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New to me A25C
- Thread starter SlatcoAu
- Start date
sfrs4
Senior Member
take a look at the wiring diagrams attached, and the tables below to go with them, hopefully that might help some, have you got a "get you home" ECU? just so you can make sure it's not the trans ECU at fault?
table for A25c trans
Circuit Code Designation
Control lights
37j L25 Exhaust retarder
Instruments
37k I7 Temperature gauge transmission oil
Solenoid valves
37f ZM1∗ Transmission brake G
37f ZM2∗ Transmission brake F1
37f ZM3∗ Transmission brake E
37f ZM4∗ Transmission brake D
37f ZM5∗ Transmission clutch B2, brake F2
37f ZM6∗ Transmission clutch B1
37f ZM7∗ Transmission clutch A
37f ZM8∗ Transmission clutch H
37f ZDR∗ Transmission modulation
∗ ZM1 – ZM8, ZDR are in transmission oil sump, see Service Manual PT1050/1051
37h M17 Retarder
37i M16 Anti-throttle
37j M1 Exhaust retarder
37l M19 Reduced retarder
Relays
37 ECU Control unit for transmission
37i R13 Anti-throttle
37j R29 Exhaust retarder
37l R32 Reduced retarder 1st gear
37l R33 Reduced retarder high temperature
Sensors, warning switches, other
37f ZnAB Output speed transmission
37f ZnT Turbine speed/input speed transmission
37g GV6 Load sensor
37k GV5 Transmission oil temperature
Connectors
37 X1/A1 Connector to ECU
37f X6/A4 Connector to transmission
37g X5/A3 Connector for load sensor
37h X8/Y1 Connector for retarder valve
37i X4/BN2 Connectors
37k X3/BN1 Connectors
37k X7/A6 Connector to temperature sensor, transmission oil
table for a25c trans2
Circuit Code Designation
Fuses
37a S24 ECU
37a S25 Exhaust retarder, retarder signal
37a S26 Retarder
37c S15 Back-up light, back-up warning
Diodes
37d D23 Exhaust retarder engagement
Lights
37c L58 Back-up light
Relays
37 ECU Control unit for transmission
37a R30 Feed ECU
37c R27 Back-up light, back-up warning
Switches
37d SW13 Retarder
37d SW25 Exhaust retarder
37b ZV Gearshift selector
Sensors, warning switches, other
37c H2 Back-up audible warning
Connectors
37 X1/A1 Connector to ECU
37a, c X3/BN1 Connectors
37b X2/A2 Connector to gearshift selector
37e X4/BN2 Connectors
table for A25c trans
Circuit Code Designation
Control lights
37j L25 Exhaust retarder
Instruments
37k I7 Temperature gauge transmission oil
Solenoid valves
37f ZM1∗ Transmission brake G
37f ZM2∗ Transmission brake F1
37f ZM3∗ Transmission brake E
37f ZM4∗ Transmission brake D
37f ZM5∗ Transmission clutch B2, brake F2
37f ZM6∗ Transmission clutch B1
37f ZM7∗ Transmission clutch A
37f ZM8∗ Transmission clutch H
37f ZDR∗ Transmission modulation
∗ ZM1 – ZM8, ZDR are in transmission oil sump, see Service Manual PT1050/1051
37h M17 Retarder
37i M16 Anti-throttle
37j M1 Exhaust retarder
37l M19 Reduced retarder
Relays
37 ECU Control unit for transmission
37i R13 Anti-throttle
37j R29 Exhaust retarder
37l R32 Reduced retarder 1st gear
37l R33 Reduced retarder high temperature
Sensors, warning switches, other
37f ZnAB Output speed transmission
37f ZnT Turbine speed/input speed transmission
37g GV6 Load sensor
37k GV5 Transmission oil temperature
Connectors
37 X1/A1 Connector to ECU
37f X6/A4 Connector to transmission
37g X5/A3 Connector for load sensor
37h X8/Y1 Connector for retarder valve
37i X4/BN2 Connectors
37k X3/BN1 Connectors
37k X7/A6 Connector to temperature sensor, transmission oil
table for a25c trans2
Circuit Code Designation
Fuses
37a S24 ECU
37a S25 Exhaust retarder, retarder signal
37a S26 Retarder
37c S15 Back-up light, back-up warning
Diodes
37d D23 Exhaust retarder engagement
Lights
37c L58 Back-up light
Relays
37 ECU Control unit for transmission
37a R30 Feed ECU
37c R27 Back-up light, back-up warning
Switches
37d SW13 Retarder
37d SW25 Exhaust retarder
37b ZV Gearshift selector
Sensors, warning switches, other
37c H2 Back-up audible warning
Connectors
37 X1/A1 Connector to ECU
37a, c X3/BN1 Connectors
37b X2/A2 Connector to gearshift selector
37e X4/BN2 Connectors