Organizational Troubleshooting (continued)
TEST OR INSPECTION
b. If switch is good, replace PSIG PNEUMATIC meter 1M7
PSIG PNEUMATIC METER READS 0 OR LOW (PNEUMATIC POWER SWITCH ON, ENGINE UP TO
SPEED, AND EGT LESS THAN 1200F).
Check visual position indicator on side of load control valve (5,
a. If valve is fully open, go to step 7.
b. If valve is not fully open, continue with next step.
Shut down engine. Disconnect battery and lower control panel (para-
graph 4-24.a). Disconnect main harness connector P4 from ECU. Set
PNEUMATIC POWER switch to on, and check for continuity between pins T
If continuity, reconnect harness connector P4 to ECU and go
to step 5.
If no continuity, continue with next step.
Test EMERG STOP switch S2 (malfunction 93) l
Replace switch or associated wiring if defective (paragraph
4-47), and perform
If switch and wiring are good, do next step.
Test PNEUMATIC POWER switch 1S8 (malfunction 79).
If switch tests good, remove battery charger access cover.
Disconnect main harness connectors P5 and P6 from control
panel connectors J5 and J6, and disconnect harness connector
P4 from ECU. Check for continuity between the following
points (see FO-7). Replace any defective wire.