Acura’s SH-AWD System: AWD Performance Leader
an intermittent problem in the AWD circuits. Be sure to check all connec- tions within the SH-AWD system. After making any repairs it’s always a good idea to update the SH-AWD control module with the latest programming. After replacing the differential
clutch sets, steering angle sensor, or yaw rate sensor, you’ll need to perform a memorization procedure for each of these sensors before the SH-AWD sys- tem will function properly. If you replace the SH-AWD con-
trol module, you’ll need to initialize the new control module with an HDS or compatible scan tool.
Types of Codes
SH-AWD Control Module codes
are usually three- or four-digit codes. The SH-AWD control module codes are broken up into 19 different catego- ries (Refer to figure 4 for a complete code list). Codes beginning with: • 12 or 14 indicate a problem in the lateral/longitudinal acceleration sensor circuit. • 16 or 19 indicate a problem in the
steering angle sensor circuit. • 27 indicate a problem in the hypoid gear speed sensor circuit. • 33 or 35 indicate a problem in the yaw rate sensor circuit. • 41 indicate a loss of communica- tion with another module. • 42 or 43 indicate a differential oil temperature sensor circuit prob- lem. • 44 indicate a problem with a power or ground circuit to the control module. • 46 indicate an internal power source failure in the control module. • 52 or 53 indicate a left clutch elec- tromagnetic coil circuit problem. • 56 or 57 indicate a right clutch electromagnetic coil circuit prob- lem. • 59 indicate a control unit power supply monitor circuit problem. • 61 indicate a solenoid valve circuit problem. • 74 indicate a one-way clutch prob- lem. • 75 indicate an accelerator device problem. • 76 indicate the rear differential
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fluid is overheating. • 77 indicate a functional error from the PCM, ABS or VSA systems. • 78 indicate a control module self- test failure. • 81 indicate a left search coil circuit problem. • 82 indicate a right search coil cir- cuit problem.
Diagnosing SH-AWD system codes
is usually pretty straightforward: check the wiring, connections, and the specif- ic component for failure. Once you’ve repaired the problem, you’ll have to clear the codes from the SH-AWD system with an HDS or compatible scan tool. Well, there you have it: an inside
look at Acura’s Super Handling All- Wheel Drive (SH-AWD) system. With a better understanding of how AWD systems operates, you should have no problem keeping those trannies and
AWD systems rolling.
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10-0185 Gears
Ad.indd 1
GEARS May/June 2010
4/2/10 4:05 PM
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