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S y m p to m :
*HEATED S EAT RELAY N OT EN ERGIZED WITH IGN ITION ON
H E ATE D SE AT RE LAY
F USE D IGNITION SWITCH OUTP UT CIRCUIT OP E N
H E ATE D SE AT RE LAY CONTROL WIRE
BODY CONTROL MODULE
P CM NOT ACTIVE ON TH E BUS
TES T
1
Wit h t h e DRBIII in Body Syst em Test r ea d t h e P CM st a t u s.
Is t h e P CM a ct ive on t h e BUS?
Yes
No
2
Rem ove t h e H ea t ed Sea t Rela y fr om t h e P ower Dist r ibu t ion Cen t er.
Tu r n t h e ign it ion on .
Usin g a 12-volt t est ligh t con n ect ed t o gr ou n d, ch eck t h e F u sed Ign it ion Swit ch
Ou t pu t cir cu it ca vit y 67 of t h e r ela y socket .
Does t h e t est ligh t illu m in a t e br igh t ly?
Yes
No
3
In st a ll a kn own good r ela y in pla ce of t h e H ea t ed Sea t Rela y.
Does t h e syst em n ow oper a t e cor r ect ly?
Yes
No
4
Tu r n t h e ign it ion off.
Rem ove t h e H ea t ed Sea t Rela y fr om t h e P ower Dist r ibu t ion Cen t er.
Discon n ect t h e Body Con t r ol Modu le C3 con n ect or.
Mea su r e t h e r esist a n ce of t h e H ea t ed Sea t Rela y Con t r ol cir cu it bet ween t h e H ea t ed
Sea t Rela y con n ect or a n d t h e Body Con t r ol Modu le C3 con n ect or.
Is t h e r esist a n ce below 5.0 oh m s?
Yes
No
P OS S IB LE CAU S ES
ACTION
→ Go To 2
→ Refer t o sym pt om No Respon se t o P CM in t h e Com m u n ica t ion
ca t egor y.
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Go To 3
→ Repa ir t h e F u sed Ign it ion Swit ch Ou t pu t cir cu it for a n open .
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Repla ce t h e H ea t ed Sea t Rela y.
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Go To 4
→ Repla ce t h e Body Con t r ol Modu le.
P er for m BODY VE RIF ICATION TE ST - VE R 1.
→ Repa ir t h e H ea t ed Sea t Rela y Con t r ol wir e for a n open .
P er for m BODY VE RIF ICATION TE ST - VE R 1.
ELECT RI CALLY H EAT ED SY ST EM S
245
AP P LICAB ILITY
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