Do not connect aftermarket accessories into the following
circuits:
Caution: When you are performing service on or near the SIR components or the
SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System.
Failure to follow the correct procedure could cause air bag deployment,
personal injury, or unnecessary SIR system repairs.
| • | SIR circuits,
all such circuits are indicated on circuit diagrams with the SIR symbol. |
Notice: The OBD II symbol is used on the circuit diagrams in order
to alert the technician that the circuit is essential for proper OBD II emission
control circuit operation. Any circuit which fails and causes the malfunction
indicator lamp (MIL) to turn ON, or causes emissions-related component damage,
is identified as an OBD II circuit.
| • | OBD II circuits, all such circuits are indicated on circuit diagrams
with the OBD II symbol. |
Always check for aftermarket accessories (non-OEM) as the first step
in diagnosing electrical problems. If the vehicle is so equipped, disconnect
the system to verify that these add-on accessories are not the cause of
the problems.
Possible causes of vehicle problems related to aftermarket accessories
include:
| • | Power feeds connected to points other than the battery |
| • | Transceiver wiring located too close to vehicle electronic modules
or wiring |
| • | Poor shielding or poor connectors on antenna feed line |
| • | Check for recent service bulletins detailing installation guidelines
for aftermarket accessories. |
