Acura 2002 RSX Service Manual page 610

Automatic Tra nsm ission
DTC Troubleshooting (cont,d)
DTC P07_20:
Problem in Countershaft Speed
Sensor Circuit
NOTE: Record all freeze data and review General
Troubleshooting Information (see page 14,3) before
you troubleshoot.
1 . T u r n t h e i g n i t i o n s w i t c h O N { l l ) .
2. Check whetherthe OBD ll scan tool indicates the
code for the manifold absolute pressure (MAp)
sensor.
Does the OBD ll scan tool indicate the code for the
MAP sensot?
YES Perform the troubleshooting flowchan for
the indicated N4Ap sensor (see page l1-63).
Recheck for code PO72O after troubleshooting. t
NO Go to step 3,
3. Turn the ignition switch OFF.
4. Disconnect PCful connector A (31p).
5. Check for continuity between pCM connector
terminals A23 and body ground, and between A24
and body ground.
PCM CONNECTOR A {31P)
2 3
5 6 t 7
U
E
I
t 0 11 2
15
I
2A 21
LGl (BRN/YELI
o
o
Wire side ot female terminals
LG2 (BRN/YELI
ls there continuity?
YES Go to step 6.
NO Repair open in the wires between pCM
c o n n e c t o r t e r m i n a l s A 2 3 a n d g r o u n d ( G 1 0 1 ) ,
betlveen A24 and ground (G'l01), and repair poor
g r o u n d ( G 1 0 1 ) . I
14-78
6.
7 .
8 .
9 .
Connect PCM connector A (31p).
Disconnect the countershaft speed sensor
connector.
Turn the ignition switch ON {ll).
Measure the voltage between the No. 1 terminal of
the countershaft speed sensor connector.
COUNTERSHAFT
SPEED SENSOR
CONNECTOR
1 2 3
vccl
(YEL/REDI
Wire side of lemale terminals
ls there about 5 V ?
YES - co to step 10.
NO Go to step 20.
10. Turn the ignition switch OFF.