TM 10-3930-675-24-1
ELECTRONIC CONTROL UNIT (ECU) INPUT VOLTAGE TROUBLESHOOTING - CONTINUED
0013 00
Table 2. Error Code 122 - Supply Voltage to Servo ECU (790) Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 122 - Supply Voltage to Servo ECU 1. Check circuit breaker F32 for Reset circuit breaker as required.
(790) Failure.
trip.
2. Check voltage (24V) at X150 a. If no voltage (24V) is found,
pin 2 with the ignition ON (WP
check circuit breaker F32 and
0048 00-5).
continuity of wire 302 (WP
0048 00-32).
b. Replace damaged or faulty
circuit breaker (WP 0074 00).
DIAG SERVO
1(13)
SYSTEM POWER
24.00V
c. Repair or replace damaged
POWER RI CAN
24.00V
wires or connectors (WP 0113
POWER LE CAN
24.00V
00).
10V REF OUT
10.00V
3. Disconnect
ECU
(790) a. If no voltage (24V) is found,
connector 1 and check voltage
check continuity of wires
(24V) at pins 7 and 8 with the
A1502A and A1502B (WP
ignition ON (WP 0048 00-5).
0048 00-5).
Inspect ECU (790) connector 1 b. Repair or replace damaged
pins and connector for
wires or connectors (WP 0113
damage.
00).
c. Replace damaged ECU (790)
(WP 0080 00).
0013 00-3
