TM-9-2540-207-14-P
HEATER, VEHICULAR COMPARTMENT, MODEL: A20
TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2007
TM-9-2540-207-14-P - Page 179 of 288
TM 9-2540-207-14&P
6-15
6.5.19
CA - FUEL INJECTOR FAULT (Design Iteration 1 & 2 Only)
OPERATING PARAMETERS FOR THE FUEL INJECTOR ARE OUTSIDE NORMAL LIMITS
CHECK/POSSIBLE CAUSE
REF
.R
EPAIR
1
CHECK THAT ELECTRICAL CONNECTOR IS
ATTACHED TO FUEL INJECTOR
5.5.5
RECONNECT FUEL INJECTOR TO WIRING HARNESS
RESTART HEATER
2
CHECK THAT GROUND LUG (LOCATED
UNDERNEATH TOP HOUSING) IS ATTACHED
5.4.1
FASTEN GROUND LUG TO TOP HOUSING CHASSIS
RESTART HEATER
3
CHECK THE RESISTANCE OF FUEL
INJECTOR.
5.5.5
IF RESISTANCE SHOWS GREATER THAN 100 OHMS OR OPEN
CIRCUIT, THE FUEL INJECTOR HAS FAILED.REPLACE FUEL
INJECTOR
RESTART HEATER
IF RESISTANCE IS APPROXIMATELY 15 OHMS, THEN GO TO STEP 4.
4
DEFECTIVE WIRING HARNESS
5.5.6
REPLACE WIRING HARNESS
RESTART HEATER
5
DEFECTIVE ELECTRONIC PROGRAMMED
CONTROLLER BOARD
5.2.5
REPLACE ELECTRONIC PROGRAMMED CONTROLLER
RESTART HEATER
6.5.20 CA - FUEL INJECTOR FAULT (Design Iteration 3 Only)
OPERATING PARAMETERS FOR THE FUEL INJECTOR ARE OUTSIDE NORMAL LIMITS
CHECK/POSSIBLE CAUSE
REF
.R
EPAIR
1
CHECK THAT ELECTRICAL CONNECTOR IS
ATTACHED TO FUEL INJECTOR
RECONNECT FUEL INJECTOR TO
WIRING HARNESS PLUG P5 AND
RECONNECT THE HARNESS PLUG P8 TO THE POWER BOARD
RESTART HEATER
2
CHECK THE RESISTANCE OF FUEL INJECTOR.
5.5.5
IF RESISTANCE SHOWS GREATER THAN 100 OHMS OR LESS THAN
5 OHMS,
THE FUEL INJECTOR HAS FAILED.
REPLACE FUEL INJECTOR
RESTART HEATER
IF RESISTANCE IS APPROXIMATELY 15 OHMS, THEN GO TO STEP
3.
3
CHECK
WIRING HARNESS FOR DAMAGE AND
CONTINUITY
CHECK 2 WIRES FROM
PLUG P5 TO POWER BOARD PLUG P8:
P5-PIN1 TO P8-PIN4
P5-PIN2 TO P8-PIN3
CHECK FOR SHORT;
P5-PIN1 TO CHASIS SHOULD BE OPEN LINE
P5-PIN2 TO CHASIS SHOULD BE OPEN LINE
IF ANY CHECK FAILS
REPLACE WIRING HARNESS
RESTART HEATER
4
DEFECTIVE POWER BOARD
REPLACE POWER BOARD
RESTART HEATER
5
DEFECTIVE LOGIC BOARD
REPLACE LOGIC BOARD
RESTART HEATER
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