TM 5-3805-293-23-1
0011
Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.
CDI FMI CODE
ERROR/EVENT
CORRECTIVE ACTION
1589-04 Turbocharger Inlet
2. Start and run the engine.
Air Pressure Sensor Volt-
3. Using MSD (WP 0006), select
age Below Normal Code -
Engine ECM C6.6 120M, and
Continued
check if diagnostic code 1589-04
is active.
4. Turn the ignition switch to the
OFF position.
5. Disconnect the turbocharger inlet
air pressure sensor harness con-
nector FE-C6 (WP 0009, Figure
26).
6. Start and run the engine.
N OT E
Wait at least 30 seconds in order for diagnostic codes to become active.
7. Using MSD (WP 0006), select
1589-04 remains active - Proceed to
Engine ECM C6.6 120M, and
step 8.
check if diagnostic code 1589-03
1589-03 becomes active - Turbo-
is active.
charger inlet air pressure sensor is
faulty, replace turbocharger inlet air
pressure sensor (WP 0112).
8. Using a digital multimeter, mea-
Voltage OK (4.84-5.16 Volts) - 5-Volt
sure turbocharger inlet air pres-
supply circuit R997-OR and Engine
sure sensor 5-Volt supply circuit
ECM test OK, proceed to step 9.
for voltage between FE-C6 (WP
Voltage NOT OK - Proceed to Test
0009, Figure 26) terminal A and
Step 2.
ground.
Voltage should be within 4.84 - 5.16
Volts.
9. Turn the ignition switch to the
OFF position.
10. Disconnect harness connector
FE-C1 (WP 0009, Figure 27) from
harness connector FA-C18 (WP
0009, Figure 28).
11. Using a digital multimeter, test for
Continuity - Fuel wiring harness is
continuity between harness con-
shorted, replace fuel wiring harness
nector FE-C1 (WP 0009, Figure
(WP 0064).
27) terminal 9, and all other FE-
No Continuity - Proceed to step 12.
C1 terminals, and ground.
There should be no continuity.
12. Disconnect Engine ECM harness
connector FA-C17 (WP 0009, Fig-
ure 14) from Engine ECM J1.
Change 1
0011-146
