PINPOINT TEST F: DTCs B299B AND B29A5 - SUPPRESSOR LEFT/RIGHT CIRCUIT SHORT TO BATTERY - LOOP #1

WARNING: This page is about a different car, the 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.

NOTE: The fire suppression system must be fully operational and free of faults before releasing the vehicle to the customer.

F1 CHECK FOR A HARD OR INTERMITTENT DTC
WARNING: To reduce the risk of accidental deployment, never probe the connectors on the fire suppressors. Failure to follow this instruction may result in personal injury.
- Enter the following diagnostic mode on the scan tool: Retrieve/Record/Flag Continuous DTCs.
- Enter the following diagnostic mode on the scan tool: On-Demand Self-Test.
- Were DTCs B299B or B29A5 retrieved during the on-demand self-test?
Yes : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self-test. GO to F2.

No : This is an intermittent fault. The fault condition is not present at this time. CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition lock cylinder frequently. REPEAT the self-test.

F2 CHECK THE FSM

Key in OFF position.

WARNING: To reduce the risk of accidental deployment, do not use any memory saver devices. Failure to follow this instruction may result in personal injury.

Disconnect the battery. Refer to BATTERY, MOUNTING AND CABLES .
Wait approximately 60 seconds to allow the fire suppression module (FSM) back-up power supply to discharge.
Disconnect: Inline C339.
Connect the battery.
Key in ON position.

Measure the voltage between the inline C339, body harness side and ground as follows:

DTC & CONNECTOR-PIN REFERENCE

DTC	Connector-Pin	Circuit
B299B	C339-3	2312 (LG)
B299B	C339-4	2313 (BK/WH)
B29A5	C339-1	2310 (OG)
B29A5	C339-2	2311 (DG)

Is any voltage present?

Yes : REPAIR the circuit in question. CONNECT the inline C339. CONNECT the battery. GO to F3.

No : INSTALL a new FSM. REFER to FIRE SUPPRESSION MODULE . GO to F3.

F3 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step F1.
- Were any additional continuous DTCs retrieved during Step F1 ?
Yes : GO to the FIRE SUPPRESSION MODULE (FSM) DIAGNOSTIC TROUBLE CODE (DTC) TABLE to continue diagnosis of the fire suppression system.

No : CLEAR the DTCs. REPEAT the self-test.