and ignition switch is turned from off to ON |
|
P17C1 |
Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Differential lock coil drive circuit of rear differential recovers from battery short and ignition switch is turned from off to ON |
|
P17CC |
Switching from rear differential free to locked prohibited When rear differential is locked, rear differential switches to free |
Differential lock switch signal returns to normal and ignition switch is turned from off to ON |
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Check the DTCs.
(1) Turn the ignition switch off.
(2) Connect the Techstream to the DLC3.
(3) Turn the ignition switch to ON.
(4) Turn the Techstream on.
(5) ...
Freeze Frame Data
FREEZE FRAME DATA
1. FREEZE FRAME DATA
(a) When a DTC is stored, the 4 wheel drive control ECU stores the current vehicle
state as Freeze Frame Data.
HINT:
Freeze Frame Data at the time a DTC is ...
Other materials:
Steering Angle Sensor Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Steering Angle Sensor Communication Stop Mode
Either condition is met:
Communication stop for "Spiral cable (Steering Angle Sensor)"
is indicated on the "C ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
When replacing the skid control ECU (brake actuator assembly), sensor, etc.,
turn the ignition switch off.
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the s ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
*1: for Vacuum Brake Booster
*2: for Hydraulic Brake Booster
Millimeter Wave Radar Sensor Assembly
Forward Recognition Camera
...
