|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
18
|
SEC. AIR PUMP REL
|
C 18 XE (without secondary air injection)
X 20 XEV:
- Engine cold, engine running
at idle speed, partial load, not full load
- Engine running at idle
speed, operating temperature
Alternative check,
if engine is already warm:
- Engine warm, disconnect
coolant temperature sensor
- Restart engine
|
NOT USED
ACTIVE
0 V
INACTIVE
12 V
ACTIVE
0 V
|
46, 47
|
44, 41
|
|
|
Note: If the coolant
temperature sensor is disconnected, a trouble code is set when the engine is
switched off.
This must be deleted
the next time the engine is started.
First check secondary
air injection relay K12 with F5: ACTUATOR
TEST, no. 07. If the results of this test are negative, proceed with
troubleshooting as described below.
|
|
Notes on Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
|
Omega - B:
· Disconnect
secondary air injection relay K12 from relay base. Ignition On.
Using multimeter, measure
voltage at relay base K12 to ground
|
|
|
|
|
- to Ter. 4 (Ter.
86)
|
greater than 11.5 V
|
· Interruption
or short circuit to ground in lead connection from control unit K69 /
Ter. 46 or from reverse battery protection relay K42 / Ter. 8 (Ter. 87)
via plug connection X30 / Ter. 6 to secondary air injection relay
K12 / Ter. 4
|
|
|
- to Ter. 8 (Ter.
87)
· Ignition
Off. Disconnect wiring harness plug from control unit K69. Ignition On.
Using multimeter,
check connection between wiring harness plug K69 / Ter. 44 and relay
base K12 / Ter. 6 (Ter. 85)
|
greater than 11.5 V
|
· Fuse
F49 defective
· Interruption
in lead from relay Kl 2 / Ter. 8 (Ter. 87) to + battery voltage
|
|
|
- for passage,
- for short circuit
to ground,
- for short circuit
to + battery voltage
|
Passage
¥ W
0 V
|
· Interruption,
short circuit to ground or to positive terminal in lead connection from
control unit K69 / Ter. 44 via plug connection X 30 / Ter. 1
to secondary air injection relay K12 / Ter. 6 (Ter. 85)
|
|
|
· Ignition
Off. Using multimeter, measure voltage and resistance between relay
base K12 / Ter. 2 (Ter. 30) and ground
|
0 V, approx. 7 W
|
· Interruption
or short circuit to ground or positive terminal in lead connection from relay
base K12 / Ter. 2 (Ter. 30) to
- secondary air
injection solenoid valve Y15
- secondary air
pump motor M27
· Interruption
in lead connection from
- secondary air
injection solenoid valve
- secondary air
pump motor M27 to ground
|
|
|
Further possible faults:
Vectra / Cavatier, Calibra:
· Disconnect
secondary air injection relay K12 from relay base. Ignition On.
Using multimeter, measure
voltage at relay base K12 to ground
|
|
· Secondary
air injection relay K12 defective
· Secondary
air injection solenoid valve defective
· Secondary
air pump motor M27 defective
|
|
|
- to Ter. 4 (Ter.
86)
|
greater than 11.5 V
|
· Interruption
or short circuit to ground in lead connection from control unit K69 /
Ter. 46 or from fuel pump relay K68 / Ter. 8 (Ter. 87) via plug
connection X57 to secondary air injection relay K 12 / Ter. 4
|
|
|
- an Kl. 8 (Kl.87)
Ignition Off. Disconnect wiring harness plug from
control unit K69. Ignition On.
Using multimeter, check connection between wiring
harness plug K69 / Ter. 44 and relay base K12 / Ter. 6 (Ter. 85)
|
greater than 11.5 V
|
· Fuse
F49 defective
· Interruption
in lead from relay Kl 2 / Ter. 8 (Ter. 87) to + battery voltage
|
|
|
- for passage,
- for short circuit
to ground,
- for short circuit
to + battery voltage
|
Passage
¥ W
0 V
|
· Interruption,
short circuit to ground or to + battery voltage in lead connection from
control unit K69 / Ter. 44 via plug connection X57 to secondary air
injection relay K12 / Ter. 6 (Ter. 85)
|
|
|
· Ignition
Off. Using multimeter, measure voltage and resistance between relay
base K12 / Ter. 2 (Ter. 30) and ground
|
0 V, approx. 7 W
|
· Interruption
or short circuit to ground or positive terminal in lead connection from relay
base K12 / Ter. 2 (Ter. 30) to
- secondary air
injection solenoid valve Y15
- secondary air
pump motor M27
· Interruption
in lead connection from
- secondary air
injection solenoid valve
- secondary air pump motor M27 to ground
|
|
|
Further possible faults:
|
|
· Secondary
air injection relay K12 defective
· Secondary
air injection solenoid valve defective
· Secondary
air pump motor M27 defective
|
|
|
|
|
|
|
|
|
|
|
