A4 B7 1.8t not engine start

[bad8008]

I'm looking for 2nd opinion since I suspect its the car battery.
Wife's A4 won't crank, blinking at the transmission lights at the instrument cluster.
After some time leaving the ignition on, the blinks disappear and engine able to crank and start. This happens intermittently.

I did diagnosing and got this faults;-

Address 01: Engine
17925 - Power Supply Relay for ECU (J271 or J363): Electrical Malfunction
P1517 - 008 - Implausible Signal - Intermittent

Address 02: Auto Trans
005975 - Supply Voltage: Open Circuit
P1757 - 000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 37
Time Indication: 0

Freeze Frame:
RPM: 96 /min
RPM: 0 /min
(no units): 1.0
Torque: 0.0 Nm
Temperature: 79.0°C
T.B. Angle: 0.0°
Bin. Bits: 0101 0 0

049408 - No Communication with Engine Control Module (SAE:ECM/PCM)
U0100 - 000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 138
Time Indication: 0

Freeze Frame:
RPM: 96 /min
RPM: 0 /min
(no units): 1.0
Torque: 0.0 Nm
Temperature: 79.0°C
T.B. Angle: 0.0°
Bin. Bits: 0101 0 0


Anyone can help?

I made a post on audiworld too.

[Greg_S]

Could it be some damp getting into connectors in the cold weather?

[Ian Simmonds]

Could it be some damp getting into connectors in the cold weather?

It's 31 degrees in Brunei..

[bad8008]

Could it be some damp getting into connectors in the cold weather?

possibly. but most unlikely....

It's 31 degrees in Brunei..

agree totally to that...

[bad8008]

the error codes pointed to the J271 or J363... where is that thing located..??

[Greg_S]

possibly. but most unlikely....

agree totally to that...

DOH!! Should have checked that first

[bad8008]

the car manage to start after about 15mins of ignition on.

i wonder where is that relay located...