Engine Control System (4HK1) 1A-215
DTC P0604, P0606 or P060B (Flash Code 153, 51 or 36)
Circuit Description
This diagnostic applies to internal microprocessor
integrity conditions within the ECM.
Condition for Running the DTC
• The battery voltage is more than 16 volts. (DTC
P0604 and P0606)
• The ignition switch is ON. (DTC P0604 and P0606)
Condition for Setting the DTC
• The ECM detects a malfunction in its internal
random access memory (RAM). (DTC P0604)
• The ECM detects a malfunction in its internal main
central processing unit (CPU) or sub integrated
circuit (IC). (DTC P0606)
• The ECM detects a malfunction in its internal A/D
converter. (DTC P060B)
Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
• The ECM limits fuel injection quantity.
• The ECM inhibits pilot injection.
• The ECM stops engine running. The engine will
run after the key is cycled when the ignition has
been turned OFF for longer than 10 seconds.
(DTC P0604)
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type A.
Circuit/ System Testing DTC P0604, P0606 or P060B
Step Action Value(s) Yes No
1
Did you perform the Diagnostic System Check
-Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
—
Go to Step 3 Go to Step 4
3
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 4
—
4
1. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
—
Go to Step 3 Go to Step 5
5
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not
diagnosed?
—
Go to DTC List System OK
LG4HKED-WE-0871.book 215 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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