TM 10-3930-675-24-1
ELECTRONIC CONTROL UNIT (ECU) INPUT VOLTAGE TROUBLESHOOTING - CONTINUED
0013 00
Table 4. Error Code 201 - Supply Voltage to Tophandler ECU (791) Failure - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 201 - Supply Voltage to Tophandler
d. If no voltage (24V) is found at
ECU (791) Failure - Continued.
3009-1 pin 86, check
continuity of wire A1803A
(WP 0048 00-23).
e. Repair or replace damaged
wires or connectors (WP 0113
00).
7. Disconnect
ECU
(791) a. If no voltage (24V) is found at
connector 1 and check voltage
ECU (791) connector 1 pins 1
(24V) at pins 1 and 15 with the
and 15, check operation of
ignition ON (WP 0048 00-23).
relay 3009-2 (WP 0048 00-
Inspect ECU and connector
23). Replace damaged or
pins for damage.
faulty 3009-2 relay (WP 0077
00).
b. If no voltage (24V) is found at
ECU (791) connector 1 pins 1
and 15, check continuity of
wires A51E, A51F, A51G, and
A1803B (WP 0048 00-23).
c. Repair or replace damaged
wires or connectors (WP 0113
00).
d. Replace ECU (791) (WP 0080
00).
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