Component Tests and General Diagnostics
Rear Differential Dual Pump System Function Test
Starting and accelerating in forward gears (4WD mode)
NOTE: Do not test repeatedly, or the differential fluid will overheat.
1. Raise and support the vehicle Service and Repair.
2. Make a mark (A) on either No. 1 or No. 2 propeller shaft (B).
3. Start the engine, and let it idle until the radiator fan comes on at least twice.
4. With the engine at idle, shift to 1.
5. Firmly apply the parking brake to lock the rear wheels, and watch the rotation of the propeller shaft.
- If it takes more than 10 seconds to rotate one time, the 4WD system is normal.
- If it takes less than 10 seconds to rotate one time, there is a problem in the 4WD system. Check the differential fluid first. If the differential fluid is normal, replace the torque control differential (TCD) case kit (front pump portion).
Starting and accelerating in reverse gear (4WD mode)
NOTE: Do not test repeatedly, or the differential fluid will overheat.
1. Raise and support the vehicle Service and Repair.
2. Make a mark (A) on either No. 1 or No. 2 propeller shaft (B).
3. Start the engine, and let it idle until the radiator fan comes on at least twice.
4. With the engine at idle, shift to R.
5. Firmly apply the parking brake to lock the rear wheels, and record the time it takes the propeller shaft to rotate 10 times.
- If the recorded time is more than 10 seconds, the 4WD system is normal.
- If the recorded time is less than 10 seconds, there is a problem in the 4WD system. Check the differential fluid first. If the differential fluid is normal, replace the torque control differential (TCD) case kit.
Decelerating in forward gears (2WD mode)
NOTE: The Accord Crosstour/Crosstour V6 has no rear jacking bracket. Do not use the rear differential assembly, the rear subframe, or rear suspension components as jacking points. Use the following procedure to avoid damaging the vehicle.
1. Place the block on the right front wheel.
2. Position the floor jack under the vehicle's left front support point (A). Center the jack lift platform (B) on the support point, and jack up the vehicle high enough to fit a safety stand (C) under the vehicle's rear support point (D).
3. Carefully lower the jack until the rear support point contacts the safety stand, then remove the jack.
4. Block the left front wheel.
5. Hold the left rear tire, and turn it counterclockwise continuously for more than one rotation.
- If the rotation of the wheel does not gradually feel heavy while rotating, the 2WD system when decelerating in a forward gear is normal.
- If the rotation of the wheel gradually feels heavy while rotating, there is a problem in the system. Check the differential fluid. If the fluid is normal, replace the torque control differential (TCD) case kit.
Decelerating in reverse gears (4WD mode)
NOTE: The Accord Crosstour/Crosstour V6 has no rear jacking bracket. Do not use the rear differential assembly, the rear subframe, or rear suspension components as jacking points. Use the following procedure to avoid damaging the vehicle.
1. Place the block on the right front wheel.
2. Position the floor jack under the vehicle's left front support point (A). Center the jack lift platform (B) on the support point, and jack up the vehicle high enough to fit a safety stand (C) under the vehicle's rear support point (D).
3. Carefully lower the jack until the rear support point contacts the safety stand, then remove the jack.
4. Block the left front wheel.
5. Hold the left rear tire, and turn it clockwise continuously for more than one rotation.
- If the wheel does not rotate, the 4WD system when decelerating in reverse gear is normal.
- If the wheel rotates, there is a problem in the system. Check the differential fluid. If the fluid is normal, replace the torque control differential (TCD) case kit.
