Honda NSS250S Manual page 215

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MIL 8 BLINKS (TP SENSOR)
1. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 6-22).
Is the sensor unit power line normal?
YES – GO TO STEP 2.
NO – Replace or repair the abnormal circuit.
2. TP Sensor Output Voltage Inspection
Turn the ignition switch ON and engine stop
switch " ".
Measure the TP sensor output voltage at the test
harness terminals.
CONNECTION: 9 (+) – 10 (–)
STANDARD:
0.29 – 0.71 V (throttle fully closed)
4.13 – 4.76 V (throttle fully opened)
Is there standard voltage?
YES – • Intermittent failure
• Loose or poor contact on the PCM
connector
NO – GO TO STEP 3.
3. TP Sensor Output Line Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the PCM 33P (Black) connector.
Disconnect the sensor unit 5P (Black) connector.
Check the continuity between the sensor unit 5P
connector of the wire side and ground.
CONNECTION: White/red – Ground
Is there continuity?
YES – Short circuit in White/red wire
NO – GO TO STEP 4.
4. TP Sensor Voltage Input Line Open Circuit
Inspection
Check the continuity between the sensor unit 5P
connector of the wire side and test harness.
CONNECTION: 9 – White/red
Is there continuity?
YES – • Faulty sensor unit (TP sensor)
• Replace the PCM with a known good
one, and recheck.
NO – Open circuit in White/red wire
FUEL SYSTEM (PGM-FI)
TEST HARNESS PIN BOX
(9)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
(9)
TEST HARNESS PIN BOX
(10)
White/red
White/red
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