Code No.C1468: Rear Differential Lock Air Pump Assembly System
AIR PUMP ASSEMBLY SYSTEM CIRCUIT
OPERATION
DIAGNOSIS CODE SET CONDITIONS
PROBABLE CAUSES
- Malfunction of the rear differential lock air pump assembly
- Damaged harness wires and connectors
- Malfunction of the transfer-ECU
DIAGNOSIS PROCEDURE |
STEP 1. Connector check: E-118 rear differential lock air pump assembly connector, D-221, D-228, E-120 intermediate connector, D-124 transfer-ECU connector. |
| Check for the contact with terminals. |
Q.
Is the check result normal?
|
 Go to Step 2. |
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 Repair the defective connector. |
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STEP 2. Check the harness between rear differential lock air pump assembly connector E-118 terminal No.2 and transfer-ECU connector D-124 terminal No.19. |
| Check the power supply line for open circuit. |
Q.
Is the check result normal?
|
| Go to Step 3. |
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| Repair the wiring harness. |
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STEP 3. Check the harness between rear differential lock air pump assembly connector E-118 terminal No.1 and earth. |
| Check the earth line for open circuit. |
Q.
Is the check result normal?
|
| Go to Step 4. |
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| Repair the wiring harness. |
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STEP 4. Check the rear differential lock air pump assembly. |
| Refer to GROUP 27 - Rear Differential Lock . |
Q.
Is the check result normal?
|
| Go to Step 5. |
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| Replace the rear differential lock air pump assembly (Refer to GROUP 27 - Rear Differential Lock ). |
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STEP 5. M.U.T.-III data list. |
| Item 28: Air pump motor current (Refer to .) |
Q.
Is the check result normal?
|
| Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). |
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| Replace the transfer-ECU. |
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