Acura CSX. Manual — part 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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