System Checks
PAGE 1 OF 3
PINPOINT TEST A: NO/INSUFFICIENT HEATING POWER
A1: CHECK THE FUSE F13................................................................................. 412-00-4
A2: CHECK THE POWER SUPPLY OF THE FUSE F13 ..................................... 412-00-4
A3: CHECK THE FUSE F2 .................................................................................. 412-00-4
A4: CHECK THE POWER SUPPLY OF THE FUSE F2 ....................................... 412-00-5
A5: DETERMINE THE FAULT CONDITION OF THE HEATING SYSTEM........... 412-00-5
A6: CHECK THE HEATER CONTROL SOLENOID VALVE ................................. 412-00-5
A7: CHECK THE POWER SUPPLY OF THE HEATER CONTROL
SOLENOID VALVE.............................................................................................. 412-00-6
A8: CHECK THE HEATER CONTROL SOLENOID VALVE ................................. 412-00-6
A9: CHECK THE POWER SUPPLY OF THE HEATER CONTROL MODULE...... 412-00-7
A10: CHECK THE POWER SUPPLY OF THE HEATER CONTROL MODULE.... 412-00-7
A11: CHECK THE SIGNAL FROM THE TACHOMETER ..................................... 412-00-7/8
A12: CHECK THE GROUND SUPPLY OF THE HEATER CONTROL
SOLENOID VALVE.............................................................................................. 412-00-8
A13: CHECK THE GROUND SUPPLY OF THE HEATER
CONTROL MODULE ........................................................................................... 412-00-8
A14: CHECK THE HEATER CONTROL SOLENOID VALVE................................ 412-00-9
A15: CHECK THE CIRCUIT 31-CA82 FOR SHORT TO GROUND ...................... 412-00-9
PINPOINT TEST B: THE A/C SYSTEM IS INOPERATIVE
(THE HEATER BLOWER IS OK)
B1: CHECK THE FUSE F14................................................................................. 412-00-10
B2: CHECK THE POWER SUPPLY OF THE FUSE F14 ..................................... 412-00-10
B3: CHECK THE FUSE F13................................................................................. 412-00-10
B4: CHECK THE POWER SUPPLY OF THE FUSE F13 ..................................... 412-00-10/11
B5: CHECK THE POWER SUPPLY OF RELAY – A/C W.O.T ............................ 412-00-11
B6: CHECK THE POWER SUPPLY OF RELAY – A/C W.O.T ............................ 412-00-11
B7: CHECK THE A/C COMPRESSOR CLUTCH...................................................412-00-12
B8: CHECK CIRCUIT 14S-CA6 (VT/YE) FOR OPEN........................................... 412-00-12/13
B9: CHECK THE GROUND SUPPLY OF THE A/C COMPRESSOR CLUTCH..... 412-00-13
B10: CHECK THE RELAY – A/C WOT ................................................................ 412-00-13
B11: CHECK THE RELAY – A/C SWITCH............................................................412-00-14
B13: CHECK THE CIRCUIT 14S-FA90 (VT/BK) FOR OPEN ............................... 412-00-15
B14: CHECK THE GROUND SUPPLY OF THE RELAY – A/C SWITCH.............. 412-00-15
B12: CHECK THE POWER SUPPLY OF THE HEATER
AND A/C CONTROL ASSEMBLY ...................................
.................................... 412-00-14
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