With Nippondenso Compressor
Tools required- Multimeter (Fluke 83 or equivalent)
- VAG 1598 test box with VAG 1598/11 and 1598/12 adapter cables
- Connector test kit VW 1594
- LED tester US 1115
- Dial thermometer 91120 or equivalent
Test conditions
- All fuses OK as per wiring diagram
- Switch ignition OFF.
- Remove A/C control head -E87-.
- Connect VAG 1598/11 and VAG 1598/12 adapter cables to A/C control head connectors -A-, -B-, -C- and -D-.
- Leave A/C control head disconnected.
CAUTION!
- When performing electrical checks, DO NOT connect VAG 1598/11 or VAG 1598/12 adapter cables to A/C control head or damage to the control head will result.
- When using VAG 1598/11 adapter cable, VAG 1598 test box socket numbering is NOT the same as A/C control head connector numbering. VAG 1598 Test Box, Connecting
- Set measuring range on multimeter (Fluke 83 or equivalent) before connecting to test sockets or damage to electronic components may result.
NOTE: VAG 1598/11 and 1598/12 adapter cables cannot be connected simultaneously to VAG 1598 test box.
Electrical test table
Requirements
- Set multimeter (Fluke 83 or equivalent) to resistance measuring range (20 k Ohms)
- Connect VAG 1598 test box with VAG 1598/11 adapter cable Connect multimeter to VAG 1598 socket numbers indicated
Test step 1 thru 6
Requirements
- Set multimeter (Fluke 83 or equivalent) to resistance measuring range (200 Ohms)
- Connect VAG 1598 test box with VAG 1598/12 adapter cable
- Connect multimeter to VAG 1598 socket numbers indicated
Test step 7 thru 10
Requirements
- Set multimeter (Fluke 83 or equivalent) to voltage measuring range (20 V)
- Connect VAG 1598 test box with VAG 1598/11 adapter cable Connect multimeter to VAG 1598 socket numbers indicated
Test step 11 thru 13
Requirements
- Use LED tester US 1115 for the following tests
- Connect VAG 1598 test box with VAG 1598/11 adapter cable Connect LED tester to VAG 1598 socket numbers indicated
Test step 14
Notes:
Test steps 15.1 through 15.4 apply only to vehicles equipped with the Zexel A/C compressor:
Sensor -G111- has been eliminated for Nippondenso A/C compressors installed as a running change during m.y. 1996.
Requirements
- Set muitimeter (Fluke 83 or equivalent) to measure resistance (20 kn range).
- Connect VAG 1598 test box with VAG 1598/11 adapter cable.
- Connect multimeter to VAG 1598 socket numbers indicated.
Test step 15
Requirements
- Set multimeter (Fluke 83 or equivalent) to measure voltage (20 VDC range).
- Connect VAG 1598 test box with VAG 1598/11 adapter cable.
- Connect multimeter to VAG 1598 socket numbers indicated.
Test step 15 (Continued)
Requirements
- Set multimeter (Fluke 83 or equivalent) to measure vohage (20 VDC range).
- A/C clutch relay -J44- removed
- Jumper wire between A/C clutch relay socket terminals 30 and 87 (A/C clutch -N25- switched ON)
- Connect VAG 1598 test box with VAG 1598/11 adapter cable.
- Connect multimeter to VAG 1598 socket numbers indicated.
Test step 15 (Continued)
Requirements
- Set multimeter (Fluke 83 or equivalent) to measure current (20 A range).
- Connect VAG 1598 test box with VAG 1598/12 adapter cable.
- Connect multimeter to VAG 1598 socket numbers indicated.
Test step 16
Temperature-dependent resistance values of temperature sensors (in ohms)
