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Trouble-shooting
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Nominal Value
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Cause of Fault:
(If nominal value is not
attained)
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Note:
In the
following tests, a distinction has been made at times between vehicles with
and without seat adjustment memories, as the control unit for seat adjustment
with memory uses the same diagnostic lead as the engine control unit. If any
of the following tests do not apply generally for all vehicles, this is
mentioned specially.
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· Ignition ON
· Using multimeter, measure
voltage
from: battery positive terminal Ter. 30
to: ground
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greater than
11 V
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· Battery discharged
· Battery short circuit in
cell
· Battery contacts corroded
· Poor battery ground
connection
· Short circuit to ground
from: battery positive terminal Ter. 30
to: ground
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· Perform TECH 1
self-test as specified in
Operating Instructions
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TECH 1
OK
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· See TECH 1 Operating
Instructions
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· Using multimeter, measure
voltage
from: diagnostic plug XD Ter. 16
to: ground
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greater than
11 V
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· Short circuit to ground
from: diagnostic plug XD Ter. 16
to: battery positive terminal Ter. 30
· Circuit interruption
from: diagnostic plug XD Ter. 16
to: battery positive terminal Ter. 30
· Fuse F12 defective
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· Using multimeter, measure
voltage
from: diagnostic plug XD Ter. 16
to: diagnostic plug XD Ter. 4 or Ter. 5
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greater than
11 V
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· Circuit interruption
from: diagnostic plug XD Ter. 4 or Ter. 5
to: ground
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Vehicles
without electric seat/ mirror adjustment:
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· Ignition OFF
· Disconnect wiring harness
plug from DDE control unit K70
· Ignition ON
· Using multimeter, measure
voltage
from: diagnostic plug XD Ter. 7
to: ground
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lower than
0.1 V
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· Short circuit to voltage
from: diagnostic plug XD Ter. 7
to: wiring harness plug for DDE control unit K70
Ter. 42
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Vehicles
without electric seat/ mirror adjustment:
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· Ignition OFF
· Using multimeter, measure
resistance
from: diagnostic plug XD Ter. 7
to: ground
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greater than
100 kW (¥)
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· Short circuit to ground
from: diagnostic plug XD Ter. 7
to: wiring harness plug for DDE control unit K70
Ter. 42
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Vehicles
without electric seat/ mirror adjustment:
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· Using multimeter, measure
resistance
from: diagnostic plug XD Ter. 7
to: wiring harness plug for DDE control unit K70
Ter. 42
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lower than
2 W
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· Circuit interruption
from: diagnostic plug XD Ter. 7
to: wiring harness plug for DDE control unit K70
Ter. 42
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Vehicles
with electric seat/ mirror adjustment:
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· Ignition OFF
· Disconnect wiring harness
plug from DDE control unit K70
· Connect TECH 1
· In TECH 1, select
electric seat/ mirror adjustment
· Ignition ON
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Communication
possible
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· Short circuit in wiring
harness
from: diagnostic plug XD Ter. 7
to: wiring harness plug for electric seat/ mirror
adjustment K103 Ter. 6
· Control unit for electric
seat/ mirror adjustment defective (see Checking Procedures, Electronic Body
Systems)
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Vehicles
with electric seat/ mirror adjustment:
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· Ignition OFF
· Disconnect TECH 1
· Using multimeter, measure
resistance
from: wiring harness plug for DDE control unit K70 Ter. 42
to: diagnostic plug XD Ter. 7
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lower than
2 W
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· Circuit interruption
from: wiring harness plug for DDE control unit K70 Ter. 42
to: diagnostic plug XD Ter. 7
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· Ignition ON
· Using multimeter, measure
voltage
from: diagnostic plug XD Ter. 6
to: ground
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lower than
0.1 V
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· Short circuit to voltage
from: diagnostic plug XD Ter. 6
to: wiring harness plug for DDE control unit K70
Ter. 27
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· Ignition OFF
· Using multimeter, measure
resistance
from: diagnostic plug XD Ter. 6
to: ground
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greater than
100 kW (¥)
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· Short circuit to ground
from: diagnostic plug XD Ter. 6
to: wiring harness plug for DDE control unit K70
Ter. 27
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· Using multimeter, measure
resistance
from: diagnostic plug XD Ter. 6
to: wiring harness plug for DDE control unit K70
Ter. 27
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lower than
2 W
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· Circuit interruption
from: diagnostic plug XD Ter. 6
to: wiring harness plug for DDE control unit K70
Ter. 27
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· Using multimeter, measure
resistance
from: wiring harness plug for DDE control unit K70 Ter. 18
or Ter. 19
to: ground
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lower than
2 W
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· Circuit interruption
from: wiring harness plug for DDE control unit K70 Ter. 18
or Ter. 19
to: ground
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· Connect wiring harness
plug for DDE control unit K70
· Disconnect reverse
battery protection relay K17
· Using multimeter, measure
voltage
from: base of relay K 17 Ter. 8
to: ground
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11.5 to
13.5 V
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· Short circuit to ground
from: battery positive terminal Ter. 30
to: base of reverse battery protection relay K17
Ter. 8
· Circuit interruption
from: battery positive terminal Ter. 30
to: base of reverse battery protection relay K17
Ter. 8
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· Using multimeter, measure
voltage
from: base of reverse battery protection relay K17 Ter. 6
to: ground
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lower than
0.1 V
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· Short circuit to voltage
from: base of reverse battery protection relay K17 Ter. 6
to: wiring harness plug for switch S1 Ter. 15
(vehicles without anti-theft warning system/ immobilizer)
to: wiring harness plug for anti-theft warning system
control unit K94 Ter. 3 (vehicles with anti-theft warning system)
to: wiring harness plug for immobilizer control unit K117
Ter. 3 (vehicles with immobilizer)
· Fault in circuit of
anti-theft warning system/ immobilizer (see Checking Procedures, Electronic
Body Systems)
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· Ignition ON
· Using multimeter, measure
voltage
from: base of reverse battery protection relay K17 Ter. 6
to: ground
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11.5 to
13.5 V
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· Short circuit to ground/
circuit interruption
from: base of reverse battery protection relay K17 Ter. 6
to: wiring harness plug for switch S1 Ter. 15
(vehicles without anti-theft warning system/ immobilizer)
to: wiring harness plug for anti-theft warning system
control unit K94 Ter. 3 (vehicles with anti-theft warning system)
to: wiring harness plug for immobilizer control unit K117
Ter. 3 (vehicles with immobilizer)
· Fault in circuit of
anti-theft warning system/ immobilizer (see Checking Procedures, Electronic
Body Systems)
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· Using multimeter, measure
voltage
from: base of reverse battery protection relay K17 Ter. 6
to: base of reverse battery protection relay K17
Ter. 4
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11.5 to
13.5 V
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· Circuit interruption
from: base of reverse battery protection relay K17 Ter. 4
to: ground
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· Ignition OFF
· Using multimeter, measure
voltage
from: base of reverse battery protection relay K17 Ter. 2
to: ground
Note:
If this test
is performed with ignition ON, the voltage may be approx. 3 V.
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lower than
0.1 V
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· Short circuit to voltage
from: base of reverse battery protection relay K17 Ter. 2
to: wiring harness plug for DDE control unit K70
Ter. 16 or Ter. 17
to: wiring harness plug for injection pump actuator P68
Ter. 7
to: wiring harness plug for exhaust gas recirculation
solenoid valve Y18 Ter. 2
to: wiring harness plug for injection adjuster solenoid
valve Y20 Ter. 2
to: wiring harness plug for preheater time relay K25
Ter. 12
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Note:
If the
nominal value is not attained, also carry out test steps 28/ 29 (preheater
time relay), test step 21 (injection pump actuator), test step 33 (exhaust
gas recirculation solenoid valve), test step 22 (injection adjuster solenoid
valve)
· DDE control unit K70
defective
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· Bridge reverse battery
protection relay K17 with electrically fused jumper
from: base of reverse battery protection relay K17 Ter. 8
to: base of reverse battery protection relay K17
Ter. 2
· TECH 1 parameter
BATTERY VOLTAGE
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Communication possible
11.5 to 13.5 V
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· Short circuit to ground
from: base of reverse battery protection relay K17 Ter. 2
to: wiring harness plug for DDE control unit K70
Ter. 16 or Ter. 17
to: wiring harness plug for injection pump actuator P68
Ter. 7
to: wiring harness plug for exhaust gas recirculation
solenoid valve Y18 Ter. 2
to: wiring harness plug for injection adjuster solenoid
valve Y20 Ter. 2
to: wiring harness plug for preheater time relay K25
Ter. 12
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· Circuit interruption
from: base of reverse battery protection relay K17 Ter. 2
to: wiring harness plug for DDE control unit K70
Ter. 16 or Ter. 17
Note:
If the
nominal value is not attained, also carry out test steps 28/ 29 (preheater
time relay), test step 21 (injection pump actuator), test step 33 (exhaust
gas recirculation (solenoid valve), test step 22 (injection adjuster solenoid
valve)
· DDE control unit K70
defective
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If nominal
values are attained
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· Reverse battery
protection relay K17 defective
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