Mitsubishi Grandis. Manual - part 319

 

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Mitsubishi Grandis. Manual - part 319

 

 

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-161

DIAGNOSIS

Step 1. Connector check: C-215 rear blower 
motor connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector.

Step 2. Check the rear blower relay

 Refer to 

P.55-196

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the rear blower relay.

Step 3. Connector check: C-15 intermediate 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

Step 4. Voltage measurement at C-15 
intermediate connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the ON position.

(3) Disconnect A/C-ECU connector C-104 and earth 

terminal 56.

(4) Measure the voltage between terminal 1 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Go to Step 5.

AC310618

Connector: C-215 <RHD>

AH

Junction block side

Junction block (Front view)

AC310628AE

Connector: C-15 <RHD>

AC310628AE

Connector: C-15 <RHD>

AC310631AH

Connector: C-104 <RHD>

Harness side

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

AC310507

Connector C-15 

BE

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-162

Step 5. Voltage measurement at C-215 rear 
blower relay connector.

(1) Remove the relay, and measure at the relay block 

side.

(2) Turn the ignition switch to the "ON" position.

(3) Voltage between terminal 3 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 7.

NO : 

 Go to Step 6.

Step 6. Check the wiring harness between C-215 
rear blower relay connector terminal No.3 and 
the ignition switch (IG2).

NOTE: 

Prior to the wiring harness inspection, check junction 
block connectors C-202, C-205 and joint connector 
C-01, and repair if necessary.

• Check the rear 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.

AC310618

Connector: C-215 <RHD>

AH

Junction block side

Junction block (Front view)

AC310507BF

Connector C-215 
(Junction block side)

AC310619

Connectors: C-202, C-205, C-215 <RHD>

AN

Junction block (Front view)

C-205

C-202

C-205

Harness side

C-202

Harness side

C-215

Junction block side

C-215

AC310631AE

Connector: C-01 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-163

Step 7. Voltage measurement at C-215 rear 
blower relay connector.

(1) Remove the relay, and measure at the relay block 

side.

(2) Turn the ignition switch to the "ON" position.

(3) Voltage between terminal 4 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 9.

NO : 

 Go to Step 8.

Step 8. Check the wiring harness between C-215 
rear blower relay connector terminal No.4 and 
the fusible link (30).

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-125 and junction block 
connector C-201, and repair if necessary.

• Check the rear 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.

AC310618

Connector: C-215 <RHD>

AH

Junction block side

Junction block (Front view)

AC310507

Connector C-215 
(Junction block side)

BG

AC310619

Connectors: C-201, C-215 <RHD>

AO

Junction block (Front view)

C-215

Harness side

C-201

C-201

Junction block side

C-215

AC310628AB

Connector: C-125 <RHD>

TROUBLESHOOTING

HEATER, AIR CONDITIONER AND VENTILATION

55-164

Step 9. Check the wiring harness between C-215 
rear blower relay connector terminal No.2 and 
C-104 A/C-ECU connector terminal No.56.

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-201, and repair if 
necessary.

• Check the rear blower relay power supply line for 

open circuit.

Q: Is the check result normal?

YES : 

 Go to Step 10.

NO : 

Repair the wiring harness.

Step 10. Check the wiring harness between C-215 
rear blower relay connector terminal No.4 and 
C-15 intermediate connector terminal No.1.

NOTE: Prior to the wiring harness inspection, check 
junction block connector C-201, and repair if 
necessary.

• Check the rear 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.

AC310631AH

Connector: C-104 <RHD>

Harness side

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

AC310619

Connectors: C-201, C-215 <RHD>

AO

Junction block (Front view)

C-215

Harness side

C-201

C-201

Junction block side

C-215

AC310628AE

Connector: C-15 <RHD>

AC310619

Connectors: C-201, C-215 <RHD>

AO

Junction block (Front view)

C-215

Harness side

C-201

C-201

Junction block side

C-215

 

 

 

 

 

 

 

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