Acura TSX / Honda Accord CL. Manual — part 623

Fig. 116: Measuring Voltage Between PGM-FI Main Relay 1 (FI MAIN) 4P Connector
Terminal No. 3 & Body Ground

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

ECM/PCM connector terminal E7.

Is there continuity?

YES: Test PGM-FI main relay 1 (FI MAIN) (see RELAYS ). If the relay is OK, 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.

NO: Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM
(E7).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 117: Checking For Continuity Between PGM-FI Main Relay 1 (FI MAIN) 4P Connector
Terminal No. 4 & ECM/PCM Connector Terminal E7

53. Reconnect ECM/PCM connector E (31P).

54. Turn the ignition switch ON (II).

55. Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually.

Is there battery voltage?

YES: Go to step 62 .

NO: Go to step 56.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 118: Measuring Voltage Between Body Ground & ECM/PCM Connector Terminals A2
& A3

56. Turn the ignition switch OFF.

57. Remove PGM-FI main relay 1 (FI MAIN) (A).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 119: Removing PGM-FI Main Relay 1 (FI MAIN)

58. Turn the ignition switch ON (II).

59. Measure voltage between PGM-FI main relay 1 4P connector terminal No. 2 and body ground.

Is there battery voltage?

YES: Go to step 60.

NO: Repair open in the wire between the No. 8 FI ECU (ECM/PCM) (15A) fuse and PGM-
FI main relay 1 (FI MAIN).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX