Chrysler RAM TRUCK 2500 1994 Service Manual page 265

7 - 11 COOLING SYSTEM
COOLING
SYSTEM
DIAGNOSIS (ALL EXCEPT DIESEL)—CONTINUED
C O N D I T I O N A N D CHECKS
DIAGNOSIS
POOR HEATER PERFORMANCE. SUSPECT
THERMOSTAT FAILED I N OPEN POSITIONS
(1) Does gauge read low? (1) If YES, replace thermostat. If NO, inspect the heater
hoses for kinks or binds. Also inspect condition of heat
doors in heater. Refer to Group 24, Heat and Air
Conditioning.
(2) Is coolant level low?
(3) Check On-Board Diagnostics. Is code 17 set in memory?
(3)
Conditioning.
(2) Fill cooling system and inspect for leaks. Repair
necessary.
as
If YES, replace thermostat. If NO, inspect the heater
hoses for kinks or binds. Also inspect condition of heat
doors in heater. Refer to Group 24, Heat and Air
Conditioning.
J9407-7