Engine Control System (4HK1) 1A-165
4
1. Turn OFF the ignition.
2. Replace the glow relay with the starter relay or
replace with a known good relay.
3. Perform the Glow Relay Control with a scan
tool.
4. Command the relay ON and OFF.
Does the glow relay click with each
command?
—
Go to Step 8 Go to Step 5
5
1. Turn OFF the ignition.
2. Remove the glow relay.
3. Turn ON the ignition, with the engine OFF.
4. Probe the ignition voltage feed circuit of the
relay coil side (pin 3 of X-19) with a test lamp
that is connected to a known good ground.
Does the test lamp illuminate?
—
Go to Step 6 Go to Step 7
6
1. Test the control circuit between the ECM (pin
10 of J-14) and the relay (pin 5 of X-19) for the
following conditions:
• An open circuit
• A short to ground
• A short to battery or ignition voltage
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 9
7
Repair the open circuit or high resistance between
the ECM (10A) fuse and the glow relay coil side
(pin 3 of X-19). Check the ECM (10A) fuse first.
Did you complete the repair?
—
Go to Step 12
—
8
1. Remove the glow relay.
2. Inspect for an intermittent and for a poor
connection on each relay terminal.
3. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 10
9
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 10 of J-14).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12 Go to Step 11
10
Replace the glow relay.
Did you complete the replacement?
—
Go to Step 12
—
11
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 12
—
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 165 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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