Volvo TSI, Manual

Page: 226 / 250

Group 28 Troubleshooting
Check of Subsystem
1
Disconnect the VECU and install
adapter J-43234 between the VECU
and wiring harness connectors PB/PA.
J-43234
2
Connect the 60–pin breakout box
9998551 (with overlay J-43340) to the
adapter.
9998551
J-43340
Ground wire:
3
Turn the ignition key to the OFF posi-
tion.
4
Connect an ohmmeter to the 60–pin
breakout box and measure the resis-
tance between pin PB23 and the
alternate ground.
Measuring points Optimal value
PB23/ Alternate
ground
<1
J-39200
Supply wire:
5
Ignition key in ON position.
6
Connect a voltmeter to the 60–pin
breakout box and measure the voltage
from pin PB26 to PB23.
Measuring points Optimal value
PB26 / PB23 5 ± 20% V
J-39200
Signal wire:
7
Turn the ignition key to the ON posi-
tion.
8
Connect a voltmeter to the 60-pin
breakout box and measure the voltage
from pin PB25 to PB23.
Measuring points Expected value
0.5 ± 20% V (accelera-
tor pedal at idle)
PB25 / PB23
3.2 ± 20% V (full ac-
celeration)
J-39200
Verification
To verify that the fault has been corrected, use the test
in the VCADS Pro tool (see “Appropriate Tests in the
VCADS Pro Tool” page 223).
224