Dtc P0116: Ect Sensor Range/Performance Problem; Dtc P0117: Ect Sensor Circuit Low Voltage - Honda S2000 Service Manual

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0116: ECT Sensor Range/Performance
Problem
NOTE: lf DTC P0117 and/or Po'l'18 are stored at rhe
same time as DTC P0116, troubleshoot those DTCS first,
then reckeck for DTC P0116.
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in neutral) until the radiator fan comes on,
then let it idle.
2. Check the ECT with the scan toot.
ts 176 212'F (80- 100'C)or 0.47 0.78 V
indicated?
YES Intermiftent failure, system is OK at this time.
Check the thermostat and the cooling system.I
NO Check the thermostat and the cooling system.
lf they are OK, replace the ECT sensor.l
11-48
DTC P0117: ECT Sensor Circuit Low Voltage
1. Turn the ignition switch ON (ll)
2. Check the ECT with the scan tool.
ls 302"F (150"C) or higher (or H-Limit in Honda
mode of PGM Tester) or 0 V indicated?
YES- Go to step 3.
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose wires at the
E C T s e n s o r a n d a t t h e E C M . I
3. Disconnect the ECT sensor 2P connector,
4. Check the ECT with the scan tool.
ls 302'F (150"C) or higher (ot H-Limit in Honda
mode ot PGM Tester)or 0 V indicated?
YES Go to step 5.
NO Replace the ECT sensor.l
Turn the ignition switch OFF,
Disconnect the ECM connector C (31P).
Check for continuity between ECT sensor 2P
connector terminal No. 2 and body ground.
5 .
6.
1 .
ECT SENSOB 2P CONNECTOR
W i r e s i d e o f f e m a l e t e r m i n a l s
ls there continuity?
YES Repair short in the wire between the ECM
( C 2 6 ) a n d t h e E C T s e n s o r . l
NO Substitute a known-good ECM and recheck
(see page 11-5). lf normal ECT is indicated, replace
t h e o r i g i n a l E C M . t