Honda NC700XA Service Manual page 764

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2. First Transponder Key Inspection
Turn the ignition switch ON with the spare transponder key and check the immobilizer indicator.
The indicator should came on for 2 seconds then go off.
Is the indicator go off?
YES
NO
3. Diagnostic Code Inspection
Perform the diagnostic code indication procedure (page 23-6).
Check that the immobilizer indicator comes on then it starts blinking.
Is the indicator brinks or stay lit?
BRINKS–Read the diagnostic code (page 23-7).
STAY LIT–GO TO STEP 4.
4. TXD/RXD Line Inspection between The ECM/PCM and Combination Meter
Check the TXD/RXD line (Red/blue wire) between the ECM/PCM 33P connector and combination meter
16P (Gray) connector (page 23-10).
Is there continuity?
YES
NO
5. CKP sensor Line Inspection
Check the CKP sensor lines (Yellow, White/yellow and Green/orange wires) between the ECM/PCM 33P
connector and CKP sensor 2P (Red) connector (page 23-11).
Is there continuity?
YES
NO
Diagnostic code
1. Immobilizer Receiver Power Input Line Inspection
Check the power input line (Yellow/red wire) at the immobilizer receiver 4P (Black) connector (page 23-12).
Is there approx. 5 V?
YES
NO
2. Immobilizer Receiver Ground Line Inspection
Check the ground line (Green/yellow wire) at the immobilizer receiver 4P (Black) connector (page 23-12).
Is there continuity?
YES
NO
3. Immobilizer Receiver Signal Line Inspection 1
Check the signal line (Pink wire) at the immobilizer receiver 4P (Black) connector (page 23-12).
Is there approx. 5 V?
YES
NO
4. Immobilizer Receiver Signal Line Inspection 2
Check the signal line (Blue wire) between the immobilizer receiver 4P (Black) connector and ECM/PCM
33P connector (page 23-12).
Is there continuity?
YES
NO
– Faulty first transponder key
– GO TO STEP 3.
– GO TO STEP 5.
– Open circuit in Red/blue wire
– • Open circuit in Yellow wire
• Open circuit in White/yellow and/or Green/orange wire
– Faulty ECM/PCM
is indicated (Code signals cannot send or receive)
– GO TO STEP 2.
– Open or short circuit in Yellow/red wire
– GO TO STEP 3.
– Open circuit in Green/yellow wire
– GO TO STEP 4.
– Open or short circuit in Pink wire
– • Short circuit in Blue wire
• Faulty immobilizer receiver.
– Open circuit in Blue wire
IMMOBILIZER SYSTEM (HISS)
23-9