Diagnostic System Check

TEST DESCRIPTION

Steps 1-5:

Steps 6-8:

The numbers below refer to the step numbers on the diagnostic table.
2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
4. Tests for an open in the PASSLOCK(TM) sensor signal circuit, which may not set a DTC (B2958) under certain conditions.
5. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
6. The presence of DTC P0601, P0602, P0603, P0604, P0605, P0606, P1621, or P1627 indicates an internal fault in the PCM.
7. The presence of DTC B1007 indicates an internal module fault.
8. The presence of DTC P0562, P0563, P1637, or P1638 indicates a low or high voltage condition.