Dtc 21-1 O2 Sensor - Honda PCX150 2013 Service Manual

DTC
• Before starting the inspection, check for loose or
poor contact on the
02
sensor cap connector and
recheck the DTC.
1. 02 Sensor Line Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the following:
- ECM 21 P (Gray) connector
- 02 sensor cap (page 4-53)
Check the continuity between the ECM 21 P (Gray)
connector [1] of the wire harness side and 02 sensor
cap terminal [2].
CONNECTION:
Oz sensor cap terminal - 85 (Black/orange)
STANDARD: Continuity
TOOL:
Test probe, 2 pack 07ZAJ-RDJA 110
Is there continuity?
YES - GO TO STEP 2.
NO - Open circuit in the Black or Black/orange
wire
2. 02 Sensor Line Short Circuit Inspection
With the ECM 21 P (Gray) connector disconnected,
check for continuity between the 02 sensor cap
terminal [1] and ground.
CONNECTION: 02sensor cap terminal - Ground
STANDARD: No continuity
TOOL:
Test probe, 2 pack 07ZAJ-RDJA 110
Is there continuity?
YES - Short circuit in the Black or Black/orange
wire
NO - GO TO STEP 3.
3.
02
Sensor Inspection
Replace the 02 sensor with a known good one
(page 4-53).
Clear the DTC (page 4-12).
Start the engine and warm the engine up to coolant
temperature is 80 °C (176 °C).
Test-ride the scooter and check the 02 sensor with
the MCS tester.
Is the DTC 21-1 indicated?
YES - Replace the ECM with a new one and
recheck.
NO - Faulty original 02 sensor
PGM-FI SYSTEM
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