Honda CBR650RA Shop Manual page 171

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5. ECM Inspection
Replace the ECM with a known good one (page 4-
76).
Connect the ABS modulator 18P (Black) connector.
Erase the DTC (page 19-26).
Test-ride the motorcycle above 20 km/h (12 mph)
for more than 20 seconds.
Stop the engine.
Check the DTC with the GST or MCS.
Is P2158 indicated?
YES
NO
P1500 (FRONT WHEEL SPEED
SENSOR SIGNAL)
1. DTC Recheck
Erase the DTC (page 4-9).
Test-ride the motorcycle above 20 km/h (12 mph)
for more than 30 seconds.
Stop the engine.
Check the DTC with the GST or MCS.
Is P1500 indicated?
YES
NO
2. ABS DTC Check
Check the ABS DTC (page 19-6).
Does the ABS modulator have any DTC?
YES
NO
3. Front Wheel Speed Sensor Signal Output Line
Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the following:
– ABS modulator 18P (Black) connector (page 19-
26)
– ECM 33P (Gray) connector (page 4-76)
Check for continuity between the wire harness side
ABS modulator 18P (Black) connector [1] and ECM
33P (Gray) connector [2].
TOOL:
Test probe
CONNECTION: White/blue – White/blue
Is there continuity?
YES
NO
– Replace the ABS modulator with a known
good one and recheck (page 19-26).
– Faulty original ECM.
– GO TO STEP 2.
– Intermittent failure.
– Follow the ABS DTC index (page 19-10).
– GO TO STEP 3.
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– GO TO STEP 4.
– Open circuit in the White/blue wire
PGM-FI SYSTEM
[1]
W/Bu
(Terminal side of the wire harness)
[2]
W/Bu
4-67