TM9-2320-360-20-3 Section  4 TROUBLESHOOTING CHARTS E. FLASH CODE: 41 J1587   CODE: S21  0  -  TOO  MANY  SRS  (MISSING  TRS) NOTE  - This chart  is only to be used if: 1)  All  basic  mechanical  checks  and  physical  inspections  have  been  performed  with  no  problem  found,  and 2) Diagnosis of DDEC-III was started at step START-1, pg H-25 and you have now been referred here. NOTE - ECM must be removed (para 7-29.1) for access to TRS/SRS connectors. STEP/SEQUENCE RESULT 41-1 Resistance  Check l Turn  ignition  off. l Disconnect  engine  harness connector  at  ECM. l Read  resistance  between  socket T1 and T2 on engine harness connector. 41-2 Check for Short l Disconnect  TRS  connector. l Read  resistance  between  sockets T1 and T2 on the engine harness connector. l Also  read  resistance  between socket T1 and ground, then between  socket  T2  and  ground. 41-3 Open  TRS  Line  Check l Disconnect  TRS  connector  and install  a jumper  wire  between sockets  A  and  B  of  the  TRS connector. l Read  resistance  between  sockets T1 and T2 on the engine harness connector. 41-4 Check   TRS   Resistance l Read resistance of TRS across sensor  pins  A  and  B. Less  than  or equal  to  200  ohms. Greater  than 200  ohms  or  open. Less  than  or equal  to  10,000  ohms on  any  reading. Greater  than 10,000  ohms  or  open on  all  readings. Less  than  or equal to 5 ohms. Greater  than 5 ohms or open. Less  than 100  ohms. From  100  to 200  ohms. Greater  than 200  ohms. WHAT  TO  DO  NEXT Go   to   41-2. Go   to   41-3. A short exists between (ckt #110) and (ckt #109) or where resistance was  less  than  10,000  ohms. Repair  short.  Then  go  to  41-30. Go  to  41-4. Go  to  41-4. Signal line (ckt #110) or return and  (ckt  #109)  is  open.  Repair open.  Then  go  to  41-30. Go  to  41-12. Go  to  41-5. Go  to  41-12. H-191