Abs/psm Lights
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Registered User
Joined: Jul 2005
Posts: 3,771
From: Seattle WA
Rep Power: 225
Abs/psm Lights
Picked up my tt after the gtr640 install yesterday. I have not boosted the car yet because the turbos are being broken in first and I have stock boost hoses (mechanic said the stock ones will blow off?). The new hoses were suppossed to get here yesterday but they were a no show.
Well when the car was started the first time the abs and psm lights came on. They will not go off. I read the code: P1656 manufacturer control auxillary input auxilliary output/manufacturer controlled computer and auxilliary outputs.
Any help
Jags
Registered User
Joined: Aug 2003
Posts: 910
From: TX, USA
Rep Power: 59
Here's what the OBDII manual says
P1656
0-197
page 1
p1656
Printed in Germany, 2000
Printed in Germany, 2000
0-197
P1656
575 Coolant shutoff valve - open circuit
Diagnosis conditions
・
Engine running
・
Battery voltage greater than 7 V
・
Coolant temperature greater than 90 °C or ATF temperature >
85 °C
Possible fault cause
Wiring harness
DME control module
Coolant shutoff valve
Affected terminals
Terminal IV/40
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check coolant shutoff
valve for continuity
valve for continuity
Remove connector of coolant
shutoff valve
Measure resistance at coolant
shutoff valve between Pin 1 and
Pin 2
Approx. 20 - 30
Pin 2
Approx. 20 - 30
⇒
Step 2
Replace coolant
shutoff valve
→
End
2 Check wiring from DME
control module to coolant
shutoff valve for continuity
control module to coolant
shutoff valve for continuity
Connect special tool 9637 to
wiring harness (DME control
module plug)
module plug)
Remove connector of coolant
shutoff valve
Measure resistance between
special tool 9637 plug IV Pin 40
and coolant shutoff valve plug
Pin 2
0 - 5
and coolant shutoff valve plug
Pin 2
0 - 5
⇒
Step 3
Repair wiring harness
→
End
3 Replace DME control module
⇒ Step 4
4 Perform adaptation
Switch on the ignition
Wait one minute
Do not press the accelerator
Switch off the ignition for at
least 10 seconds
Read out the fault memory
→
End
DME 7.8 DME 7.8
P1656
0-197
page 2
p1656
0
Printed in Germany, 2000
575 Coolant shutoff valve - below limit
Diagnosis conditions
・
Engine running
・
Battery voltage greater than 7 V
・
Coolant temperature greater than 90 °C or ATF temperature >
85
°C
Possible fault cause
Wiring harness
DME control module
Affected terminals
Terminal IV/40
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check wiring from DME
control module to colant
shutoff valve for short to
ground
control module to colant
shutoff valve for short to
ground
Connect special tool 9637 to
wiring harness (DME control
module plug)
module plug)
Remove connector of coolant
shutoff valve
Measure resistance between
special tool 9637 plug IV Pin 40
and coolant shutoff valve plug
Pin 2
and coolant shutoff valve plug
Pin 2
∞
⇒
⇒
Step 2
Repair wiring harness
→
End
2 Replace DME control module
⇒ Step 3
3 Perform adaptation
Switch on the ignition
Wait one minute
Do not press the accelerator
Switch off the ignition for at
least 10 seconds
Read out the fault memory
→
End
DME 7.8
Thread Starter
|
Registered User
Joined: Jul 2005
Posts: 3,771
From: Seattle WA
Rep Power: 225
Thanks guys. I just got off the phone with Stephen at AI and theh gt2 program was loaded onto my ecu instead of the 996 tt program. So I will resend the ecu to AI on Monday and have the correct file installed. This will take care of the code and the lights. Now I'm just waiting for the silicone boost hoses.
Jags
Jags
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