Diagnostic Manual, Climate Control, Volume 1
Diagnosis - Diagnostic Trouble Code (DTC) Memory
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Preparations for DTC Readout
1. Connect HHT, see section 0 and readout DTC's.
2. Review  11, 12, 13 , 14, 15, 20, 21 , 22, 31,
32 , 41, 42
3. Ignition: ON
4. Temperature selector left     right   .
5. Within 20 seconds press  and  simultaneously for more than 5 seconds.
6. The LED in  flashes and the display shows    .
7. Press  repeatedly until all DTC's (refer to DTC table) are displayed. Record each DTC as it is displayed.
8. Each malfunction (short circuit, open circuit, etc.) has a specific DTC asigned to it.
The letter  (   ) is displayed in the left of the display and the DTC is displayed in the right of the display. By pressing the right button the next DTC stored in memory will be displayed.
9. To erase: Only possible after all DTC's are read out.
Simultaneously press both > 2 secs"d" will be displayed in the left side of the display window and  on the right side.
To cancel erase: By pressing the current faults will appear again.
10. Set temperature selector to normal setting.
11. Turn ignition OFF to end test.
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Diagnostic trouble code (DTC)
N22  |
Possible cause |
Test step/Remedy 1) |
| - - |
No malfunction in system |
- |
     |
In-car temperature sensor (B10/4) |
23  4.0 |
  |
Outside temperature indicator temperature sensor (B14) |
23 21.0 |
  |
Heater core temperature (B10/1) |
23 7.0 |
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Heater core temperature (B10/1) |
23 8.0 |
| |
Evaporator temperature sensor (B10/6) |
23 5.0 |
| |
ECT sensor (B11/4 ) |
23 21.0 |
| |
Refrigerant pressure sensor (B12) |
23 9.0 |
| |
Refrigerant temperature sensor (B12/1) |
23 6.0 |
| |
Sun sensor (B32) |
23 10.0 |
| |
Emissions sensor (B31) |
23 12.0 |
| |
Refrigerant fill |
23 9.0 , 6.0 |
| |
Coolant circulation pump (M13) |
23 15.0 |
| |
Duovalve (Y21y1), left |
23 16.0 |
| |
Duovalve (Y21y2), right |
23 16.0 |
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Electromagnetic clutch (A9k1) |
23 19.0 |
| |
Idle speed increase |
- |
| |
Pulse module (N65) |
23 13.0 |
| |
Series interface (K1) connection to instrument cluster (A1) |
23 21.0 |
| |
Switchover valve block (Y11) |
23 18.0 |
| |
Activated charcoal filter actuator (A32m2) open |
23 20.0 |
| |
Activated charcoal filter actuator (A32m2) closed |
23 20.0 |
| |
Non-USA DTC |
- |
| |
Series interface (K2) connection to instrument cluster (A1) |
23 23.0 |
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Wide open throttle (WOT) position signal: diesel engines |
- |
| 1) Observe Preparation for Test, see 22 . |
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Printable version
