Honda NSX-T 1998 Manual page 599

Main Menu
Idle Control System
Neutral Switch Signal (M/T)
This signals the ECM when the transmission is in neutral.
Inspection of neutral switch signal.
Check for an open in the wire
(NTSW line):
1. Turn the ignition switch ON (II).
2. Measure voltage between ECM
connector terminals B4 and
A26.
Is there voltage?
Check for a short in the wire
(NTSW line):
1. Shift transmission into gear.
2. Measure voltage between ECM
connector terminals B4 and
A26.
Is there approx. 5 V?
Neutral switch signal is OK.
Table of Contents
Check for an open in the wire
(NTSW line):
1. Turn the ignition switch OFF.
2. Disconnect the 3P connector
from the neutral switch.
3. Connect neutral switch con-
nector terminals No. 1 to No. 3.
4. Turn the ignition switch ON (II).
5. Measure voltage between ECM
connector terminals B4 and
A26.
Is there voltage?
Repair open in the wire
between the ECM (B4) and
the neutral switch.
Repair open in BLK wire
between the neutral switch
and G101 (located at right mid-
dle of engine).
Check for a short in the wire
(NTSW line):
1. Turn the ignition switch OFF.
2. Disconnect the ECM connec-
tor B (16P) from the ECM.
3. Disconnect the 3P connector
from the neutral switch.
4. Check for continuity between
ECM connector terminal B4
Is there continuity?
Replace neutral switch (see
section 13).
Substitute a known-good ECM
and recheck (see page
for immobilizer information). If
prescribed voltage is now
available, replace the original
ECM.
Replace the neutral switch (see
section 13).
Repair short in the wire between
the ECM (B4) and the neutral
switch.
11-39