|  |    | Test scope | Test connection | Test condition | Nominal value | Possible cause/Remedy | 
  
    | 1.0 |  | Voltage supply (circuit 30)
 
 
 Ground (right wheelhousing in trunk) W7
 
 Wiring (circuit 30)
 
 
 
 Voltage supply
 (circuit 15)
 
 | 
 27
   
 
 
 
 W7
 
 
 F20-6
 Cir. 30
 
 
 
 
 27
  |  |  | 
 
 
 
 
 
 
 
 Disconnect ground wire from
  . 
 
 
 Ignition: ON
 | 
 11 - 14 V
 
 
 
 < 1
   
 
 
 < 1
   
 
 
 11 - 14 V
 | 
 F20-6 (auxiliary fuse holder in trunk)
 
 
 W7 loose,
 Open circuit.
 
 
 Open circuit.
 
 
 
 F1-8 (fuse and relay box).
 | 
  
    | 2.0 |  | Control signal to CL supply pump (M14/1, M14/2)
 Check wiring for short to circuit 31.
 
 | 
 27
  | N54    | 
        
          23 | 
 Unplug IRCL control
 module (N54).
 | 
 > 20 k
  | M14/1, M14/2. Open circuit in wiring from N54 to M14/1 or M14/2.
 | 
  
    | 2.1 |  | Control signal CL supply pump (M14/1 or M14/2)
 Check wiring for short to circuit 30.
 
 | 
 9
  | N54     | 
        
          23 | 
 Disconnect M14/1 or M14/2 and N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | Open circuit in wiring from N54 to
      M14/1 or M14/2. | 
  
    | 2.2 |  | Taillamp harness connector (X18/9)
      and wiring from IRCL control module (N54) to CL supply pump (M14/1, M14/2)
      for open circuit 
 | M14/17
  |  | N54     23 | 
 Disconnect N54 and M14/1 or M14/2.
 | 
 < 1
  | Connector (X18/9) interrupted, Open circuit in wiring from N54 to M14/1 or M14/2.
 | 
  
    | 3.0 |  | Left front door IR receiver (A26/1)
 Red indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          1 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/1,
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          1 
       | 
 Remove A26/1.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    | 3.1 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          1 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/1,
 Open circuit in wiring from N54 to A26/1.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          1 
       | 
 Remove A26/1.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    |  |  |  | A26/1
 1
  |  | N54      1 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/1.
 | 
  
    | 3.2 |  | Left front door IR receiver (A26/1)
 Green indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          20 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/1,
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          20 
       | 
 Remove A26/1.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    | 3.3 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          20 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/1,
 Open circuit in wiring from N54 to A26/1.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          20 
       | 
 Remove A26/1.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/1.
 
 | 
  
    |  |  |  | A26/1
 2
  |  | N54      20 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/1.
 | 
  
    | 3.4 |  | Left front door IR receiver (A26/1)
 Voltage supply
 | 3
  | A26/1   | 
          7 | Connect N54.
 | 11 - 14 V
 | N54, Open circuit in wiring from N54 to A26/1.
 
 | 
  
    | 3.5 |  | Left front door IR receiver (A26/1)
 Signal wire
 | 
 27
  | N54     | 
        
          18 | Lock vehicle with IR transmitter at
      left front door and keep button depressed. After completion of the locking process, read value.
 Afterwards, release button and read second value.
 
 | Difference of values between button
      depressed and button released approx. +0.3 - +0.5 V.
 | A26/1. | 
  
    | 4.0 |  | Right front door IR receiver (A26/2)
 Red indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          3 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/2,
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          3 
       | 
 Remove A26/2.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    | 4.1 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          3 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/2,
 Open circuit in wiring from N54 to A26/2.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          3 
       | 
 Remove A26/2.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    |  |  |  | A26/2
 6
  |  | N54      3 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/2.
 | 
  
    | 4.2 |  | Right front door IR receiver (A26/2)
 Green indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          10 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/2,
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          10 
       | 
 Remove A26/2.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    | 4.3 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          10 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/2,
 Open circuit in wiring from N54 to A26/2.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          10 
       | 
 Remove A26/2.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    |  |  |  | A26/2
 5
  |  | N54      10 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/2.
 
 | 
  
    | 4.4 |  | Right front door IR receiver (A26/2)
 Voltage supply
 | 7
  | A26/2   | 
          3 | Connect N54.
 | 11 - 14 V
 | N54, Open circuit in wiring from N54 to A26/2.
 
 | 
  
    | 4.5 |  | Right front door IR receiver (A26/2)
 Signal wire
 | 
 27
  | N54     | 
        
          8 | Lock vehicle with IR transmitter at
      right front door and keep button depressed. After completion of the locking process, read value.
 Afterwards, release button and read second value.
 
 | Difference of values between button
      depressed and button released approx. +0.3 - +0.5 V.
 | A26/2. | 
  
    | 5.0 |  | Trunk lid IR receiver (A26/3)
 Red indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          21 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/3,
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          21 
       | 
 Remove A26/3.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    | 5.1 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          21 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/3,
 Open circuit in wiring from N54 to A26/3.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          21 
       | 
 Remove A26/3.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    |  |  |  | A26/3
 6
  |  | N54      21 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    | 5.2 |  | Trunk lid IR receiver (A26/3) Green indicator lamp,
 wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          2 | 
 Disconnect N54.
 | 
 > 20 k
  | 
 A26/3,
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          2 
       | 
 Remove A26/3.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    | 5.3 |  | Wiring for short to circuit 30 or
      open circuit 
 | 
 9
  | N54     | 
        
          2 
       | 
 Disconnect N54.
 Disconnect ground wire from
  . 
 | 
 > 20 k
  | 
 A26/3,
 Open circuit in wiring from N54 to A26/3.
 | 
  
    |  |  |  | 
 9
  | N54     | 
        
          2 
       | 
 Remove A26/3.
 | 
 > 20 k
  | 
 Open circuit in wiring from N54 to A26/3.
 
 | 
  
    |  |  |  | A26/3
 5
  |  | N54      2 
       |  | 
 < 1
  | 
 Open circuit in wiring from N54 to A26/3.
 | 
  
    | 5.4 |  | Trunk lid IR receiver (A26/3) Voltage supply
 | 7
  | A26/3   | 
          3 | Connect N54.
 | 11 - 14 V
 | N54, Open circuit in wiring from N54 to A26/3.
 
 | 
  
    | 5.5 |  | Trunk lid IR receiver (A26/3) Signal wire
 | 
 27
  | N54     | 
        
          4 | Lock vehicle with IR transmitter at
      trunk lid and keep button depressed. After completion of the locking process, read value.
 Afterwards, release button and read second value.
 
 | Difference of values between button
      depressed and button released approx. +0.3 - +0.5 V.
 | A26/3. | 
  
    | 6.0 |  | ATA/CF microswitch (S86s1, S87s1,
      S88s1) wiring for short to circuit 30
 | 
 9
  | N54     | 
        
          11 | 
 Disconnect N54.
 Disconnect ground wire from
  . | 
 > 20 k
  | 
 Open circuit in wiring to S86s1, S87s1, S88s1 (vehicles up to 11/93),
 M14/1 or M14/2 short to circuit 30,
 ATA control module (N26),
 CF control module (N57).
 
 | 
  
    | 6.1 |  | 
 | 
 9
  | N54     | 
        
          11 
       | 
 Disconnect M14/1 or M14/2.
 
 | 
 > 20 k
  | 
 Open circuit in wiring to S86s1, S87s1, S88s1 (vehicles up to 11/93),
 ATA control module (N26),
 CF control module (N57).
 
 | 
  
    | 6.2 |  |  | 
 9
  | N54     | 
        
          11 | 
 Disconnect N26.
 | 
 > 20 k
  | 
 Open circuit in wiring to S86s1, S87s1, S88s1 (vehicles up to 11/93),
 M14/1 or M14/2 short to circuit 30,
 ATA control module (N26),
 CF control module (N57).
 | 
  
    | 6.3 |  | Vehicles up to 11/93 only 
 Right front door rotary tumbler microswitch (S87s2)
 | 
 27
  | N54     | 
        
          7 
       | 
 Close door to first detent.
 
 | 
 < 1
   
 | 
 S87s2,
 Adjustment.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          7 
       | 
 Close door completely.
 
 | 
 > 20 k
  | 
 S87s2,
 Adjustment.
 
 | 
  
    | 6.4 |  | Vehicles up to 11/93 only 
 Rotary tumbler/trunk lid microswitch (S88/1)
 | 
 27
  | N54     | 
        
          26 
       | 
 Trunk lid open.
 
 | 
 < 1
   
 | 
 S88/1.
 
 | 
  
    |  |  |  | 
 27
  | N54     | 
        
          26 
       | 
 Trunk lid closed.
 
 | 
 > 20 k
  | 
 S88/1.
 
 | 
  
    | 7.0 |   | Vehicles up to 11/93 only 
 Ignition/starter
 switch (S2/1), Interior/taillamp harness connector (X18/3), Taillamp
      harness connector (X18/9)
 Wiring for open circuit
 
 | 
 27
  | N54     | 
        
          16 
       | 
 Disconnect N54.
 Remove key from ignition.
 
 | 
 < 1
   
 | 
 S2/1,
 X18/3 open circuit,
 X18/9 open circuit,
 Open circuit, wire:
 from S2/1 to X18/3,
 from S2/1 to W1,
 from N54 to X18/9,
 from M14/1 to X18/9,
 from M14/1 to X18/3.
 
 | 
  
    | 7.1 |   | Vehicles up to 11/93 only 
 Wiring for short to circuit 31
 | 
 27
  | N54     | 
        
          16 
       | 
 Ignition key in position "1".
 
 | 
 > 20 k
   
 | 
 S2/1,
 X18/3 open circuit,
 X18/9 open circuit,
 Open circuit, wire:
 from S2/1 to X18/3,
 from S2/1 to W1,
 from N54 to X18/9,
 from M14/1 to X18/9,
 from M14/1 to X18/3.
 
 | 
  
    | 8.0 |   | Actuation of left front door actuator
      (S47) | 
 27
  | N54     | 
        
          6 
       | 
 Unlock the driver's door.
 | 
 11 - 14 V
 | 
 Open circuit in:
 Connector X18/9,
 Wire from N54 to X18/9,
 Wire from M14/1 to X18/9.
 
 | 
  
    | 9.0 |   | Vehicles up to 11/93 only 
 Actuation of right front door actuator (S48)
 | 
 27
  | N54     | 
        
          17 
       | 
 Unlock the passenger door.
 
 | 
 11 - 14 V
 
 | 
 Open circuit in:
 Connector X18/9,
 Wire from N54 to X18/9,
 Wire from M14/1 to X18/9.
 
 | 
  
    | 10.0 |   | Vehicles up to 11/93 only 
 Actuation of trunk lid lock actuator (S49)
 
 | 
 27
  | N54     | 
        
          25 | 
 Unlock the trunk.
 | 
 11 - 14 V
 | 
 Open circuit in:
 Connector X18/9,
 Wire from N54 to X18/9,
 Wire from M14/1 to X18/9.
 
 | 
  
    | 11.0 |   | Vehicles as of 12/93 only 
 Immobilization output
 
 | 
 27
  | N54     | 
        
          9 | Unlock vehicle by pointing IR transmitter
      toward one of the three IR receivers. 
 Open driver's window.
 Lock vehicle by pointing IRCL transmitter toward one of the three IR receivers.
 Ignition: ON
 
 | 
 
 11 - 14 V
 
 
 
 
 
 
 < 1 V
 | Wiring, 
  1.0, 3.0 - 5.0, N54.
 |