Engine Control System (4HK1) 1A-195
4
1.
Connect a test lamp between the control
circuit (pin 2 of J-26) and battery voltage.
2.
Perform the Exhaust Brake Control with a
scan tool.
3.
Command the solenoid valve ON and OFF.
Does the test lamp turn ON and OFF with
each command?
—
Go to Step 9
Go to Step 5
5
Does the test lamp remain illuminated with
each command?
—
Go to Step 8
Go to Step 7
6
Repair the open circuit or high resistance between
the ECM (10A) fuse and the solenoid valve (pin 1 of
J-26). Check the ECM (10A) fuse first.
Did you complete the repair?
—
Go to Step 13
—
7
1.
Test the control circuit between the ECM (pin
15 of J-14) and the solenoid valve (pin 1 of J-
26) 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
8
1.
Test the control circuit between the ECM (pin
15 of J-14) and the solenoid valve (pin 1 of J-
26) for a short to ground.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13
Go to Step 12
9
1.
Inspect for an intermittent and for poor
connections at the harness connector of the
solenoid valve (pins 1 and 2 of J-26).
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 harness connector of the ECM
(pin 15 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 exhaust brake control solenoid valve.
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
—
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.
Turn ON the ignition, with the engine OFF.
5.
Monitor the DTC Information with a scan tool.
Did the DTC fail this ignition?
—
Go to Step 3
Go to Step 14
Step
Action
Value(s)
Yes
No
LG4HKED-WE-0871.book 195
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２００７年１１月２９日 木曜日 午後６時２９分
