Acura TSX / Honda Accord CL. Manual - part 620

Fig. 104: Checking For Continuity Between Body Ground & PGM-FI Main Relay 1 (FI 
MAIN) 4P Connector Terminals No. 2 & No. 3 

28. Disconnect each of the components or connectors below, one at a time, and check for continuity between 

PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground: 

z

PGM-FI main relay 2 (FUEL PUMP)  

z

ECM/PCM connector A (31P)  

z

Each injector 2P connector  

z

Camshaft position (CMP) sensor B 3P connector  

z

Crankshaft position (CKP) sensor 3P connector 

Is there continuity? 

YES: Go to step 29.  

NO: Replace the component that made the short to body ground go away when 
disconnected. If the item is the ECM/PCM, update the ECM/PCM if it does not have 
the latest software, or substitute a known-good ECM/PCM, then recheck (see HOW 
TO SUBSTITUTE THE ECM/PCM ). If the symptom/indication goes away with a 
known-good ECM/PCM, replace the original ECM/PCM. Also replace the No. 8 FI 
ECU (ECM/PCM) (15A) fuse. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

Fig. 105: Checking For Continuity Between PGM-FI Main Relay 1 (FI MAIN) 4P Connector 
Terminal No. 1 & Body Ground 

29. Disconnect the connectors from these components: 

z

PGM-FI main relay 2 (FUEL PUMP)  

z

ECM/PCM connector A (31P)  

z

Injectors  

z

Camshaft position (CMP) sensor B  

z

Crankshaft position (CKP) sensor  

30. Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body 

ground. 

Is there continuity? 

YES: Repair short in the wire between PGM-FI main relay 1 (FI MAIN) and each item. Also 
replace the No. 8 FI ECU (ECM/PCM) (15A) fuse.  

NO: Replace PGM-FI main relay 1 (FI MAIN). Also replace the No. 8 FI ECU (ECM/PCM) 
(15A) fuse.  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

Fig. 106: Checking For Continuity Between PGM-FI Main Relay 1 (FI MAIN) 4P Connector 
Terminal No. 1 & Body Ground 

31. Inspect the No. 19 FUEL PUMP (15A) fuse in the under-dash fuse/relay box. 

Is the fuse OK? 

YES: Go to step 44 .  

NO: Go to step 32.  

32. Remove the blown No. 19 FUEL PUMP (15A) fuse from the under-dash fuse/relay box.  

33. Jump the SCS line with the HDS.  

34. Disconnect ECM/PCM connector E (31P).  

35. Check for continuity between ECM/PCM connector terminal E9 and body ground. 

Is there continuity? 

YES: Go to step 36.  

NO: Replace the No. 19 FUEL PUMP (15A) fuse, and update the ECM/PCM if it does not 
have the latest software, or substitute a known-good ECM/PCM, then recheck (see HOW 
TO SUBSTITUTE THE ECM/PCM ). If the symptom/indication goes away with a known-
good ECM/PCM, replace the original ECM/PCM. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX

  

 

Fig. 107: Checking For Continuity Between ECM/PCM Connector Terminal E9 & Body 
Ground 

36. Remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREA ), then remove 

PGM-FI main relay 2 (FUEL PUMP) (A) from the under-hood fuse/relay box. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE PGM-FI System - TSX