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BLOWER MOTOR / RESISTOR / AIR INTAKE ACTUATOR / BLOWER RELAY

G-42prose procedure

Resistor terminal table lists alternate terminal letters in parentheses for the wire-type variant, e.g. A (D).

Inspection

Blower Motor Inspection

  1. 1
    Disconnect the blower motor connector.
  2. 2
    Connect battery positive voltage to terminal A and ground to terminal B of the blower motor. Verify that the motor operates.
    Line drawing of the blower motor with its connector. Terminals A and B are labelled at top-left; battery positive voltage is applied to A and ground to B to verify motor operation.
  3. 3
    If not as specified, replace the blower motor. (Refer to page G-41.)

RESISTOR

Inspection

Resistor Inspection

  1. 1
    Disconnect the resistor connector.
  2. 2
    Check for continuity between the resistor terminals.
    Resistor with connector and harness. Connector terminal layout shows positions B and D on top row, A and C on bottom row.
  3. 3
    If not as specified, replace the resistor. (Refer to page G-41.)

Resistor terminal continuity (O—O: Continuity; ( ): Wire type)

O—O
B (C)O
C (A)
D (B)
O
B (C)
C (A)O
D (B)
O
B (C)
C (A)
D (B)O

AIR INTAKE ACTUATOR

Inspection

Air Intake Actuator Inspection

  1. 1
    Disconnect the air intake actuator connector.
  2. 2
    Connect battery positive voltage to the following terminals and check the operation of the air intake actuator.
    B+: Battery positive voltage
    Air intake actuator installed on the blower unit with its connector. Connector terminal layout labelled D, C, B, A.
  3. 3
    If not as specified, replace the air intake actuator. (Refer to page G-41.)

Air intake actuator operation (B+: Battery positive voltage)

D
GNDC
Actuator operationREC → FRESH
D
GNDA
Actuator operationFRESH → REC

BLOWER RELAY

Removal / Installation

Blower Relay Removal / Installation

  1. 1
    Remove the blower unit. (Refer to page G-40.)
  2. 2
    Disconnect the blower relay connector.
  3. 3
    Remove the blower relay from the blower unit.
    Blower relay mounted on the blower unit with connector and mounting screw, shown for removal.
  4. 4
    Install in the reverse order of removal.

Inspection

Blower Relay Inspection

  1. 1
    Remove the blower relay.
  2. 2
    Check for continuity between the relay terminals.
    B+: Battery positive voltage
    Blower relay internal circuit schematic (coil between B and D, switch contacts A-C) alongside the relay connector terminal layout showing C and A on top row, D and B on bottom row.
  3. 3
    If not as specified, replace the blower relay.

Blower relay terminal continuity (B+: Battery positive voltage; O—O: Continuity)

—
GND (Connection)—
AO
BO
C
D
A
GND (Connection)B
A
B
CO
DO
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See also

page G-41page G-40

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