TM 10-3930-675-20-1
0012 00-6
ELECTRONIC CONTROL UNIT (ECU) INPUT VOLTAGE TROUBLESHOOTING - CONTINUED
0012 00
Table 3. Error Code 123 - 10V Reference Voltage for Servo ECU (790) Failure
Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 123 - 10V Reference Voltage for
Servo ECU (790) Failure - Continued
b. If voltage is not as specified,
check continuity between
connector X157 pin 2 and
junction box X169 pin 2 and
between connector X157 pin
3 and junction box X169 pin
3.
a. If continuity is not present,
repair or replace connectors
(WP 0111 00).
b.If continuity is present, notify
SRA.
Table 4. Error Code 201 - Supply Voltage to Tophandler ECU (791) Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 201 - Supply Voltage to
Tophandler ECU (791) Failure
1. Ensure that emergency stop
switch is not activated.
Release emergency stop switch
(TM
10-3930-675-10)
as
required.
2. Remove tophandler junction
box cover and ensure that
circuit breaker 51-F41 is not
tripped.
Reset circuit breaker as required
(WP 0076 00).
3. Remove and test four relays
3009-1, 3009-2, and 3009-3,
and 315-1 (WP 0111 00).
Replace defective relays (WP
0076 00 and WP 0111 00).
4. Test automatic circuit breaker
F40 at tophandler junction
box (WP 0111 00).
Replace circuit breaker if
shorted (WP 0076 00).
5. Disconnect
ECU
(791)
connector 1 and check voltage
at pin 1 and pin 15.
If voltage is present, replace
ECU (791) (WP 0076 00).
6. Check voltage at relay 3009-
2 pin 87.
If voltage is present, notify SRA.
7. Check voltage at relay 3009-
1 pin 87.
If voltage is present, notify SRA
to replace wire (A51E).
8. Check voltage at circuit
breaker 51-F41.
If voltage is present, notify SRA
to replace wire (A51B).
9. Check voltage at relay 315-1
in 87.
If voltage is present, notify SRA
to replace wire (A51J).
DIAG TOP LIFT 1(16)
SYSTEM POWER 24.00V
POWER RI CAN 24.00V
POWER LE CAN 24.00V
10 V REF OUT 10.00V
