Mazda 121 Workshop Manual page 273

CONTBOL SYSTEM
F
. Open circuit in wiing lrom AJC switch to ECu terminal 10
Always baltery vollage
. A/C sulch maliunclion (Reler to Section lJ)
(elect c cool ns tan OK)
Open or shorl circuit ln wirng trom lan retay lo ECU teffnina 1B
ECU mallunction
Alwals below 1.0V (blower lan OK)
Shon circut n wiring from blower conlrol swilch to ECLJ terminal 15
Poor conneclion at ECU conneclor
ECU maltunclion
Always batlery voltage (blower fan OK)
. Open c rcuit in wirins ircm blower control swilch lo ECU lerminal lS
t.0v
llluminalion lamp ON
Op€n or shorl cncuir in wirlng trom rear window dstrosl€r swtch ro ECU
lenninal 1T
never ON
Open circuit in wir ng lrom ignition switch to rear window delroster swilch
Fear wndow defroster switch malfunction (Beler to Section T)
Always below 1.0V (Headlighls OK)
. Open or shon circuit in wiring trom headlighl relay lo ECIJ terminal 1 U
Neulfal swilch malluncton (Refer to page F-125)
Clutch switch maliunction {Beler ro page F-124)
Shon circuit ln wnino lrom ECU terminal lV to neukal or ciltch switch
Neutrai swilch mallunclion (Feler to page F-125)
Clulch swlch malfunction (Rerer to page F-124)
Open crcut n widng from ECU tenninal 1V lo neutral or clurch switch
Poor conneclion at ECU connector
Inh bilor swltch mallunction {Reler to Section K)
Short circuit wiring lrom lnhibitor switch lo ECU lerminal 1V
nhibitor swilch mallunclion (Refer lo Sectlon K)
Open orcult in wiring frorn inhibitor swrtch to ECU rerminal 1V
Poor contacl al ground terminal
Open circuit in wir ng lrom ECU to ground
Always approx 0V or approx. 2V
. Refer to Troubleshooting, Code No.02 (Reler to page F-70)
A ways battery vollage
. Open circuil wiring from lo ground
Shon circult n wiring from ECU tenninal 2K lo thrctlle sensor EC AT convol
unil (ATX), or ln aidow sensor
Poor connection at ECU conneclor
ECU mallunclion
Beow 4.5V of above 5.5V
. ECU mailuncton
F-117