Checking The Component And Wiring
Phone module (PHM) receives a directly connected signal from Supplemental restraint system module (SRS) that informs if the vehicle has been involved in a collision. The signal is pulse width modulated and normally has a frequency of 10 Hz. In the event of a collision, the signal frequency increases to 250 Hz (+- 10%).
Check that the status of the Supplemental restraint system module (SRS) is approved. Any diagnostic trouble codes stored in the Supplemental restraint system module (SRS) are to be rectified first.
Connect the adapter cable and breakout box to Phone module (PHM) connector A.
Check that the pulse width modulated signal is between 9 and 11 Hz by reading the frequency between terminals #C1:17 and #C1:6.
If the cable is damaged, replace it.
Other information
- See SIGNAL SPECIFICATION
- See CONNECTING THE BREAKOUT BOX (2009-2011)
- See LOCATION OF COMPONENTS, PHONE MODULE (PHM) (2004-2011)
- See PHONE MODULE (PHM) (2004-2011)
Was a fault detected?
- YES
Refer to VERIFICATION
- NO
FAULT TRACING FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.