Integrated Control Unit — Acura Integra III (1993-2001)

DESCRIPTION & OPERATION

WARNING

Vehicles are equipped with air bag supplemental restraint system. Before attempting any repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.

CAUTION

When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

An integrated control unit, located in the left kick panel, integrates the functions of the key-in/seat belt reminder, side marker light flasher, wiper/washer, light-on reminder, rear window defogger timer, brake system light bulb check, and engine oil pressure indicator flasher circuits.

Note. Different wires have the same color have been given a number suffix to distinguish them (for example GRN/RED1 and GRN/RED2 are not the same).

KEY IN REMINDER

When the ignition key is not removed, the key-in reminder in the integrated control unit senses ground through the closed ignition key switch. When you open the drivers door, the beeper circuit senses ground through the closed door switch. With ground at the LT BLU and GRN/BLU terminals, the beeper sounds. See WIRING DIAGRAMS .

LIGHTS-ON REMINDER

When the ignition key is turned to the OFF and removed, with the lights on, voltage is applied to the reminder circuit in the integrated control unit. When you open the drivers door, the circuit senses ground through the closed door switch.

With voltage at the "H" terminal, ground at the GRN/BLU2 terminal and no voltage at the "F" terminal, the chime sounds to remind the driver to turn off the lights. See WIRING DIAGRAMS .

OIL PRESSURE INDICATOR SYSTEM

The low oil pressure indicator light works in two ways. It will flash continuously following a momentary loss of oil pressure, or it will go on and stay on with a complete loss of oil pressure.

When the engine first starts, before oil pressure rises above 29.4 kPa (4.3 psi) current flows through the oil pressure indicator light and the oil pressure switch to ground.

With the engine running, voltage is applied to the flasher circuit of the integrated control unit. With normal oil pressure, the engine oil pressure switch is open and the low engine oil pressure indicator light does not operate. If the oil pressure switch closes momentarily (more than 0.5 second), but then opens again, terminal YEL/RED will sense ground through the switch. See WIRING DIAGRAMS . The integrated control unit will then provide and remove ground for the oil pressure warning light through terminal YEL/RED. The light will flash on and off until the ignition switch is turned to OFF.

If engine oil pressure falls below 29.4 kPa (4.3 psi) and does not increase, the engine oil pressure switch will stay closed. The low oil pressure light will go on and stay on.

COMPONENT LOCATIONS

Note. For component locations, refer to illustration. (Scheme 1)

Component	Location
Chime Module	Under Left Side Of Instrument Panel, Behind Lower Cover & Knee Bolster
Engine Compartment Fuse/Relay Block	Right Side Of Engine Compartment, Near Battery. (Scheme 1)
Engine Oil Pressure Switch	Near oil filter.
Integrated Control Unit	On Rear Of Passenger Compartment Fuse/Relay Block. (Scheme 2)
Passenger Compartment Fuse/Relay Block	Under Left Side Of Dashboard.
Seat Belt Switch	In Driver's Seat Belt Buckle.
Side Marker Flasher Relay	Integral With Integrated Control Unit.
G401	Behind Left Kick Panel.

COMPONENT LOCATIONS

Locating Engine Compartment Fuse/Relay Block. Scheme 1

Scheme 1: Locating Engine Compartment Fuse/Relay Block

INPUT TESTS

Remove the dashboard lower cover and knee bolster, then disconnect the 15-P connector from the integrated control unit. Remove the integrated control unit from the under-dash fuse/relay box. Inspect the connector and socket terminals to be sure they are all making good contact. (Scheme 2)

Make the following input tests at he harness pins. If all tests prove OK, yet the system still fails to work, replace the control unit.

Note. Several different wires have the same color. They have been given a number suffix to distinguish them (for example GRN/BLU1 and GRN/BLU2 are not the same). Do not disconnect any of the connectors on the dash fuse box except the integrated control unit.

Note. Do not disconnect any connectors on the under-dash fuse/relay box except the integrated control unit.