Dtc Pl416: Air Pump Electric Current Sensor Circuit High Voltage - Honda S2000 Service Manual

Pulsed Secondary Air lniection System
4 .
5 .
6 .
7 .
DTC Troubleshooting (cont'd)
DTC Pl416: Air Pump Electric Current Sensor
Circuit High Voltage
1 . R e s e t t h e E C M ( s e e p a g e 1 1 - 4 ) .
2 . 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 )
3, Check for a DTC with the scan tool.
ls DTC P1416 indicated?
YES Go to step 4.
NO Intermittent failure, system is OK at this time,
Check for poor connections or loose terminals at
the air pump electrical current sensor and at the
E C M . T
Turn the ignition switch OFF.
Disconnect the air pump electrical current sensor
3P connector,
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 ) .
Nleasure voltage between air pump electrical
current sensor 3P connector terminals No. 1 and
N o . 2 .
AIR PUMP ELECTRICAL
CURRENT SENSOR
3P CONNECTOR
Wire side of female terminals
ls there about 5 V?
YES Replace the air pump electrical current
s e n s o r . l
NO Go to step 8.
r--F_}--r
l 1 1 2 l 3 l
]---T---
L_,(/r_1
vcc2
\+/
sG2
IYEL/BLU)
(GRN)
1 1 - 1 5 8
8 . Measure voltage between ECM connector
t e r m i n a l s C 1 8 a n d C 2 8 .
ECM CONNECTOR
C (31PI
sG2
{GRN/YEL)
8 I 9 r 0
I
2
4
5
11 1Z
1 4
1 1
l
1 9 I Z A I U 1 2 2
25 26 27 2
3 t t a t 3 0
vcc2
{YEL/BLU)
Wire side of lemale terminals
ls there about 5 V?
YES Repair open in the wire between the ECM
( C 1 8 ) a n d t h e a i r p u m p e l e c t r i c a l c u r r e n t s e n s o r . l
NO Substitute a known-good ECM and recheck
(see page 1 1-5). lf voltage is normal. replace the
o r i g i n a l E C M . I