Group 25
Troubleshooting
Measurement 2
1
Bridge terminals 2 and 11 on the 36–
pin breakout box.
2
Disconnect the 2-pin connector at the
exhaust brake solenoid valve and con-
nect the J–42472 breakout harness
between the solenoid valve and the
wiring harness.
3
Set multimeter to measure Voltage
and connect it to pins 1 and 2 on the
compression brake connector at the
upper timing gear cover.
Intended value: B+
4
If the intended value is correct, re-
move the valve cover and carry out
Measurement 3.
5
If the intended value is not correct,
carry out Measurement 4.
Measurement 3
1
Set multimeter to measure Ohm (
).
2
Measure between 1 and 2 on the com-
pression brake solenoid valve.
Intended value: 20± 2
3
If the intended value is correct, check
the cables between the compression
brake solenoid valve and the connec-
tor at the upper timing gear cover.
4
If the intended value is not correct, re-
place the compression brake solenoid
valve.
Measurement 4
1
Set Multimeter to measure Voltage.
2
Measure between alternate ground
and pin 1 in the connector for the con-
trol valve solenoid valve at the upper
timing gear cover.
Intended value: B+
3
If the value is not correct, check the
wire to pin 1 in the connector for the
control valve at the upper timing gear
cover and to pin 2 at the EB connector
including the engine brake switch(es).
Make repairs and retest.
4
If the value is correct, measure be-
tween alternate battery supply and pin
2 in the connector for the control valve
solenoid at the upper timing gear
cover.
Intended value: B+
5
If the value is correct, clean and in-
spect both pins and sockets at the
connector for the control valve sole-
noid. Repeat measurement 1.
6
If the value is not correct, check the
wire from pin 2 in the connector for the
control valve at the upper timing gear
cover to its ground location, including
compression brake coolant tempera-
ture switch.
28