Code No.C1541, C1542: Main Relay System
OPERATION
DIAGNOSIS CODE SET CONDITIONS
- When the voltage at main relay OFF is 6 V and over, the code No.C1541 is set as the main relay malfunction.
- When the voltage at main relay ON is 6 V and less, the code No.C1542 is set as the main relay malfunction.
PROBABLE CAUSES
- Malfunction of the transfer-ECU
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III diagnosis code. |
| Check if the diagnosis code is set. |
Q.
Are diagnosis codes C1422 and C1423 set?
|
 Refer to diagnosis codes C1422, C1423: Power Supply Voltage System  . |
|
 Go to Step 2. |
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STEP 2. Replace the transfer-ECU. |
| (1)Replace the transfer-ECU. |
| (2)Test drive the vehicle. |
| (3)Check if the diagnosis code is set. |
Q.
Is diagnosis code No.C1541 or No.C1542 set?
|
| Replace the transfer-ECU. |
|
| The procedure is complete. |
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