626 – AL Wiring PWM_CM8
Cause
Corrective action
Disruption or short-circuit in
wiring to servomotor of bypass
flap (A side) M52.1.
1. Check engine wiring (→ Page 135).
2. Contact Service.
627 – AL Wiring PWM_CM9
Cause
Corrective action
Disruption or short-circuit in
wiring to servomotor of EGR
shutoff flap (B side) M53.2/
MA53.2.
1. Check engine wiring (→ Page 135).
2. Contact Service.
628 – AL Wiring PWM_CM10
Cause
Corrective action
Disruption or short-circuit in
wiring to servomotor of EGR
shutoff flap (A side) M53.1/
MA53.1.
1. Check engine wiring (→ Page 135).
2. Contact Service.
629 – AL EGR Shutoff Flap A Faulty
Cause
Corrective action
The EGR shutoff flap on the A side
(M53.1) is faulty.
u
Contact Service.
630 – AL EGR Shutoff Flap B Faulty
Cause
Corrective action
The EGR shutoff flap on the B side
(M53.2) is faulty.
u
Contact Service.
631 – AL Bypass Flap Faulty
Cause
Corrective action
The bypass flap on the A side
(M52.1) is faulty.
u
Contact Service.
633 – SD P-Ambient Air (HDT2800)
Cause
Corrective action
The signal from the air pressure
sensor (B90) is missing.
u
Contact Service.
634 – SD T0-Ambient Air (HDT2800)
Cause
Corrective action
The signal from the temperature
sensor (B90) is missing.
u
Contact Service.
82 | Troubleshooting | MS150100/04E 2015-09
TIM-ID: 0000064702 - 001
