| 1 |
Diagnostic Trouble Code (DTC) confirmation
- Clear DTC(s) referring to DTC CLEARANCE .
- Turn ignition switch to OFF position.
- Check if any DTC is detected referring to DTC CHECK .
Is DTC P1621 still detected? |
Go to Step 2. |
The troubleshooting is completed. |
| 2 |
Fuse check
- Check if any related fuse is blown.
Is any fuse blown? |
Replace blown fuse(s) with new one(s). |
Go to Step 3. |
| 3 |
ICM poor connection check
- Disconnect ICM connector "G24" referring to IMMOBILIZER CONTROL MODULE (ICM) REMOVAL AND INSTALLATION .
- Check if wire connections are normal at ICM connector "G24".
Is each wire connection normal? |
Go to Step 4. |
Repair poor connection (s). |
| 4 |
ECM poor connection check
- Disconnect ECM connector "E23" referring to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION
or ECM (ENGINE CONTROL MODULE) REMOVAL AND INSTALLATION
.
- Check for proper following terminal connections to ECM connector.
- J24B model: "E23-13" and "E23-28"
- N32A model: "E23-1" and "E23-3"
Is each wire connection normal? |
Go to Step 5. |
Repair poor connection (s). |
| 5 |
Check for open in power supply wire circuit
- Connect ICM connector "G24" referring to IMMOBILIZER CONTROL MODULE (ICM) REMOVAL AND INSTALLATION .
- With the ignition switch at ON position, check voltage between "G24-1" wire terminal at ICM and body ground.
Is voltage about 12 V? |
Go to Step 6. |
Repair open in power supply wire circuit. |
| 6 |
Check for open in ground wire circuit
- With the ignition switch at ON position, check voltage between "G24-2" wire terminal at ICM and body ground.
Is voltage 0 V? |
Go to Step 7. |
Repair open in ground wire circuit. |
| 7 |
Check for short to ground circuit in communication wire circuit
- With ICM connector "G24" and ECM connector "E23" disconnected, check resistance between "G24-4"/"G24-3" wire terminal at ICM connector and body ground.
Is resistance infinite? |
Go to Step 8. |
Repair short to ground wire circuit in communication wire circuit. |
| 8 |
Check for short to power circuit in communication wire circuit
- With ICM connector "G24" and ECM connector "E23" disconnected, turn the ignition switch to ON position.
- Check voltage between "G24-4"/"G24-3" wire terminal at ICM connector and body ground.
Is voltage 0 V? |
Go to Step 9. |
Repair short to power supply wire circuit in communication wire circuit. |
| 9 |
Check for short of communication wire circuit
- With ICM connector "G24" and ECM connector "E23" disconnected, check resistance between "G24-3" wire terminal and "G24-4" wire terminal at ICM connector.
Is resistance infinite? |
Go to Step 10. |
Repair short of communication wire circuits. |
| 10 |
Check for open in communication wire circuit
- Disconnect ICM connector "G24" referring to IMMOBILIZER CONTROL MODULE (ICM) REMOVAL AND INSTALLATION .
- Disconnect ECM connector "E23" referring to ECM (ENGINE CONTROL MODULE) REMOVAL AND INSTALLATION
or ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION
.
- Check resistance between following terminal at ICM connector and ECM connector with ignition switch ON.
- J24B model: "G24-4" and "E23-13" ("PNK/BLU") wire terminal/"G24-3" and "E23-28" ("GRY/BLU") wire terminal
- N32A model: "G24-4" and "E23-1" ("PNK/BLU") wire terminal/"G24-3" and "E23-3" ("GRY/BLU") wire terminal
Is resistance infinite? |
Repair open in communication wire circuit. |
Go to Step 11. |
| 11 |
ICM check
- Check ICM referring to INSPECTION OF IMMOBILIZER CONTROL MODULE (ICM) AND ITS CIRCUIT .
Is ICM normal? |
Replace ECM with new one referring to ECM (ENGINE CONTROL MODULE) REMOVAL AND INSTALLATION
or ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION
, and then perform PROCEDURE AFTER ECM REPLACEMENT . |
Replace ICM with new one referring to IMMOBILIZER CONTROL MODULE (ICM) REMOVAL AND INSTALLATION . |