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Diagnostic Manual, Engines, Volume 3

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8.4 Diagnostic Module (DM) > 11 Diagnosis - Diagnostic Trouble Code (DTC) Memory

Diagnosis - Diagnostic Trouble Code (DTC) Memory

Preparation for recalling diagnostic trouble code (DTC) memory
1. Connect impulse counter scan tool and adaptor for impulse counter to test connection for diagnosis (X11/4) according to connection diagram (see section 0).
Note:
Connect impulse counter scan tool as follows:
red wire to socket 16,
black wire to socket 1 and
yellow wire to:

Diagnostic module socket 3
Engine control module socket 8
EA/CC/ISC control module socket 14

2. Recall control modules' diagnostic trouble code memory and clear stored trouble codes (see section 0).

Note
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 (DM voltage supply).
In addition, the DTC readout "1" (no malfunction in system) does not appear after clearing the DTC memory (disconnecting the vehicle's battery). DTC readout "1" only reappears during the vehicle's subsequent trip after the diagnostic module has confirmed that all monitored systems and their respective components are ok
(no malfunctions).

Diagnostic Trouble Code (DTC) Readout, Diagnostic Module

Diagnostic Trouble Code (DTC) Possible Cause Remedy/Test Step 1)

1 No malfunction in systems monitored -

2 Heated oxygen sensor inoperative Test HFM-SFI, Engines Vol.2, section 1.

3 Lambda control inoperative Test HFM-SFI, Engines Vol.2, section 1

4 Air injection inoperative Test HFM-SFI, Engines Vol.2, section 1

5 Exhaust gas recirculation inoperative Test HFM-SFI, Engines Vol.2, section 1

6 Idle speed control inoperative Test EA/CC/ISC, sections 6/7.

7 Ignition system defective Test HFM-SFI, Engines Vol.2, section 1

8 Engine coolant temperature sensor, open/short circuit Test HFM-SFI, Engines Vol.2, section 1

9 Intake air temperature sensor, open/short circuit Test HFM-SFI, Engines Vol.2, section 1

10 Voltage at hot wire mass air flow sensor too high/low Test HFM-SFI, Engines Vol.2, section 1

11 TN-signal (rpm) at engine control module (N3/4) defective Test HFM-SFI, Engines Vol.2, section 1

12 Heated oxygen sensor heater, open/short circuit Test HFM-SFI, Engines Vol.2, section 1

16 Closed throttle position information defective Test EA/CC/ISC, section 6/7.

17 Data exchange malfunction between individual control modules 23 6.0.

18 Adjustable camshaft timing solenoid, open/short circuit Test HFM-SFI, Engines Vol.2, section 1

19 Fuel injectors open/short circuit or
self-adaptation in engine control module (N3/4) at limit Test HFM-SFI and reset engine control module adaptation to mean value, Engines, Vol. 2, section 1

20 Speed signal not present Test HFM-SFI, Engines Vol.2, section 1

21 Purge switchover valve, open/short circuit Test HFM-SFI, Engines Vol.2, section 1

22 Camshaft position sensor signal defective Test HFM-SFI, Engines Vol.2, section 1

23 Intake manifold pressure (in base module pressure sensor- B5/2) with engine running too low/high 23 7.0.

24 Starter ring gear segments and/or crankshaft position sensor defective Test HFM-SFI, Engines Vol.2, section 1

25 Knock sensors or engine control module defective Test HFM-SFI, Engines Vol.2, section 1

26 Upshift delay defective Test HFM-SFI, Engines Vol.2, section 1

27 Not used -

28 Engine coolant temperature sensor (coolant temperature change monitor) Test HFM-SFI, Engines Vol.2, section 1

1) Observe Preparation for Test, see 22 .