Glow Plug Operation Check
Precautions: General safety (00)
NOTE:
For identification of each cylinder, refer to Statement on Cleanliness and Care:D16AA.
Circuit Diagram
| [A]: | ECM connector (View: [a]) | C1: | Glow plug No.1 drive circuit | 3. | Glow plug No.1 |
| A1: | Glow plug control module power supply circuit | C2: | Glow plug No.2 drive circuit | 4. | Glow plug No.2 |
| A2: | Glow plug control module power supply circuit | C3: | Glow plug No.3 drive circuit | 5. | Glow plug No.3 |
| A3: | Glow plug control module ground circuit | C4: | Glow plug No.4 drive circuit | 6. | Glow plug No.4 |
| B1: | Glow plug control module drive circuit | 1. | ECM | ||
| B2: | Glow plug control module communication circuit | 2. | Glow plug control module |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Output test
1)When ignition is “OFF”, connect SUZUKI scan tool to DLC.
2)Disconnect glow plug connector from glow plugs.
3)Set ignition “ON”.
4)Select “Glow Plug” function in “Active Test” mode on SUZUKI scan tool.
5)Check that voltage between each of glow plug connector terminal and vehicle ground is higher than 11 V.
Is check result OK?
|
End.
|
Go to Step 2.
|
| 2 |
Glow plug control module power supply circuit and ground circuit check
1)When ignition is “OFF”, disconnect “E07” connector from glow plug control module.
2)Check for proper terminal connection to “E07” connector.
3)If connections are OK, set ignition “ON”.
4)Check that voltage between each of “A1” and “A2” circuits and “A3” circuit is battery voltage.
Is check result OK?
|
Go to Step 5.
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Go to Step 3.
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| 3 |
Glow plug control module ground circuit check
1)Check that voltage between each of “A1” and “A2” circuits and ground is battery voltage.
Is check result OK?
|
Repair “A3” circuit.
|
Go to Step 4.
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| 4 |
Glow plug control module power supply circuit check
1)When ignition is “OFF”, disconnect “E01” connector from ECM.
2)Check for proper terminal connection to “E01” connector.
3)If connections are OK, check the following points.
•Resistance of “A1” and “A2” circuits: less than 1 Ω
•Resistance between each of “A1” and “A2” circuits and ground: infinity •Resistance between “A1” circuit terminal and other terminal at glow plug control module connector: infinity •Resistance between “A2” circuit terminal and other terminal at glow plug control module connector: infinity •Voltage of “A1” and “A2” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Replace ECM and recheck glow plug operation.
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Repair or replace defective wire harness.
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| 5 |
Glow plug control module drive circuit check
1)When ignition is “OFF”, disconnect “E01” connector from ECM.
2)Check for proper terminal connection to “E01” connector.
3)If connections are OK, check the following points.
•Resistance of “B1” circuit: less than 1 Ω
•Resistance between “B1” circuit and ground: infinity •Resistance between “B1” circuit terminal and other terminal at glow plug control module connector: infinity •Voltage of “B1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 6.
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Repair or replace defective wire harness.
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| 6 |
Glow plug control module communication circuit check
1)Check the following points.
•Resistance of “B2” circuit: less than 1 Ω
•Resistance between “B2” circuit and ground: infinity •Resistance between “B2” circuit terminal and other terminal at glow plug control module connector: infinity •Voltage of “B2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 7.
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Repair or replace defective wire harness.
|
| 7 |
Glow plug drive circuit check
1)When ignition is “OFF”, disconnect “D02” connector from glow plug control module and all glow plug connectors.
2)Check for proper terminal connection to “D02” connector and all glow plug connectors.
3)If connections are OK, check that glow plug drive circuit (“C1”, “C2”, “C3” and “C4”) is as follows.
•Resistance of “C1”, “C2”, “C3” and “C4” circuits: less than 1 Ω
•Resistance between each of “C1”, “C2”, “C3” and “C4” circuits and ground: infinity •Resistance between “C1” circuit terminal and other terminal at glow plug control module connector: infinity •Resistance between “C2” circuit terminal and other terminal at glow plug control module connector: infinity •Resistance between “C3” circuit terminal and other terminal at glow plug control module connector: infinity •Resistance between “C4” circuit terminal and other terminal at glow plug control module connector: infinity •Voltage of “C1”, “C2”, “C3” and “C4” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
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Go to Step 8.
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Repair or replace defective wire harness.
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| 8 |
Glow plug check
1)Check all glow plugs.
Is check result OK?
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Replace glow plug control module and go to Step 1.
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Replace glow plugs.
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