On-Off Ratio Test
ON-OFF RATIO TEST, IGNITION: ON
| On-Off Ratio % | See |
|---|---|
| 0 | Fig 1 |
| 10 | Fig 1 |
| 20 | Fig 1 |
| 30 | Fig 1 |
| 40 | - |
| 50 | Fig 1 |
| 60 | Fig 1 |
| 70 | Fig 1 |
| 80 | Fig 1 |
| 90 | Fig 1 |
ON-OFF RATIO TEST, ENGINE: AT CTP (IDLE)
| On-Off Ratio % | Possible Cause | See |
|---|---|---|
| 0 | Short circuit to battery + in wire to data link connector (X11/4), socket 3. | Fig 4 |
| 10 | CTP (idle) recognition applied constantly. | Fig 2 |
| 20 | Output of fuel injectors or more fuel injectors have open circuit. | Fig 2 |
| 30 | ECT sensor (B11/2). | Fig 2 |
| 40 | Hot wire MAF sensor (B2/2). | Fig 2 |
| 50 | O2S 1 - before TWC (G3/2) not operational or defective, open circuit. | Fig 2 |
| 60 | CMP sensor (L5/1). | Fig 2 |
| 70 | TN-signal (RPM signal). | Fig 2 |
| 80 | CAN-data exchange defective. | Fig 2 |
| 90 | Vehicle Speed Signal (VSS). | Fig 2 |
| 95 | Deceleration Shut-Off Active. | Fig 2 |
| 100 | No voltage at LH-SFI control module (N3/1). | Fig 2 |
LH-SFI CONTROL MODULE DTC READOUT
| DTC | Possible Cause | See |
| 1 | No malfunction in system. | Fig 3 |
| 2 | ECT sensor (B11/2) sensor circuit 1, open/short circuit. | Fig 3 |
| 3 | ECT sensor (B11/2) sensor circuit 2, open/short circuit. | Fig 3 |
| 4 | Voltage at hot wire MAF sensor (B2/2) insufficient of too high, or open circuit in ground wire at hot wire MAF sensor. | Fig 3 |
| 5 | Not Used | - |
| 6 | Not Used | - |
| 7 | TN-signal (RPM signal) incorrect or open/short circuit. | Fig 3 |
| 8 | CMP sensor (L5/1) signal, open/short circuit. | Fig 3 |
| 9 | Starter signal (circuit 50) missing, open/short circuit. | Fig 3 |
| 10 | CTP (idle) recognition from EA/CC/ISC control module (N4/1) or CC/ISC control module (N4/3), short circuit | Fig 3 |
| 11 | Secondary air injection system, open/short circuit. | Fig 3 |
| 12 | Burn off control for hot wire MAF sensor, open/short circuit. | Fig 4 |
| 13 | IAT sensor (B17/7), open/short circuit. | Fig 4 |
| 14 | Not Used | - |
| 15 | Not Used | - |
| 16 | EGR switchover valve (Y27), open/short circuit. | Fig 4 |
| 17 | No CAN data transmission with EA/CC/ISC control module (N4/1) or CC/ISC control module (N4/3). | Fig 4 |
| 18 | No CAN transmission with DI control module (N1/3) | Fig 4 |
| 19 | Not Used | - |
| 20 | No CAN data transmission from LH-SFI control module (N3/1). | Fig 4 |
| 21 | O2S 1 - before TWC (G3/2), open/short circuit. | Fig 4 |
| 22 | O2S 1 heater, open/short circuit. | Fig 5 |
| 23 | Purge control valve (Y58/1), open/short circuit. | Fig 5 28 |
| 24 | Left adjustable camshaft timing solenoid (Y49/2), open/short circuit. | Fig 5 |
| 25 | Adjustable camshaft timing solenoid, engine 104 (Y49) or right adjustable timing solenoid, engine 119 (Y49/2), open/short circuit. | Fig 5 |
| 26 | Upshift delay switchover valve (Y3/3), open/short circuit. | Fig 5 |
| 27 | Injectors (Y62), open/short circuit. | Fig 5 |
| 28 | LH-SFI control module coding, open circuit. | Fig 5 |
| 29 | 1GR start relay module (K29/1), open/short circuit. | Fig 5 |