Toyota Tacoma (2015-2018) Service Manual: Fail-safe Chart

Toyota Tacoma (2015-2018) Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / Fail-safe Chart

FAIL-SAFE CHART

1. FAIL-SAFE OPERATION AND DEACTIVATION CONDITION

TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM

DTC No.	Fail-safe Operation	Fail-safe Deactivation Condition
U0100	Switching between H4 and L4 prohibited (shift position N1 or neutral2 signal interrupted)	CAN communication signal from ECM is received and ignition switch is turned from off to ON
U0122	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	CAN communication signal from skid control ECU is received and ignition switch is turned from off to ON
U0416	Switching from 2WD to H4 and rear differential free to lock3 prohibited When rear differential is set to lock, rear differential switches to free3	Wheel speed sensor malfunction signals from skid control ECU return to normal and ignition switch is turned from off to ON
P163B	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	4 wheel drive control ECU internal circuit returns to normal and ignition switch is turned from off to ON
P17A0	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Recovers from open circuit in A.D.D. shift motor drive circuit and ignition switch is turned from off to ON
P17A4	Switching between 2WD and H4 prohibited	A.D.D. actuator limit switch and A.D.D. position switch (3 circuits) signals return to normal and ignition switch is turned from off to ON
P17A8	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Recovers from open circuit in transfer shift motor drive circuit and ignition switch is turned from off to ON
P17A9	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Recovers from short to ground in transfer shift motor and A.D.D. shift motor*3 drive circuits and ignition switch is turned from off to ON
P17AA	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Recovers from short to B+ in transfer shift motor and A.D.D. shift motor*3 drive circuits and ignition switch is turned from off to ON
P17AC	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Transfer shift actuator limit switch signal returns to normal and ignition switch is turned from off to ON
P17C7	-	Front differential oil temperature sensor enters normal range
P17C8	-	Front differential oil temperature sensor enters normal range
P2772	-	Normal signal from transfer shift actuator L4 detection switch input for 1 second and ignition switch is turned from off to ON
P279E	All switching prohibited When rear differential is set to lock, rear differential switches to free*3	Normal signal from transfer position switch input for 1 second and ignition switch is turned from off to ON

*1: for Automatic Transmission
*2: for Manual Transmission
*3: w/ Differential Lock

Data List / Active Test

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