Dtc P0122: Tp Sensor Circuit Low Voltage - Honda S2000 Service Manual

PGM-FI System
DTC Troubleshooting (cont'dl
DTC P0122: TP Sensor Circuit Low Voltage
1. Turn the ignition switch oNfll)
2. Check the throttle position with the scan tool.
Is there about 670 when the throttle is f ully closed
and about 90% when the throttle is fully opened?
YES Intermittent failure, system is OK at this time,
Check for poor connections or loose wires at the TP
s e n s o r a n d a t t h e E C M . I
NO Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnectthe TP sensor 3P connector.
5 . 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 ) .
6. Measure voltage between TP sensor 3P connector
t e r m i n a l s N o . 1 a n d N o . 3 .
TP SENSOR 3P CONNECTOR
SG2 {GRN/YEL)
VCC2 (YEL/BLU)
Wire side ol female terminals
ls there about 5 V?
YES Go to step 7.
NO Go to step 13.
Turn the ignition switch OFF.
7 .
1 1 - 5 0
1 0 .
8. At the sensor side, measure resistance between TP
sensor 3P connector terminals No. 1 and No. 2 with
the throttle {ully closed.
TP SENSOR 3P CONNECTOR
Terminal side of male terminals
l s t h e r e a b o u t 0 . 5 0 . 9 k Q ?
YES Go to step 9.
NO Replace the throttle body.t
Measure resistance between TP sensor 3P
c o n n e c t o r t e r m i n a l s N o . 2 a n d N o . 3 w i t h t h e
throttle fully closed.
9 .
TP SENSOR 3P CONNECTOR
Terminal side of male terminals
ls there about 4.5 kQ ?
YES Go to step 10.
NO Replace the throttle body.t
Reconnect the TP sensor 3P connector.