TM-9-2350-277-20-1

CARRIER M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL VOLUME 1 OF 6

TM-9-2350-277-20-1 - Page 446 of 855

TM 9-2350-277-20-1

COOLANT HEATER MALFUNCTIONS — Continued

0089 00

DY

1.

Remove harness 10943141 plug (1) from heater control jack (2).

2.

Measure voltage between heater control jack (2) pin A (3) and

ground with HEATER switch on START.

3.

Does multimeter read 17 volts or more?

DYN

GO TO

EY

(PAGE 0089 00-8)

D2Y

1.

Install harness 10943141 on heater control box jack.

2.

Remove harness 10943141 plug (1) from heater fuel

pump jack (2).

3.

Measure voltage between harness 10943141 plug (1) pin and

ground with HEATER switch on START.

4.

Does multimeter read 17 volts or more?

D2YN

1.

Replace harness 10943141 circuit

402 (WP 0382 00).

2.

Verify no faults found.

D3Y

1.

Replace coolant heater fuel pump (WP 0731 00).

2.

Verify no faults found.

008900-7

Change 5