Acura 3.5 RL, Manual

Page: 396 / 1453

PGM-FI System
MIL Circuit Troubleshooting (cont'd)
(From page 11-71 )
Check for an open in the wires
(PG, LG lines):
1. Reconnect the fuel injector
and IAC valve connectors.
2. Measure voltage between
body ground and the PCM
connector terminals A12, A25,
A26, and 69 individually.
Is there less than 1.0 V?
YES
Check for a short in the wires
(VCC1, VCC2 lines):
Measure voltage between body
ground and the PCM connector
terminals DID and 021 individu-
ally.
Is there about 5 V?
NO
YES
Substitute a known-good PCM
and recheck. If symptom/indica-
tion goes away, replace the origi-
nal PCM.
PCM CONNECTOR A (26P)
LG1
(BRN/BLK)
Repair open in the wire(s)
between the PCM and G101 that
had more than 1.0 V.
Check for a short in a sensor:
While measuring voltage between
body ground and the PCM con-
nector terminals D10 and D21
individually, disconnect the 3P
connector of each sensor one at
a time.
— MAP sensor
— TP sensor
— EGR valve lift sensor
— Fuel tank pressure sensor
— VSA control valve angle sensor
Is there about 5 V?
NO
Check for a short in the wires
(VCC1, VCC2 lines):
1. Turn the ignition switch OFF.
2. Disconnect the ECM connec-
tor D (22P).
3. Check for continuity between
body ground and ECM con-
nector terminals D10 and D21
individually.
Is there continuity?
NO
Substitute a known-good PCM
and recheck. If symptom/indica-
tion goes away, replace the origi-
nal PCM.
Wire side of female terminals
Replace the sensor that had
about 5 V.
Repair short in the wire between
the MAP sensor, TP sensor, EGR
valve position sensor, fuel tank
pressure sensor or VSA control
valve angle sensor and PCM.