Diagnostic Manual, Engines, Volume 3
Electrical Test Program - Test
| Test step |
DTC |
Scope of test
|
Test connection
|
Test condition
|
Nominal value
|
Possible cause/remedy
|
| 1.0 |
|
Diagnostic module (N59)
Voltage supply
Circuit 30 |
1 
(1.1) |
N59
|
 4
(1.4) |
Ignition: ON |
11 - 14 V |
 1.1 - 1.3.
|
| 1.1 |
|
Ground, module box
bracket (W27) |
N59
1
(1.1) |
|
X11/4
2
|
Ignition: ON |
11 - 14 V |
Ground wire at W27.
|
| 1.2 |
|
Base module (N16/1)
Voltage supply
Circuit 30
|
28 (1.28) |
N16/1
|
1
(3.1)
|
Connect socket box to N16/1.
Ignition: ON |
11 - 14 V |
Wire to terminal block (X4/10). |
| 1.3 |
9 |
DTC readout from base module (N16/1)
Voltage supply from N16/1 to diagnostic module (N59)
Circuit 30
|
29 (1.29) |
N16/1
|
12
(1.12)
|
Ignition: ON |
11 - 14 V |
N16/1. |
| 2.0 |
|
Diagnostic module (N59)
Voltage supply
Circuit 87L
|
1
(1.1) |
N59
|
3
(1.3)
|
Ignition: ON |
11 - 14 V |
2.1 - 2.2. |
| 2.1 |
|
Base module (N16/1)
Voltage supply
Circuit 15, unfused |
28
(1.28) |
N16/1
|
34
(1.34)
|
Connect socket box to N16/1.
Ignition: ON
Ignition: OFF |
11 - 14 V
<1 V |
Open circuit,
Ignition/starter switch (S2/1).
Open circuit,
S2/1.
|
| 2.2 |
10 |
Impulse readout from base module (N16/1)
Voltage supply (fused) for
LH-SFI control module (N3/1)
|
28
(1.28) |
N16/1
|
7
(1.7)
|
Ignition: ON
Ignition: OFF |
11 - 14 V
<1 V |
Fuse (F2) at N16/1,
N16/1.
|
| 3.0 |
|
Control of "CHECK ENGINE" malfunction indicator lamp
|
9
(1.9) |
N59
|
3
(1.3)
|
Ignition: ON
|
11 - 14 V |
N59. |
| 4.0 |
|
Control of diagnostic wire |
1
(1.1) |
N59
|
6
(1.6)
|
Ignition: ON
|
11 - 14 V
|
Open circuit,
N59. |
| 5.0 |
|
Control of pushbutton (X11/21) |
5
(1.5) |
N59
|
3
(1.3)
|
Ignition: ON
Press pushbutton (X11/21).
|
11 - 14 V |
Open circuit,
Pushbutton (X11/21),
N59.
|
| 6.0 |
|
Diagnostic module coding
Engine 119 (4.2 liter)
|
7
(1.7)
|
N59
|
3
(1.3)
|
Ignition: ON |
11 - 14 V |
Open circuit. |
| |
|
Engine 119 (5.0 liter) |
8
(1.8) |
N59
|
3
(1.3)
|
Ignition: ON |
11 - 14 V |
Open circuit.
|
| 7.0 |
|
CAN data bus |
L |
N59
|
H
|
Ignition: OFF
Unplug test cable or diagnostic module. Test with ohmmeter directly at the the two wide connections of the diagnostic module connector (see Figure 2).
|
55 - 65  |
Data line,
7.1 ,
7.2 |
| 7.1 |
|
CAN interface in
LH-SFI control module (N3/1)
Resistance
|
L  |
N3/1
|
 H |
Pull out LH-SFI control module (N3/1) and test directly at LH-SFI control module (see Figure 3).
|
115 - 125 |
N3/1. |
| 7.2 |
|
CAN interface in ignition control module (N1/3)
Resistance |
(B)
3 |
N1/3
|
(B)
4 |
Unplug connector "B" at ignition control module and test directly at control module (see Figure 4).
|
115 - 125 |
Ignition control module. |
 |
 |
|
Printable version
