1999 HONDA CIVIC ac system

Interlock System
Control Unit Input Test
1. Disconnect the 8P connector from the interlock con-trol unit.
2. Inspect the connector and socket terminals to besure they are all making good contact.. lf the terminals are bent, loose or corroded, repairthem as necessary, and recheck the system.. lf the terminals look OK, make the followinginput tests at the connector.- lf a test indicates a problem, find and correctthe cause, then recheck the system.- lf all the input tests prove OK, substitute aknown-good control unit, and recheck the sys-tem. lf the check is OK, the control unit mustbe faulty; replace it.
NOTE: lf the shift lock solenoid clicks when theignition switch is turned ON {ll) and you step on thebrake pedal (with the shift lever in E), the shift locksystem is electronically normal; if the shift leve.cannot be shifted from E], test the Aff gear position
switch, park pin switch, and see section 14.
Key Interlock System:
CavityWireTest condition
Reconnect the 8P connector to the interlock control unit.
Shift Lock System:
Cavity WifsTest condition
INTERLOCKCONTROL UNIT
Test: Desired result
Test: Dgsired result
Wire side offemale terminals
Possible cause if result is not obtained
Possible cause if result is not obtained
WHT/BLU
lgnition switch turned toACC (lland key pushed inCheck for voltage to groundiThere should be baftery voltage.Blown No. 48 (30 A) fuse in the underhood fuse/relay boxBlown No. 33 (7.5 A) fuse in the underdash fuse/relay boxFaulty steering lock assemblylkey interlock solenoid)An open in the wire
5WHT
BLKUnder all conditionsCheck for continuity to ground:There should be continuity.
' Poor ground (G401, G402). An open in the wire
6BLK./BLUShift lever in ElCheck for continu;ty to ground:There should be continuity.Poor ground (G401, G402)Faulty Ay'T gear position switchAn open in the wire
2YELlgnition switch ON lll)Check for voltage to ground:There should be banery voltage.
. Blown No. 25 (7.5 A) fuse in the under,dash fuse/relay box. An open in the wire
3YEUBLK
lgnition swirch ON (ll)Check for voltage to ground:There should be baftery voltage.Blown No. 25 (7.5 A) fuse in the under-dash fuse/relay boxFaulty shift lock solenoidAn open in the wire
6BLI(BLUShift lever in ICheck for voltage to ground:There should be 1 V or less.Poor ground (G401, G402)Faulty A,/T gear position switchAn open in the wire
7WHT/RED
lgnition switch ON lll)Brake pedaldepressedCheck for voltage to ground:There should be 1 V or less.Blown No. 52 (15 A) Iuse in the underhood fuse/relay boxFaulty PCMFaulty brake switch (see section 1l)Faulty throttle position {TP) sensor(see section 1'l )An open in the wire
lgnition switch ON (ll)Brake pedalandaccelerator depressed atthe same time
Check for voltage to ground:There sho(Jld be battery voltage.
23-146

Interlock System
Park Pin Switch Test
1, Remove the front console (see section 2Ol.
Disconnect the 4P connector from the park pinswitch.
Check for continuity between the No. 3 and No. 4terminals with:- the shift lever any position other than E, or- the push button pushed in E.There should be continuity.
Check for continuity between the No. 3 and No. 4terminals with the shift lever in E and the push but-ton released. There should be no continuiw. lf nec-essary, replace the park pin switch.
NOTE: Park pin switch 4p connector No. 1 and No.2terminals are lor Ay'T gear position console light.refer to the circuit diagram on page 23-1S0.
23-14A

A/T Gear Position Indicator
1.
Indicator Input Test
Remove the gauge assembly from the dashboard (see page 23 135), and disconnect the 14p connector from rne gaugeassemblv.
Inspect the connector and socket terminals to be sure they are all making good contact.
. lf the terminals are bent. loose or corroded, repa ir them as necessary, and recheck the system.. lf the terminals look OK, make the following input tests at the 14p connector.- lf a test indicates a problem, find and correct the cause, then recheck the system.- lf all the input tests prove OK, but the indicator is faulty, replace the printed circuit board.
+1: Not used'2: AIT'3i CVT
l{P CONNECTOR "A"
REOBLU8RN
AIMA3A4A6
A8A9A10All412A13414
GRNLTBLK
GAUGE ASSEMBLY
23-152

A/T Gear Position Indicator
A/T Gear Position Switch Test
1. Remove the front console (see section 2O).
2. Disconnect the 14P connector from the A/T gear position switch.
3. Check for continuity between the terminals in each switch position according to the table.
' Move the shift lever back and forth without pushing the shift lever at each switch position, and check for continuitywithin the range of free play of the shift lever.' lf there is no continuity within the range of free play, adjust the position of the switch as described on the nextpage.
Terminal side of male terminals
A/T Gear Position Switch
+ 1 : With cruise controlsystem
23-154
Eack - upLight SwitchNeutralPosition Switch

Integrated Control Unit
Input Test
SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the SRSsection {24) before performing repairs or service.
1. Remove the driver's dashboard lower cover and knee bolster (see section 20),
2. Disconnect the 10P connector from the integrated control unit.
3. Remove the integrated control unit from the under,dash fuse/relay box.
4. lnspect the connector and socket terminals to be sure they are all makjng good contact.
. lf the terminals are bent, loose or corroded, repair them as necessary, and recheck the system..lftheterminalslookOK,makethefollowinginputtestsattheconnectorandthefuse/relayboxsocket.
- lf any test indicates a problem, find and correct the cause, then recheck the system.- lf all the input tests prove OK, the control unit must be faulty; replace it.
INTEGRATED CONTROL UNIT
lOP CONNECTOR
Wire side otfemale terminals
23-158

All Systems:
Cavity Wire
Cavity Wire
Intelmittent Wiper System:
Test condilion
Test condition
Test: Desired resultPossible cause il rgsull is not obtained
Test: Desired resultPossible cause if result is not obtained
Al4BLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G401, G402). An open in the wire
A9
Under all conditionsCheck for voltage to ground:
There should be battery voltage.
. Blown No. 43 (7.5 A) fuse in the
under-hood fuse/relay box
. An open in the wire
A6
lgnition switch ON (ll)Check for voltage to ground:
There should be baftery voltage.
. Blown No. 25 (7.5 A) fuse in the
under-dash fuse/relay box. An open in the wire
B1
82
BLU/BLK
and
BLU,^/VHT
lgnition switch ON (ll),
and windshield wiper
switch at OFF or INT
Check for continuity between the
BLU/BLK and BLU/WHT terminals:
There should be continujty.
Blown No. 26 {20 A) fuse in the
under-dash fuse/relay box
Faulty windshield wiper switch
Faulty windshield wiper motor
An open in the wire
B3YEUBLU
lgnition switch ON (ll),
and windshield wiper
switch at INT
Check for voltage to ground:
There should be battery voltage.
Blown No.26 (20 A) fuse in the
under-dash fuse/relay box
Faulty windshield wiper switch
An open in the wire
*A5lgnition switch ON (ll)Check tor voltage to ground:
There should be battery voltage.
. Blown No.26 (20 A) fuse in the
under-dash fuse/relay box. An open in the wire
WHT/BLK
lgnition switch ON { ll),
and windshield washer
switch ON
Check for voltage to ground:
There should be battery voltage.
. Faulty windshield washer switch
. An open in the wire
*: With combined wiper'washer operatlon
{-(cont'd)

Integrated Gontrol Unit
Input Test (cont'dl
A8--------.--all
Key-in/Seat Belt R€mind€r, Lights-on Reminder Systom:
Cavity WireTest condhion
Bulb Check System (Brako System Light):
Cavity WireTest condilion
Tost: D€sirod r€guh
T6st: Dosirad result
Possible cause if result is not obtained
Possibls cause if rasuft b not obtainod
A8
Combination light
switch ON
Check for voltage to ground;
There should be battery voltage.
Blown No.30 (7.5 A)fuse in the
under-dash fuse/relay box
Faulty combination light switch
An open in the wire
B7RED/BLU
lgnition switch ON (ll),
and driver's seat belt
switch unbuckled
Check for voltage to ground:
There should be 1 V or less.
Poor ground (G552)
Faulty seat belt switch
An open in the wire
B9GRNDriver's door openCheck for voltage to ground:
There should be 1 V or less.
. Faulty driver's door switch. An open in the wire
Bl0BLU/RED
lgnition key inserted
into the ignition key
switch
Check for voltage to ground:
There should be 1 V or less.
Poor ground (G401. G402)
Faulty ignition key switch
An open in the wire
A4GRN/RED
lgnition switch ON {ll),
brake fluid reservoir
full, and parking brake
tever oown
Connect to ground: Brake system
light should come on.
Blown No.25 (7.5 Alfuse in the
under-dash fuse/relay box
Blown brake system light bulb
An open in the wire
A13BLUA/1r'HT
lgnition switch at
START (III)Check for voltage to ground:
There should be battery voltage.
Blown No.31 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty starter cut relay
An open in the wire
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Lighting System
Component Location Index
DAYTIME RUNNING LIGHTSRESISTOR {Canada)Test, page 23 167
DAYTIME RUNNING LIGHTS
CONTROL UNIT (Canadal
Input Test, Page 23 166*HEADLIGHT
Adiustment, page 23-168Replacement, page 23-167
SIGNAL LIGHTReplacement, page 23 167
HIGH MOUNT BRAKE LIGHT
Replacement, page 23-177
LICENSE PLATE LIGHTS
Replacement, Page 23'174
INNER TAILLIGHTReplacement, page 23-169
OUTER TAILLIGHTReplacement, page 23 I69
*: Headlight and front parking/front turn signal light cannot be separated.(cont'd)
23-161