Engine Control Module S320 (1996)
DIAGNOSTIC TROUBLE CODE LIST
| Generic DTC | Mercedes-Benz DTC | Description | Test step/Remedy |
|---|---|---|---|
| 1 | - | No malfunction in system | |
| 2 | 002 | ECT sensor (B11/3) short circuit | 8.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 8.0 & 8.1 |
| 2 | 003 | ECT sensor (B11/3) open circuit | 8.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 8.0 & 8.1 |
| 2 | 004 | ECT sensor (B11/3) implausible | 8.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 8.0 & 8.1 |
| 2 | 005 | ECT sensor (B11/3) intermittent contact | Contacts in connector of B11/3 or N3/4 |
| 3 | 006 | IAT sensor (B17) short circuit | 9.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 9.0 & 9.1 |
| 3 | 007 | IAT sensor (B17) open circuit | 9.0, see SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM TESTS 9.0 & 9.1 |
| 3 | 008 | IAT sensor (B17) intermittent contact | Contacts in connector of B17 or N3/4 |
| 4 | 009 | Hot film MAF sensor (B2/5) air flow implausibly high | 4.0 - 5.0, see Sequential Multiport Fuel Injection System Tests 3.0-4.0
- Sequential Multiport Fuel Injection System Tests 4.1-7.0 Engine friction excessive. |
| 4 | 010 | Hot film MAF sensor (B2/5) open circuit | 4.0 - 5.0, see Sequential Multiport Fuel Injection System Tests 3.0-4.0 - Sequential Multiport Fuel Injection System Tests 4.1-7.0 |
| 5 | 011 | CTP switch (M16/1s2 or M16/2s2) throttle valve angle implausibly large | 11.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0 |
| 5 | 012 | CTP switch (M16/1s2 or M16/2s2) air flow implausibly high | 11.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0 |
| 5 | 013 | CTP switch (Ma6/1s2 or M16/2s2) intermittent contact | 11.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0 |
| 6 | 014 | Not applicable for U.S.A version vehicles | - |
| 6 | 015 | Not applicable for U.S.A. version vehicles | - |
| 6 | 016 | Not applicable for U.S.A. version vehicles | - |
| 7 | 017 | Not applicable for U.S.A. version vehicles | - |
| 7 | 018 | Not applicable for U.S.A. version vehicles | - |
| 7 | 019 | Not applicable for U.S.A. version vehicles | - |
| 8 | 020 | ISC system at lower control stop | Intake air leak, throttle body binding, CC or EA operating in "limp-home" mode. |
| 8 | 021 | ISC system at upper control stop | Intake air leak, throttle body binding, CC or EA operating in "limp-home" mode. |
| 8 | 022 | CC or EA indicates "limp-home" mode | Intake air leak, throttle body binding. Adjust throttle linkage, erase DTC's in HFM-SFI control module. |
| 9 | 023 | O2S (before TWC) (G3/2) sensor voltage too high | 14.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 9 | 024 | O2S (before TWC) (G3/2) cold or open circuit | 14.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 9 | 025 | O2S1 (before TWC) (G3/2) sensor voltage implausible | 14.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 10 | 026 | Except model 124 O2S 2 (after TWC) (G3/1) sensor voltage too high |
16.0, see Sequential Multiport Fuel Injection System Tests 16.0 |
| 10 | 027 | Except model 124 O2S (after TWC) (G3/1) cold or open circuit |
16.0, see Sequential Multiport Fuel Injection System Tests 16.0 |
| 10 | 028 | Except model 124 O2S (after TWC) G3/1) sensor voltage implausible |
16.0, see Sequential Multiport Fuel Injection System Tests 16.0 |
| 11 | 029 | O2S 1 (before TWC) heater (G3/2) current too low | 15.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 11 | 030 | O2S (before TWC) heater (G3/2) current too high | 15.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 11 | 031 | O2S 1 (before TWC) heater (G3/2) short circuit | 15.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 12 | 032 | Except model 124 O2S 2 (after TWC) heater (G3/1) current too low |
17.0, see Sequential Multiport Fuel Injection System Tests 16.1-18.0 |
| 12 | 033 | Except model 124 O2S 2 (after TWC heater (G3/1) current too high |
17.0, see Sequential Multiport Fuel Injection System Tests 16.1-18.0 |
| 12 | 034 | Except model 124 O2S 2 (after TWC) heater (G3/1) short circuit |
17.0, see Sequential Multiport Fuel Injection System Tests 16.1-18.0 |
| 13 | 035 | O2S system operating at rich limit, mixture too lean | Intake air leak, fuel injectors, diaphragm pressure regulator |
| 13 | 036 | O2S system operating at lean limit, mixture too rich | Intake air leak, fuel injectors, diaphragm pressure regulator |
| 14 | 037 | Injector (Y62y1), cylinder 1 short circuit to plus | 19.0, see Sequential Multiport Fuel Injection System Tests 18.1-19.1 |
| 14 | 038 | Injector (Y62y1), cylinder 1 open/short circuit to ground | 19.0, see Sequential Multiport Fuel Injection System Tests 18.1-19.1 |
| 15 | 039 | Injector (Y62y2), cylinder 2 short circuit to plus | 20.0, see Sequential Multiport Fuel Injection System Tests 20.0-21.0 |
| 15 | 040 | Injector (Y62y2), cylinder 2 open/short circuit to ground | 20.0, see Sequential Multiport Fuel Injection System Tests 20.0-21.0 |
| 16 | 041 | Injector (Y62y3), cylinder 3 short circuit to plus | 21.0, see Sequential Multiport Fuel Injection System Tests 20.0-21.0 |
| 16 | 042 | Injector (Y62y3), cylinder 3 open/short circuit to ground | 21.0, see Sequential Multiport Fuel Injection System Tests 20.0-21.0 |
| 17 | 043 | Injector (Y62y4), cylinder 4 short circuit to plus | 22.0, see Sequential Multiport Fuel Injection System Tests 21.1-22.1 |
| 17 | 044 | Injector (Y62y4), cylinder 4 open/short circuit to ground | 22.0, see Sequential Multiport Fuel Injection System Tests 21.1-22.1 |
| 18 | 045 | Injector (Y62y5), cylinder 5 short circuit to plus | 23.0, see Sequential Multiport Fuel Injection System Tests 23.0-23.1 |
| 18 | 046 | Injector (Y62y5), cylinder 5 open/short circuit to ground | 23.0, see Sequential Multiport Fuel Injection System Tests 23.0-23.1 |
| 019 | 047 | Injector (Y62y6), cylinder 6 short circuit to plus | 24.0, see Sequential Multiport Fuel Injection System Tests 24.0-24.1 |
| 19 | 048 | Injector (Y62y6), cylinder 6 open/short circuit to ground | 24.0, see Sequential Multiport Fuel Injection System Tests 24.0-24.1 |
| 20 | 049 | Self-adaptation at idle speed too rich | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 20 | 050 | Self-adaptation at the idle speed too lean | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 20 | 051 | Self-adaptation at lower partial load too rich | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 20 | 052 | Self-adaptation at lower partial load too lean | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 20 | 053 | Self-adaptation at upper partial load too rich | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 20 | 054 | Self-adaptation at upper partial load too lean | Intake air leak, fuel injectors, diaphragm pressure regulator, engine wear (reset self-adaptation following repair) |
| 21 | 061 | Ignition output 3 or ignition coil (T1/3) for cylinder 1 misfires | 13.0, 16.0 and 19.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 16.0-19.1 |
| 21 | 062 | Ignition output 3 or ignition coil (T1/3) for cylinder 6 misfires | 13.0, 16.0 and 19.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 16.0-19.1 |
| 21 | 063 | Ignition output 3 or ignition coil (T1/3) current value not obtained | 13.0, 16.0 and 19.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 16.0-19.1 |
| 22 | 055 | Ignition output 1 or ignition coil (T1/1) for cylinder 2 misfires | 11.0, 14.0 and 17.0, see Ignition System Tests 9.0-11.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 22 | 056 | Ignition output 1 or ignition coil (T1/1) for cylinder 5 misfires | 11.0, 14.0 and 17.0, see Ignition System Tests 9.0-11.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 22 | 057 | Ignition output 1 or ignition coil (T1/1) current value not obtained | 11.0, 14.0 and 17.0, see Ignition System Tests 9.0-11.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 23 | 058 | Ignition output 2 or ignition coil (T1/2) for cylinder 3 misfires | 12.0, 15.0 and 18.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 23 | 059 | Ignition output 2 or ignition coil (T1/2) for cylinder 4 misfires | 12.0, 15.0 and 18.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 23 | 060 | Ignition output 2 or ignition coil (T1/2) current value not obtained | 12.0, 15.0 and 18.0, see Ignition System Tests 12.0-13.0 , Ignition System Tests 14.0-15.1 and Ignition System Tests 16.0-19.1 |
| 24 | 064 | CKP sensor (L5) signal not recognized/implausible | 7.0, see Ignition System Tests 7.0-8.2 |
| 24 | 065 | CKP sensor (L5) magnet is missing (segment control) CKP sensor (L5) number of teeth implausible (increment control) |
7.0, see Ignition System Tests 7.0-8.2 |
| 24 | 066 | CKP sensor (L5) RPM implausibly high | 7.0, see Ignition System Tests 7.0-8.2 |
| 25 | 067 | CMP sensor (L5/1) implausible/not recognized (segment control) | 8.0, see Ignition System Tests 7.0-8.2 |
| 25 | 067 | Camshaft Hall-effect sensor (B6/1) implausible/not recognized (increment control) | 9.0, see Ignition System Tests 9.0-11.0 |
| 26 | 068 | Not applicable for U.S.A. version vehicles | - |
| 26 | 069 | Not applicable for U.S.A. version vehicles | - |
| 27 | 070 | TN-signal output (RPM signal), short circuit to ground | 10.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0 |
| 27 | 071 | TN-signal output (RPM signal), short circuit to plus | 10.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0 |
| 28 | 072 | VSS not recognized | 27.0, see Sequential Multiport Fuel Injection System Tests 25.0-28.0 |
| 28 | 073 | VSS implausibly high | 27.0, see Sequential Multiport Fuel Injection System Tests 25.0-28.0 |
| 29 | 075 | Not applicable for U.S.A. version vehicles | - |
| 30 | 076 | FP relay module (K27) open/short circuit | 6.0, see Sequential Multiport Fuel Injection System Tests 4.1-7.0 |
| 31 | 077 | Not applicable for U.S.A. version vehicles | - |
| - | 078 | Not applicable for U.S.A. version vehicles | - |
| 32 | 079 | KS 1 (A16) open circuit | Replace knock sensors (KS) |
| 32 | 080 | KS 2 (A16) open circuit | Replace knock sensors (KS) |
| 33 | 081 | Maximum retard setting on at least one cylinder has been reached | Increased tendency to knock due to poor fuel quality, combustion chamber carbon build-up or mechanical damage. |
| 33 | 082 | Ignition angle deviation between the individual cylinders is > 6° CKA | Increased tendency to knock due to poor fuel quality, combustion chamber carbon build-up or mechanical damage |
| 34 | 083 | Knock control evaluation circuit in engine control module (N3/4) defective | N3/4 |
| - | 084 | Momentary fault in self-adaptation of closed throttle speed/partial load | Momentary malfunction in fuel mixture preparation |
| 35 | 085 | Model 124, 129 and 140: AIR pump switchover valve (Y32) and/or electromagnetic AIR pump clutch (Y33) Model 202: AIR pump switchover valve (Y32) and/or AIR relay module (K17) open/short circuit |
28.0, see Sequential Multiport Fuel Injection System Tests 25.0-28.0 |
| 36 | 086 | Purge control valve (Y58/1) open/short circuit | 29.0 - 30.0, see Sequential Multiport Fuel Injection System Tests 28.1-29.1 , Sequential Multiport Fuel Injection System Tests 30.0-31.1 |
| 36 | 087 | Purge control valve (Y58/1) short circuit to plus | 29.0 - 30.0, see Sequential Multiport Fuel Injection System Tests 28.1-29.1 , Sequential Multiport Fuel Injection System Tests 30.0-31.1 |
| 37 | 088 | Upshift delay switchover valve (Y3/3) open/short circuit | 34.0, see Sequential Multiport Fuel Injection System Tests 32.0-34.0 |
| 38 | 089 | Adjustable camshaft timing solenoid (Y49) short circuit to plus | 31.0 - 32.0, see Sequential Multiport Fuel Injection System Tests 30.0-31.1 - Sequential Multiport Fuel Injection System Tests 32.0-34.0 |
| 38 | 090 | Adjustable camshaft timing solenoid (Y49) open/short circuit to ground | 31.0 - 32.0, see Sequential Multiport Fuel Injection System Tests 30.0-31.1 - Sequential Multiport Fuel Injection System Tests 32.0-34.0 |
| 39 | 091 | EGR switchover valve (Y27) short circuit to plus | 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 |
| 39 | 092 | EGR switchover valve (Y27) open/short circuit to ground | 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 |
| 40 | 093 | Transmission overload protection switch (S65) short circuit to ground | 10.0, see Ignition System Tests 9.0-11.0 |
| 40 | 094 | Transmission overload protection switch (S65) closed and 2nd gear recognized | 10.0, see Ignition System Tests 9.0-11.0 |
| 40 | 095 | Transmission overload protection switch (S65) open and 2nd gear recognized | 10.0, see Ignition System Tests 9.0-11.0 |
| 40 | 096 | Transmission overload protection switch (S65) implausible | 10.0, see Ignition System Tests 9.0-11.0 |
| 41 | 097 | CAN communication from engine control module (N3/4) defective | 37.0, see Sequential Multiport Fuel Injection System Tests 36.1-37.0 |
| 42 | 098 | CAN communication from ASR control module (N30/1) defective | 36.0, see Sequential Multiport Fuel Injection System Tests 35.0-36.0 |
| 42 | 099 | CAN communication from EA/CC/ISC control module (N4/1) or CC/ISC control module (N4/3) defective | 36.0, see Sequential Multiport Fuel Injection System Tests 35.0-36.0 |
| 42 | 100 | CAN communication from diagnostic module (OBD II) (N59/1) defective | 36.0, see Sequential Multiport Fuel Injection System Tests 35.0-36.0 |
| 43 | 101 | Starter signal (circuit 50) not present | 7.0, see Sequential Multiport Fuel Injection System Tests 4.1-7.0 |
| 44 | 102 | Not applicable for U.S.A. version vehicles | - |
| 44 | 103 | Not applicable for U.S.A. version vehicles | - |
| 45 | 104 | Fuel safety shut-off of electronic accelerator or cruise control active | 12.0, see Sequential Multiport Fuel Injection System Tests 10.0-12.0
, 13.0, see Sequential Multiport Fuel Injection System Tests 13.0-15.1 |
| 46 | 105 | Resonance intake manifold switchover valve (Y22/6) short circuit to plus | 33.0, see Sequential Multiport Fuel Injection System Tests 32.0-34.0 |
| 46 | 106 | Resonance intake manifold switchover valve (Y22/6) open/short circuit to ground | 33.0, see Sequential Multiport Fuel Injection System Tests 32.0-34.0 |
| - | 107 | Control of ignition coil preloading voltage exceeds limits | 14.1 and 15.1, see Ignition System Tests 14.0-15.1 Engine control module (N3/4) |
| 48 | 108 | O2S 2 (after TWC) heater relay module (K35) short circuit to plus | 18.0, see Sequential Multiport Fuel Injection System Tests 16.1-18.0 |
| 48 | 109 | O2S (after TWC) heater relay module (K35) open/short circuit to ground | 18.0, see Sequential Multiport Fuel Injection System Tests 16.1-18.0 |
| 49 | 110 | Voltage supply circuit 87 U at engine control module (N3/4) implausible | 2.0, see Sequential Multiport Fuel Injection System Tests 2.0-2.2 |
| 49 | 111 | Voltage supply circuit 87 U at engine control module (N3/4) low voltage | 2.0, see Sequential Multiport Fuel Injection System Tests 2.0-2.2 |
| 50 | 112 | Engine control module (N3/4) | N3/4 |
| - | 113 | Engine control module (N3/4) not coded | Code N3/4 |
| - | 114 | Engine control module identification of N3/4 faulty | Code N3/4, if necessary, replace N3/4 |
| - | 115 | engine control module code bytes of N3/4 faulty | Code N3/4, if necessary, replace N3/4 |
| - | 116 | CAN communication from RCL control module (N54) faulty | 36.1, see |
| - | 117 | Engine starts with RCL system locked | Incorrect operation, clear DTC memory |
| - | 120 | Not applicable for U.S.A. version vehicles | - |
| - | 121 | Not applicable for U.S.A. version vehicles | - |
| - | 122 | Not applicable for U.S.A. version vehicles | - |
| - | 125 | Engine control module (N3/4) | N3/4 |
| - | 126 | Engine control module (N3/4) | N3/4 |
| - | 127 | ISC and CC/ISC actuators interchanged | Replace actuator |
| - | 128 | Engine control module (N3/4) | N3/4 |
| - | 129 | Engine control module (N3/4) | N3/4 |
| - | 130 | Not applicable for U.S.A. version vehicles | - |
| - | 131 | Engine control module (N3/4) | N3/4 |
| - | 132 | Engine control module (N3/4) | N3/4 |
| - | 133 | EA/CC/ISC or CC/ISC actuator | Perform learning process on engine control module with HHT. If the fault is still present, replace actuator |
| - | 134 | Engine control module (N3/4) | N3/4 |
| - | 135 | Not applicable for U.S.A version vehicles | - |
| - | 136 | Not applicable for U.S.A version vehicles | - |
| - | 137 | Engine control module (N3/4) | N3/4 |
| - | 138 | EA/CC/ISC or CC/ISC actuator | Perform learning process on engine control module with HHT. If the fault is still present, replace actuator. |
| - | 139 | Not applicable for U.S.A. version vehicles | - |
| - | 140 | Engine control module (N3/4) | N3/4 |
| 141 | Engine control module (N3/4) | N3/4 | |
| 142 | Engine control module (N3/4) | N3/4 | |
| - | 143 | Not applicable for U.S.A. version vehicles | - |
| - | 144 | Engine control module (N3/4) | N3/4 |