AHM/PHM / B1425 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Poor cabin heating
Heater does not start.
Voltage shutoff Overvoltage
Fault symptom
Poor cabin heating
Heater does not start.
On-board diagnosis
Type of diagnosis:
Enable criteria:
Fault criteria:
Voltage on control module input exceeds 16.1 V. |
System reaction to a fault:
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Diagnosis regards:
Electrical fault in connecting leads or components. |
Functions in the diagnostic tool related to the fault:
See Reading:
Battery Voltage |