1) Connect the scan tool. Does the scan tool power up?
Yes
=>Go to Scan tool communication verification.
No
Go to Scan tool does not power up.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Scan tool does not power up".
1) Turn ON the ignition switch.
2) Check the communication status with the ECM using the scan tool. Can communication with the ECM be established?
Yes
=>Go to Immobilizer-related DTC check.
No
Go to Lost communication with the ECM.
1) Observe the DTC information with a scan tool. Is DTC P0633, P161B, U0167, U2300, U2301, U2302, or U2303 set?
Yes
Go to the applicable DTC diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0633 Immobilizer Key Not Programmed - ECM/PCM".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P161B Immobilizer Wrong Response".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U2300 Immobilizer Ignition Line Off".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U2301 Immobilizer Transponder Authentication NG".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U2302 Immobilizer Anti-Scanning Mode".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC U2303 Immobilizer Unknown Signal Received".
No
=>Go to Control module DTC check.
1) Observe the DTC information for each control module with a scan tool. Does the scan tool display a DTC for any control module?
Yes
=>Go to Communication-related DTC check.
No
1) Observe the DTC information with a scan tool. Is a DTC beginning with U or a DTC related to communication with other control modules set?
Yes
Go to the applicable DTC diagnosis.
No
=>Go to Control module internal-related DTC check.
1) Observe the DTC information with a scan tool. Is DTC P0601, P0602, P0604, P0606, P060B, or P1621 set?
Yes
Go to the applicable DTC diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0601 Internal Control Module Memory Check Sum Error".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0602 Control Module Programming Error".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0606 ECM/PCM Processor".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P1621 Control Module Long Term Memory Performance".
No
=>Go to System voltage-related DTC check.
1) Observe the DTC information with a scan tool. Is DTC P0563 set?
Yes
Go to DTC P0563 diagnosis.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC P0563 System Voltage High".
No
1) Observe the DTC information with a scan tool. Are other DTCs set?
Yes
Go to the applicable DTC diagnosis.
No
1) Crank the engine. Does the engine crank?
Note
Yes
No
Diagnose the cause of the lack of cranking.
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) engine does not turn over".
1) Start the engine. Does the engine start?
Yes
=>Go to Customer's concern check.
No
Go to Starting system check.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) starting system check".
1) Check if the customer's concern is related to the systems other than engines. Is the customer's concern related to the systems other than engines?
Yes
Go to the applicable control system inspection.
No
1) Check if the following symptoms are present. Is there any applicable symptom?
Yes
Repair the applicable symptom.
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) Hard start".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) rough, unstable".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) High idle speed".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) cuts out".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) surges".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) lack of power, sluggishness or sponginess".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) hesitation, sag or stumble".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) abnormal combustion noise".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) poor fuel economy".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) Black smoke".
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) White smoke".
No
Go to Intermittent conditions of engine.
Refer to "202.Engine 15D.Symptom(4JJ3 with DPD) intermittent conditions of engine".