1A-202 Engine Control System (4HK1)
Circuit/ System Testing DTC P0502 (Model with ABS)
13
1.
Reconnect all previously disconnected fuse or
harness connector(s).
2.
Clear the DTCs with a scan tool.
3.
Turn OFF the ignition for 30 seconds.
4.
Start the engine.
5.
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 14
14
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not
diagnosed?
—
Go to DTC List
System OK
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.
Start the engine.
4.
Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
—
Go to Step 3
Go to Diagnostic
Aids
3
Observe the ABS DTCs information with a scan
tool.
Is DTC C0251, C0252, C0253, C0254,
C0261, C0262, C0263 or C0264 set?
—
Go to Applicable
DTC
Go to Step 4
4
1.
Turn OFF the ignition.
2.
Disconnect the EHCU harness connector.
3.
Turn ON the ignition, with the engine OFF.
4.
Connect a test lamp between the vehicle
speed signal circuit (pin 14 of J-22) and a
battery voltage.
Does the test lamp illuminate?
—
Go to Step 6
Go to Step 5
5
1.
Leave the test lamp connected between the
EHCU harness connector and battery voltage.
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.
Is DTC P0503 also set?
—
Go to Step 8
Go to Step 7
6
1.
Test the vehicle speed signal circuit between
the ECM (pin 19 of J-14) and the EHCU (pin
14 of J-22) for a short to ground or short to the
low reference.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12
Go to Step 11
Step
Action
Value(s)
Yes
No
LG4HKED-WE-0871.book 202
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２００７年１１月２９日 木曜日 午後６時２９分
