Electrical Troubleshooting ('99 - 00 Modelsl
The O/D OFF indicator light doos
not come on when the ignition
switch i3 tiBt tulned ON {lll. {lt
should come on lor about two
seconds and then go outl
Check the O/D OFF Indicatol
Light:1. Turn the ignition switch ON (ll).
2. Shift to E position, and Pressthe Over-Drive (O/D) switch.
Chock lor looae t.rmin.l tit in tho
PCM connoctor3. lf nocesstrY,
substitute a known'good PCM
and r.chock.
Does the O/D OFF indicator
light come on?
Ch€ck O/O IND lor an OPen Cir-
cuit:1. Turn the ignition switch OFF
2. Disconnect the B (25P) con'
nector Irom the PCM.
3. Disconnect the 14P connector
from the gauge assemblY.
4. Check {or continuity between
the 819 terminal and the No.
6 terminal of the gauge
assembly 14P connector.
Replir open in the wiro botween
the 819 terminal and gauge
.ssemblY | 4P connector.ls there continuitY?
Check for a fauhv O/o OFF indi'
cator light bulb or . laulty gluge
a3sembly printed circuit bo.rd.
Troubleshooting Flowchart - o/D oFF Indicator Light Does Not Gome On
A (32Pt
PCM CONNECTORS
B t25Pl c (31
Wire side oI lemale terminals
a
c (3rPt
GAUGE ASSEMBLYCONNECTOR I14P)O,/D IND ILT BLU}
14-131
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Electrical Troubleshooting ('gg - 00 Modelsl
Troubleshooting Flowchart - O/D OFF Indicator Light On Constantly
The O/D OFF indicator light is onconstanllv whenever the ignitionswitch is ON {ll),
Check the O/D OFF IndicatorLighti'1. Turn the ignition switch OFF.2. Disconnect the B (25P) con-nector from the PCM.3. Turn the ignition switch oN flt).
Does the O/D OFF indicatorlight come on?
Fepair short to ground in lhewire between the B'19 terminaland the gauge aasombly 14pGOnnectot,
14-132
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Troubleshooting Flowchart - O/D OFF Indicator Light Does Not Come On
Even Though O/D Switch ls Pressed
PARK PIN/O/D SWITCH CONNECTOR
PCM CONNECTORS
Wire side of female termanals
Terminalside of male terminals
O/D SW (PNKI
PARK PIN/o/D swtTcHCONNECTOR
(cont'd)
The O/D OFF indicator light doesnot come on ev€n though theOver-Driv6 lO/Dl 3witch ispre$ed in E position. lThe o/oOFF indicatol light come onwh6n the ignition switch is fir3tturned on tor two seconds, then
9o out.l
Check the Over-Drivs {O/D) Switchal lhe Switch Connector:1. Turn the ignition switch OFF.2. Disconnect the park pin/O/D
swrtch connector.3. Check for continuity betweenthe No. 1 and No.2 terminalsof the switch connector whalepress ing the switch, andwhen released at.
Check lor loose torminallit in theO/O switch connestor. lf termi-na13 are OK, replace the O/Dswitch and pa]k pin switch as ase.t lsee p.go l+1511.
ls there continuity whilepressing the switch, and no
continuity when released it?
Check O/D Switch fol an OpsnCircuit:1. Disconnect the D (16P) connector from the PCM.2. Check for continuity betweenthe D8 terminal and the No. 1terminal o{ the switch connec'tor,
Ropair open in the wire batweanthe D8 te.minal and the park
pin/O/D Bwhch connocto..
A {32P1B l25Plc (31P)
To page 14-134
14-133
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A/T Gear Position Indicator
1.
f nput Test -'97 - 98 Models
Remove the gauge assembly from the dashboard (see section 20). and disconnect the 14P connector from the gauge
assemblv (see section 23),
Inspect the connector and socket terminals to be sure 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 following input tests at the 14P connector.- lf I 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,
GAUGE ASSEMBLY 14P CONNECTOR
Wire side of female terminals
CavityWirs
ColorTest ConditionTest: Desir€d ResultPossible Cause
{lf rosult is not obtainod)
YEL
lgnition switch ON (ll)Check for voltage to ground:
There should be battery voltage,
. Blown No. 25 (7.5 A) fuse in the
under-dash fuse/relay box. An open in the wire
RE D/BLKCombination light
switch ON and dash
lights brightness con-
trol dial on full bright
Check for voltage between No. 2
and No. 3 terminals;
There should be battery voltage.
Blown No. 47 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty combination Iight switch
Faulty dash iight brightness
controller
An open in the wire
RED
4BLUShift lever in ECheck for continuity to ground:
There should be continuity.
NOTE: There should be no continu-
ity in any other shift lever position.
' Faulty Ay'T gear position switch. An open in the wireBRNShift lever in E
7YELShift lever in @
8BLKUnder all conditionsCheck for continuity to ground:
There should be continuity
. Poor ground {G401). An open in the wire
9GRN/BLK
lgnition switch ON {ll)
and shift lever in any
position except E
Check for voltage to ground:
There should be battery voltage
for two seconds after the ignition
switch is turned ON {ll), and less
than 1 V two seconds later,
' Faulty PCM. An open in the wire
10GRNShift lever in ECheck for continuity to ground:
There should be continuity.
NOTE: There should be no conti-
nuity in any other shift lever posi-
UOn.
. Faulty A,ff gear position switch. An open in the wire1'lREDShift lever in @
12WHTShift lever in E
BLVBLU
Shift lever in ENOTE: Do not push
the brake pedal.
14LT GRN
lgnition switch ON { ll)
and shift lever in any
position except E and
E
Check for voltage to ground:
There should be about 5 V.
. Faulty PCM. An open in the wire
14-142
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L
Input Test -'99 - 00 Models
Remove the gauge assembly from the dashboard {see section 20), and disconnect the 14P connector from the gauge
assembly (see section 23).
Inspect the connector and socket terminals to be sure they are all making good contact.
a lf the terminals are bent. loose, or corroded. repair 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.
GAUGE ASSEMBLY 14P CONNECTOR
Wire side of female terminals
CavityWire
ColorTest ConditionTest: Desired ResuhPossible Caus6
{lf resutt is not obtainod)
1YEL
lgnition switch ON (ll)Check for voltage to ground:
There should be battery voltage.
. Blown No.25 (7.5 A) fuse in the
under-dash fuse/relay box. An open in the wire
2RE D/BLK
Combination light
switch ON and dash
lights brightness con-
trol dial on full bright
Check for voltage between No. 2
and No.3 terminals:
There should be battery voltage.
Blown No. 47 {7.5 A) fuse in the
under-dash fuse/relay box
Faulty combination light switch
Faulty dash light brightness
controller
An open in the wire
5RED
BRNShift lever in ECheck for continuity to ground:
There should be continuity.
NOTE: There should be no continu-
ity in any other shift lever position.
. Faulty A/T gear position switch. An open in the wire7YELShift lever in E
'10BLUShift lever in E
LT BLU
lgnition switch ON (ll),
shift lever in E. and
Over-Drive is OFF bypressing O/D switch.
Check for continuity to ground:
There should be continuity.
Faulty O/D switch
Faulty A/T gear position switch
Faulty PCM
An open in the wire
8BLKUnder all conditionsCheck for continuity to ground:
There should be continuity
. Poor ground (G401)
. An open in the wire
9a:FI\|/Et| ta
lgnition switch ON (ll)
and shift lever in any
position except E
Check for voltage to groundl
There should be battery voltage
for two seconds after the ignition
switch is turned ON (ll). and less
than 1 V two seconds later.
. Faulty PCM. An open in the wire
11REDShift lever in SCheck for continuity to ground:
There should be continuity.
NOTE: There should be no conti-
nuity in any other shift lever posi-
Iton.
. Faulty A/T gear position switch. An open in the wire12WHTShift lever in E
BLI(BLU
Shift lever in ENOTE: Do not push
the brake pedal.
14LT GRN
lgnition switch ON (ll)
and shift lever in any
position except E and
E
Check for voltage to groundl
There should be about 5 V,
. Faulty PCM. An open in the wire
14-143
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1?
4678
CavityWire
ColorTest CondhionTost: Desired RosultPossible Cause(lf result is not obtainedl
1WHT/BLU
lgnition switch turned
to ACC (l), ignition key
pushed all the way in
Check for voltage to ground:
There should be battery voltage.
Blown No. 48 {30 A} fuse in the
under-hood fuse/relay box
Blown No.33 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty steering lock assembly
{key interlock solenoid)
An open in the wire
YEL
lgnition switch ON (ll)Check for voltage to ground:
There should be battery voltage.
Blown No.25 (7.5 A) fuse in the
under-dash fuse/relay box
An open in the wire
YEUBLK
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
Faulty shift lock solenoid
An open in the wire
4BLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G401)
. An open in the wire
5WHT
lgnition switch turned
to ACC (l), ignition key
pushed all the way in
Check for voltage to ground:
There should be battery voltage.
Blown No.48 (30 A) fuse in the
under-hood fuse/relay box
Blown No. 33 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty steering lock assembly(key interlock switch)
An open in the wire
BLI(BLU
Shift lever in ECheck for continuity to ground:
There should be continuity,
Faulty Ay'T gear position switch
Poor ground (G101)
An open in the wire
8WHT/BLK
Shift lever in @ and
pulled toward steering
wneel
Check for continuity to ground:
There should be continuity.
Faulty park pin switch
Shon to ground
Shift lever in ECheck for continuity to ground:
There should be no continuity.
Wire side of female terminals
Reconnect the interlock control unit 8P connector.
14-145
7WHT/RED
lgnition switch ON (ll)
and brake pedal
presseo
Check for voltage to ground:
There should be 1 V or less.
Faulty brake switch
Faulty throttle position (TP)
sensor
Faulty PCM
An open in the wire
Faulty interlock control unit
lgnition switch ON (lll,
brake pedal and accel-
erator pedal pressed at
the same time
Check for voltage to ground:
There should be baftery voltage,
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ABS Control Unit Terminal Arrangement
ABS CONTROL UNIT 26P CONNECTOR
Wire side of female terminals
TeiminalnumbelWiiecolorTerminal3ignTeiminalnamglDescription
Voltrge
tdminalsCondhions(lgnition Switch ON llll)Output voltago
1GRNn/VHTPCOM(Primary
common)
Power source for the solenoidvalve and pump motor.1-GNDON6
ONOV
OFFAC:3-6V
2BLI(WHTSCOM(Secondary
common)
Power source for the solenoid2-GNDOFF
lConnect the SCS seNice] connector IApprox.3 V
BLVBLU(lgnition 2)Detects ignition switch 2signal. (System activate signal)3-GNDBattery Voltage
4BLUA/ELRRO(Rear-right 0)Detocts right-rear wheelsensor srgnat.When the wheel isturned at 1 turn/second.
53 mV or above ondigitaltester (ACrange) {Beference)150 mvtrp or aboveon oscilloscope
GRYRLO(Rear-left 0)Detects left-rear wheel sensorsrgnat.6-19
8GRNFRO(Fronr-right 0)Detects right-front wheelsensor signal.8-21StopsApprox.2.5 VSTOP
{Stop)Detects bfake switch signal.(Prevents unnecessary ABS operation)9-GNDBrake pedal pressed.Battery Voltage
Brake Dedal released.OV
10BRN^/VHTFLO(Front-left 0)
Detects left-front wheel sensorsrgnal.
10-23
When the wheel isturned at 1 turn/second.
53 mV or above ondigitaltester lACrange) (Reference)
150 mvpp or aboveon oscilloscope
StopsADprox. 2.5 V
YELRL-oUT(Rearleft outlet)
Drives left-rear outlet solenoid12.GNDONONOV
OFFAC:3-6V
13RED^/vHTRR.IN(Rear-right
inlet)
Drives right-rear inlet solenoid13.GNDOFF
lConnect the SCS service\ connector IApprox. 3 V
14WHT/GRNB1(Baftery 1)Power source for the solenoidvalve and pump motor.14.GND
Every timeBattery Voltage82(Battery 2)Power source for the solenoidvalve and pump motor.15-GND
16BLKGND2(Ground 2)Ground for the ABS controlunit.16-GNDBelow 0.3 V
't7GRN/YELRR1(Rear-right 1)Detects right-rear wheelsensor signal.'t7 -4
When the wheel is turnedat l turn/second,
53 mV or aboveon digitaltester(AC range)(Reference) 150mVp-p or aboveon oscilloscope
19LT BLURL1(Rearieft 1)Detects left-rear wheel sensorsignal.19-6
GRN/BLKFR1(Front-right 1)Detects right-front wheelsensor srgnat.21-8
23GBN/ORNFL1{Front-left 1}Detects left-front wheel sensorsagnal.23-10StopsApprox. 2.5 V
REDRLI N(Rear-left inlet)
Drives left-rear inlet solenoid
25,GND
ON
=
-9ONOV
AC:3-6V
OFF
/Connect the SCS service] conneclor IApprox. 3 V
26BLKGND3(Gtound 3)Ground tor the ABS controluntI.26-GNDBelow 0.3 V
19-34
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Troubleshooting
ABS lndicator Does Not Come On
The ABS indicator does notcome on when ignition switch isturnod ON lll).
check the METER {7.5 A} fuse inthe underCash fuse/relay box,and reinstaltthe fuse if it is OK.
Check for an open in the lcl ch-cuil:1. Disconnect the gauge assem-bly 5P connector.2. Turn the ignition switch ON (ll).
3. Measure the voltage betweenthe gauge assembly 5P con-nector terminal No. 5 andbody ground.
. Repair open in the wire betweenlhe METER {7.5 A) luse and thogauge assembly.. Reolece the under-dash fuse/relay box. (Opon circuit insidethe box.)
ls there battery voltage?
Check the ABS indicator bulb inthe gauge assembly.
Replace the ABS indicator bulb.
Check for a short to power in theWALP circuit:Measure the voltage between thegauge assembly 5P connectorterminal No. 1 and body ground.
Sepair short to power in the witeb€tween the gaug€ assemblyand the ABS control unil.ls there battery voltageT
Reolace the tuse and recheck.
(To page 19 42)
GAUGE ASSEMBLY 5P CONNECTOR
Wire side of female terminals
(cont'd)
19-41
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