Symptom:
RELAY OU TP U T VOLTAGE
Wh e n Mo n i to re d a n d S e t Co n d it i o n :
RELAY OU TP UT VOLTAGE
Wh en Mon it or ed: Ign it ion On - Con t inu ou sly.
Set Con dit ion : When t he CAB su pply volt a ge is u n der 9.4, u nder 8.8 du r ing a n ABS even t
or over 17.4 wit h veh icle speeds a bove 6 kph (4 mph ).
POSSIBLE CAUSES
IN TE RMITTE NT RE LAY OUTP UT VOLTAGE DTC
BATTE RY/CH ARGING SYSTE M FAILURE
DAMAGE D CAB/CAB HARN E SS CONNE CTOR
FUSE D OPTIONAL E QU IP ME NT RE LAY OUTP U T CIRCU IT OP EN
FUSE D B(+) CIRCUIT OP EN
GROU ND CI RCUI T OP E N
ANTI-LOCK BRAKE CONTROLLE R
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion on .
Wit h th e DRBIII",readDTCs.
Wit h th e DRBIII",eraseDTCs.
Tur n th e ign it ion off.
Tur n th e ign it ion on .
Star t t he engine.
Dr ive th e veh icle above 6 km /h (4 mph ) for at lea st 30 secon ds.
St op t h e v eh icle.
Wit h th e DRBIII",readDTCs.
Does t h e DRBIII" displa y RE LAY OU TP UT VOLTAGE ?
All
Ye s → Go To 2
No → Go To 8
2 Tur n th e ign it ion off.
Per for m a ba t t er y an d ch a r gin g syst em t est in accor da n ce wit h t h e Ser vice In for m a -
tion .
NOTE: Refer to symptom list for any problems related to the battery or
charging system.
Wer e an y pr oblem s fou n d?
All
Ye s → Repa ir a n y ch a r gin g syst em or bat t er y r ela t ed sym pt om (s) in
accor da n ce wit h t h e Service In for m a t ion .
Per for m ABS VE RIF ICATION TE ST - VER 1.
No → Go To 3
60
BRAK ES (CAB)