Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Disconnect the blower motor connector.
- Turn the ignition switch to the ON position.
- Set the A/C mode to DEFROST.
- Set the blower mode to HIGH.
- Measure the voltage between the blower motor connector terminal A
and ground. Refer to
Measuring Voltage
in Wiring Systems.
Is the measured voltage less than the battery voltage?
| --
| Go to
Step 2
| Go to
Step 3
|
2
| Inspect CKT 65 for an open
or a short to ground.
Is the wiring OK?
| --
| Go to
Step 6
| Go to
Step 7
|
3
| Measure the voltage between the blower motor connector terminal A
and terminal B. Refer to
Measuring Voltage
in Wiring Systems.
Is the indicated voltage less than the battery voltage?
| --
| Go to
Step 5
| Go to
Step 4
|
4
|
- Inspect the blower motor connector for proper terminal contact.
Refer to
Intermittents and Poor Connections Diagnosis
in Wiring Systems.
- If the contact is OK, replace the blower motor. Refer to
Blower Motor and Fan Replacement
.
Is the repair complete?
| --
| System OK
| --
|
5
|
- Inspect CKT 151 for an open.
- Repair the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the repair complete?
| --
| System OK
| --
|
6
|
- Disconnect connector C1 and connector C2 from the
blower control module.
- Measure the voltage between blower control module connector C2
terminal B and ground. Refer to
Measuring Voltage
in Wiring Systems.
Is the measured voltage less than battery voltage?
| --
| Go to
Step 9
| Go to
Step 8
|
7
| Repair the
wiring. Refer to
Wiring Repairs
in Wiring Systems.
Is the repair complete?
| --
| System OK
| --
|
8
| Measure the voltage between the control module connector C2
terminal B and control module connector C1 terminal C.
Refer to
Measuring Voltage
in Wiring Systems.
Is the measured voltage less than battery voltage?
| --
| Go to
Step 11
| Go to
Step 10
|
9
|
- Inspect the rear fuse block HVAC BLO MTR (blower motor) fuse.
- Inspect CKT 342 for an open or a short to ground. Repair
the circuit as necessary. Refer to
Wiring Repairs
in Wiring Systems.
Is the repair complete?
| --
| System OK
| --
|
10
| Measure the voltage between the control module connector C1
terminal B and ground. Refer to
Measuring Voltage
in Wiring Systems.
Is the voltage within the specified value?
| 6-8 V
| Go to
Step 13
| Go to
Step 12
|
11
|
- Inspect CKT 151 for an open. Refer to
Wiring Repairs
in Wiring Systems.
- Repair the circuit as necessary.
Is the repair complete?
| --
| System OK
| --
|
12
|
- Inspect CKT 754 for an open or a short to ground.
- Inspect the HVAC programmer connector terminal D10 for
proper terminal contact. Refer to
Intermittents and Poor Connections Diagnosis
in Wiring Systems.
- If the terminal contact is OK, replace the programmer. Refer to
Programmer Replacement
.
Is the repair complete?
| --
| System OK
| --
|
13
|
- Inspect the blower control module connectors C1 and C2
for proper terminal contact.
- If the terminal contact is OK, replace the blower control module.
Refer to
Blower Motor Control Module Replacement
.
Is the repair complete?
| --
| System OK
| --
|
