Acura NSX 1991 Manual page 207

Main Menu
Troubleshooting
Troubleshooting Procedures
I. How To Begin Troubleshooting
When the Malfunction Indicator Lamp (MIL) has been reported on, or there is a driveability problem, use the appropri-
ate procedure below to diagnose and repair the problem.
A. When the MIL has come on:
1. Connect the Honda PGM Tester or an OBD-II
scan tool to the 16P Data Link Connector (DLC)
located under the glove box behind a removable
cover.
2. Turn the ignition switch ON.
3. Honda PGM Tester: Begin troubleshooting as
indicated by the tester. The DTC troubleshooting
flowcharts are not needed with the tester; follow
the tester's prompts.
OBD-II scan tool: Check the DTC and note it. Also
check and note the freeze frame data. Refer to
the Diagnostic Trouble Code Chart and begin
troubleshooting.
NOTE:
• See the OBD-II scan tool or Honda PGM Tester user's manuals for specific operating instructions.
• The scan tool or tester can read the Diagnostic Trouble Codes (DTC), freeze frame data, current data, and other
Engine Control Module (ECM) data.
• Freeze frame data indicates the engine conditions when the first malfunction, misfire or fuel trim malfunction
was detected. It can be useful information when troubleshooting.
B. When the MIL has not come on, but there is a driveability problem, refer to the Symptom Chart on page 11-42.
C. DTCs will be indicated by the blinking of the Malfunction Indicator Lamp (MIL) with the SCS service connector con-
nected.
• Connect the SCS service connector to Service Check Connector as shown. (The 2P Service Check Connector is
located under the dash on the passenger's side of the car.) Turn the ignition switch on.
OBD-II SCAN TOOL or
HONDA PGM TESTER
Table of Contents
DATA LINK CONNECTOR (16P)
SCS SERVICE CONNECTOR
07PAZ - 0010100
MALFUNCTION
INDICATOR
LAMP
(MIL)
SERVICE CHECK
CONNECTOR (2P)