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Contents Section: Testing & Diagnostics All sections

Dynamic Stability Assist (Dsa) & Engine Control Module (ECM) Diagnostic Trouble Codes: Wiring Volvo V40 I рестайлинг

Testing & Diagnostics 8 illustrations ~5335 words

Checking wiring and terminals

Check that the DSA switch button does not catch or stick in the depressed position. Remedy as necessary.

Check the cable between switch connector terminal 4 and DSA control module terminal 6 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Scheme 42

Scheme 42: Checking wiring and terminals
Scheme 42: Checking wiring and terminals
  1. Continue Refer to «Information»(ref-441334-S39878267792011121500000)

Check that the DSA switch button does not catch or stick in the depressed position. Remedy as necessary.

Check the cable between climate control module terminal #A11 DSA control module terminal #6. Check for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

  1. Continue Refer to «Information»(ref-441334-S42045041722011121500000)

Note. A diagnostic trouble code (DTC) may be stored if a DSA control module for model year 2003- is installed in a -2002 model year car. Check that the correct version of the control module is installed.

Check combined instrument panel connector B and the control module connector. Check for contact resistance and oxidation. See Contact resistance and oxidation .

Check the cable between combined instrument connector B terminal 22 and control module terminal #16. Check for an open-circuit. See Open-circuit, intermittent faults . Check for an intermittent short-circuit to ground. See Short-circuit to ground, intermittent faults . Check for an intermittent short-circuit to supply voltage. See Short-circuit to supply voltage, intermittent faults .

Scheme 43

Scheme 43
Scheme 43
  1. Continue Refer to «Information»(ref-441334-S39011462842011121500000)

Check combined instrument panel connector B and the control module connector. Check for contact resistance and oxidation. See Contact resistance and oxidation .

Check the cable between combined instrument connector B terminal 22 and control module terminal #16. Check for an open-circuit. See Open-circuit, intermittent faults . Check for an intermittent short-circuit to ground. See Short-circuit to ground, intermittent faults . Check for an intermittent short-circuit to supply voltage. See Short-circuit to supply voltage, intermittent faults .

Scheme 44

Scheme 44
Scheme 44
  1. Continue Refer to «Information»(ref-441334-S20793322542011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

FENIX 5.1

  1. Check the cable between the DSA control module terminal 15 and engine control module (ECM) terminal 42 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) .

EMS 2000

  1. Check the cable between the DSA control module terminal 15 and engine control module (ECM) terminal 20 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) .

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000) .
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000) .
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S14986461472011121500000)

Check the DSA control module connector. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between DSA control module terminal #7 and one of the stop lamps. Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check the stop lamp ground terminal. Check for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check the wiring between DSA control module #7 and the ABS control module, the automatic transmission control module (TCM) and the cruise control module. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

  1. Continue Refer to «Information»(ref-441334-S19224874132011121500000)

Check the DSA control module connector for contact resistance and oxidation according to Contact resistance and oxidation .

Check the central electrical module (CEM) connector for contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between DSA control module terminal 7 and one of the stop (brake) lamps for an intermittent open-circuit according to Open-circuit, intermittent faults .

  1. Continue Refer to «Information»(ref-441334-S01310025062011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation. See Contact resistance and oxidation .

FENIX 5.1

  1. Check the cable between DSA control module terminal #13 and engine control module (ECM) terminal #37. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000)
  2. On vehicles with automatic transmission: Also check the cable between engine control module (ECM) terminal #37 and automatic transmission control module (TCM) terminal #23. Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000)
  3. Check the cable between DSA control module terminal #9 and engine control module (ECM) terminal #31. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000)
  4. Check the cable between DSA control module terminal #1 and the fuse. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

EMS 2000

  1. Check the cable between DSA control module terminal #13 and engine control module (ECM) terminal #71. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000)
  2. Check the cable between DSA control module terminal #9 and ground terminal 31/25. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000)
  3. Check the cable between DSA control module terminal #1 and the fuse. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000)
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000)
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S24977902462011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

FENIX 5.1

  1. Check the cable between DSA control module terminal #13 and engine control module (ECM) terminal #37. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.
  2. Cars with automatic transmissions: Check the cable between engine control module (ECM) terminal #37 and automatic transmission control module (TCM) terminal #23. Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.

EMS 2000

  1. Check the cable between DSA control module terminal #13 and engine control module (ECM) terminal #71. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000)
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000)
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S39245087362011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between DSA control module terminal #1 and the fuse. Check for an intermittent open-circuit according to Open-circuit, intermittent faults .

FENIX 5.1

  1. Check the cable between DSA control module terminal #9 and engine control module (ECM) terminal #31. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

EMS 2000

  1. Check the cable between DSA control module terminal #9 and ground terminal 31/25. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000)
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000)
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S01102638362011121500000)

Check the engine control module (ECM) connector for contact resistance and oxidation according to Contact resistance and oxidation .

FENIX 5.1

  1. Check the voltage supply to engine control module (ECM) terminals #24 and #32. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000)
  2. Check engine control module (ECM) ground terminals #2 and #3. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

EMS 2000

  1. Check the voltage supply to engine control module (ECM) terminals #29 and #30. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000)
  2. Check the engine control module (ECM) ground terminals #3, #28, #33 and #67. Check for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) .

Other information

  1. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000)
  2. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation .

FENIX 5.1

  1. Check the cable between the DSA control module terminal 5 and engine control module (ECM) terminal 41 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) .
  2. On vehicles with automatic transmission: Also check the cable between engine control module (ECM) terminal 41 and automatic transmission control module (TCM) terminal 38 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) and for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) .

EMS 2000

  1. Check the cable between the DSA control module terminal 5 and engine control module (ECM) terminal 36 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) .

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000) .
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000) .
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S03494510312011121500000)

Check the DSA control module and engine control module (ECM) connectors for contact resistance and oxidation according to Contact resistance and oxidation

FENIX 5.1

  1. Check the cable between the DSA control module terminal 5 and engine control module (ECM) terminal 41 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.
  2. Applies to cars with automatic transmission: Check the cable between engine control module (ECM) terminal 41 and automatic transmission control module (TCM) terminal 38 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) and for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.

EMS 2000

  1. Check the cable between the DSA control module terminal 5 and engine control module (ECM) terminal 36 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Check for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000) . Check for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) . Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000) .
  2. To connect the breakout box for FENIX 5.1, see «Connecting the breakout box. FENIX 5.1»(ref-461610-S04346069642012040200000) .
  3. To connect the breakout box for EMS 2000, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S25177767292011121500000)

Check DSA control module and ABS control module connectors for contact resistance and oxidation according to. Contact resistance and oxidation .

Check the cable between the DSA control module

  1. terminal 2 and ABS control module terminal 25 (diagnostic trouble code (DTC) DSA-311)
  2. terminal 3 and ABS control module terminal 26 (diagnostic trouble code (DTC) DSA-312)
  3. terminal 4 and ABS control module terminal 23 (diagnostic trouble code (DTC) DSA-313)
  4. terminal 12 and ABS control module terminal 24 (diagnostic trouble code (DTC) DSA-314)

for intermittent open-circuit according to Open-circuit, intermittent faults , an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults and an intermittent short-circuit to supply according to Short-circuit to supply voltage, intermittent faults .

Check that the cable is not too close to sources of interference such as electric motors, ignition cables, carphone cables etc.

Other information

  1. To connect the breakout box for DSA, see «Connecting the breakout box. DSA»(ref-441291-S01847758132011121500000) .
  2. To connect the breakout box for ABS, see «Connecting the breakout box. ABS»(ref-441334-S27833644282011121500000) .
  1. Continue Refer to «Information»(ref-441334-S11045155942011121500000)

Checking components and wiring

Check the signal cable between the engine control module (ECM) terminal and injector terminal 2 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

Check the power cable between injector terminal 1 and system relay (2/14) terminal 3 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

Try a new injector if no faults are found in the above fault-tracing.

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
  2. To replace the injector, see «Replacing the injector(s)»(ref-441337-S11100081512011121500000) .

Scheme 45

Scheme 45
Scheme 45

Scheme 46

Scheme 46
Scheme 46
  1. Continue Refer to «Information»(ref-441334-S07722705982011121500000)

The cause of the diagnostic trouble code (DTC) was loose connections in the injector and / or engine control module (ECM) connectors. Check the connectors for loose terminals and contact resistance and oxidation according to Contact resistance and oxidation .

Check the cable between injector connector terminal 2 (control module side) and engine control module (ECM) terminal 59 (EFI-115), terminal 90 (EFI-125), terminal 60 (EFI-135) or terminal 89 (EFI-145) depending on the diagnostic trouble code (DTC) stored, for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

  1. Continue Refer to «Selecting diagnostic trouble code (DTC)»(ref-441334-S06004952762011121500000)

Check the cable between injector terminal 1 and system relay 2/14 terminal 3 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Scheme 47

Scheme 47
Scheme 47
  1. Continue Refer to «Selecting diagnostic trouble code (DTC)»(ref-441334-S06004952762011121500000)

Checking wiring and connectors

  1. Ignition off Check the connector for the affected injector. Check for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the resistance of the affected injector between terminals #1 and #2. The resistance must be approximately 12 ohms. Check the signal cable between the affected injector terminal #2 and engine control module (ECM) terminal #59 (ECM-1E), terminal #90 (ECM-1F), terminal #60 (ECM-20) or terminal #89 (ECM-21). Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Check the power supply cable between system relay terminal #5 (87) and affected injector terminal #1. Check for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . HINT: The voltage must be approximately 12 V between injector terminals #1 and #2 (control module side) for approximately 2 seconds after the ignition is switched on. Remedy as necessary. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) To access or replace the injector, see «Replacing the injector(s)»(ref-441337-S11100081512011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Selecting diagnostic trouble code (DTC)»(ref-441334-S13379849382011121500000)

Check that the resistance in the canister purge (CP) valve between terminals 1 and 2 is approximately 30 ohms at +20 °C.

Check and rectify the signal line between Engine control module (ECM) connection #4 and the EVAP-valve's connection #1 for short-circuiting to voltage.

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  2. See «Checking wiring and terminals. Intermittent faults»(ref-441291-S36551477422011121500000)
  1. Continue Refer to «Information»(ref-441334-S38658297962011121500000)

Checking wiring

Check the signal cable between engine control module (ECM) terminal #4 and canister purge (CP) valve terminal #1. Check for an intermittent short-circuit to ground and remedy according to Short-circuit to ground, intermittent faults .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S23390480442011121500000)

Check the engine control module (ECM) and atmospheric pressure sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage, or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal 18 and atmospheric pressure sensor terminal 3 for an intermittent short-circuit to supply voltage. Remedy according to Short-circuit to supply voltage, intermittent faults .

Check the voltage cable between engine control module (ECM) connector terminal 77 and atmospheric pressure sensor terminal 2 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
  2. To replace the atmospheric pressure sensor, see «Replacing the air conditioning (A/C) system pressure sensor»(ref-441335-S34565070732011121500000) .

Scheme 48

Scheme 48
Scheme 48
  1. Continue Refer to «Information»(ref-441334-S24658549562011121500000)

Check the engine control module (ECM) and atmospheric pressure sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage, or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal 18 and atmospheric pressure sensor terminal 3 for an intermittent short-circuit to ground. Remedy according to Short-circuit to ground, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check the voltage cable between engine control module (ECM) connector terminal 78 and atmospheric pressure sensor terminal 1 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

The supply voltage should be 5 V.

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
  2. To replace the atmospheric pressure sensor, see «Replacing the air conditioning (A/C) system pressure sensor»(ref-441335-S34565070732011121500000) .
  1. Continue Refer to «Information»(ref-441334-S18829314522011121500000)
  1. Ignition off
  2. Check the atmospheric pressure sensor and engine control module (ECM) connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000)
  3. Check the signal cable between atmospheric pressure sensor terminal 3 and control module terminal 18. Check the power supply cable between atmospheric pressure sensor terminal 1 and control module terminal 74. Check these cables for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Check the atmospheric pressure sensor signal cable terminal 3 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000)
  4. Remedy as necessary
  5. Try a atmospheric pressure sensor if no fault is found during the above fault-tracing. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Verification»(ref-441334-S10676804922011121500000)

Check the wiring and connectors

  1. Ignition off Check the connector of boost pressure sensor 2 (MAP) for intermittent contact resistance and oxidation as described in «Contact resistance and oxidation»(ref-441291-S00267239222011121500000) and for loose connections as described in «Loose connections (terminals)»(ref-441291-S22081329982011121500000) . Check especially for damage. Check the cable between boost pressure sensor 2 (MAP) terminal #3 and control module terminal #13 for intermittent short circuit to supply voltage as described in «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000) and the cable between boost pressure sensor 2 (MAP) terminal #2 and ground for intermittent open circuit as described in «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000) . Remedy as necessary. Other information: To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) . For information on signals, see «Signal specification»(ref-441338-S16642011902011121500000) . For boost pressure sensor 2 (MAP) replacement, see «Boost pressure sensor 2, replacing»(ref-441339-S34452999362011121500000) .
  1. Continue Refer to «Information»(ref-441334-S07471353512011121500000)

Checking the wiring

  1. Ignition off. Check the boost pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Check the signal cable between boost pressure sensor terminal 3 and control module terminal 13 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000) and the ground lead between boost pressure sensor terminal 2 and control module terminal 73 for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Checking the boost pressure sensor signal»(ref-441334-S22070387062011121500000)
  1. Ignition off. Check the boost pressure sensor and engine control module (ECM) connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Remedy as necessary.
  1. Continue Refer to «Checking the boost pressure sensor signal»(ref-441334-S14767984282011121500000)
  1. Ignition off. Check the signal cable between boost pressure sensor connector terminal 3 and control module terminal 13. Check the power supply cable between boost pressure sensor terminal 1 and control module terminal 74. Check these cables for an open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000) . Check the boost pressure sensor signal cable terminal 3 to control module terminal 13 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000) . Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Checking the boost pressure sensor signal»(ref-441334-S33360777502011121500000)
  1. Ignition off Check the connectors of boost pressure sensor 2 (MAP) and the engine control module for contact resistance and oxidation as described in «Contact resistance and oxidation»(ref-441291-S41448420802011121500000) . Remedy as necessary.
  1. Continue Refer to «Checking boost pressure sensor signals»(ref-441334-S07058465412011121500000)

Check the engine control module (ECM) and intake air temperature (IAT) sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage, or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal 48 and intake air temperature (IAT) sensor terminal 1 for an intermittent short-circuit to supply voltage. Remedy according to Short-circuit to supply voltage, intermittent faults and for an intermittent open-circuit Open-circuit, intermittent faults .

Check the ground lead between engine control module (ECM) terminal 79 and intake air temperature (IAT) sensor terminal 2 for an intermittent open-circuit. Remedy according to Open-circuit, intermittent faults .

Other information

  1. To replace the intake air temperature (IAT) sensor, see «Replacing the intake air temperature sensor»(ref-441335-S20021700922011121500000)
  2. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S08744864102011121500000)

Check the cable between intake air temperature (IAT) sensor connector terminal #1 (engine control module (ECM) side) and engine control module (ECM) terminal #48. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S05660983492011121500000)

Check the cable between intake air temperature (IAT) sensor connector terminal #1 (engine control module (ECM) side) and engine control module (ECM) terminal #48. Check for an open-circuit according to Open-circuit, permanent faults .

Check the cable between intake air temperature (IAT) sensor connector terminal #2 (engine control module (ECM) side) and engine control module (ECM) terminal #79. Check for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S05660983492011121500000)

Check the signal cable between the engine control module (ECM) terminal 48 and the intake air temperature (IAT) sensor terminal 1 for an intermittent short-circuit to ground and remedy according to Short-circuit to ground, intermittent faults .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
  2. To replace the mass air flow (MAF) sensor, see «Replacing the intake air temperature sensor»(ref-441335-S20021700922011121500000) .
  1. Continue Refer to «Information»(ref-441334-S42602722612011121500000)
  1. Ignition off
  2. Check the intake air temperature (IAT) sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-441291-S22081329982011121500000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S00267239222011121500000)
  3. Check the signal cable between engine control module (ECM) terminal 48 and intake air temperature (IAT) sensor terminal 1 for a short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-441291-S16169375282011121500000)
  4. Check the ground lead between intake air temperature (IAT) sensor terminal 2 and engine control module (ECM) terminal 79 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-441291-S39448265522011121500000)
  5. Check the signal cable between intake air temperature (IAT) sensor terminal 1 and engine control module (ECM) terminal 48. Check the cable between intake air temperature (IAT) sensor terminal 2 and engine control module (ECM) terminal 79. Check these cables for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-441291-S39506668312011121500000)
  6. Remedy as necessary
  7. Try a new intake air temperature (IAT) sensor if no fault is found during the above fault-tracing. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals, see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Information»(ref-441334-S19819236792011121500000)
  1. Ignition off
  2. Check the intake air temperature (IAT) sensor and engine control module (ECM) connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-441291-S41448420802011121500000)
  3. Check the signal cable between engine control module (ECM) terminal # 48 and intake air temperature (IAT) sensor terminal #1. Check for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-441291-S27984344722011121500000)
  4. Check the ground lead between intake air temperature (IAT) sensor terminal # 2 and engine control module (ECM) terminal # 79. Check for an intermittent open-circuit according to «Open-circuit, permanent faults»(ref-441291-S38831997352011121500000)
  5. Check the signal cable between intake air temperature (IAT) sensor terminal #1 and engine control module (ECM) terminal #48. Check the ground lead between intake air temperature (IAT) sensor terminal #2 and engine control module (ECM) terminal # 79. Check these cables for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-441291-S37119086802011121500000)
  6. Remedy as necessary
  7. Try a new intake air temperature (IAT) sensor if no fault is found during the above fault-tracing. Other information To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) For information about signals see «Signal specification»(ref-441338-S16642011902011121500000) .
  1. Continue Refer to «Information»(ref-441334-S29293565772011121500000)

Check the engine control module (ECM) and mass air flow (MAF) sensor connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal #16 and mass air flow (MAF) sensor terminal #2. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Remedy if necessary.

Check the ground lead between engine control module (ECM) terminal #15 and mass air flow (MAF) sensor terminal #1. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Remedy if necessary.

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S38736047952011121500000)

Check the cable between mass air flow (MAF) sensor connector terminal #1 (engine control module (ECM) side) and engine control module (ECM) terminal #15. Check for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S20993812952011121500000)

Check the cable between mass air flow (MAF) sensor connector terminal #2 (engine control module (ECM) side) and engine control module (ECM) terminal #15. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S20993812952011121500000)

Check the engine control module (ECM) and mass air flow (MAF) sensor connectors. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal #16 and mass air flow (MAF) sensor terminal #2. Check for an intermittent short-circuit to ground. according to Short-circuit to ground, intermittent faults . Remedy if necessary.

Check the power supply cable between mass air flow (MAF) sensor terminal #3 and system relay (2/14) terminal #3. Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Remedy if necessary.

The supply voltage should be approximately battery voltage when the system relay is activated.

Check that the idling system air ducts are not blocked.

HINT: If there is a mechanical defect in the idle air control (IAC) valve the air flow may be hindered by blockages in the idling system air ducts.

Check the intake system for air leakage according to intake system/leak test .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000)
  2. To replace the mass air flow (MAF) sensor, see «Replacing the mass air flow (MAF) sensor»(ref-441341-S07422979692011121500000)
  3. To replace the idle air control (IAC) valve, see «Replacing the idle air control (IAC) valve»(ref-441341-S41689657072011121500000) .
  1. Continue Refer to «Information»(ref-441334-S16341012422011121500000)

Check the cable between mass air flow (MAF) sensor connector terminal #3 (engine control module (ECM) side) and system relay 2/14 base terminal #5 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S05120824552011121500000)

Check the engine control module (ECM) and engine coolant temperature (ECT) sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check in particular for damage or loose terminal pins.

Check the signal cable between engine control module (ECM) terminal #47 and engine temperature (ECT) sensor terminal #1. Check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults . Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Remedy if necessary.

Check the ground lead between engine control module (ECM) terminal #73 and engine coolant temperature (ECT) sensor terminal #2. Check for an intermittent open-circuit according to Open-circuit, intermittent faults . Remedy if necessary.

If no faults are found in the above fault-tracing, try a new engine coolant temperature (ECT) sensor. See Replacing the engine coolant temperature (ECT) sensor .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .

Scheme 49

Scheme 49
Scheme 49
  1. Continue Refer to «Information»(ref-441334-S02807318662011121500000)

Check the cable between engine coolant temperature (ECT) sensor connector terminal #1 (engine control module (ECM) side) and engine control module (ECM) terminal #47. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S28960103502011121500000)

Check the cable between engine coolant temperature (ECT) sensor connector terminal #1 (engine control module (ECM) side) and engine control module (ECM) terminal #47. Check for an open-circuit according to Open-circuit, permanent faults .

Check the cable between engine coolant temperature (ECT) sensor connector terminal #2 (engine control module (ECM) side) and engine control module (ECM) terminal #73. Check for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

  1. Continue Refer to «Verification»(ref-441334-S28960103502011121500000)

Check the signal cable between engine control module (ECM) terminal #47 and engine coolant temperature (ECT) sensor terminal #1. Check for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults . Remedy if necessary.

Try a new engine coolant temperature (ECT) sensor according to Replacing the engine coolant temperature (ECT) sensor .

Other information

  1. To connect the breakout box, see «Connecting the breakout box. EMS 2000»(ref-441291-S13587040122011121500000) .
  1. Continue Refer to «Information»(ref-441334-S26591992842011121500000)

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