Acura CSX. Instruction — page 134

06

07

YES

NO

YES

NO

YES

NO

11-210

PGM-FI System

IGP

PGM-FI MAIN RELAY 1 4P CONNECTOR

IGP

PGM-FI MAIN RELAY 1 4P CONNECTOR

46. Disconnect each of the parts or connectors these

parts, one at a time, while checking for continuity
between PGM-FI main relay 1 4P connector
terminal No. 2 and body ground.

• PGM-FI main relay 2 (FUEL PUMP)
• ECM/PCM connector A (44P)
• Each injector 2P connector
• Camshaft position (CMP) sensor B 3P connector
• Crankshaft position (CKP) sensor 3P connector
• Ignition coil relay
• Electronic throttle control system (ETCS) control

relay

Replace the part that made the short to body

ground go away when disconnected. Reconnect all
connectors, then update the ECM/PCM if it does not
have the latest software (see page 11-227), or
substitute a known-good ECM/PCM (see page 11-7),
then recheck. If the symptom/indication goes away
with a known-good ECM/PCM, replace the original
ECM/PCM (see page 11-228). Also replace the
No. 19 FI MAIN (15 A) fuse.

Go to step 47.

47. Disconnect the connectors from these parts:

• PGM-FI main relay 2 (FUEL PUMP)
• ECM/PCM connector A (44P)
• Injectors
• Camshaft position (CMP) sensor B
• Crankshaft position (CKP) sensor
• Ignition coil relay
• Electronic throttle control system (ETCS) control

relay

48. Check for continuity between PGM-FI main relay 1

4P connector terminal No. 2 and body ground.

Repair short in the wire between PGM-FI

main relay 1 and each part. Also replace the No. 19
FI MAIN (15 A) fuse.

Replace PGM-FI main relay 1. Also replace the

No. 19 FI MAIN (15 A) fuse.

49. Inspect the No. 2 FUEL PUMP (15 A) fuse in the

under-dash fuse/relay box.

Go to step 61.

Go to step 50.

50. Remove the blown No. 2 FUEL PUMP (15 A) fuse

from the under-dash fuse/relay box.

Terminal side of female terminals

Terminal side of female terminals

Does continuity go away when one of the above
components is disconnected?

Is ther e continuity?

Is the f use OK ?

08/08/21 14:21:57 61SNR030_110_0210

*02

*03

09

YES

NO

YES

NO

YES

NO

11-211

A

PGM-FI MAIN RELAY 2 (FUEL PUMP) 4P CONNECTOR

IG1

ECM/PCM CONNECTOR C (44P)

IG1 (BLK/GRN)

51. Remove PGM-FI main relay 2 (FUEL PUMP) (A)

from the under-dash fuse/relay box.

52. Test PGM-FI main relay 2 (FUEL PUMP) (see page

22-70).

Go to step 53.

Replace PGM-FI main relay 2 (FUEL PUMP).

Also replace the No. 2 FUEL PUMP (15 A) fuse.

53. Check for continuity between PGM-FI main relay 2

(FUEL PUMP) 4P connector terminal No. 1 and
body ground.

Go to step 54.

Go to step 57.

54. Jump the SCS line with the HDS.

55. Disconnect ECM/PCM connector C (44P).

56. Check for continuity between ECM/PCM connector

terminal C36 and body ground.

Repair short in the wire between the No. 2

FUEL PUMP (15 A) fuse and the ECM/PCM (C36),
between the No. 2 FUEL PUMP (15 A) fuse and
PGM-FI main relay 2 (FUEL PUMP), or between the
No. 2 FUEL PUMP (15 A) fuse and the immobilizer
control unit. Also replace the No. 2 FUEL PUMP
(15 A) fuse.

Replace the No. 2 FUEL PUMP (15 A) fuse,

and update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original ECM/
PCM (see page 11-228).

57. Remove the rear seat cushion (see page 20-131).

58. Remove the rear floor upper cross-member and the

access panel from the floor (see page 11-334).

59. Disconnect the fuel pump 4P connector.

Terminal side of female terminals

Terminal side of female terminals

Is the r elay OK ?

Is ther e continuity?

Is ther e continuity?

08/08/21 14:23:31 61SNR030_110_0211

16

10

YES

NO

YES

NO

11-212

PGM-FI System

FUEL PUMP 4P CONNECTOR

FUEL PUMP
(GRN)

ECM/PCM CONNECTOR C (44P)

IG1 (BLK/GRN)

60. Check for continuity between fuel pump 4P

connector terminal No. 2 and body ground.

Repair short in the wire between the fuel

pump and PGM-FI main relay 2 (FUEL PUMP). Also
replace the No. 2 FUEL PUMP (15 A) fuse.

Check the fuel pump, and replace it if needed

(see page 11-338). Also replace the No. 2 FUEL
PUMP (15 A) fuse.

61. Jump the SCS line with the HDS.

62. Disconnect ECM/PCM connectors A (44P) and C

(44P).

63. Turn the ignition switch to ON (II).

64. Measure the voltage between ECM/PCM connector

terminal C36 and body ground.

Go to step 65.

Repair open in the wire between the No. 2

FUEL PUMP (15 A) fuse and the ECM/PCM (C36).

Wire side of female terminals

Terminal side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

08/08/21 14:23:31 61SNR030_110_0212

20

*04

12

YES

NO

YES

NO

11-213

ECM/PCM CONNECTOR A (44P)

MRLY (GRN)

C

B

PGM-FI MAIN RELAY 1 4P CONNECTOR

65. Measure the voltage between ECM/PCM connector

terminal A6 and body ground.

Go to step 70.

Go to step 66.

66. Turn the ignition switch to LOCK (0).

67. Remove PGM-FI main relay 1 (C) from the under-

hood fuse/relay box.

68. Measure the voltage between PGM-FI main relay 1

4P connector terminal No. 3 and body ground.

Go to step 69.

Replace the under-hood fuse/relay box

(see page 22-65).

Terminal side of female terminals

Terminal side of female terminals

Is ther e batter y voltage?

Is ther e batter y voltage?

08/08/21 14:23:32 61SNR030_110_0213

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