ME9 / P2232 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 2 Signal Circuit Short to Heater Circuit
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage should be between 10.7 and 18 Volts. |
| Preheating circuit in normal operating range for more than 20 seconds. |
| Calculated exhaust temperature between 250°C and 800°C. |
Fault criteria:
| Voltage across the sensor increases by more than 2 V over 1 second when preheating is off. The diagnostic trouble code is generated if this occurs 4 out of 6 times when preheating is off. |
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 component. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
