Eugenio,77
mail@toyota-club.net
© Toyota-Club.Net Jun 2021
New Land Cruiser equipped with transfer JF2BM, that mainly seems JF2A of former LC 200, except the new oil pump, and the same principle: 2-range with LSD Torsen type center differential + mechanical locking.
1 - low planetary gear, 2 - input shaft, 3 - oil pump rotor, 4 - gear shift fork 2, 5 - gear shift fork 1, 6 - driven sprocket, 7 - silent chain, 8 - shift actuator, 9 - rear output shaft, 10 - center differential case
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Front differential - SD22B (free, 2 pinions) or SD22BN (w/ locking, 4 pinions).
Rear differential - BD24C (free, 2 pinions) or BD24CN (w/ locking, 4 pinions) or BD24CT (LSD Torsen).
The locking of front/rear differential is permitted under conditions:
- transfer L4L mode selected
- speed less than 8 km/h
Front differential. 1 - side gear (dog clutch), 2 - lock spring, 3 - lock cam ring, 4 - differential case, 5 - lock position plate, 6 - lock coil
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Rear differential. 1 - side gear (dog clutch), 2 - differential case, 3 - lock plunger, 4 - lock coil, 5 - lock position plate, 6 - lock cam ring, 7 - lock spring
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The principle of operation is similar to other variations of "E-locker": when current is applied to the coil, the lock cam ring moves and engages with the back side of the side gear (performed as dog clutch) so locking the differential. The state of the differentials is monitored by the lock actuation sensors.
A - normal driving, B - left wheel spinning (diff not locked), C - differential lock engaged. 1 - lock coil, 2 - lock cam ring, 3 - side gear (dog clutch)
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DTC of 4WD control system (LC 300):
DTC # |
Item |
P17A811 | Transfer Case Shift Motor Control Circuit Short to Ground |
P17A812 | Transfer Case Shift Motor Control Circuit Short to Battery |
P17B811 | Front Differential Unit Actuator A Control Circuit Circuit Short to Ground |
P17B812 | Front Differential Unit Actuator A Control Circuit Circuit Short to Battery |
P17B813 | Front Differential Unit Actuator A Control Circuit Circuit Open |
P17B81C | Front Differential Unit Actuator A Control Circuit Circuit Voltage Out of Range |
P17B949 | Differential Unit Actuator Control Module Internal Electronic Failure |
P17C211 | Rear Differential Unit Actuator A Control Circuit Circuit Short to Ground |
P17C212 | Rear Differential Unit Actuator A Control Circuit Circuit Short to Battery |
P17C213 | Rear Differential Unit Actuator A Control Circuit Circuit Open |
P17C21C | Rear Differential Unit Actuator A Control Circuit Circuit Voltage Out of Range |
P17CA9E | Rear Differential Lock Switch A Stuck On |
P17CA9F | Rear Differential Lock Switch A Stuck Off |
P17DE13 | Center Differential Lock Shift Motor Circuit Open |
P17DF62 | Center Differential Lock Limit Switch Signal Compare Failure |
P17EE11 | Front Differential Unit Actuator A Position Sensor A Circuit Circuit Short to Ground |
P17EE15 | Front Differential Unit Actuator A Position Sensor A Circuit Circuit Short to Battery or Open |
P17EF1C | Front Differential Unit Actuator A Position Sensor A Circuit Voltage Out of Range |
P17F328 | Front Differential Unit Actuator A Current Sensor A Signal Bias Level Out of Range / Zero Adjustment Failure |
P17F428 | Rear Differential Unit Actuator A Current Sensor A Signal Bias Level Out of Range / Zero Adjustment Failure |
P17F813 | Transfer Case H-L Motor Circuit Open |
P17F928 | Transfer Case Shift Motor Current Sensor A Signal Bias Level Out of Range / Zero Adjustment Failure |
P17FA9E | Front Differential Lock Switch A Stuck On |
P17FA9F | Front Differential Lock Switch A Stuck Off |
P17FB62 | Transfer Case H-L Motor Limit Switch Signal Compare Failure |
U010187 | Lost Communication with TCM Missing Message |
U012987 | Lost Communication with Brake System Control Module A Missing Message |
Toyota all-wheel drive. Review
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ATC/DTC ·
V-Flex ·
DTV ·
i-Four ·
Torsen ·
E-Four ·
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C.Diff Auto
A241H /
A540H ·
C.Diff Lock ·
C.Diff Visc ·
FT-Visc ·
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