Coolant Pump 1a CAN node timeout
• Check that M38-A and M38-B are connected. • Check that C443 and C438 are connected. • Check that E81-B is connected. • Check that E81-B11 have contact with M38-A1 and that E81-B14 have contact with M38-A6. • Change the Coolant Pump 1 (M38)
What you'll see
No driver-visible symptom recorded.
System reaction
• Coolant Pump 1 runs for 100% • Amber warning lamp "Hybrid System Fault" is shown in ICL
Diagnostic depth
The DTC is set active if CAN message from the Coolant Pump 1 has been absent for 200 ms. The DTC is set inactive when Coolant Pump RES CAN message is received. The DTC is not set in the following cases: • ignition is turned off • first 2 seconds after ignition on • system voltage is below 22 volt • system voltage is above 32 volt • short circuit or open circuit on the RES CAN bus (separate DTCs)
• Bad connection to the pump • Pump disconnected from the RES CAN-bus • Pump is faulty