General Information
- Trouble codes are displayed by the malfunction indicator lamp (MIL)
- Engine control module (ECM) incorporates self-diagnosis function
Accessing Trouble Codes
- Ensure ignition switched OFF
- Join together the service check connector terminals Civic Image 1 [1] Prelude Image 1 [2]
- Switch ignition ON.
- MIL should flash
- Trouble codes 1-9 are indicated as follows:
- Individual short flashes display trouble code
- A short pause separates each flash
- A long pause separates each trouble code
- Trouble codes greater than 9 are indicated as follows:
- Long flashes indicate the ‘tens’ of the trouble code
- Short flashes indicate the ‘units’ of the trouble code
- A short pause separates each flash
- A long pause separates each trouble code
- Count MIL flashes and compare with trouble code table below
- Switch ignition OFF
- Disconnect the service check connector terminals
Clearing Trouble Codes
- After the faults have been rectified, erase the trouble codes as follows:
- Ensure ignition switched OFF
- Civic – remove fuse No.32 (7.5A) from underhood fusebox for 10 seconds minimum
- Prelude – remove fuse No.43 (10A) from underhood fusebox for 10 seconds minimum
- Reinstall fuse
- Repeat accessing procedure to ensure no data remains in ECM fault memory
Trouble Codes
92-95 Civic 8V/16V Engine Code: D15B7/B8 92-95 Civic 1.5/1.6L Engine Code: D15Z1/D16Z693 93 Civic del Sol 1.5L/1.6L Engine Code: D15B7/D16Z6 92-95 Prelude 2.2L Engine Code: F22A1/H22A1 92-95 Prelude 2.3L Engine Code: H23A1 | ||||
|---|---|---|---|---|
| Trouble code | Fault location | Probable Cause | ||
| 0 | Engine control module (ECM) | Wiring, ECM | ||
| 1 | Heated oxygen sensor (H02S) | Fuel system, wiring, H02S, ECM | ||
| 3 | Manifold absolute pressure (MAP) sensor | Wiring, MAP sensor, ECM | ||
| 4 | Engine speed (RPM) sensor | Wiring, RPM sensor, ECM | ||
| 5 | Manifold absolute pressure (MAP) sensor | Hose leak | ||
| 6 | Engine coolant temperature (ECT) sensor | Wiring, ECT sensor, ECM | ||
| 7 | Throttle position (TP) sensor | Wiring, TP sensor, ECM | ||
| 8 | Crankshaft position (CKP) sensor | Wiring, CKP sensor, ECM | ||
| 9 | Camshaft position (CMP) sensor | Wiring, CMP sensor, ECM | ||
| 10 | Intake air temperature (IAT) sensor | Wiring, lAT sensor, ECM | ||
| 12 | Exhaust gas recirculation (EGR) system | Hose leak/blockage, wiring, EGR valve/position sensor, EGR solenoid, ECM | ||
| 13 | Barometric pressure (BARO) sensor | ECM | ||
| 14 | Idle air control (lAC) valve | Wiring, lAC valve, ECM | ||
| 15 | Ignition output signal | Wiring, ICM, ECM | ||
| 16 | Injectors | Wiring, injectors, ECM | ||
| 17 | Vehicle speed sensor (VSS) | Wiring, VSS, ECM | ||
| 19 | Lock-up control solenoid valve (AT) | Wiring, lock-up control solenoid valve, ECM | ||
| 20 | Electrical load sensor | Wiring, electrical load sensor, ECM | ||
| 21 | VTEC system – malfunction | Wiring, VTEC solenoid, ECM | ||
| 22 | VTEC system – malfunction | Wiring, VTEC pressure switch, ECM | ||
| 23 | Knock sensor (KS) | Wiring, KS, ECM | ||
| 30 | AT signal A | Wiring, ECM | ||
| 31 | AT signal B | Wiring, ECM | ||
| 41 | Oxygen sensor heater | Wiring, H02S, ECM | ||
| 43 | Heated oxygen sensor (H02S)/fuel supply system | Fuel system, wiring, H02S, ECM | ||
| 48 | Heated oxygen sensor (H02S) | Wiring, H02S, ECM | ||