Acura RSX Honda Integra. Manual — part 173
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S6M6AEJK72100091078FAAT00
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DTC P1078:
Special Tools Required
YES
NO
YES
NO
YES
NO
YES
NO
11-398
Intake Air System
DTC Troubleshooting (cont’d)
A
B
IG1
(BLK/YEL)
IMT (IMRC)
(RED/BLU)
IMT (IMRC) SOLENOID VALVE
2P CONNECTOR
IG1 (BLK/YEL)
IMT (IMRC) SOLENOID VALVE
2P CONNECTOR
IMT (IMRC) System Malfunction
(High rpm) Stuck Long
(2002-2004 models)
Vacuum pump/gauge, 0
30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
1. Reset the ECM/PCM (see page 11-4).
2. Start the engine. Hold the engine speed at
3,000 rpm without load (in Park or neutral) until the
radiator fan comes on.
3. Raise the engine speed to 5,000 rpm.
Go to step 4.
Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the intake manifold tuning (IMT) (intake manifold
runner control (IMRC)) solenoid valve and the ECM/
PCM.
4. Disconnect the vacuum hose (A) from the intake
manifold tuning (IMT) (intake manifold runner
control (IMRC)) actuator (B), and connect the
vacuum pump/gauge, 0
30 in.Hg, to the hose.
5. Raise the engine speed to 5,000 rpm.
Go to step 6.
Go to step 15.
6. Turn the ignition switch OFF.
7. Disconnect the IMT (IMRC) solenoid valve 2P
connector.
8. Start the engine.
9. Raise the engine speed to 5,000 rpm, then measure
voltage between IMT (IMRC) solenoid valve 2P
connector terminals No. 1 and No. 2.
Replace the IMT (IMRC) solenoid valve.
Go to step 10.
10. Measure voltage between IMT (IMRC) solenoid
valve 2P connector terminal No.1 and body ground.
Go to step 11.
Check the No. 4 ACG (10 A) fuse in the under-
dash fuse/relay box. If the fuse OK, repair open in
the wire between the IMT (IMRC) solenoid valve
and the No. 4 ACG (10 A) fuse.
Wire side of female terminals
Wire side of female terminals
Is DT C P107 8 indicated?
Is ther e vacuum?
Is ther e batter y voltage?
Is ther e batter y voltage?
05/06/27 17:42:32 61S6M040_110_0398
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YES
NO
YES
NO
YES
NO
11-399
IMT (IMRC)
(RED/BLU)
JUMPER
WIRE
IMT (IMRC) SOLENOID VALVE
2P CONNECTOR
ECM/PCM CONNECTOR B (24P)
IMT (IMRC)
(RED/BLU)
A
IMT (IMRC) VALVE POSITION
SENSOR 3P CONNECTOR
SG1
IMTVPS
(IMRCVPS)
11. Turn the ignition switch OFF.
12. Disconnect ECM/PCM connector B (24P).
13. Connect IMT (IMRC) solenoid valve 2P connector
terminal No. 2 to body ground with a jumper wire.
14. Check for continuity between ECM/PCM connector
terminal B22 and body ground.
Update the ECM/PCM if it does not have the
latest software, or substitute a known-good ECM/
PCM (see page 11-6), then recheck. If the symptom/
indication goes away with a known-good ECM/PCM,
replace the original ECM/PCM (see page 11-284).
Repair open in the wire between the ECM/
PCM (B22) and the IMT (IMRC) solenoid valve.
15. Turn the ignition switch OFF.
16. Connect the vacuum pump/gauge, 0
30 in.Hg, to
the IMT (IMRC) actuator (A), then apply vacuum.
Go to step 17.
Replace the IMT (IMRC) valve assembly
(see page 11-413).
17. Disconnect the IMT (IMRC) valve position sensor 3P
connector.
18. At the sensor side, measure resistance between
IMT (IMRC) valve position sensor 3P connector
terminals No. 2 and No. 3.
Update the ECM/PCM if it does not have the
latest software, or substitute a known-good ECM/
PCM (see page 11-6), then recheck. If the symptom/
indication goes away with a known-good ECM/PCM,
replace the original ECM/PCM (see page 11-284).
Replace the IMT (IMRC) valve assembly
(see page 11-413).
Wire side of female terminals
Wire side of female terminals
Terminal side of male terminals
Is ther e continuity?
Does the IMT ( IMRC) actuator hold vacuum?
Is ther e about 3.2 k
at r oom temper atur e?
05/06/27 17:42:32 61S6M040_110_0399
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*01
*02
S6M6AEDK72100091078FAAT00
−
−
−
−
−
−
DTC P1078:
Special Tools Required
YES
NO
YES
NO
YES
NO
11-400
Intake Air System
DTC Troubleshooting (cont’d)
A
B
A
IMT (IMRC) System Malfunction
(High rpm) Stuck Long
(2005-2006 models)
Vacuum pump/gauge, 0
30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
1. Reset the ECM/PCM with the HDS.
2. Start the engine. Hold the engine speed at
3,000 rpm without load (in Park or neutral) until the
radiator fan comes on, then let it idle.
3. Do the IMT (IMRC) TEST in the INSPECTION MENU
with the HDS.
Intermittent failure, systems OK at this time.
Check for poor connections or loose terminals at
the intake manifold tuning (IMT) (intake manifold
runner control (IMRC)) solenoid valve and the ECM/
PCM.
Go to step 4.
4. Turn the ignition switch OFF.
5. Disconnect the vacuum hose (A) from the IMT
(IMRC) actuator (B), and connect the vacuum
pump/gauge, 0
30 in. Hg, to the hose.
6. Start the engine.
7. Do the IMT (IMRC) TEST in the INSPECTION MENU
with the HDS.
Replace the IMT (IMRC) solenoid valve
(see page 11-413), then go to step 21.
Go to step 8.
8. Apply vacuum using the vacuum pump/gauge,
0
30 in.Hg, to the hose (A).
9. Do the IMT (IMRC) TEST in the INSPECTION MENU
with the HDS,
Check for a restricted air cleaner element
(see page 11-407). If necessary, replace the IMT
(IMRC) solenoid valve (see page 11-413), then go to
step 21.
Go to step 10.
Is the r esult OK ?
Is about 101 kPa ( 29.9 in.Hg, 7 60 mmHg), or about
2.9 V at sea levle indicated with in 5 seconds?
Does the IMT ( IMRC) solenoid valve hold
vacuum?
05/06/27 17:42:33 61S6M040_110_0400
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05
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YES
NO
YES
NO
11-401
IG1 (BLK/YEL)
IMT (IMRC) SOLENOID VALVE
2P CONNECTOR
IMT (IMRC)
(RED/BLU)
JUMPER
WIRE
IMT (IMRC) SOLENOID VALVE
2P CONNECTOR
IMT (IMRC)
(RED/BLU)
ECM/PCM CONNECTOR A (31P)
10. Turn the ignition switch OFF.
11. Disconnect the IMT (IMRC) solenoid valve 2P
connector.
12. Turn the ignition switch ON (II).
13. Measure voltage between IMT (IMRC) solenoid
valve 2P connector terminal No. 1 and body ground.
Go to step 14.
Repair open in the wire between the IMT
(IMRC) solenoid valve and the No. 4 ACG (10 A)
fuse in the under-dash fuse/relay box, then go to
step 20.
14. Turn the ignition switch OFF.
15. Jump the SCS line with the HDS.
16. Disconnect ECM/PCM connector A (31P).
17. Connect IMT (IMRC) solenoid valve 2P connector
terminal No. 2 to body ground with a jumper wire.
18. Check for continuity between ECM/PCM connector
terminal A11 and body ground.
Go to step 19.
Repair open in the wire between the ECM/
PCM (A11) and the IMT (IMRC) solenoid valve, then
go to step 20.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is ther e batter y voltage?
Is ther e continuity?
05/06/27 17:42:33 61S6M040_110_0401
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