| Model: | 240 2.3L 740 2.3L 740 2.3L Turbo 940 2.3L/Turbo |
| Year: | 1992-95 |
| Engine identification: | B200F, B200FT, B200G, B204E, B204FT, B230F, B230FB, B230FD, B230FK, B230FT, B230FX, B234~ B52045, B52545 |
| System: | Bosch LH-Jetronic 2.4/3.2 |
General information
- Trouble codes are displayed by the LED on the data link connector (DLC).
- The fuel/ignition/turbocharger control module fault memory can also be checked and erased using diagnostic equipment connected to the data link connector (DLC).
Accessing
Fuel system
- Ensure ignition switched OFF.
- Open cover on black data link connector (DLC).
- Insert selector cable in socket 2 [1] [1].
- Switch ignition ON.
- Depress test button for approximately 1 second [1] [2].
- Count LED flashes [1] [3]. Note trouble code.
- Each trouble code consists of three groups of flashes [2]
- A 3 second pause separates each group [2] [A].
- For example: Trouble code 223 displayed [2] -idle air control (lAC) valve.
- Repeat switch operation [1] [2]. Note trouble codes. Compare with trouble code table.
- Switch ignition OFF. Rectify faults as necessary.
NOTE: Maximum of 3 trouble codes can be stored by memory at one time.
Ignition system
- Ensure ignition switched OFF.
- Open cover on black data link connector (DLC).
- Insert selector cable in socket 6 [3] [1].
- Switch ignition ON.
- Depress test button for approximately 1 second [3][2].
- Count LED flashes [3]. Note trouble code.
- Trouble codes are displayed in the same way as those from the fuel system:
o Each trouble code consists of three groups of flashes [2]o A 3 second pause separates each group [2] [A].o For example: Trouble code 223 displayed H – idle air control (lAC) valve.
- Repeat switch operation 3 [2]. Note trouble codes. Compare with trouble code table.
- Switch ignition OFF. Rectify faults as necessary.
NOTE: Maximum of 3 trouble codes can be stored by memory at one time.
Turbocharger (Te) system – B204FT
- Ensure ignition switched OFF.
- Open cover on black data link connector (DLC).
- Insert selector cable in socket 5 [4] [1].
- Switch ignition ON.
- Depress test button for approximately 1 second [4] [2].
- Count LED flashes [4] [3]. Note trouble code.
- Trouble codes are displayed in the same way as those from the fuel system:
o Each trouble code consists of three groups of flashes [2].o A 3 second pause separates each group [2] [A].o For example: Trouble code 223 displayed [2] – idle air control (lAC) valve.
- Repeat switch operation [4] [2]. Note trouble codes. Compare with trouble code table.
- Switch ignition OFF. Rectify faults as necessary.
NOTE: Maximum of 7 trouble codes can be stored by memory at one time.
Erasing
- Ensure ignition switched OFF.
- Insert selector cable:
o Fuel system- in socket 2 D [1].o Ignition system- in socket 6 f) [1].o TC system – in socket 5 a [1].
- 1 Access trouble codes.
NOTE: Trouble codes must be displayed at least once before they can be erased.
- Depress test button for approximately 5 seconds.
- Release test button.
- Wait for LED to illuminate.
- Depress test button for approximately 5 seconds.
- Release test button.
- Depress test button for approximately 1 second.
- Ensure trouble code 111 displayed.
Trouble code identification
| Flash code | Fault location | Probable cause |
| 111 | No fault found | – |
| 112 | Engine control module (ECM) | ECM |
| 113 D | Fuel trim (FT) – too weak/rich | Intake leak/blockage, excessive fuel in engine oil, fuel pressure, wiring, MAF sensor, H02S |
| 113 f) | Fuel trim (FT) – too weak | Intake leak, fuel pressure low, wiring, MAF sensor, H02S |
| 121 | Mass air flow (MAF) sensor | Wiring, MAF sensor |
| 123 | Engine coolant temperature (ECT) sensor | Wiring, ECT sensor |
| 131 D | Ignition control module (ICM) – engine RPM signal | Wiring |
| 131 a | Engine speed (RPM) sensor- no signal | Wiring, air gap, RPM sensor |
| 132 | Engine control module (ECM) – supply voltage low/high | Battery, alternator |
| 133 | Throttle position (TP) switch – CTP contacts | TP switch adjustment, accelerator cable adjustment, wiring, TP switch |
| 142 | Ignition control module (ICM) | ICM |
| 143 | Knock sensor (KS) 1 | Wiring, KS |
| 144 | Engine control module (ECM) – load signal | Wiring, ECM |
| 154 | Exhaust gas recirculation (EGR) system – excessive flow detected | Wiring, EGR valve, EGR control module, engine coolant thermostat |
| 212 | Heated oxygen sensor (H02S) | Wiring, heating inoperative, MAF sensor, H02S |
| 213 | Throttle position (TP) switch – WOT contacts | TP switch adjustment, accelerator cable adjustment, wiring, TP switch |
| 214 | Engine speed (RPM) sensor – intermittent signal | Wiring, flywheel/drive plate damaged, air gap, RPM sensor |
| 221 | Fuel trim (FT), part load – too weak | Intake/exhaust leak, fuel pressure, wiring, MAF sensor, H02S |
| 223 | Idle air control (lAC) valve | Wiring, lAC valve |
| 224 | Engine coolant temperature (ECT) sensor | Wiring, ECT sensor |
| 231 D | Fuel trim (FT), part load – too weak/rich | Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, HOiZS |
| 231 H | Fuel trim (FT), part load – too rich | Fuel pressure high, excessive fuel in engine oil, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S |
| 232 | Fuel trim (FT), idling – weak/rich | Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S |
| 234 | Throttle position (TP) switch – CTP contacts | TP switch adjustment, accelerator cable adjustment, wiring, TP switch |
| 241 | Exhaust gas recirculation (EGR) system – insufficient flow detected | Hose leak/blockage, wiring, EGR valve, EGR control module, EGRT sensor, engine coolant thermostat |
| 242 | Turbocharger (TC) wastegate regulating valve | Wiring, TC wastegate regulating valve |
| 311 | Vehicle speed sensor (VSS) | Wiring, speedometer, VSS |
| 312 | Ignition control module (ICM) – KS signal missing | Wiring, ICM |
| 314 | Camshaft position (CMP) sensor- no/incorrect signal | Wiring, CMP sensor |
| 322 | Mass air flow (MAF) sensor – no filament burn- off signal | Wiring, ECM |
| 324 | Camshaft position (CMP) sensor- intermittent signal | Wiring, CMP sensor |
| 342 | NC compressor clutch cut-off relay | Wiring, A/C compressor clutch cut-off relay |
| 344 | Exhaust gas temperature sensor | Wiring, EGRT sensor |
| 411 | Throttle position (TP) sensor | Wiring, TP sensor |
| 413 | Exhaust gas recirculation temperature (EGRT) sensor | Wiring, EGRT sensor |
| 421 | Manifold absolute pressure (MAP) sensor | Hose leak/blockage, Turbocharger (TC), TC control module |
| 422 1:1 | Exhaust gas temperature sensor | Wiring, exhaust gas temperature sensor |
| 423 | Throttle position (TP) sensor | Wiring, TP sensor |
| 424 | Engine control module (ECM) – load signal | Wiring, ECM if trouble code also stored in ICM |
| 431 | Engine coolant blower motor temperature sensor | Wiring, engine coolant blower motor temperature sensor |
| 432 | Engine control module (ECM) – overheating | Engine coolant blower motor, air supply blocked, module cooling fan |
| 433 | Knock sensor (KS) 2 | Wiring, KS |
| 512 | Fuel trim (FT) – too rich | Intake blockage, excessive fuel in engine oil, fuel pressure high, wiring, MAF sensor, H02S |
| 513 | Engine control module (ECM) – overheating | Engine coolant blower motor, air supply blocked, module cooling fan |