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Tachometer Circuit
Troubleshooting
NOTE: lf the MIL indicator is on, troubleshoot the PG lM-
Fl Droblem first.
1. Remove the gauge assembly (see page 22-52).
2. Disconnect the gauge assembly connector C (20P)
a n d t h e E C M c o n n e c t o r A ( 3 2 P )
3. Check for continuity between the gauge assembly
connector C {20P) No. 5 terminal and ECM
c o n n e c t o r A { 3 2 P ) N o . 1 9 t e r m i n a l .
CAUGE ASSEMBTY CONIVECTOF C I2OPI
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ls thete continuity?
YES Go to step 4.
NO Repair open in the BLU wire between the
g a u g e a s s e m b l y a n d t h e E c N i l . l
Check for continuity between the gauge assembly
c o n n e c t o r C ( 2 0 P ) N o . 5 t e r m i n a l a n d b o d y g r o u n d .
ls thete continuity?
Y E S R e p a i r s h o r t t o g r o u n d i n t h e B L U w i r e
between the gauge assembly and the EClvl.I
NO Go to step 5.
Reconnect the gauge assembly connector C (20P)
and the ECM connector A {32P).
Check the EPS system tot DfC 22 ot 23.
ls DTC 22 or 23 present?
YES Go to the EPS system Troubleshooting Index.
lf OK, substitute a known-good ECM and relest the
c i r c u i t . l f O K , r e p l a c e t h e E C l M . l
NO Check for continuity between the gauge
a s s e m b l y c o n n e c t o r A 1 4 t e r m i n a l a n d t h e E P S
c o n l r o l u n i t c o n n n e c t o r 8 1 2 t e r m i n a l , a n d t h e
g a u g e a s s e m b l y c o n n e c t o r C 5 t e r m i n a l a n d t h e E P S
c o n t r o l u n i t c o n n e c t o r B 5 t e r m i n a l . l f O K . r e p l a c e
the main printed circuit board in the gauge
a s s e m b l y . l
4 .
5 .
6 .
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22-55
2.
3 .
Coolant Temperature Gauge Circuit
Troubleshooting
1 . Check for PGM-Fl DTCS.
l s D T C P 0 1 1 6 , P 0 1 1 7 , o r P 0 1 1 8 i n d i c a t e d ?
Y E S G o t o t h e E C M D T C T r o u b l e s h o o t i n g I n d e x . l
NO Go to step 2.
R e m o v e t h e g a u g e a s s e m b l y { s e e p a g e 2 2 - 5 2 ) .
Disconnect the gauge assembly connecter C (20P)
and the ECM connecter A {32P).
Check for continuity between the gauge assembly
c o n n e c t o r C ( 2 0 P ) N o . 7 t e r m i n a l a n d E C M
c o n n e c t o r A ( 3 2 P ) N o . 1 t e r m i n a l .
GAUGE ASSEMBLY CONNECTOR C {2OP}
ls there continuity?
YES Go to step 5.
NO Repair open in the YEVGRN wire between the
g a u g e a s s e m b l y a n d t h e E C M . I
Check for continuity between the gauge assembly
c o n n e c t o r C ( 2 0 P ) N o . 7 t e r m i n a l a n d b o d y g r o u n d .
ls there continuity?
YES Check the output from the ECM first, if OK,
repair shon to body ground in the YEL/GRN wire
b e t w e e n t h e g a u g e a s s e m b l y a n d t h e E C M . I
N O C h e c k c o n n e c t i o n s , l f O K , r e p l a c e t h e m a i n
p r i n t e d c i r c u i t b o a r d i n t h e g a u g e a s s e m b l y . I
Wire side of female terminals
Wire side of female terminals
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Table of Contents
Troubleshooting
