Honda Accord 2008 Manual page 2426

07/11/02 09:44:00 61TA0000_220_0396
Function Test
NOTE:
• With climate control: Before testing, troubleshoot the
B-CAN System Diagnosis Test Mode A (see page
22-120).
• Before testing, check the No. 4 (40 A) fuse in the
under-hood fuse/relay box and the No. 16 (7.5 A) fuse
in the driver's under-dash fuse/relay box.
• Be careful not to scratch or damage the defogger
wires with the tester probe.
1. Turn the ignition switch to ON (II), then turn the rear
window defogger switch ON.
2. Measure the voltage between the positive terminal
(A) and body ground. There should be battery
voltage.
• If there is no voltage, check for:
– Faulty rear window defogger relay.
– Faulty climate control unit or HVAC control unit.
– An open in the GRN wire to the positive
• If there is voltage, go to step 3.
＊０１
B
About 2.0 V
3. Turn the ignition switch to LOCK (0).
4. Disconnect the negative terminal (B) from the rear
window defogger.
5. Check for continuity between the negative terminal
(B) and body ground. There should be continuity.
If there is no continuity, check for an open in the
BLK wire or poor ground (G801). If there is
continuity, go to step 6.
terminal.
About 6 V
About 4.2 V About 8.5 V
6. Reconnect the negative terminal to the rear
window defogger.
7. Turn the ignition switch to ON (II), then turn the rear
window defogger switch ON.
8. Touch the voltmeter positive probe to each point
on each defogger wire, and the negative probe to
the negative terminal.
• If the voltage is as specified, the defogger wire
up to that point is OK.
• If the voltage is not as specified, repair the
defogger wire.
– If it is more than specified at one of the points,
there is a break in the negative half of the wire.
– If it is less than specified at one of the points,
there is a break in the positive half of the wire.
A
About 11 V
ＴＡ０８ＡＥ４Ｇ２４１６６１５０４５１ＦＥＡＴ００
22-393