Yamaha FJR13AEV(C) Service Manual page 635

2. Disconnect the grip warmer control
unit coupler (white/yellow and
black/green) and check that the
temperature does not drop while
the engine is running.
OK ↓
Replace the grip warmer control unit.
The grip warmers do not become very warm while the vehicle is traveling.
1. Disconnect the ECU coupler and
grip warmer control unit coupler
(black and light green/white) and
check for continuity between the
light green/white terminal of the
ECU coupler and the light
green/white terminal of the grip
warmer control unit coupler.
OK ↓
2. Check that the grip warmer adjust-
ing knob is set to the "HI" position.
OK ↓
3. Execute the diagnostic mode (Diag-
nostic code No. 57).
Refer to "Actuator operation table
(Diagnostic code No.57)".
OK ↓
Replace the grip warmer control unit.
GRIP WARMER SYSTEM (FJR13AE only)
NG →
Replace the ECU.
NG →
The wiring system from ECU coupler to
the grip warmer control unit coupler (black
and light green/white) is faulty and must be
repaired.
NG →
Adjust the grip warmer temperature using
the grip warmer adjusting knob.
NG →
Replace the ECU.
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