Page 516 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-32
STEP 6. Connector check: C-214 blower relay
connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO : Repair the connector.
STEP 7. Check the blower relay continuity.
Refer to P.55-75.
Q: Is the blower relay continuity in good condition?
YES :
Go to Step 8.
NO : Replace the blower relay.
STEP 8. Voltage measurement at C-214 blower
relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 10.
NO : Go to Step 9.
AC303808
Junction block side Junction block (front view)
Connector: C-214
AL
AC303822
Junction block side Junction block (front view)
Connector: C-214
AM
AC303808
Junction block side Junction block (front view)
Connector: C-214
AL
AC303822
Junction block side Junction block (front view)
Connector: C-214
AM
AC301541EI
Connector C-214
(Junction block side)
3
4
5
12
Page 517 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-33
STEP 9. Check the wiring harness between C-214
blower relay connector terminal No.3 and the
ignition switch (IG2).
NOTE: Prior to the wiring harness inspection, check
junction block connector C-210, and repair if
necessary.
•Check the blower relay power supply line for
open circuit.Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 10. Resistance measurement at C-214
blower relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Measure the resistance Continuity between
terminal 1 and body earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES :
Go to Step 13.
NO : Go to Step 11.
NO : Go to Step 12.
AC303809
Connectors: C-210, C-214
AL
C-214
C-210
Junction block (front view)
C-210 Harness side
Junction block side
C-214
AC303823
Junction block side Junction block (front view)
Connectors: C-210, C-214
C-210C-214 Harness side
C-214
C-210
AK
AC303808
Junction block side Junction block (front view)
Connector: C-214
AL
AC303822
Junction block side Junction block (front view)
Connector: C-214
AM
AC301541EJ
Connector C-214
(Junction block side)
3
4
5
12
Page 518 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-34
STEP 11. Check the wiring harness between
C-214 blower relay connector terminal No.1 and
earth.
NOTE: Prior to the wiring harness inspection, check
junction block connectors C-212, and repair if
necessary.
•Check the blower relay earth wires for open
circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 12. Check the wiring harness between
C-214 blower relay connector terminal No.1 and
earth.
NOTE:
Prior to the wiring harness inspection, check junction
block connectors C-212 and joint connectors C-07,
and repair if necessary.
•Check the blower relay earth wires for open
circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC303809
Junction block (front view)
Connectors: C-212, C-214
C-212C-214
AP
C-212
Harness side
Junction block side
C-214
AC303823
Connectors: C-212, C-214
AO
Junction block (front view)
C-214C-212Junction block side
C-214
C-212
Harness side
AC303814
Connector: C-07
AR
Page 519 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-35
STEP 13. Voltage measurement at C-214 blower
relay connector.
(1) Remove the relay, and measure at the junction
block side.
(2) Measure the voltage between terminal 5 and
body earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 16.
NO : Go to Step 14.
NO : Go to Step 15.
STEP 14. Check the wiring harness between
C-214 blower relay connector terminal No.5 and
fusible link (1).
NOTE:
Prior to the wiring harness inspection, check
intermediate connectors C-21 and junction block
connector C-211, and repair if necessary.
•Check the blower relay power supply line for
open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC303808
Junction block side Junction block (front view)
Connector: C-214
AL
AC303822
Junction block side Junction block (front view)
Connector: C-214
AM
AC301541EK
Connector C-214
(Junction block side)
3
4
5
12
AC303809
Connectors: C-211, C-214
AN
C-214
C-211
Junction block (front view)
C-211 Harness side
Junction block side
C-214
AC303798
Connector: C-21
AK
Page 520 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-36
STEP 15. Check the wiring harness between
C-214 blower relay connector terminal No.5 and
fusible link (1).
NOTE:
Prior to the wiring harness inspection, check
intermediate connectors C-121, C-138 and junction
block connector C-211, and repair if necessary.
•Check the blower relay power supply line for
open circuit.Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 16. Connector check: C-140 blower switch
connector
Q: Is the check result normal?
YES :
Go to Step 17.
NO : Repair the connector.
STEP 17. Check the blower switch continuity.
Refer to P.55-79.
Q: Is the blower switch continuity in good condition?
YES :
Go to Step 18.
NO : Replace the blower switch.
AC303823
Connectors: C-211, C-214
AL
C-214
C-211
Junction block (front view)
C-211 Harness side
Junction block side
C-214
AC303816
Connector: C-121
AB
AC303818
Connector: C-138
AI
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
Page 521 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-37
STEP 18. Check the wiring harness between
C-140 blower switch connector terminal No.2 and
C-214 blower relay connector terminal No.4.
NOTE: Prior to the wiring harness inspection, check
junction block connectors C-210, and repair if
necessary.
•Check the blower relay output line for open
circuit.
Q: Is the check result normal?
YES :
Go to Step 19.
NO : Repair the wiring harness.
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
AC303809
Connectors: C-210, C-214
AL
C-214
C-210
Junction block (front view)
C-210 Harness side
Junction block side
C-214
AC303823
Junction block side Junction block (front view)
Connectors: C-210, C-214
C-210C-214 Harness side
C-214
C-210
AK
Page 522 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-38
STEP 19. Check the wiring harness between
C-110 blower motor connector terminal No.1 and
C-140 blower switch connector terminal No.6.
•Check the blower motor power supply line for
open circuit.Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 20. Check the blower fan and motor
operation.
Refer to P.55-86.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Replace the blower motor.AC303804
Connector: C-110
AF
Harness side
AC303816
Connector: C-110
AK
Harness side
AC303802
Connector: C-140
AF
Harness side
AC303818
Connector: C-140
AK
Harness side
Page 523 of 788
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-39
INSPECTION PROCEDURE 6: Blower Air Amount cannot be Changed.
COMMENTS ON TROUBLE SYMPTOM
If the blower air amount can not be changed when
the blower switch is operated, the blower switch may
be defective.
TROUBLESHOOTING HINTS
•Malfunction of the resistor
•Damaged the wiring harness or connectors
•Malfunction of the blower switch
DIAGNOSIS
STEP 1. Check that the blower motor operates
when the blower switch is moved to the "4 (HI)"
position.
(1) Turn the ignition switch to the "ON" position.
(2) Turn the blower switch to the "4 (HI) " position.
Q: Does the blower motor operate when the blower
switch is moved to the "4 (HI)" position?
YES :
Go to STEP 2.
NO : Refer to Inspection procedure 5 "Blower fan
and motor do not turn P.55-29."
BLOWER RELAY
BLOWER
SWITCH
RESISTOR
BLOWER
MOTOR
Wire colour code
B : Black LG : Light green G : Green L : Blue
W : White Y : Yellow SB : Sky blue BR : Brown
O : Orange GR : Gray R : Red P : Pink V : Violet Blower Switch and Resistor Circuit
