Test Notes

NORMAL OPERATION
Diagnostic Trouble Code 81 refer to Diagnostic Trouble Code 41 The voltage at Pin 16 and Circuit 617 (PK/O) is set by the air bag diagnostic monitor to be slightly less than battery voltage. Circuit 617 is connected to Circuit 624 (Y/W) inside RH radiator primary crash sensor. Therefore, the voltage at Circuit 624 and air bag diagnostic monitor Pin 24 should be the same as the voltage at air bag diagnostic monitor Pin 16.

The air bag diagnostic monitor periodically pulls the voltage at Pin 16 low to verify the connection to Pin 24. If the voltage at Pin 24 does not pull low as a result of this test, the air bag diagnostic monitor will store in memory and flash out on the air bag indicator a DTC 41. If the connection between Pins 16 and 24 is later serviced, the next ignition switch cycle will produce a DTC 81 (or a higher priority DTC if one exists).

POSSIBLE CAUSES

Failure To Get Low Voltage at Pin 24 During the Test Can Be Caused By:

- An open circuit in the wiring harness in either Circuit 617 (PK/O) or Circuit 624 (Y/W).

- An open circuit inside RH radiator primary crash sensor across Circuit 617 (PK/O) or Circuit 624 (Y/W).

- A short to battery or ignition voltage in any of the Circuits 617 (PK/O), 619 (PK/W), 624 (Y/W), 625 (Y/LG).