Engine Control System (4HK1) 1A-201
5
1.
Leave the test lamp connected between the
VSS 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 9
Go to Step 8
6
Repair the open circuit or high resistance on the
ignition voltage feed circuit between the Meter
(10A) fuse and the VSS (pin 1 of J-48). Check the
Meter (10A) fuse first.
Did you complete the repair?
—
Go to Step 13
—
7
1.
Test the signal circuit between the ECM (pin
19 of J-14) and the VSS (pin 3 of J-48) 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 13
Go to Step 12
8
1.
Test the signal circuit between the ECM (pin
19 of J-14) and the VSS (pin 3 of J-48) for an
open circuit or high resistance.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13
Go to Step 10
9
1.
Inspect for an intermittent and for poor
connections at the harness connector of the
VSS (pins 1 and 3 of J-48).
2.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13
Go to Step 11
10
1.
Turn OFF the ignition.
2.
Disconnect the ECM harness connector.
3.
Inspect for an intermittent and for a poor
connection at the harness connector of the
ECM (pin 19 of J-14).
4.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13
Go to Step 12
11
Replace the VSS. Refer to Vehicle Speed Sensor in
Section 9E Instrumentation/Driver Info.
Did you complete the replacement?
—
Go to Step 13
—
12
Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 13
—
Step
Action
Value(s)
Yes
No
LG4HKED-WE-0871.book 201
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２００７年１１月２９日 木曜日 午後６時２９分
