USING DIAGNOSTIC CHARTS
Use following illustrations to understand diagnostic charts and identify symbols used. (Scheme 67)- (Scheme 69).
Scheme 67
Scheme 68
Scheme 69
SELF-DIAGNOSTIC SYSTEM
Note. For aid in using diagnostic charts, see USING DIAGNOSTIC CHARTS .
Note. Diagnostic trouble codes can be retrieved from many different modules. Codes and testing listed in this article are for codes retrieved from the diagnostic module. To retrieve diagnostic trouble codes, see RETRIEVING DIAGNOSTIC TROUBLE CODES .
DIAGNOSTIC TROUBLE CODE MEMORY (SECTION 11)
Note. DTC readout using the impulse counter scan tool or via the LED pushbutton switch, has been eliminated. During the DTC readout, the CHECK ENGINE MIL, stays on continuously.
Diagnostic module (OBD II< N59/1) uses 2 different plug connectors for DTC readout
- 16-pin OBD II connector (X11/22). (Scheme 71)
- 38-pin data link connector (X11/4). (Scheme 72)
In case of DTC P0131 and P0133, the exact cause of the fault in oxygen sensor 1 (O2S 1) can be read via MODE 5 with the generic scan tool. To do so, the following codes must be entered in the generic scan tool
- DTC P0131 Code JD 4A HEX
- DTC P0133 Code JD 7E HEX
CLEARING DIAGNOSTIC TROUBLE CODES
The retained diagnostic trouble code (DTC) memory feature of the diagnostic module has been replaced with DTC memory which is cleared after disconnecting the vehicle's battery.
DIAGNOSTIC TROUBLE LIST
Note. Observe Preparation for Test, see PREPARATION FOR TEST (SECTION 22) .
| DTC | Possible Cause | Test step/Remedy |
|---|---|---|
| P0101 | Mass or volume air flow circuit range/performance problem (Hot film MAF sensor (B2/5) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0105 | Manifold absolute pressure implausible | 11.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 10.0-11.1) |
| P0111 | Intake air temperature circuit range/performance problem (IAT sensor (B17)) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0116 | Engine coolant temperature circuit range/performance problem (ECT sensor (B11/3)) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0125 | Insufficient coolant temperature for closed loop fuel control | Engine coolant temperature sensor (B11/3) |
| P0131 | O2S 1 (before TWC) (G3/2) circuit low voltage | 4.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P0132 | O2S 1 (before TWC) (G3/2) circuit high voltage | 4.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P0133 | O2S 1 (before TWC) (G3/2) circuit slow response | Damage to TWC 4.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P0134 | O2S 1 (before TWC) (G3/2) circuit no activity detected | 4.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P0135 | O2S 1 (before TWC) (G3/2) heater circuit malfunction | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0138 | O2S 2 (after TWC) (G3/1) circuit high voltage | 5.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P0141 | O2S 2 (after TWC) (G3/1) heater circuit malfunction | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0170 | Fuel trim malfunction (self-adaptation of fuel mixture) | Unmetered air, injectors (Y62), Diaphragm pressure regulator, Hot film mass air flow sensor (B2/5), Engine wear (reset self-adaptation after repairs. See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0200 | Injector circuit malfunction | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P030x | TWC protection single cylinder misfire (Single cylinder ignition misfire within 200 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM |
| P030x | FTP standards single cylinder misfire (Single cylinder ignition misfire within 1000 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM |
| P030x | I/M test single cylinder misfire (Single cylinder ignition misfire within 1000 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM |
| P0300 | TWC protection random cylinder misfire (Random cylinder ignition misfire within 200 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0300 | FTP standards random cylinder misfire (Random cylinder ignition misfire within 1000 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0300 | I/M test Random cylinder misfire (Random cylinder ignition misfire within 1000 engine revolutions) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0325 | Knock sensor 1; control range and stop | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0326 | Knock sensor 1; circuit performance | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0327 | Knock sensor 1; sensor signal | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0335 | CKP sensor circuit malfunction | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0341 | CMP sensor (L5/1) or camshaft Hall-effect sensor (B6/1) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0400 | Exhaust gas recirculation flow malfunction | 38.0 - 40.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 38.0-39.0 & SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 40.0-44.0 |
| P0412 | Secondary air injection (AIR) system switching valve/circuit malfunction Model 129, 140: AIR pump switchover valve (Y32) and electromagnetic AIR pump clutch (Y33) Model 210: AIR pump switchover valve (Y32) and AIR relay module (K17) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0420 | Catalyst system efficiency below threshold | Catalyst converter (physical damage) |
| P0441 | EVAP without function (logic chain) | 9.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 8.0-9.0) |
| P0443 | Evaporative emission control system (EVAP) purge control valve circuit malfunction (Purge control valve (Y58/1) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0500 | Vehicle speed signal implausible | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P0501 | Vehicle speed implausible | Engine control module (N3/4) |
| P0505 | Idle control system malfunction | See TESTS W/CODES - ELECTRONIC ACCELERATOR CONTROLS and/or appropriate CRUISE CONTROL SYSTEMS article |
| P0507 | Idle control system RPM higher than expected | See TESTS W/CODES - ELECTRONIC ACCELERATOR CONTROLS and/or appropriate CRUISE CONTROL SYSTEMS article |
| P0510 | CTP information: Air mass implausible | See TESTS W/CODES - ELECTRONIC ACCELERATOR CONTROLS and/or appropriate CRUISE CONTROL SYSTEMS article |
| P0600 | Serial communication link malfunction (CAN) | 13.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Step 13.0) |
| P1131 | O2S 1 (before TWC) (G3/2) circuit short circuit | 4.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P1132 | O2S 1 (before TWC) (G3/2) circuit "rich" stop | Unmetered air, Damage to TWC or O2S |
| P1137 | O2S 2 (after TWC) (G3/1) circuit short circuit | 5.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P1138 | O2S 2 (after TWC) (G3/1) operating condition | 5.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 3.0-5.0) |
| P1170 | Short term fuel trim (self-adaptation of fuel mixture | Unmetered air, injectors (Y62), Diaphragm pressure regulator, Hot film mass air flow sensor (B2/5), Engine wear (reset self-adaptation after repairs. See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1335 | Engine speed signal TNA from diagnostic module (OBD II) not received | 6.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 6.0-7.0) |
| P1336 | CKP sensor signal Magnet coding on segment | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1337 | Engine speed signal TNA not transmitted from engine control module | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1340 | CMP sensor (L5/1) or camshaft Hall-effect sensor (B6/1) monitoring signal from engine control module (N3/4) | 7.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 6.0-7.0) |
| P1341 | Adjustable camshaft timing solenoid (Y49) without function (Logic chain) | 32.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 32.0-34.0 |
| P1342 | Electrical activation of adjustable camshaft timing solenoid (Y49) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1400 | Electrical activation of the EGR switchover valve (Y27) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1411 | Secondary air injection system incorrect flow detected | Hose lines, AIR pump, AIR shut-off valve |
| P1443 | Electrical activation of purge flow switchover valve (Y27/6) | 8.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 8.0-9.0) |
| P1444 | Pressure switchover without function (logic chain) | 10.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 10.0-11.1) |
| P1700 | Transmission upshift delay switchover valve (Y3/3) without function (Logic chain) | Upshift delay switchover valve (Y3/3), A/T control pressure cable adjustment (see SMS) |
| P1701 | Electrical activation of upshift delay switchover valve (Y3/3) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1711 | Electrical activation of resonance intake manifold switchover valve (Y22/6) | See TESTS W/CODES - HFM-SFI SYSTEM article |
| P1740 | Full load information: Load implausible | See TESTS W/CODES - ELECTRONIC ACCELERATOR CONTROLS and/or appropriate CRUISE CONTROL SYSTEMS article |
| P1741 | Full load information: Throttle valve position implausible | See TESTS W/CODES - ELECTRONIC ACCELERATOR CONTROLS and/or appropriate CRUISE CONTROL SYSTEMS article |
| P1750 | Diagnostic module (N59/1) voltage supply from circuit 30 to low | 1.0, see ELECTRICAL SYSTEM TESTS - Section 23 (Steps 1.0-2.1) |
DIAGNOSTIC TROUBLE CODE LIST
Scheme 70
Scheme 71
Scheme 72
PREPARATION FOR TEST (SECTION 22)
- Turn ignition OFF.
- Remove diagnostic module (OBD II, N59/1). On model 140 as of Model Year 1996 remove rear seat cushion and loosen bracket for diagnostic module.
- Connect socket box with test cable according to connecting diagram. (Scheme 73)- (Scheme 77).
