Toyota Tacoma manuals

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:

Communication Error from ECM to VSC (P1631)
DESCRIPTION The ECM sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, and buzzer operation demand signals to the skid control ECU (brake actuator assembly) when the dynamic radar cruise control is operating. Therefor ...

Precaution
PRECAUTION 1. PRECAUTIONS WHEN CHECKING FOR DTCS (a) When the cable is disconnected from the negative (-) battery terminal, the DTCs stored in the steering lock ECU (steering lock actuator or UPR bracket assembly) are cleared. Be sure to record any output DTCs immediately. (b) Normally, with ...

Terminals Of Ecu
TERMINALS OF ECU 1. MOBILE WIRELESS CHARGER CRADLE ASSEMBLY Tester Connection Wiring Color Terminal Description Condition Specified Condition M5-1 (ACC) - M5-5 (PGND) GR - W-B Power source (ACC) ...

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