Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 1081
DME 7.8 DME 7.8 0 · Work instruction
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DME 7.8 DME 7.8 0
Work instruction Display OK If not OK
4 Check CAN bus from DME ♦Remove DME control module Repair wiring har-
control module to PSM connector ness
control module for short → End ♦Remove plug I from instrument
circuit to B+ cluster
♦Remove PSM control module
connector
♦Connect special tool 9637 to
wiring harness (DME control
module plug)
♦Measure voltage between spe- 0 V
cial tool 9637 plug IV Pin 36 and
ground
♦Switch on the ignition
♦Measure voltage between spe- 0 V
cial tool 9637 plug IV Pin 37 and ⇒ Step 5
ground
♦Switch on the ignition
5 Check CAN bus from DME ♦Remove DME control module ∞ Ω Repair wiring har-
control module to PSM connector → End ness
control module for short → End ♦Remove plug I from instrument
circuit cluster
♦Remove PSM control module
connector
♦Connect special tool 9637 to
wiring harness (DME control
module plug)
♦Measure resistance between
special tool 9637 plug IV Pin 36
and plug IV Pin 37
P1600 0-195 page 3
Printed in Germany, 2000 p1600
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