Honda Civic 2002-2003 Service Manual page 312

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59. Check for continuity between ECM connector
terminal A21 and body ground.
ECM CONNECTOR A 131PI
r-"..-o-,VCCI
1- -'+'T'--T-lrlrlhS-'-r.l4--'r"9-i (VElI
REDI
Wire side of female terminals
Is there continuity?
YES-Repair short in the wire between the ECM
(A21) and the MAP sensor .•
NO-Update the ECM il it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lithe symptom/indication
goes away with a known-good ECM, replace the
original ECM .•
60. Measure voltage between body ground and ECM
connector terminal A20.
ECM CONNECTOR A (31PI
=
Wire side of female terminals
Is there about 5 V?
YES-Go to step 68.
NO-Go to step 61 .
9
VCC2
(VEll
BLUI
61. Turn the ignition switch OFF.
62. Disconnect the throttle position (TP) sensor 3P
connector.
63. Turn the ignition switch ON (II).
64. Measure voltage between body ground and ECM
connector terminal A20.
ECM CONNECTOR A 131 PI
Wire side of female terminals
Is there about 5 V?
VCC2
(VEll
BLU)
YES-Replace the throttle body (the TP sensor is
not available separately) .•
NO-Go to step 65.
65. Turn the ignition switch OFF.
66. Disconnect ECM connector A (31P).
con! d
l
11-105