Troubleshooting procedure
Troubleshooting can only be performed when the fault is present. In other words, specific troubleshooting can only be performed in accordance with instructions (given under Diagnosis/troubleshooting for each fault code) if the entry has the status 'present' in the fault memory.
If the fault is currently 'not present', please check the following
- Diagnosis conditions are met; if necessary perform a short test or test drive
- All plug connections and ground points of the affected current path are OK.
- Set all wiring harnesses of the affected current path to a state that corresponds to driving by pulling and shaking them (loose contact).
Diagnostic conditions
Note. Important! Always connect a suitable battery charging device to the vehicle electrical system battery or to the designated jump-start terminal before starting diagnosis. All unnecessary loads must also be switched off.
Note. The fault can only be identified if the requirements listed under 'Diagnostic conditions' are met. For this reason, the specified procedure must be observed after a fault is repaired: Erase fault memory. Satisfy the requirements listed under 'Diagnostic conditions'. Read out fault memory again.
Diagnosis/troubleshooting
Note. The fault memory Info key [F8] on the 9588 Porsche System Tester II can be used to access the 'extended fault memory'. The following information can be displayed
- Ignition on for at least 6 minutes
- Internal control unit (level control) function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Ignition on for at least 6 minutes | No warning in instrument cluster Go to Erase fault memory --> End | Red warning in instrument cluster Go to Step 2 |
| 2 | Replace control unit (level control) | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply for front left wheel acceleration sensor | Switch off ignition. Pull off plug on front left wheel acceleration sensor. Switch on ignition. Measure voltage between plug B of front left wheel acceleration sensor 'pins 1 and 3'. | ~ 5 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front left wheel acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug B off front left wheel acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 86, 98, 110' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front left wheel acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 86, 98, 110' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front left wheel acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B 'pins 86, 98, 110' and front left wheel acceleration sensor plug B 'pins 2, 3, 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between front left wheel acceleration sensor and level control module for short circuit with respect to each other | Measure resistance in the individual level control module wires on plug B between 'pins 86 and 98', 'pins 86 and 110', and 'pins 98 and 110'. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace front left wheel acceleration sensor | > End | Go to Step 7 | |
| 7 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply for front right wheel acceleration sensor | Switch off ignition. Pull off plug on front right wheel acceleration sensor. Switch on ignition. Measure voltage between plug B of front right wheel acceleration sensor 'pins 1 and 3'. | ~ 5 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front right wheel acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug B off front right wheel acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 87, 99, 107' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front right wheel acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 87, 99, 107' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front right wheel acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B 'pins 87, 99, 107' and front right wheel acceleration sensor plug B 'pins 2, 3, 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between front right wheel acceleration sensor and level control module for short circuit with respect to each other | Measure resistance in the level control module wires on plug B between 'pins 87 and 99', 'pins 87 and 107', and 'pins 99 and 107'. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace front right wheel acceleration sensor | > End | Go to Step 7 | |
| 7 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply for front left body acceleration sensor | Switch off ignition. Pull off plug on front left body acceleration sensor. Switch on ignition. Measure voltage between plug of front left body acceleration sensor 'pins 1 and 3'. | ~ 5 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front left body acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull off plug on front left body acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 94, 102, 111' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front left body acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 94, 102, 111' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front left body acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B 'pins 94, 102, 111' and front left body acceleration sensor 'pins 2, 3, 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between front left body acceleration sensor and level control module for short circuit with respect to each other | Measure resistance in the individual level control module wires on plug B between 'pins 94 and 102', 'pins 94 and 111', and 'pins 102 and 111'. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace front left body acceleration sensor | > End | Go to Step 7 | |
| 7 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply for front right body acceleration sensor | Switch off ignition. Pull off plug on front right body acceleration sensor. Switch on ignition. Measure voltage between plug of front right body acceleration sensor 'pins 1 and 3'. | ~ 5 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front right body acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull off plug on front right body acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 95, 103, 106' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front right body acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 95, 103, 106' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front right body acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B 'pins 95, 103, 106' and front right body acceleration sensor 'pins 2, 3, 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between front right body acceleration sensor and level control module for short circuit with respect to each other | Measure resistance in the individual level control module wires on plug B between 'pins 95 and 103', 'pins 95 and 106', and 'pins 103 and 106'. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace front right body acceleration sensor. | > End | Go to Step 7 | |
| 7 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply for rear body acceleration sensor | Switch off ignition. Pull off plug on rear body acceleration sensor. Switch on ignition. Measure voltage between plug on rear body acceleration sensor 'pins 1 and 3'. | ~ 5 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between rear body acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull off plug on rear body acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 96, 104, 109' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between rear body acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 96, 104, 109' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between rear body acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B 'pins 96, 104, 109' and rear body acceleration sensor 'pins 2, 3, 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between rear body acceleration sensor and level control module for short circuit with respect to each other | Measure resistance in the individual level control module wires on plug B between 'pins 96 and 104', 'pins 96 and 109', and 'pins 104 and 109'. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace rear body acceleration sensor. | > End | Go to Step 7 | |
| 7 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between front left damping adjustment valve and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug A off front left damping adjustment valve. Switch on ignition. Measure voltage between level control module plug B 'pins 115, 117' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front left damping adjustment valve and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 115, 117' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front left damping adjustment valve and level control module for open circuit | Measure resistance between level control module plug B 'pins 115, 117' and front left damping adjustment valve 'pins 1, 2'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front left damping adjustment valve and level control module for short circuit with respect to each other | Measure resistance of the individual level control module wires on plug B between 'pins 115 and 117'. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace level control module. | > End | Go to Step 6 | |
| 6 | Replace front left damper strut. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between front right damping adjustment valve and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug A off front right damping adjustment valve. Switch on ignition. Measure voltage between level control module plug B 'pins 116, 118' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front right damping adjustment valve and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 116, 118' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front right damping adjustment valve and level control module for open circuit | Measure resistance between level control module plug B 'pins 116, 118' and front right damping adjustment valve 'pins 1, 2'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front right damping adjustment valve and level control module for short circuit with respect to each other | Measure resistance of the individual level control module wires on plug B between 'pin 116' and 'pin 118'. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace level control module. | > End | Go to Step 6 | |
| 6 | Replace front right damper strut. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between rear left damping adjustment valve and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug off rear left damping adjustment valve. Switch on ignition. Measure voltage between level control module plug B 'pins 114, 119' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between rear left damping adjustment valve and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 114, 119' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between rear left damping adjustment valve and level control module for open circuit | Measure resistance between level control module plug B 'pins 114, 119' and rear left damping adjustment valve 'pins 2, 1'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between rear left damping adjustment valve and level control module for short circuit with respect to each other | Measure resistance of the individual level control module wires on plug B between 'pins 114 and 119'. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace level control module. | > End | Go to Step 6 | |
| 6 | Replace rear left damper strut. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between rear right damping adjustment valve and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull plug off rear right damping adjustment valve. Switch on ignition. Measure voltage between level control module plug B 'pins 120, 121' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between rear right damping adjustment valve and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 120, 121' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between rear right damping adjustment valve and level control module for open circuit | Measure resistance between level control module plug B 'pins 120, 121' and rear right damping adjustment valve 'pins 2, 1'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between rear right damping adjustment valve and level control module for short circuit with respect to each other | Measure resistance of the individual level control module wires on plug B between 'pins 120 and 121'. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace level control module. | > End | Go to Step 6 | |
| 6 | Replace rear right damper strut. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply to sensors | Measurement 1a Switch off ignition. Pull off plug on front right body acceleration sensor. Switch on ignition. Measure voltage between front right body acceleration sensor 'pins 1 and 3' and 'pin 1 and ground'. Measurement 1b Switch off ignition. Pull plug B off front right wheel acceleration sensor. Switch on ignition. Measure voltage between front right wheel acceleration sensor plug B 'pins 1 and 3' and plug B 'pin 1 and ground'. Measurement 1c Switch off ignition. Pull off plug on rear left body acceleration sensor. Switch on ignition. Measure voltage between rear left body acceleration sensor plug 'pins 1 and 3' and 'pin 1 and ground'. | ~ 5 V Go to Step 5 | Step 2 |
| 2 | Check wiring between front right body acceleration sensor, front right wheel acceleration sensor, rear left body acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull off plug on front right body acceleration sensor. Pull off plug on rear left body acceleration sensor. Pull off plug B on front right wheel acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 87, 95, 96, 106, 107, 109' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front right body acceleration sensor, front right wheel acceleration sensor, rear left body acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 87, 95, 96, 106, 107, 109' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front right body acceleration sensor, front right wheel acceleration sensor, rear left body acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B: 'pin 99' and plug B of front right wheel acceleration sensor 'pin 3'. 'pin 103' and plug of front right body acceleration sensor 'pin 3'. 'pin 104' and plug of front right body acceleration sensor 'pin 3'. 'pin 106' and plug of front right body acceleration sensor 'pin 1'. 'pin 107' and plug B of front right wheel acceleration sensor 'pin 1'. 'pin 109' and plug of rear left body acceleration sensor 'pin 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace front right and/or rear left body acceleration sensor and/or front right wheel acceleration sensor. | > End | Go to Step 6 | |
| 6 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check power supply to sensors | Measurement 1a Switch off ignition. Pull off plug on front left body acceleration sensor. Switch on ignition. Measure voltage between front left body acceleration sensor plug 'pins 1 and 3' and 'pin 1 and ground'. Measurement 1b Switch off ignition. Pull plug B off front left wheel acceleration sensor. Switch on ignition. Measure voltage between front left wheel acceleration sensor plug B 'pins 1 and 3' and plug B 'pin 1 and ground'. | ~ 5 V Go to Step 5 | Go to Step 2 |
| 2 | Check wiring between front right body acceleration sensor, front right wheel acceleration sensor and level control module for short circuit to B+ | Switch off ignition. Pull plug B off level control module. Pull off plug on front left body acceleration sensor. Pull off plug on front left wheel acceleration sensor. Switch on ignition. Measure voltage between level control module plug B 'pins 86, 94, 98, 102, 110, 111' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front left body acceleration sensor, front left wheel acceleration sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug B 'pins 86, 94, 98, 102, 110, 111' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between front left body acceleration sensor, front left wheel acceleration sensor and level control module for open circuit | Measure resistance between level control module plug B: 'pin 102' and body acceleration sensor plug 'pin 3'. 'pin 111' and body acceleration sensor plug 'pin 1'. 'pin 99' and plug B of wheel acceleration sensor 'pin 3'. 'pin 110' and plug B of wheel acceleration sensor 'pin 1'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Replace front left body acceleration sensor and/or front left wheel acceleration sensor. | > End | Go to Step 6 | |
| 6 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace level control module | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between tire filling connection and level control module for short circuit to ground | Switch off ignition. Pull plugs A and B off level control module. Pull plug off tire filling connection. Measure resistance between level control module plug A 'pins 54, 55' and plug B 'pin 100' and ground. | Infinity ohms Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between tire filling connection and level control module for open circuit | Measure resistance between level control module plug A 'pins 54, 55' and tire filling connection plug 'pins 1, 3' and plug B 'pin 100' and tire filling connection plug 'pin 2'. | < 5 ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check tire filling connection | Measurement 3a Measure resistance between tire filling connection plug 'pins 1 and 2'. Measurement 3b Connect tire filling hose 'included in tool kit' to tire filling connection. Measure resistance between tire filling connection plug 'pins 2 and 3'. | ~ 100 ohms Proceed to measurement 3b ~ 100 ohms Go to Step 4 | Replace tire filling connection. --> End Replace tire filling connection. --> End |
| 4 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test on level adjustment control unit
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Delete fault code 0532 in the level adjustment control unit | > End | Go to Step 2 |
| 2 | Replace level adjustment control unit. | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check fuse for level control module | Check fuse 'F27' in fuse carrier at right of dashboard. | Fuse OK Go to Step 2 | Replace fuse. --> End If fuse is once again faulty: Go to Step 4 |
| 2 | Check power supply to level control module | Switch off ignition. Pull plug A off level control module. Measure voltage between level control module plug A 'pins 4, 5' and ground. | 11.4 - 14.5 V Go to Step 3 | Go to Step 4 |
| 3 | Check ground supply to level control module | Measure voltage between level control module plug A 'pins 1, 2' and battery positive connection. | 11.4 - 14.5 V Go to Step 6 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between fuse 'F27' and level control module for short circuit to ground | Switch off ignition. Remove fuse 'F27' from fuse carrier at right of dashboard insert. Pull plug A off level control module. Measure resistance between level control module plug A 'pins 4, 5' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between fuse 'F27' and level control module for open circuit | Measure resistance between level control module plug A 'pins 4, 5' and output of fuse 'F27' in fuse carrier at right of dashboard. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between rear left vehicle level sensor and level control module for short circuit to B+ | Switch off ignition. Pull plugs A and B off level control module. Pull plug off rear left vehicle level control sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 64, 75' and ground and plug B 'pin 90' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between rear left vehicle level sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 64, 75' and ground and plug B 'pin 90' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between rear left vehicle level sensor and level control module for open circuit | Measure resistance between level control module plug A 'pins 64, 75' and rear left vehicle level control sensor plug 'pins 5, 1 'and plug B 'pin 90' and rear left level control sensor plug 'pin 6'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 5 | |
| 5 | Replace rear left vehicle level sensor See Note | > End | Go to Step 6 | |
| 6 | Replace level control module See Note | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between rear right vehicle level sensor and level control module for short circuit to B+ | Switch off ignition. Pull plugs A and B off level control module. Pull plug off rear right vehicle level control sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 66, 74' and ground and plug B 'pin 91' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between rear right vehicle level sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 66, 74' and ground and plug B 'pin 91' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between rear right vehicle level sensor and level control module for open circuit | Measure resistance between level control module plug A 'pins 66, 74' and rear right vehicle level control sensor plug 'pins 5, 1 'and plug B 'pin 91' and rear right level control sensor plug 'pin 6'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 4 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 5 | |
| 5 | Replace rear right vehicle level sensor See Note | > End | Go to Step 6 | |
| 6 | Replace level control module See Note | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between front left vehicle level sensor and level control module for short circuit to B+ | Switch off ignition. Pull plugs A and B off level control module. Pull plug off front left vehicle level control sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 63, 77' and ground and plug B 'pin 82' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front left vehicle level sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 63, 77' and ground and plug B 'pin 82' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front left vehicle level sensor and level control module for open circuit | Measure resistance between level control module plug A 'pins 63, 77' and front left vehicle level control sensor plug 'pins 5, 1' and plug B 'pin 82' and front left level control sensor plug 'pin 6'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 4 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 5 | |
| 5 | Replace front left vehicle level sensor See Note | > End | Go to Step 6 | |
| 6 | Replace level control module See Note | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between solenoid block and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off solenoid block. Switch on ignition. Measure voltage between level control module plug A 'pin 18' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between solenoid block and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 18, 37' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between solenoid block and level control module for open circuit | Measure resistance between level control module plug A 'pins 18, 37' and solenoid block plug A 'pins 4, 5'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Pull plug off compressor relay. Measure resistance between level control module plug A 'pin 36' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pin 36' and compressor relay plug A 'pin 3D'. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace level control module. | > End | Go to Step 7 | |
| 7 | Replace solenoid block. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between solenoid block and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off solenoid block. Switch on ignition. Measure voltage between level control module plug A 'pin 19' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between solenoid block and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 19, 37' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between solenoid block and level control module for open circuit | Measure resistance between level control module plug A 'pins 19, 37' and solenoid block plug A 'pins 2, 5'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Pull plug off compressor relay. Measure resistance between level control module plug A 'pin 36' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pin 36' and compressor relay plug A 'pin 3D'. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace level control module. | > End | Go to Step 7 | |
| 7 | Replace solenoid block. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between solenoid block and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off solenoid block. Switch on ignition. Measure voltage between level control module plug A 'pin 20' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between solenoid block and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pin 20' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between solenoid block and level control module for open circuit | Measure resistance between level control module plug A 'pins 20, 37' and solenoid block plug A 'pins 1, 5'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Pull plug off compressor relay. Measure resistance between level control module plug A 'pin 36' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pin 36' and compressor relay plug A 'pin 3D'. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace level control module. | > End | Go to Step 7 | |
| 7 | Replace solenoid block. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between solenoid block and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off solenoid block. Switch on ignition. Measure voltage between level control module plug A 'pin 17' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between solenoid block and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 17, 37' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between solenoid block and level control module for open circuit | Measure resistance between level control module plug A 'pins 17, 37' and solenoid block plug A 'pins 3, 5'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Pull plug off compressor relay. Measure resistance between level control module plug A 'pin 36' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pin 36' and compressor relay plug A 'pin 3D'. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Replace level control module. | > End | Go to Step 7 | |
| 7 | Replace solenoid block. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Perform coding | Code level control module using 9588 Porsche System Tester II. Re-code control module. | > End | Go to Step 2 |
| 2 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out DME control module fault memory. | Go to Step 2 | Correct faults and read out fault memory in level control module again. If OK: --> End If not OK: --> Step 2 |
| 2 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | Go to Step 3 |
| 3 | Replace level control module. | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out PSM control module fault memory. | Go to Step 2 | Correct faults and read out fault memory in level control module again. If OK: --> End If not OK: --> Step 2 |
| 2 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | Go to Step 3 |
| 3 | Replace level control module. | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between level control system compressor and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off level control system compressor. Switch on ignition. Measure voltage between level control module plug A 'pins 33, 43' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between level control system compressor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 33, 37, 43' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between level control system compressor and level control module for open circuit | Measure resistance between level control module plug A 'pins 33, 43' and level control system compressor plug A 'pins 2, 1'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between solenoid block and level control module for open circuit | Pull plug A off solenoid block. Measure resistance between level control module plug A 'pin 37' and solenoid block plug A 'pin 5'. | < 5 ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Pull plug off compressor relay. Measure resistance between level control module plug A 'pin 36' and ground. | Infinity ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pin 36' and compressor relay plug A 'pin 3D'. | < 5 ohms Go to Step 7 | Repair or replace wiring harness. --> End |
| 7 | Check vent solenoid valve | Connect plugs on compressor and level control module. Switch on ignition. Select 'Vent solenoid valve' in the "Input signals" menu on the 9588 Porsche System Tester II. Close all vehicle doors. Lower vehicle by actuating the control module for level control. | Display 'off' --> End | Display 'on' - vent solenoid valve fails to switch: Go to Step 8 |
| 8 | Replace level control system compressor. | > End | Go to Step 9 | |
| 9 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Read out fault memory in vehicle electrical system control module | Go to Step 2 | Correct faults and read out fault memory in level control module again. If OK: --> End If not OK: --> Step 2 | |
| 2 | Read out fault memory for rear convenience system control module | Go to Step 3 | Correct faults and read out fault memory in level control module again. If OK: --> End If not OK: --> Step 3 | |
| 3 | Check wiring between vehicle electrical system control module and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug J off vehicle electrical system control module. Switch on ignition. Measure voltage between level control module plug A 'pin 53' and ground. | 0.3 V Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check wiring between vehicle electrical system control module and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pin 53' and ground. | Infinity ohms Go to Step 5 | Repair or replace wiring harness. --> End |
| 5 | Check wiring between vehicle electrical system control module and level control module for open circuit | Measure resistance between level control module plug A 'pin 53' and vehicle electrical system control module plug J 'pin 12'. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Continue troubleshooting in 'Vehicle electrical system control module', refer to FAULT CODE 0062 | Go to Step 7 | Correct faults. If OK: --> End | |
| 7 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Lower vehicle to low level or loaded level several times if necessary | > End | Go to Step 2 | |
| 2 | Check fuse | Check 1a Switch off ignition. Remove fuse 'F13' (40A) from fuse carrier in back-up fuse box and check for continuity. | Go to Step 5 | Go to Step 3 |
| Check 1b Re-insert intact fuse 'F13' (40A). Measure voltage at output of fuse 'F13' and ground. | 11.4 - 14.5 V Go to Step 4 | Go to Step 3 | ||
| 3 | Replace fuse | Fault is no longer present (fuse not faulty). --> End | Fault still present (fuse faulty again). Go to Step 4 | |
| 4 | Inspect the wiring harness from 'F13 fuse output' to compressor relay 'pin A3B (terminal 30)' for pinches and chafing damage. | No damage visible. Go to Step 5 | Repair or replace wiring harness. --> End | |
| 5 | Check wiring between compressor relay and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Remove compressor relay 'relay socket 3 in relay carrier at left of dashboard'. Switch on ignition. Measure voltage between level control module plug A 'pins 31, 36' and ground. | < 0.3 V Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Check wiring between compressor relay and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 31, 36' and ground. | Infinity ohms Go to Step 7 | Repair or replace wiring harness. --> End |
| 7 | Check wiring between compressor relay and level control module for open circuit | Measure resistance between level control module plug A 'pins 31, 36' and compressor relay plug A 'pin 3F (terminal 85), pin 3D (terminal 86)'. | < 5 ohms Go to Step 8 | Repair or replace wiring harness. --> End |
| 8 | Replace compressor relay | > End | Go to Step 9 | |
| 9 | Replace level control module | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Check mechanical and pneumatic components | Go to Step 3 | Repair/replace components in accordance with procedures in LEVEL CONTROL article . Go to Step 2 |
| 2 | Check to see if other faults are recorded (e.g. 0774,0775,0776,1780) | Go to Step 4 | Correct faults and read out fault memory for level control module again. If OK: --> End If not OK: --> Step 3 |
| 3 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 4 |
| 4 | Replace level control module | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test on level adjustment control unit
| Work instruction | ||
|---|---|---|
| 1 | Re-calibrate level adjustment control unit. Calibrating level adjustment control unit, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test on level adjustment control unit
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Erase fault memory with the 9718 PIWIS Tester, switch ignition off and then on again. Read out fault memory again after '5 minutes'. | > End | Go to Step 2 |
| 2 | Re-calibrate level adjustment control unit. Calibrating level adjustment control unit, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 3 |
| 3 | If the fault recurs after re-calibrating the control unit, replace level adjustment control unit. | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Move vehicle at more than 15 km/h (9 mph) | > End | Go to Step 2 |
| 2 | Replace level control module | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check battery or alternator | Engine speed > 2,000 rpm. Measure charge voltage of generator. | 11.4 - 14.5 V Go to Step 2 | Charge battery or replace if faulty. Otherwise, repair or replace alternator, wiring, diodes or regulator. Then read out fault memory again. If OK: --> End If not OK: Go to Step 2 |
| 2 | Check input voltage at fuse | Switch on ignition. Measure voltage between fuse 'F27' (15A) 'on input side' in fuse carrier at right of dashboard and ground. | 11.4 to 14.5 V Go to Step 3 | Repair or replace wiring harness or components near fuse 'on input side'. --> End |
| 3 | Check fuse | Check 3a Switch off ignition. Remove fuse 'F27' (15A) from fuse carrier at right of dashboard and check it for continuity. | Go to Step 5 | Go to Step 4 |
| Check 3b Re-insert intact fuse 'F27' (15A). Measure voltage at output of fuse 'F27' and ground. | 11.4 - 14.5 V Go to Step 7 | Go to Step 4 | ||
| 4 | Replace fuse. | Fault is no longer present (fuse not faulty) --> End | Fault still present (fuse faulty again) Go to Step 5 | |
| 5 | Check wiring between fuse 'F27' and level control module for short circuit to ground | Remove fuse 'F27' (15A) from fuse carrier at right of dashboard. Measure resistance between level control module plug A 'pins 4, 5' and ground. | < 5 ohms Go to Step 6 | Repair or replace wiring harness. --> End |
| 6 | Check wiring between fuse 'F27' and level control module for short circuit to B+ | Remove fuse 'F27' (15A) from fuse carrier at right of dashboard. Pull plug B off level control module. Measure voltage between level control module plug A 'pins 4, 5' and ground. | < 0.3 V Go to Step 7 | Repair or replace wiring harness. --> End |
| 7 | Check wiring between fuse 'F27' and level control module for open circuit | Measure resistance between level control module plug A 'pins 4, 5' and output of fuse 'F27 (15A)' in fuse carrier at right of dashboard. | < 5 ohms Go to Step 8 | Repair or replace wiring harness. --> End |
| 8 | Inspect the wiring harness from 'F27 fuse output' to level control module 'pins 4, 5' for pinches and chafing damage | No damage visible. Go to Step 9 | Repair wiring harness. --> End | |
| 9 | Check ground points and plug connection on the level control module for corrosion | No corrosion visible. Go to Step 10 | Remove and repair corrosion properly or replace various components. --> End | |
| 10 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Read out fault memory for level control module again. If OK: --> End If not OK: --> Step 2 | |
| 2 | Check wiring between front/rear left vehicle level sensors and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull off plug on front left vehicle level sensor. Pull off plug on rear left vehicle level sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 63, 64' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front/rear left vehicle level sensors and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 63, 64' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Replace front left and/or rear left vehicle level sensor. | > End | Go to Step 5 | |
| 5 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Re-calibrate level control module. Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Read out fault memory for level control module again. If OK: --> End If not OK: --> Step 2 | |
| 2 | Check wiring between front/rear right vehicle level sensors and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull off plug on front right vehicle level sensor. Pull off plug on rear right vehicle level sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 65, 66' and ground. | < 0.3 V Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front/rear right vehicle level sensors and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 65, 66' and ground. | Infinity ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Replace front right and/or rear right vehicle level sensor. | > End | Go to Step 5 | |
| 5 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between front right vehicle level sensor and level control module for short circuit to B+ | Switch off ignition. Pull plugs A and B off level control module. Pull off plug on front right vehicle level control sensor. Switch on ignition. Measure voltage between level control module plug A 'pins 65, 76' and ground and plug B 'pin 83' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between front right vehicle level sensor and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pins 65, 76' and ground and plug B 'pin 83' and ground. | Infinity ° Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between front right vehicle level sensor and level control module for open circuit | Measure resistance between level control module plug A 'pins 65, 76' and front right vehicle level control sensor plug 'pins 5, 1' and plug B 'pin 83' and front right level control sensor plug 'pin 6'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 5 | |
| 5 | Replace front right vehicle level sensor. | > End | Go to Step 6 | |
| 6 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
- Ignition on
- Internal function test on level adjustment control unit
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check compressed air lines for leaks. | Go to Step 2 | Eliminate leaks and read out fault memory again | |
| 2 | Check wiring between solenoid block and level adjustment control unit for short circuit to B+ | Switch off ignition Pull connectors A and B off level adjustment control unit Pull connector off solenoid valve Switch on ignition Measure voltage between level adjustment control unit connector A 'pin 34' and connector B 'pin 84' and ground | < 0.3 V Go to Step 3 | Repair or replace wire harness --> End |
| 3 | Check wiring between solenoid block and level adjustment control unit for short circuit to ground | Measure resistance between level adjustment control unit connector A 'pin 34', connector B 'pin 84', and ground | Infinity ohms Go to Step 4 | Repair or replace wire harness --> End |
| 4 | Check wiring between solenoid block and level adjustment control unit for open circuit | Measure resistance between level adjustment control unit connector A 'pin 34' and solenoid block connector A 'pin 8' Measure resistance between level adjustment control unit connector B 'pin 84' and solenoid block connector A 'pin 9' | 5 ohms Go to Step 5 | Repair or replace wire harness --> End |
| 5 | Check solenoid valve activation | Using the 9588 Porsche System Tester II, select the 'Actual values' menu item to check the values for 'pressure transmitter voltage and pressure' | Values OK --> End | Go to Step 6 |
| 6 | Replace solenoid block. Then check compressed air lines for leaks. | > End | Go to Step 7 | |
| 7 | Replace level adjustment control unit. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between solenoid block and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off solenoid block. Switch on ignition. Measure voltage between level control module plug A 'pin 34' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between solenoid block and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pin 34' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between solenoid block and level control module for open circuit | Measure resistance between level control module plug A 'pin 34' and solenoid block plug A 'pin 8'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Replace level control module. | > End | Go to Step 5 | |
| 5 | Replace solenoid block. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check wiring between level control system control module and level control module for short circuit to B+ | Switch off ignition. Pull plug A off level control module. Pull plug off level control system control module. Switch on ignition. Measure voltage between level control module plug A 'pin 46' and ground. | < 0.3 V Go to Step 2 | Repair or replace wiring harness. --> End |
| 2 | Check wiring between level control system control module and level control module for short circuit to ground | Switch off ignition. Measure resistance between level control module plug A 'pin 46' and ground. | Infinity ohms Go to Step 3 | Repair or replace wiring harness. --> End |
| 3 | Check wiring between level control system control module and level control module for open circuit | Measure resistance between level control module plug A 'pin 46' and level control system control module 'pin 7'. | < 5 ohms Go to Step 4 | Repair or replace wiring harness. --> End |
| 4 | Check selector switch | Use the 'Input signals' menu item in the 9588 Porsche System Tester II to check the values for 'Up switch, Down switch, shock-absorber adjustment switch, Normal level LED and Low level LED'. | > End | Go to Step 5 |
| 5 | Replace selector switch. | > End | Go to Step 6 | |
| 6 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
Note. This fault is only detected when the vehicle is driven for more than 60 seconds.
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check vehicle tires | Check that the tires on the vehicle correspond to the specified tire size. | Go to Step 2 | Repair or replace vehicle tires. --> End |
| 2 | Check vehicle level sensor mechanism | Check the connecting rods of the vehicle level sensors for damage. Check wheel suspension. | Go to Step 3 | Repair or replace mechanism. --> End |
| 3 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 4 | |
| 4 | Replace one or more vehicle level sensors. | > End | Go to Step 5 | |
| 5 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test
Note. If a vehicle level sensor or the level control module is replaced, it must be calibrated using the 9588 Porsche System Tester II.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check vehicle level sensor mechanism | Check the connecting rods of the vehicle level sensors for damage. Check wheel suspension. | Go to Step 2 | Repair or replace mechanism. --> End |
| 2 | Re-calibrate level control module Calibrating level control module, refer to 43 K2 CALIBRATION - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) . | > End | Go to Step 3 | |
| 3 | Replace one or more vehicle level sensors. | > End | Go to Step 4 | |
| 4 | Replace level control module. | > End | ||
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal level control module function test