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OB1
247 REMOTE COMM ERR
CALL SERVICE
Description
The Master Controller has lost communication
with the Remote Module.
Probable Causes and Test Procedures
- Ensure the remote module has power (24V ±15%
on wire #285C).
* If power not present at aft handle, trace wire
#285C back to the over-the-mast cable.
- If connection is good, but still no power, check
over the mast cable connection to main harness.
- If connection is bad, replace reach harness.
- If mast connection is good, but no power,
check wire #285 from IFB.
- If main harness connection is good, check
FU13 on IFB.
- If fuse is good, replace IFB.
* If power is present, move onto the next check:
- Measure CANbus impedance with truck off and
battery disconnected.
* CAN should be 60 Ohms between wire #900
and #901 at diagnostic connector.
* If CAN impedance is 110 Ohms or greater,
there is a broken CAN line to the remote:
- Check wire #900 and #901 on the over the
mast wire.
- if either have no continuity.
- Replace reach harness if continuity bad or
shorted to B+ or GND.
- If a good connection exists, check wires #900 and
#901 on reach harness through mechanism.
* If connections have been good, check harness
& connector pins for continuity. Repair as necessary
* If no faults in harness found, replace remote
module.
- NOTE: Usually a bad harness or lack of power to
module is the cause.
242 HANDLE COMM ERR
CALL SERVICE
Description
The master controller cannot establish or has lost
CANbus communication with the control handle.
Handle must establish communication with the
master controller within four seconds at startup.
Probable Causes and Test Procedures
- Turn the key switch to the OFF position and
restart the lift truck.
- Check for 24 volts at pin #1 of the handle connector,
wire #1285.
* Check for 24 volts at pin #5 at the IFB connector.
* Check FU 11 on the IFB.
- Check continuity of wire #1285 frompin #5 of the
IFB connector to pin #1 of the handle connector.
* Check FU 11 on the IFB.
- Verify all CANbus wiring between the steering
motor controller and the master controller.
* Ensure all connectors are tight and pins are in
good condition.
* Check all CANbus wiring between terminals
for continuity. Replace any defective wiring.
- Wire #113 between ground and pin #4 at the
multifunction handle connector.
- Wire #900 between pin #23 at the master
controller connector and pin #2 at the multifunction
handle connector.
- Wire #901 between pin #22 at the master
controller connector and pin #3 at the multifunction
handle connector.
- Replace any defective wiring.
- Control handle is defective.
* Replace the control handle.