Acura TSX / Honda Accord CL. Manual — part 624

Fig. 120: Measuring Voltage Between PGM-FI Main Relay 1 4P Connector Terminal No. 2 &
Body Ground

60. Turn the ignition switch OFF.

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

ECM/PCM connector terminals A2 and A3 individually.

Is there continuity?

YES: Replace PGM-FI main relay 1 (FI MAIN).

NO: Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM
(A2, A3).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 121: Checking For Continuity Between PGM-FI Main Relay 1 (FI MAIN) 4P Connector
Terminal No. 1 & ECM/PCM Connector Terminals A2 & A3

62. Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A8 and A9

individually.

Is there more than 0.2 V?

YES: Repair open in the wire(s) that had more than 0.2 V between G101 and the ECM/PCM
(A4, A5, A8, A9).

NO: Go to step 63.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 122: Measuring Voltage Between Body Ground & ECM/PCM Connector Terminals A4,
A5, A8 & A9

63. Measure voltage between body ground and ECM/PCM connector terminal A21.

Is there more than 5 V?

YES: Go to step 71 .

NO: Go to step 64.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 123: Measuring Voltage Between Body Ground & ECM/PCM Connector Terminal A21

64. Turn the ignition switch OFF.

65. Disconnect the connector from each of these sensors, one at a time, and measure voltage between body

ground and ECM/PCM connector terminal A21 with the ignition switch ON (II):

z

Manifold absolute pressure (MAP) sensor

z

Accelerator pedal position (APP) sensor

z

Mainshaft speed sensor (A/T)

Is there about 5 V?

YES: Replace the sensor that restored 5 V when disconnected.

NO: Go to step 66.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX