GF1A TRANSFER / 4WD / AWD DYNAMIC TORQUE CONTROL AWD SYSTEM PRECAUTION
TROUBLESHOOTING PRECAUTION
- NOTICE:
- ·
Since the Dynamic Torque Control AWD system may be influenced by a malfunction in other systems, be sure to check for DTCs in the other systems.
·When removing and installing the 4WD ECU assembly and each sensor, be sure to check that the normal display is output in DTC output inspection after installing all the parts.
·Replace the 4WD ECU assembly with a new one.
·When the yaw rate and acceleration sensor (airbag ECU assembly) is replaced, Reset Memory must be performed.
PRECAUTION WHEN USING SPEEDOMETER TESTER
- NOTICE:
- ·
Testers with a load setting mechanism for 2 wheels only (models with a power absorption mechanism for 2 wheels only: 2-wheel chassis dynamometer, or any combination testers such as 2-wheel chassis dynamometer with speedometer tester or brake tester) cannot be used by themselves.
·Perform the inspection on the front wheels.
·Do not start off, accelerate or decelerate suddenly.
·The vehicle speed should be 60 km/h or less. (When a free roller is in use, the vehicle speed should be 50 km/h or less)
·The driving time should be within 1 minute.
Method for entering AWD control prohibited mode
- NOTICE:
- ·
AWD control prohibited mode ends by turning the ignition switch off. Therefore, in order to continue inspection after the ignition switch is turned off, perform the procedure to enter AWD control prohibited mode again.
·Do not drive the vehicle with AWD control prohibited mode still active.
·Perform steps (*B) through (*F) within 120 seconds.
·If entering AWD control prohibited mode cannot be confirmed, turn the ignition switch off and repeat the procedure from step (*A).
·When turning the brake pedal ON/OFF, securely perform the action of depressing/releasing the pedal until the stop light switch turns on/off.
·When turning the parking brake ON/OFF, perform the action of releasing/applying the brake until the parking brake indicator light in the combination meter assembly turns on/off.
Ensure that the ignition switch is off and the engine is stopped (Step "A").
Turn the ignition switch ON (Step "B").
Apply the parking brake (Step "C").
Depress and release the brake pedal twice (Step "D").
While holding the brake pedal down, release and apply the parking brake twice (Step "E").
With the parking brake applied, depress and release the brake pedal twice (Step "F").
Check that "AWD TEST MODE" is displayed on the multi-information display (Step "G"). (Check that AWD control is prohibited)
When using speedometer tester
Place the front wheels onto the roller.
Place the rear wheels onto the free roller or safety stand.
| *1 | Safety stand | *2 | Free roller |
| *a | When using drum tester | *b | "4WD Control Prevention Mode" |
Secure the vehicle with lock chains.
- HINT:
-
The position of the lock chain in the illustration is for reference only.
for Automatic Transaxle: With the shift position in D, measure the vehicle speed while increasing the speed gradually.
for Manual Transaxle: Measure the vehicle speed while increasing the speed gradually.
Measure the vehicle speed while increasing the speed gradually.
- NOTICE:
-
Do not use the parking brake. If brake is applied only on the rear wheels during high engine speed, it may cause 4WD function effectiveness to decline, drivetrain parts to malfunction or the vehicle to move unexpectedly.
Cancel AWD control prohibited mode
Turn the ignition switch off, wait for 60 seconds or more and cancel AWD control prohibited mode.
- NOTICE:
- ·
Be sure to cancel "4WD Control Prevention Mode" after the measurement.
·Do not drive the vehicle while in "4WD Control Prevention Mode".
·Turn the ignition switch off when 60 seconds or more have elapsed since the AWD control prohibited mode was entered. If the ignition switch is turned off within 60 seconds, AWD control prohibited mode continues when the ignition switch is turned ON again.
Check that "AWD TEST MODE" is not displayed on the multi-information display. (Check AWD control starts)
PRECAUTION WHEN USING BRAKE TESTER
- NOTICE:
- ·
A tester with a load measurement mechanism cannot be used.
·A high-speed type brake tester cannot be used.
Method for entering AWD control prohibited mode
- NOTICE:
- ·
AWD control prohibited mode ends by turning the ignition switch off. Therefore, in order to continue inspection after the ignition switch is turned off, perform the procedure to enter AWD control prohibited mode again.
·Do not drive the vehicle with AWD control prohibited mode still active.
·Perform steps (*B) through (*F) within 120 seconds.
·If entering AWD control prohibited mode cannot be confirmed, turn the ignition switch off and repeat the procedure from step (*A).
·When turning the brake pedal ON/OFF, securely perform the action of depressing/releasing the pedal until the stop light switch turns on/off.
·When turning the parking brake ON/OFF, perform the action of releasing/applying the brake until the parking brake indicator light in the combination meter assembly turns on/off.
Ensure that the ignition switch is off and the engine is stopped (Step "A").
Turn the ignition switch ON (Step "B").
Apply the parking brake (Step "C").
Depress and release the brake pedal twice (Step "D").
While holding the brake pedal down, release and apply the parking brake twice (Step "E").
With the parking brake applied, depress and release the brake pedal twice (Step "F").
Check that "AWD TEST MODE" is displayed on the multi-information display (Step "G"). (Check that AWD control is prohibited)
When using brake tester
Place the wheels to be tested (front or rear) onto the roller.
for Automatic Transaxle: Shift position in N.
for Manual Transaxle: Move the shift lever to neutral.
Drive the roller of the brake tester and measure.
- HINT:
-
The driving time should be within 1 minute.
Cancel AWD control prohibited mode
Turn the ignition switch off, wait for 60 seconds or more and cancel AWD control prohibited mode.
- NOTICE:
- ·
Be sure to cancel "4WD Control Prevention Mode" after the measurement.
·Do not drive the vehicle while in "4WD Control Prevention Mode".
·Turn the ignition switch off when 60 seconds or more have elapsed since the AWD control prohibited mode was entered. If the ignition switch is turned off within 60 seconds, AWD control prohibited mode continues when the ignition switch is turned ON again.
Check that "AWD TEST MODE" is not displayed on the multi-information display. (Check AWD control starts)
PRECAUTION WHEN USING CHASSIS DYNAMOMETER
Method for entering AWD control prohibited mode
- NOTICE:
- ·
AWD control prohibited mode ends by turning the ignition switch off. Therefore, in order to continue inspection after the ignition switch is turned off, perform the procedure to enter AWD control prohibited mode again.
·Do not drive the vehicle with AWD control prohibited mode still active.
·Perform steps (*B) through (*F) within 120 seconds.
·If entering AWD control prohibited mode cannot be confirmed, turn the ignition switch off and repeat the procedure from step (*A).
·When turning the brake pedal ON/OFF, securely perform the action of depressing/releasing the pedal until the stop light switch turns on/off.
·When turning the parking brake ON/OFF, perform the action of releasing/applying the brake until the parking brake indicator light in the combination meter assembly turns on/off.
Ensure that the ignition switch is off and the engine is stopped (Step "A").
Turn the ignition switch ON (Step "B").
Apply the parking brake (Step "C").
Depress and release the brake pedal twice (Step "D").
While holding the brake pedal down, release and apply the parking brake twice (Step "E").
With the parking brake applied, depress and release the brake pedal twice (Step "F").
Check that "AWD TEST MODE" is displayed on the multi-information display (Step "G"). (Check that AWD control is prohibited)
When using chassis dynamometer
Use the following methods to perform the test.
| *1 | Propeller Shaft Assembly | - | - |
| *a | 2-wheel Chassis Dynamometer | *b | 4-wheel Driven Chassis Dynamometer (Mechanical Front/back Synchronized Type) |
| *c | 4-wheel Driven Chassis Dynamometer (Electric Front/back Synchronized Type) | - | - |
|
Remove | - | - |
- NOTICE:
- ·
Do not suddenly accelerate or apply the brake.
·Failure to observe the following methods may cause 4WD function effectiveness to decline, drivetrain parts to malfunction or the vehicle to move unexpectedly.
Vehicle Condition Chassis Dynamometer Vehicle Speed, Test Time Propeller Shaft Assembly *a
(*1)2-wheel Chassis Dynamometer No limit Remove *b 4-wheel Driven Chassis Dynamometer (Mechanical Front/back Synchronized Type) No limit Normal *c
(*1)(*2)4-wheel Driven Chassis Dynamometer (Electric Front/back Synchronized Type) No limit Remove
- NOTICE:
- ·
(*1): Be sure to enter "4WD Control Prevention Mode" in order to perform the test with the vehicle in front wheel drive. If performed under other conditions, "AWD System Overheated 2WD Mode Engaged" is displayed on the multi-information display and the drivetrain may be damaged.
·(*2): Do not use the electric front/back synchronized type 4-wheel driven chassis dynamometer with the propeller shaft assembly installed since the drivetrain may be damaged. (However, use with the propeller shaft assembly removed is possible)
Cancel AWD control prohibited mode
Turn the ignition switch off, wait for 60 seconds or more and cancel AWD control prohibited mode.
- NOTICE:
- ·
Be sure to cancel "4WD Control Prevention Mode" after the measurement.
·Do not drive the vehicle while in "4WD Control Prevention Mode".
·Turn the ignition switch off when 60 seconds or more have elapsed since the AWD control prohibited mode was entered. If the ignition switch is turned off within 60 seconds, AWD control prohibited mode continues when the ignition switch is turned ON again.
Check that "AWD TEST MODE" is not displayed on the multi-information display. (Check AWD control starts)
CAUTIONS FOR TOWING DYNAMIC TORQUE CONTROL AWD VEHICLE
Tow the vehicle with all 4 wheels on the ground or lifted up. When towing the vehicle with all 4 wheels on the ground, limit the tow speed to 30 km/h (19 mph) or less and the tow distance to 80 km (50 miles) or less, and tow the vehicle in the forward direction.
- NOTICE:
-
If the vehicle is towed above this speed and beyond this distance or is towed in reverse direction, the transaxle may be affected or damaged.
Do not tow with only the front or rear wheels lifted up. If the driving system or drivetrain is malfunctioning, transport the vehicle with all 4 wheels lifted up.
| *A | Tow Truck (Rear Wheels on the Ground) | *B | Tow Truck (Front Wheels on the Ground) |
| *C | Tow Truck (Sling-type) | - | - |
- NOTICE:
- ·
Do not use a sling-type towing method. If a sling-type tow truck is used, damage may occur to the vehicle body.
·Towing with only the front wheels or rear wheels lifted up may damage drivetrain parts or cause the wheels to jump out of the tow truck.
Use one of the methods shown below to tow the vehicle.
| *A | Car Carrier | *B | Tow Truck (4 Wheels Lifted) |
| *C | Tow Truck (4 Wheels on the Ground)
- Limit the tow speed to 30 km/h (19 mph) or less - Limit the tow distance to 80 km (50 miles) or less |
- | - |
- NOTICE:
- ·
If there is a malfunction in the chassis or drivetrain, use the car carrier.
·When towing the vehicle, do not use any towing method other than those shown in the illustration.
| Towing Method | Parking Brake | Transmission Shift Lever Position |
|---|---|---|
| Car Carrier | Parking brake applied* | Any position |
| Tow Truck (4 Wheels Lifted) | Parking brake applied* | Any position |
| Tow Truck (4 Wheels on the Ground) | Parking brake not applied | Shift position in N |
- CAUTION:
-
*: The braking force of the electric parking brake changes according to the tilt of the vehicle. When towing the vehicle, pull the parking brake switch 2 times (2 lock operations) to apply the maximum amount of braking force to prevent the wheels from moving unexpectedly.
- HINT:
-
The steering lock cannot be released with the battery fully depleted or the cable disconnected from the negative (-) battery terminal.