Inspection Procedure 8: The compressor does not work <Except for
4M40>
![](../../../img/55/W7B55X002A00ENG.png)
![](../../../img/55/AC607450AC00ENG.png)
![](../../../img/55/AC607509AD00ENG.png)
![](../../../img/55/AC607562BN00ENG.png)
![](../../../img/55/AC607570BM00ENG.png)
![](../../../img/55/AC607563BD00ENG.png)
![](../../../img/55/AC607569BG00ENG.png)
![](../../../img/55/AC607564AT00ENG.png)
![](../../../img/55/AC607571AT00ENG.png)
![](../../../img/55/AC607567AS00ENG.png)
![](../../../img/55/AC607609AT00ENG.png)
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COMMENTS ON TROUBLE SYMPTOM
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If the A/C compressor does not operate,
the A/C compressor circuit system may be defective.
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- Malfunction of A/C compressor
- Malfunction of A/C compressor relay
- Malfunction of A/C pressure sensor
- Damaged harness wires and connectors
- Malfunction of engine-A/T-ECU
- Malfunction of the A/C-ECU
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STEP 1. Connector check: D-213 engine-ECU connector <4M41>,
D-243 engine-ECU connector <6G75-M/T> or D-212
engine-A/T-ECU connector <6G75-A/T> and B-22
A/C compressor assembly connector
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Q.
Is the check result normal?
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Go to Step 2.
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Repair
the connector.
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STEP 2. Voltage measurement at B-22 A/C compressor assembly
connector.
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(1)Disconnect the connector, and measure at the wiring
harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Disconnect engine-ECU connector D-213 and earth terminal
40. <4M41>
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(4)Disconnect engine-ECU connector D-245 and earth terminal
16. <6G75-M/T Except for GCC>
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(5)Disconnect engine-A/T-ECU connector D-212 and earth
terminal 16. <6G75-A/T Except for GCC>
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(6)Disconnect engine-ECU connector D-245 and earth terminal
8. <6G75-M/T Vehicles for GCC>
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(7)Disconnect engine-A/T-ECU connector D-212 and earth
terminal 8. <6G75-A/T Vehicles for GCC>
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(8)Voltage between terminal 1 and body
earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 11.
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Go to Step 3.
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STEP 3. Connector check: B-16X A/C compressor relay
connector
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Q.
Is the check result normal?
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Go to Step 4.
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Repair
the connector.
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STEP 4. Check the A/C compressor relay continuity.
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Refer to .
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Q.
Is the A/C compressor relay in good condition?
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Go to Step 5.
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Replace the A/C compressor
relay.
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STEP 5. Voltage measurement at B-16X A/C compressor relay
connector.
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(1)Remove the relay, and measure at the relay block
side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 1 and body
earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 6.
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STEP 6. Check the wiring harness between B-16X A/C compressor
relay connector terminal No.1 and the ignition switch (IG2).
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note |
Prior to the wiring harness inspection, check
junction block connectors D-403, D-401, intermediate connector D-230 and
D-113 <4M41>, and repair if necessary.
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- Check the A/C compressor relay power supply line for open
circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair
the wiring harness.
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STEP 7. Voltage measurement at B-16X A/C compressor relay
connector.
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(1)Remove the relay, and measure at the relay block
side.
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(2)Voltage between terminal 5 and body
earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 9.
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Go to Step 8.
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STEP 8. Check the wiring harness between B-16X A/C compressor
relay connector terminal No.5 and the fusible link (1).
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note |
Prior to the wiring harness inspection, check
intermediate connector A-05, and repair if necessary.
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- Check the A/C compressor relay power supply line for open
circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair
the wiring harness.
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STEP 9. Check the wiring harness between D-213 engine-ECU connector
terminal No.40 <4M41>, D-243 engine-ECU connector terminal
No.16 <6G7-M/T except for GCC>, D-212
engine-A/T-ECU connector terminal No.16 <6G7-A/T except
for GCC>, D-243 engine-ECU connector terminal No.8
<6G7-M/T vehicles for GCC>, D-212 engine-A/T-ECU
connector terminal No.8 <6G7-A/T vehicles for GCC> or
D-212 engine-A/T-ECU connector terminal No.8 <6G7-A/T
vehicles for GCC> and B-16X A/C compressor relay connector
terminal No.3.
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- Check the A/C compressor relay power supply line for open
circuit.
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Q.
Is the check result normal?
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Go to Step 10.
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Repair
the wiring harness.
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STEP 10. Check the wiring harness between B-16X A/C compressor
relay connector terminal No.4 and B-22 A/C compressor assembly
connector terminal No.1.
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- Check the A/C compressor power supply line for open
circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair
the wiring harness.
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STEP 11. Check the magnetic clutch operation.
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Refer to .
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Q.
Can the sound of the magnetic clutch (click) be heard?
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Go to Step 12.
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Replace the compressor magnet clutch.
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STEP 12. Connector check: D-08 A/C-ECU connector, D-245
engine-ECU connector <6G75-M/T> and D-216
engine-A/T-ECU connector <6G75-A/T>
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Q.
Is the check result normal?
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Go to Step 13.
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Repair
the connector.
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STEP 13. Check the wiring harness between D-213 engine-ECU connector
(terminals 15 and 13) <4M41>, D-245 engine-ECU connector
(terminals 69 and 78) <6G75-M/T> or D-216
engine-A/T-ECU connector (terminals 69 and 78)
<6G75-A/T> and D-08 A/C-ECU connector (terminals
12 and 13).
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note |
Prior to the wiring harness inspection, check
intermediate connector D-230, and repair if necessary.
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- Check the engine-A/T-ECU input line for open circuit.
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Q.
Is the check result normal?
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Go to Step 14.
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Repair
the wiring harness.
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STEP 14. Check the wiring harness between D-08 A/C-ECU connector
terminal No.6 and B-22 A/C compressor connector terminal
No.78.
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note |
Prior to the wiring harness inspection, check
intermediate connector D-230, and repair if necessary.
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- Check the engine-A/T-ECU input line for open circuit.
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Q.
Is the check result normal?
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Go to Step 15.
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Repair
the wiring harness.
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STEP 15. Remove the refrigerant, and fill it to the specified
amount.
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Remove the refrigerant and fill it to the
specified amount. Then check if the A/C operates normally. Refer to
.
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Q.
Is the check result normal?
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This
diagnosis is complete.
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Go to Step 16.
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STEP 16. Replace the A/C-ECU, and then recheck the trouble
symptom
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Check that the compressor works
normally.
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Q.
Is the check result normal?
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This
diagnosis is complete.
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Replace the engine-ECU
<M/T> or engine-A/T-ECU
<A/T>.
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