Your Vehicle: 2001 Ford Escort ZX2 L4-2.0L DOHC VIN 3
 
Vehicle » Restraints and Safety Systems » Air Bag Systems » Testing and Inspection » Initial Inspection and Diagnostic Overview » Diagnostic Strategies » Diagnosing Customer Concerns » Diagnostic Instructions  
 
 
  Diagnostic Instructions  
 

  

SPECIAL TOOL(S)

The symptom chart can be used to help locate the air bag Supplemental Restraint System (SRS) concerns if no Diagnostic Trouble Codes (DTCs) are retrieved and the listed symptoms are observed. Whether or not the listed symptoms are observed, always perform the following:

  1. Retrieve all DTCs stored in the air bag Electronic Crash Sensor (ECS) module memory. Refer to Retrieve/Clear Continuous DTCs. See: Reading and Clearing Diagnostic Trouble Codes\Displaying & Reading Trouble Codes\Retrieve/Clear Continuous DTCs
  2. Run the On-Demand Self Test to determine what DTCs are currently being sensed by the ECS. Refer to On-Demand Self Test. See: Reading and Clearing Diagnostic Trouble Codes\Displaying & Reading Trouble Codes\On-Demand Self Test
  3. If the stored DTCs are different than the current DTCs, always repair the current DTCs first.
  4. If memory displays different continuous DTCs than the On-Demand Self Test, perform in the following order:
    • On-Demand Self Test
    • Memory (Retrieve/Clear Continuous DTCs)

A DTC can indicate several concerns. The DTCs are to assist in system diagnosis and are not to be considered definitive. Always refer to the pinpoint test corresponding to the DTC to determine where the concern lies and to repair the concern correctly. The SRS diagnostics can be divided into three sections:

  • diagnostic test modes
  • PID/data monitor and record
  • active command modes

Diagnostic Test Modes
Two menu options are available under the diagnostic test modes:

  • Retrieve/Clear Continuous DTCs
  • On-Demand Self Test