1991-Montero-Service-Manual · trouble shooting · страница 10 из 63 · Открыть оригинал PDF ↗
problem symptoms. For model-specific Trouble Shooting,
refer to DIAGNOSTIC, or TESTING articles available in the
section(s) you are accessing.
BASIC HEATER SYSTEM TROUBLE SHOOTING CHART
| CONDITION | POSSIBLE CAUSE |
|---|---|
| Insufficient, Erratic, or No Heat | Low Coolant Level Incorrect thermostat. Restricted coolant flow through heater core. Heater hoses plugged. Misadjusted control cable. Sticking heater control valve. Vacuum hose leaking. Vacuum hose blocked. Vacuum motors inoperative. Blocked air inlet. Inoperative heater blower motor. Oil residue on heater core fins. Dirt on heater core fins. |
| Too Much Heat | Improperly adjusted cables. Sticking heater control valve. No vacuum to heater control valve. Temperature door stuck open. |
| Air Flow Changes During Acceleration | Vacuum system leak. Bad check valve or reservoir. |
| Air From Defroster At All Times | Vacuum system leak. Improperly adjusted control cables. Inoperative vacuum motor. |
| Blower Does Not Operate Correctly | Blown fuse. Blower motor windings open. Resistors burned out. Motor ground connection loose. Wiring harness connections loose. Blower motor switch inoperative. Blower relay inoperative. Fan binding or foreign object in housing. Fan blades broken or bent. |
BRAKES
BRAKE SYSTEM TROUBLE SHOOTING
NOTE: This is GENERAL information. This article is not intended
to be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,
refer to SUBJECT, DIAGNOSTIC, or TESTING articles available
in the section(s) you are accessing.

