F0:DATA LIST
| No. | TECH 1 Display | Conditions for Checking | Nominal Value | Trouble Codes | Terminal |
37
| O2 SENSOR |
|---|
| Engine running at idle speed, operating temperature |
Switch off all
consumers
| Voltage change |
between
0 and 1 000 mV
| 13, 38, 39 | |
|---|---|
| 28, 10 | |
| Notes on Trouble-shooting: | Nominal Value: |
| Cause of Fault: |
· Ignition ON
· Disconnect oxygen sensor wiring harness plug
| · Measure voltage between oxygen sensor plug | ||
|---|---|---|
| P 32 / Ter. C and Ter. A on control unit side | 400 to 500 mV | · Short circuit or lead interruption from |
- control unit K 61 / Ter. 28 to oxygen sensor P 32 / Ter. C
- control unit K 61 / Ter. 10 to ground
- oxygen sensor P 32 / Ter. A to ground
| · Allow engine to run at 1200 to 1600 rpm at coolant temperature = 85 °C/185 ° | |
|---|---|
| · Measure voltage at Ter. C to Ter. A with engine running (using adapter lead) | Voltage change |
| between 0 and 1000 mV | · Mixture constantly too rich |
(see test step 38)
· Mixture constantly too lean
(see test step 38)
| · Measure voltage at Ter. B to Ter. A (using adapter lead) | 11.5 to 13.5 V | · Oxygen sensor heating defective |
· Lead interruption from
- K 68 / Ter. 4 to oxygen sensor
P 32 / Ter. B
- oxygen sensor P 32 / Ter. A to ground
· Oxygen sensor P 32 defective
· Control unit K 61 defective