Separate the multi-pin connector from the control unit

Ignition control unit (arrowed)

multimeter set to the ohms x 100 scale, measure the resistance between thewhite/yellow and yellow terminals on the pulse generator coil side of the connector (see illustration).

3 Compare the reading obtained with that given in the Specifications at the beginning of this Chapter. The pulse generator coil must be renewed if the reading obtained differs greatly from that given, particularly if the meter indicates a short circuit (no measurable resistance) or an open circuit (infinite, or very high resistance).

4 If the pulse generator coil is thought to be faulty, first check that this is not due to a damaged or broken wire from the coil to the connector; pinched or broken wires can usually be repaired.

5 If the reading is satisfactory, reconnect the 4-pin connector and check the wiring between the connector and the ignition control unit. Remove the seat cowling (see Chapter 8); the ignition control unit is secured to the right-hand side of the frame (see illustration 5.3).

6Disconnect the ignition control unit multi-pin connector and identify the pulse generator terminals (white/yellow and yellow) (see illustration).Measure the resistance between the terminals of the connector as before. If the reading is not within the specifications inspect the wires for damage or breakage.

Removal

7 Remove the seat (see Chapter 8) and disconnect the battery negative (-ve) lead. Remove the right-hand frame side panel (see Chapter 8).

8 Trace the pulse generator coil wiring back from the right-hand engine cover and disconnect it at the white 4-pin connector inside the rubber boot on the right-hand side of the frame (see Illustration 4.2a).Feed the wiring through to the cover, noting its routing,

9 Drain the engine oil (see Chapter 1). Remove the engine right-hand cover as described in Chapter 2, Section 15, Step 3; the clutch cable can remain attached. Unscrew the bolts securing the pulse generator coil (see illustration).While the cover is off, examine the triggers on the timing

rotor for signs of damage and renew it if necessary (see Chapter 2, Section 16).

10 Because the pulse generator coil shares its wiring sub-harness with the oil pressure and neutral switches, these must also be disconnected. Unscrew the bolts securing the front sprocket cover and remove it and the chain guide. Unscrew the bolt securing the wiring guide and remove the guide.

11 Disconnect the neutral switch and the oil pressure switch wiring connectors (see Chapter 2, Section 5). Feed the wiring to the right-hand side of the bike, noting its routing, and remove the loom and pulse generator coil complete.

Installation

12 Installation is the reverse of removal,
noting the following:

a) Apply a suitable non-permanent locking compound to the bolts securing the pulse generator coil and tighten them securely.

b) Apply a suitable sealant to the wiring grommet and fit it into its recess (see illustration 15.37 in Chapter 2).

c) When fitting the engine cover, use a new gasket and check that the two dowels and clutch pushrod are in place. Refill the engine with oil (see Chapter 1 and Daily (pre-ride) checks).

d) Ensure the neutral switch and oil pressure switch wiring is clipped behind the wiring guide on the left-hand side of the engine.

e) Ensure the wiring is not routed where it will rub against the engine casing, air filter housing or frame.

5 Ignition control unit - check, ^
removal and installation |g

Check

1If the tests shown in the preceding Sections have failed to isolate the cause of an ignition fault, it is possible that the ignition control unit itself is faulty. No details are available for testing the unit on home workshop equipment. Take the motorcycle to a Honda dealer for testing of the peak voltage.

Removal

2Remove the seat and the seat cowling (see Chapter 8) and disconnect the battery negative (-ve) lead.

3 The control unit is secured to the right-hand side of the frame, alongside the rear mudguard (see illustration).

4Disconnect the multi-pin wiring connector from the ignition control unit.

5 Remove the ignition control unit from its rubber sleeve, or lift the sleeve and unit together off the sleeve's mounting lugs, and remove the unit.

Installation

6 Installation is the reverse of removal. Make
sure the wiring connector is correctly and
securely connected and that the rubber
sleeve is securely fixed to the frame.

6 Ignition timing - general

information and check ^

Date: 2016-01-14; view: 822